401k Plan data: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN plan

BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 401k Plan overview

Plan Name	BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN
Plan identification number	003

BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN Benefits

401k Plan Type

Defined Contribution Pension

Plan Features/Benefits

Profit-sharing
ERISA section 404(c) Plan - This plan, or any part of it is intended to meet the conditions of 29 CFR 2550.404c-1.
Total participant-directed account plan - Participants have the opportunity to direct the investment of all the assets allocated to their individual accounts, regardless of whether 29 CFR 2550.404c-1 is intended to be met.
Code section 401(k) feature - A cash or deferred arrangement described in Code section 401(k) that is part of a qualified defined contribution plan that provides for an election by employees to defer part of their compensation or receive these amounts in cash.
Code section 401(m) arrangement - Employee contributions are allocated to separate accounts under the plan or employer contributions are based, in whole or in part, on employee deferrals or contribtions to the plan. Not applicable if plan is 401(k) plan with only QNECs and/or QMACs. Also not applicable if Code section 403(b)(1), 403(b)(7) or 408 arrangements/accounts/annuities.
Participant-directed brokerage accounts provided as an investment option under the plan.
Plan provides for automatic enrollment in plan that has employee contributions deducted from payroll.
Total or partial participant-directed account plan - plan uses default investment account for participants who fail to direct assets in their account.
Master plan - A pension plan that is made available by a sponsor for adoption by employers; that is the subject of a favorable opinion letter; and for which a single funding medium (for example, a trust or custodial account) is established for the joint use of all adopting employers.
Plan sponsor(s) received services of leased employees, as defined in Code section 414(n), during the plan year.
Plan sponsor(s) is (are) a member(s) of a controlled group (Code sections 414(b), (c), or (m)).

401k Sponsoring company profile

BLACK HILLS CORPORATION has sponsored the creation of one or more 401k plans.

Company Name: BLACK HILLS CORPORATION

Employer identification number (EIN): 460458824

NAIC Classification: 221500

Additional information about BLACK HILLS CORPORATION

Jurisdiction of Incorporation: California Department of State

Incorporation Date: 1980-08-06

Company Identification Number: C0994582

Legal Registered Office Address: 1570 Brookhollow Dr Rm 120

Santa Ana
United States of America (USA)
92702

More information about BLACK HILLS CORPORATION

Form 5500 Filing Information

Submission information for form 5500 for 401k plan BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

Plan id# Filing Submission Date Name of Administrator Date Administrator Signed Name of Company Sponsor Date Sponsor Signed
003 2022-01-01
003 2021-01-01
003 2020-01-01
003 2019-01-01
003 2018-01-01
003 2017-01-01 MONICA LOPEZ
003 2016-01-01 MONICA LOPEZ
003 2015-01-01 MONICA LOPEZ
003 2014-01-01 MONICA LOPEZ
003 2013-01-01 SHELLY GLINES-SCHMIERER
003 2012-01-01 DEBRA BISGAARD
003 2011-01-01 DEBRA BISGAARD DEBRA BISGAARD 2012-07-23
003 2010-01-01 MARCIA GOEHRING BLACK HILLS CORPORATION 2011-07-11
003 2009-01-01 MARCIA GOEHRING

Plan Statistics for BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

401k plan membership statisitcs for BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

Measure Date Value
2022: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2022 401k membership
Total participants, beginning-of-year 2022-01-01 3,618
Total number of active participants reported on line 7a of the Form 5500 2022-01-01 2,975
Number of retired or separated participants receiving benefits 2022-01-01 0
Number of other retired or separated participants entitled to future benefits 2022-01-01 798
Total of all active and inactive participants 2022-01-01 3,773
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2022-01-01 16
Total participants 2022-01-01 3,789
Number of participants with account balances 2022-01-01 3,735
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2022-01-01 189
2021: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2021 401k membership
Total participants, beginning-of-year 2021-01-01 3,687
Total number of active participants reported on line 7a of the Form 5500 2021-01-01 2,878
Number of retired or separated participants receiving benefits 2021-01-01 0
Number of other retired or separated participants entitled to future benefits 2021-01-01 731
Total of all active and inactive participants 2021-01-01 3,609
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2021-01-01 9
Total participants 2021-01-01 3,618
Number of participants with account balances 2021-01-01 3,573
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2021-01-01 148
2020: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2020 401k membership
Total participants, beginning-of-year 2020-01-01 3,597
Total number of active participants reported on line 7a of the Form 5500 2020-01-01 2,999
Number of retired or separated participants receiving benefits 2020-01-01 0
Number of other retired or separated participants entitled to future benefits 2020-01-01 680
Total of all active and inactive participants 2020-01-01 3,679
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2020-01-01 8
Total participants 2020-01-01 3,687
Number of participants with account balances 2020-01-01 3,630
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2020-01-01 104
2019: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2019 401k membership
Total participants, beginning-of-year 2019-01-01 3,485
Total number of active participants reported on line 7a of the Form 5500 2019-01-01 2,936
Number of retired or separated participants receiving benefits 2019-01-01 0
Number of other retired or separated participants entitled to future benefits 2019-01-01 655
Total of all active and inactive participants 2019-01-01 3,591
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2019-01-01 6
Total participants 2019-01-01 3,597
Number of participants with account balances 2019-01-01 3,569
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2019-01-01 141
2018: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2018 401k membership
Total participants, beginning-of-year 2018-01-01 3,450
Total number of active participants reported on line 7a of the Form 5500 2018-01-01 2,825
Number of retired or separated participants receiving benefits 2018-01-01 0
Number of other retired or separated participants entitled to future benefits 2018-01-01 652
Total of all active and inactive participants 2018-01-01 3,477
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2018-01-01 8
Total participants 2018-01-01 3,485
Number of participants with account balances 2018-01-01 3,463
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2018-01-01 170
2017: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2017 401k membership
Total participants, beginning-of-year 2017-01-01 2,324
Total number of active participants reported on line 7a of the Form 5500 2017-01-01 1,983
Number of retired or separated participants receiving benefits 2017-01-01 0
Number of other retired or separated participants entitled to future benefits 2017-01-01 414
Total of all active and inactive participants 2017-01-01 2,397
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2017-01-01 7
Total participants 2017-01-01 2,404
Number of participants with account balances 2017-01-01 2,367
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2017-01-01 100
2016: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2016 401k membership
Total participants, beginning-of-year 2016-01-01 2,317
Total number of active participants reported on line 7a of the Form 5500 2016-01-01 1,943
Number of retired or separated participants receiving benefits 2016-01-01 0
Number of other retired or separated participants entitled to future benefits 2016-01-01 377
Total of all active and inactive participants 2016-01-01 2,320
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2016-01-01 4
Total participants 2016-01-01 2,324
Number of participants with account balances 2016-01-01 2,311
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2016-01-01 108
2015: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2015 401k membership
Total participants, beginning-of-year 2015-01-01 2,103
Total number of active participants reported on line 7a of the Form 5500 2015-01-01 1,984
Number of retired or separated participants receiving benefits 2015-01-01 0
Number of other retired or separated participants entitled to future benefits 2015-01-01 328
Total of all active and inactive participants 2015-01-01 2,312
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2015-01-01 5
Total participants 2015-01-01 2,317
Number of participants with account balances 2015-01-01 2,306
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2015-01-01 65
2014: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2014 401k membership
Total participants, beginning-of-year 2014-01-01 2,247
Total number of active participants reported on line 7a of the Form 5500 2014-01-01 1,783
Number of retired or separated participants receiving benefits 2014-01-01 0
Number of other retired or separated participants entitled to future benefits 2014-01-01 316
Total of all active and inactive participants 2014-01-01 2,099
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2014-01-01 4
Total participants 2014-01-01 2,103
Number of participants with account balances 2014-01-01 2,097
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2014-01-01 48
2013: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2013 401k membership
Total participants, beginning-of-year 2013-01-01 2,221
Total number of active participants reported on line 7a of the Form 5500 2013-01-01 1,944
Number of retired or separated participants receiving benefits 2013-01-01 0
Number of other retired or separated participants entitled to future benefits 2013-01-01 298
Total of all active and inactive participants 2013-01-01 2,242
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2013-01-01 5
Total participants 2013-01-01 2,247
Number of participants with account balances 2013-01-01 2,226
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2013-01-01 57
2012: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2012 401k membership
Total participants, beginning-of-year 2012-01-01 2,318
Total number of active participants reported on line 7a of the Form 5500 2012-01-01 1,906
Number of retired or separated participants receiving benefits 2012-01-01 0
Number of other retired or separated participants entitled to future benefits 2012-01-01 309
Total of all active and inactive participants 2012-01-01 2,215
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2012-01-01 6
Total participants 2012-01-01 2,221
Number of participants with account balances 2012-01-01 2,209
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2012-01-01 119
2011: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2011 401k membership
Total participants, beginning-of-year 2011-01-01 2,352
Total number of active participants reported on line 7a of the Form 5500 2011-01-01 2,058
Number of retired or separated participants receiving benefits 2011-01-01 0
Number of other retired or separated participants entitled to future benefits 2011-01-01 260
Total of all active and inactive participants 2011-01-01 2,318
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2011-01-01 5
Total participants 2011-01-01 2,323
Number of participants with account balances 2011-01-01 2,307
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2011-01-01 104
2010: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2010 401k membership
Total participants, beginning-of-year 2010-01-01 2,381
Total number of active participants reported on line 7a of the Form 5500 2010-01-01 2,119
Number of retired or separated participants receiving benefits 2010-01-01 0
Number of other retired or separated participants entitled to future benefits 2010-01-01 233
Total of all active and inactive participants 2010-01-01 2,352
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2010-01-01 0
Total participants 2010-01-01 2,352
Number of participants with account balances 2010-01-01 2,320
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2010-01-01 97
2009: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2009 401k membership
Total participants, beginning-of-year 2009-01-01 1,186
Total number of active participants reported on line 7a of the Form 5500 2009-01-01 2,173
Number of retired or separated participants receiving benefits 2009-01-01 0
Number of other retired or separated participants entitled to future benefits 2009-01-01 208
Total of all active and inactive participants 2009-01-01 2,381
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2009-01-01 0
Total participants 2009-01-01 2,381
Number of participants with account balances 2009-01-01 2,347
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2009-01-01 50

Measure	Date	Value
2022: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2022 401k membership
Total participants, beginning-of-year	2022-01-01	3,618
Total number of active participants reported on line 7a of the Form 5500	2022-01-01	2,975
Number of retired or separated participants receiving benefits	2022-01-01	0
Number of other retired or separated participants entitled to future benefits	2022-01-01	798
Total of all active and inactive participants	2022-01-01	3,773
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2022-01-01	16
Total participants	2022-01-01	3,789
Number of participants with account balances	2022-01-01	3,735
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2022-01-01	189
2021: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2021 401k membership
Total participants, beginning-of-year	2021-01-01	3,687
Total number of active participants reported on line 7a of the Form 5500	2021-01-01	2,878
Number of retired or separated participants receiving benefits	2021-01-01	0
Number of other retired or separated participants entitled to future benefits	2021-01-01	731
Total of all active and inactive participants	2021-01-01	3,609
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2021-01-01	9
Total participants	2021-01-01	3,618
Number of participants with account balances	2021-01-01	3,573
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2021-01-01	148
2020: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2020 401k membership
Total participants, beginning-of-year	2020-01-01	3,597
Total number of active participants reported on line 7a of the Form 5500	2020-01-01	2,999
Number of retired or separated participants receiving benefits	2020-01-01	0
Number of other retired or separated participants entitled to future benefits	2020-01-01	680
Total of all active and inactive participants	2020-01-01	3,679
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2020-01-01	8
Total participants	2020-01-01	3,687
Number of participants with account balances	2020-01-01	3,630
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2020-01-01	104
2019: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2019 401k membership
Total participants, beginning-of-year	2019-01-01	3,485
Total number of active participants reported on line 7a of the Form 5500	2019-01-01	2,936
Number of retired or separated participants receiving benefits	2019-01-01	0
Number of other retired or separated participants entitled to future benefits	2019-01-01	655
Total of all active and inactive participants	2019-01-01	3,591
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2019-01-01	6
Total participants	2019-01-01	3,597
Number of participants with account balances	2019-01-01	3,569
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2019-01-01	141
2018: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2018 401k membership
Total participants, beginning-of-year	2018-01-01	3,450
Total number of active participants reported on line 7a of the Form 5500	2018-01-01	2,825
Number of retired or separated participants receiving benefits	2018-01-01	0
Number of other retired or separated participants entitled to future benefits	2018-01-01	652
Total of all active and inactive participants	2018-01-01	3,477
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2018-01-01	8
Total participants	2018-01-01	3,485
Number of participants with account balances	2018-01-01	3,463
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2018-01-01	170
2017: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2017 401k membership
Total participants, beginning-of-year	2017-01-01	2,324
Total number of active participants reported on line 7a of the Form 5500	2017-01-01	1,983
Number of retired or separated participants receiving benefits	2017-01-01	0
Number of other retired or separated participants entitled to future benefits	2017-01-01	414
Total of all active and inactive participants	2017-01-01	2,397
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2017-01-01	7
Total participants	2017-01-01	2,404
Number of participants with account balances	2017-01-01	2,367
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2017-01-01	100
2016: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2016 401k membership
Total participants, beginning-of-year	2016-01-01	2,317
Total number of active participants reported on line 7a of the Form 5500	2016-01-01	1,943
Number of retired or separated participants receiving benefits	2016-01-01	0
Number of other retired or separated participants entitled to future benefits	2016-01-01	377
Total of all active and inactive participants	2016-01-01	2,320
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2016-01-01	4
Total participants	2016-01-01	2,324
Number of participants with account balances	2016-01-01	2,311
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2016-01-01	108
2015: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2015 401k membership
Total participants, beginning-of-year	2015-01-01	2,103
Total number of active participants reported on line 7a of the Form 5500	2015-01-01	1,984
Number of retired or separated participants receiving benefits	2015-01-01	0
Number of other retired or separated participants entitled to future benefits	2015-01-01	328
Total of all active and inactive participants	2015-01-01	2,312
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2015-01-01	5
Total participants	2015-01-01	2,317
Number of participants with account balances	2015-01-01	2,306
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2015-01-01	65
2014: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2014 401k membership
Total participants, beginning-of-year	2014-01-01	2,247
Total number of active participants reported on line 7a of the Form 5500	2014-01-01	1,783
Number of retired or separated participants receiving benefits	2014-01-01	0
Number of other retired or separated participants entitled to future benefits	2014-01-01	316
Total of all active and inactive participants	2014-01-01	2,099
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2014-01-01	4
Total participants	2014-01-01	2,103
Number of participants with account balances	2014-01-01	2,097
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2014-01-01	48
2013: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2013 401k membership
Total participants, beginning-of-year	2013-01-01	2,221
Total number of active participants reported on line 7a of the Form 5500	2013-01-01	1,944
Number of retired or separated participants receiving benefits	2013-01-01	0
Number of other retired or separated participants entitled to future benefits	2013-01-01	298
Total of all active and inactive participants	2013-01-01	2,242
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2013-01-01	5
Total participants	2013-01-01	2,247
Number of participants with account balances	2013-01-01	2,226
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2013-01-01	57
2012: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2012 401k membership
Total participants, beginning-of-year	2012-01-01	2,318
Total number of active participants reported on line 7a of the Form 5500	2012-01-01	1,906
Number of retired or separated participants receiving benefits	2012-01-01	0
Number of other retired or separated participants entitled to future benefits	2012-01-01	309
Total of all active and inactive participants	2012-01-01	2,215
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2012-01-01	6
Total participants	2012-01-01	2,221
Number of participants with account balances	2012-01-01	2,209
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2012-01-01	119
2011: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2011 401k membership
Total participants, beginning-of-year	2011-01-01	2,352
Total number of active participants reported on line 7a of the Form 5500	2011-01-01	2,058
Number of retired or separated participants receiving benefits	2011-01-01	0
Number of other retired or separated participants entitled to future benefits	2011-01-01	260
Total of all active and inactive participants	2011-01-01	2,318
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2011-01-01	5
Total participants	2011-01-01	2,323
Number of participants with account balances	2011-01-01	2,307
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2011-01-01	104
2010: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2010 401k membership
Total participants, beginning-of-year	2010-01-01	2,381
Total number of active participants reported on line 7a of the Form 5500	2010-01-01	2,119
Number of retired or separated participants receiving benefits	2010-01-01	0
Number of other retired or separated participants entitled to future benefits	2010-01-01	233
Total of all active and inactive participants	2010-01-01	2,352
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2010-01-01	0
Total participants	2010-01-01	2,352
Number of participants with account balances	2010-01-01	2,320
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2010-01-01	97
2009: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2009 401k membership
Total participants, beginning-of-year	2009-01-01	1,186
Total number of active participants reported on line 7a of the Form 5500	2009-01-01	2,173
Number of retired or separated participants receiving benefits	2009-01-01	0
Number of other retired or separated participants entitled to future benefits	2009-01-01	208
Total of all active and inactive participants	2009-01-01	2,381
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2009-01-01	0
Total participants	2009-01-01	2,381
Number of participants with account balances	2009-01-01	2,347
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2009-01-01	50

Financial Data on BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

Measure	Date	Value
2022 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2022 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2022-12-31	$-131,061
Total unrealized appreciation/depreciation of assets	2022-12-31	$-131,061
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Total income from all sources (including contributions)	2022-12-31	$-57,417,638
Total loss/gain on sale of assets	2022-12-31	$9,006
Total of all expenses incurred	2022-12-31	$52,133,641
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-12-31	$52,053,253
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-12-31	$59,615,186
Value of total assets at end of year	2022-12-31	$615,260,397
Value of total assets at beginning of year	2022-12-31	$724,811,676
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-12-31	$80,388
Total interest from all sources	2022-12-31	$1,088,841
Total dividends received (eg from common stock, registered investment company shares)	2022-12-31	$19,147,792
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2022-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2022-12-31	$19,147,792
Was this plan covered by a fidelity bond	2022-12-31	Yes
Value of fidelity bond cover	2022-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2022-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2022-12-31	No
Contributions received from participants	2022-12-31	$30,217,361
Participant contributions at end of year	2022-12-31	$9,173,637
Participant contributions at beginning of year	2022-12-31	$9,233,141
Assets. Other investments not covered elsewhere at end of year	2022-12-31	$23,994,833
Assets. Other investments not covered elsewhere at beginning of year	2022-12-31	$31,445,570
Income. Received or receivable in cash from other sources (including rollovers)	2022-12-31	$2,161,310
Other income not declared elsewhere	2022-12-31	$-7,859,610
Administrative expenses (other) incurred	2022-12-31	$55,905
Total non interest bearing cash at end of year	2022-12-31	$0
Total non interest bearing cash at beginning of year	2022-12-31	$456
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Value of net income/loss	2022-12-31	$-109,551,279
Value of net assets at end of year (total assets less liabilities)	2022-12-31	$615,260,397
Value of net assets at beginning of year (total assets less liabilities)	2022-12-31	$724,811,676
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2022-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2022-12-31	No
Were any leases to which the plan was party in default or uncollectible	2022-12-31	No
Assets. partnership/joint venture interests at end of year	2022-12-31	$17
Assets. partnership/joint venture interests at beginning of year	2022-12-31	$60
Investment advisory and management fees	2022-12-31	$24,483
Value of interest in registered invesment companies (eg mutual funds) at end of year	2022-12-31	$531,271,303
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-12-31	$637,196,895
Interest on participant loans	2022-12-31	$420,626
Value of interest in common/collective trusts at end of year	2022-12-31	$30,804,289
Value of interest in common/collective trusts at beginning of year	2022-12-31	$27,412,971
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-12-31	$867
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2022-12-31	$790
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2022-12-31	$790
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-12-31	$668,215
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2022-12-31	$-129,807,049
Net investment gain or loss from common/collective trusts	2022-12-31	$519,257
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2022-12-31	No
Was there a failure to transmit to the plan any participant contributions	2022-12-31	No
Has the plan failed to provide any benefit when due under the plan	2022-12-31	No
Assets. Invements in employer securities at end of year	2022-12-31	$19,793,957
Assets. Invements in employer securities at beginning of year	2022-12-31	$19,288,686
Contributions received in cash from employer	2022-12-31	$27,236,515
Employer contributions (assets) at end of year	2022-12-31	$221,494
Employer contributions (assets) at beginning of year	2022-12-31	$233,107
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2022-12-31	$52,053,253
Did the plan have assets held for investment	2022-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2022-12-31	No
Aggregate proceeds on sale of assets	2022-12-31	$1,773,266
Aggregate carrying amount (costs) on sale of assets	2022-12-31	$1,764,260
Opinion of an independent qualified public accountant for this plan	2022-12-31	Unqualified
Accountancy firm name	2022-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2022-12-31	133891517
2021 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2021 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2021-12-31	$2,345,300
Total unrealized appreciation/depreciation of assets	2021-12-31	$2,345,300
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Total income from all sources (including contributions)	2021-12-31	$146,406,743
Total loss/gain on sale of assets	2021-12-31	$145,454
Total of all expenses incurred	2021-12-31	$68,208,530
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2021-12-31	$68,167,510
Value of total corrective distributions	2021-12-31	$1,427
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2021-12-31	$59,258,584
Value of total assets at end of year	2021-12-31	$724,811,676
Value of total assets at beginning of year	2021-12-31	$646,613,463
Total of administrative expenses incurred including professional, contract, advisory and management fees	2021-12-31	$39,593
Total interest from all sources	2021-12-31	$1,070,359
Total dividends received (eg from common stock, registered investment company shares)	2021-12-31	$16,960,500
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2021-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2021-12-31	$16,960,500
Was this plan covered by a fidelity bond	2021-12-31	Yes
Value of fidelity bond cover	2021-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2021-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2021-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2021-12-31	No
Contributions received from participants	2021-12-31	$29,527,816
Participant contributions at end of year	2021-12-31	$9,233,141
Participant contributions at beginning of year	2021-12-31	$9,044,801
Assets. Other investments not covered elsewhere at end of year	2021-12-31	$31,445,570
Assets. Other investments not covered elsewhere at beginning of year	2021-12-31	$24,040,493
Income. Received or receivable in cash from other sources (including rollovers)	2021-12-31	$3,152,975
Other income not declared elsewhere	2021-12-31	$2,357,393
Administrative expenses (other) incurred	2021-12-31	$39,593
Total non interest bearing cash at end of year	2021-12-31	$456
Total non interest bearing cash at beginning of year	2021-12-31	$211
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Value of net income/loss	2021-12-31	$78,198,213
Value of net assets at end of year (total assets less liabilities)	2021-12-31	$724,811,676
Value of net assets at beginning of year (total assets less liabilities)	2021-12-31	$646,613,463
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2021-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2021-12-31	No
Were any leases to which the plan was party in default or uncollectible	2021-12-31	No
Assets. partnership/joint venture interests at end of year	2021-12-31	$60
Assets. partnership/joint venture interests at beginning of year	2021-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2021-12-31	$637,196,895
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2021-12-31	$564,954,598
Interest on participant loans	2021-12-31	$444,692
Value of interest in common/collective trusts at end of year	2021-12-31	$27,412,971
Value of interest in common/collective trusts at beginning of year	2021-12-31	$31,054,309
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2021-12-31	$790
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2021-12-31	$95,679
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2021-12-31	$95,679
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2021-12-31	$625,667
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2021-12-31	$63,879,400
Net investment gain or loss from common/collective trusts	2021-12-31	$389,753
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2021-12-31	No
Was there a failure to transmit to the plan any participant contributions	2021-12-31	No
Has the plan failed to provide any benefit when due under the plan	2021-12-31	No
Assets. Invements in employer securities at end of year	2021-12-31	$19,288,686
Assets. Invements in employer securities at beginning of year	2021-12-31	$17,235,619
Contributions received in cash from employer	2021-12-31	$26,577,793
Employer contributions (assets) at end of year	2021-12-31	$233,107
Employer contributions (assets) at beginning of year	2021-12-31	$187,753
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2021-12-31	$68,167,510
Did the plan have assets held for investment	2021-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2021-12-31	No
Aggregate proceeds on sale of assets	2021-12-31	$3,077,646
Aggregate carrying amount (costs) on sale of assets	2021-12-31	$2,932,192
Opinion of an independent qualified public accountant for this plan	2021-12-31	Unqualified
Accountancy firm name	2021-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2021-12-31	133891517
2020 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2020 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2020-12-31	$-3,871,497
Total unrealized appreciation/depreciation of assets	2020-12-31	$-3,871,497
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Total income from all sources (including contributions)	2020-12-31	$133,637,800
Total loss/gain on sale of assets	2020-12-31	$-441,041
Total of all expenses incurred	2020-12-31	$39,779,967
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2020-12-31	$39,732,372
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2020-12-31	$55,341,659
Value of total assets at end of year	2020-12-31	$646,613,463
Value of total assets at beginning of year	2020-12-31	$552,755,630
Total of administrative expenses incurred including professional, contract, advisory and management fees	2020-12-31	$47,595
Total interest from all sources	2020-12-31	$1,080,022
Total dividends received (eg from common stock, registered investment company shares)	2020-12-31	$11,318,293
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2020-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2020-12-31	$11,318,293
Was this plan covered by a fidelity bond	2020-12-31	Yes
Value of fidelity bond cover	2020-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2020-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2020-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2020-12-31	No
Contributions received from participants	2020-12-31	$27,282,717
Participant contributions at end of year	2020-12-31	$9,044,801
Participant contributions at beginning of year	2020-12-31	$9,095,048
Assets. Other investments not covered elsewhere at end of year	2020-12-31	$24,040,493
Assets. Other investments not covered elsewhere at beginning of year	2020-12-31	$16,146,649
Income. Received or receivable in cash from other sources (including rollovers)	2020-12-31	$2,819,847
Other income not declared elsewhere	2020-12-31	$4,719,687
Administrative expenses (other) incurred	2020-12-31	$19,361
Total non interest bearing cash at end of year	2020-12-31	$211
Total non interest bearing cash at beginning of year	2020-12-31	$10,028
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Value of net income/loss	2020-12-31	$93,857,833
Value of net assets at end of year (total assets less liabilities)	2020-12-31	$646,613,463
Value of net assets at beginning of year (total assets less liabilities)	2020-12-31	$552,755,630
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2020-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2020-12-31	No
Were any leases to which the plan was party in default or uncollectible	2020-12-31	No
Investment advisory and management fees	2020-12-31	$28,234
Value of interest in registered invesment companies (eg mutual funds) at end of year	2020-12-31	$564,954,598
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2020-12-31	$484,163,547
Interest on participant loans	2020-12-31	$485,995
Value of interest in common/collective trusts at end of year	2020-12-31	$31,054,309
Value of interest in common/collective trusts at beginning of year	2020-12-31	$22,149,140
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2020-12-31	$95,679
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2020-12-31	$5,892
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2020-12-31	$5,892
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2020-12-31	$594,027
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2020-12-31	$65,007,710
Net investment gain or loss from common/collective trusts	2020-12-31	$482,967
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2020-12-31	No
Was there a failure to transmit to the plan any participant contributions	2020-12-31	No
Has the plan failed to provide any benefit when due under the plan	2020-12-31	No
Assets. Invements in employer securities at end of year	2020-12-31	$17,235,619
Assets. Invements in employer securities at beginning of year	2020-12-31	$21,016,313
Contributions received in cash from employer	2020-12-31	$25,239,095
Employer contributions (assets) at end of year	2020-12-31	$187,753
Employer contributions (assets) at beginning of year	2020-12-31	$169,013
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2020-12-31	$39,732,372
Did the plan have assets held for investment	2020-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2020-12-31	No
Aggregate proceeds on sale of assets	2020-12-31	$3,010,178
Aggregate carrying amount (costs) on sale of assets	2020-12-31	$3,451,219
Opinion of an independent qualified public accountant for this plan	2020-12-31	Unqualified
Accountancy firm name	2020-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2020-12-31	133891517
2019 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2019 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2019-12-31	$3,836,979
Total unrealized appreciation/depreciation of assets	2019-12-31	$3,836,979
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total income from all sources (including contributions)	2019-12-31	$151,578,815
Total loss/gain on sale of assets	2019-12-31	$709,867
Total of all expenses incurred	2019-12-31	$48,035,462
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2019-12-31	$47,976,734
Value of total corrective distributions	2019-12-31	$7,799
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2019-12-31	$54,077,401
Value of total assets at end of year	2019-12-31	$552,755,630
Value of total assets at beginning of year	2019-12-31	$449,212,277
Total of administrative expenses incurred including professional, contract, advisory and management fees	2019-12-31	$50,929
Total interest from all sources	2019-12-31	$1,048,010
Total dividends received (eg from common stock, registered investment company shares)	2019-12-31	$11,097,497
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2019-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2019-12-31	$11,097,497
Was this plan covered by a fidelity bond	2019-12-31	Yes
Value of fidelity bond cover	2019-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2019-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2019-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2019-12-31	No
Contributions received from participants	2019-12-31	$25,045,681
Participant contributions at end of year	2019-12-31	$9,095,048
Participant contributions at beginning of year	2019-12-31	$9,233,582
Assets. Other investments not covered elsewhere at end of year	2019-12-31	$16,146,649
Assets. Other investments not covered elsewhere at beginning of year	2019-12-31	$13,113,489
Income. Received or receivable in cash from other sources (including rollovers)	2019-12-31	$5,168,066
Other income not declared elsewhere	2019-12-31	$2,541,133
Administrative expenses (other) incurred	2019-12-31	$25,450
Total non interest bearing cash at end of year	2019-12-31	$10,028
Total non interest bearing cash at beginning of year	2019-12-31	$44
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Value of net income/loss	2019-12-31	$103,543,353
Value of net assets at end of year (total assets less liabilities)	2019-12-31	$552,755,630
Value of net assets at beginning of year (total assets less liabilities)	2019-12-31	$449,212,277
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2019-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2019-12-31	No
Were any leases to which the plan was party in default or uncollectible	2019-12-31	No
Investment advisory and management fees	2019-12-31	$25,479
Value of interest in registered invesment companies (eg mutual funds) at end of year	2019-12-31	$484,163,547
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2019-12-31	$386,018,271
Interest on participant loans	2019-12-31	$475,609
Value of interest in common/collective trusts at end of year	2019-12-31	$22,149,140
Value of interest in common/collective trusts at beginning of year	2019-12-31	$21,974,186
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2019-12-31	$5,892
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2019-12-31	$1,185
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2019-12-31	$1,185
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2019-12-31	$572,401
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2019-12-31	$77,785,782
Net investment gain or loss from common/collective trusts	2019-12-31	$482,146
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2019-12-31	No
Was there a failure to transmit to the plan any participant contributions	2019-12-31	No
Has the plan failed to provide any benefit when due under the plan	2019-12-31	No
Assets. Invements in employer securities at end of year	2019-12-31	$21,016,313
Assets. Invements in employer securities at beginning of year	2019-12-31	$18,854,224
Contributions received in cash from employer	2019-12-31	$23,863,654
Employer contributions (assets) at end of year	2019-12-31	$169,013
Employer contributions (assets) at beginning of year	2019-12-31	$17,296
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2019-12-31	$47,976,734
Did the plan have assets held for investment	2019-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2019-12-31	No
Aggregate proceeds on sale of assets	2019-12-31	$4,495,024
Aggregate carrying amount (costs) on sale of assets	2019-12-31	$3,785,157
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2019-12-31	No
Opinion of an independent qualified public accountant for this plan	2019-12-31	Unqualified
Accountancy firm name	2019-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2019-12-31	133891517
2018 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2018 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2018-12-31	$915,839
Total unrealized appreciation/depreciation of assets	2018-12-31	$915,839
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$0
Total income from all sources (including contributions)	2018-12-31	$23,325,426
Total loss/gain on sale of assets	2018-12-31	$-149,311
Total of all expenses incurred	2018-12-31	$47,407,686
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2018-12-31	$47,352,698
Value of total corrective distributions	2018-12-31	$4,456
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2018-12-31	$47,592,676
Value of total assets at end of year	2018-12-31	$449,212,277
Value of total assets at beginning of year	2018-12-31	$473,294,537
Total of administrative expenses incurred including professional, contract, advisory and management fees	2018-12-31	$50,532
Total interest from all sources	2018-12-31	$436,802
Total dividends received (eg from common stock, registered investment company shares)	2018-12-31	$9,614,579
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2018-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2018-12-31	$9,035,229
Administrative expenses professional fees incurred	2018-12-31	$12,375
Was this plan covered by a fidelity bond	2018-12-31	Yes
Value of fidelity bond cover	2018-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2018-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2018-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2018-12-31	No
Contributions received from participants	2018-12-31	$23,163,484
Participant contributions at end of year	2018-12-31	$9,233,582
Participant contributions at beginning of year	2018-12-31	$9,393,150
Assets. Other investments not covered elsewhere at end of year	2018-12-31	$13,113,489
Assets. Other investments not covered elsewhere at beginning of year	2018-12-31	$12,299,103
Income. Received or receivable in cash from other sources (including rollovers)	2018-12-31	$2,908,970
Other income not declared elsewhere	2018-12-31	$-1,199,718
Administrative expenses (other) incurred	2018-12-31	$21,250
Total non interest bearing cash at end of year	2018-12-31	$44
Total non interest bearing cash at beginning of year	2018-12-31	$44
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Income. Non cash contributions	2018-12-31	$0
Value of net income/loss	2018-12-31	$-24,082,260
Value of net assets at end of year (total assets less liabilities)	2018-12-31	$449,212,277
Value of net assets at beginning of year (total assets less liabilities)	2018-12-31	$473,294,537
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2018-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2018-12-31	No
Were any leases to which the plan was party in default or uncollectible	2018-12-31	No
Investment advisory and management fees	2018-12-31	$16,907
Value of interest in registered invesment companies (eg mutual funds) at end of year	2018-12-31	$386,018,271
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2018-12-31	$410,622,009
Interest on participant loans	2018-12-31	$436,773
Value of interest in common/collective trusts at end of year	2018-12-31	$21,974,186
Value of interest in common/collective trusts at beginning of year	2018-12-31	$22,294,382
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2018-12-31	$1,185
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2018-12-31	$1,969
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2018-12-31	$1,969
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2018-12-31	$29
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2018-12-31	$-34,311,646
Net investment gain or loss from common/collective trusts	2018-12-31	$426,205
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2018-12-31	No
Was there a failure to transmit to the plan any participant contributions	2018-12-31	No
Has the plan failed to provide any benefit when due under the plan	2018-12-31	No
Assets. Invements in employer securities at end of year	2018-12-31	$18,854,224
Assets. Invements in employer securities at beginning of year	2018-12-31	$18,484,586
Contributions received in cash from employer	2018-12-31	$21,520,222
Employer contributions (assets) at end of year	2018-12-31	$17,296
Employer contributions (assets) at beginning of year	2018-12-31	$199,294
Income. Dividends from common stock	2018-12-31	$579,350
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2018-12-31	$47,352,698
Did the plan have assets held for investment	2018-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2018-12-31	No
Aggregate proceeds on sale of assets	2018-12-31	$2,700,103
Aggregate carrying amount (costs) on sale of assets	2018-12-31	$2,849,414
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2018-12-31	No
Opinion of an independent qualified public accountant for this plan	2018-12-31	Unqualified
Accountancy firm name	2018-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2018-12-31	133891517
2017 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2017 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2017-12-31	$-476,316
Total unrealized appreciation/depreciation of assets	2017-12-31	$-476,316
Total transfer of assets to this plan	2017-12-31	$104,890,083
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2017-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2017-12-31	$0
Total income from all sources (including contributions)	2017-12-31	$83,104,532
Total loss/gain on sale of assets	2017-12-31	$264,687
Total of all expenses incurred	2017-12-31	$24,358,219
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2017-12-31	$24,295,380
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2017-12-31	$34,776,533
Value of total assets at end of year	2017-12-31	$473,294,537
Value of total assets at beginning of year	2017-12-31	$309,658,141
Total of administrative expenses incurred including professional, contract, advisory and management fees	2017-12-31	$62,839
Total interest from all sources	2017-12-31	$264,239
Total dividends received (eg from common stock, registered investment company shares)	2017-12-31	$6,415,763
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2017-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2017-12-31	$5,875,023
Administrative expenses professional fees incurred	2017-12-31	$37,125
Was this plan covered by a fidelity bond	2017-12-31	Yes
Value of fidelity bond cover	2017-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2017-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2017-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2017-12-31	No
Contributions received from participants	2017-12-31	$17,182,313
Participant contributions at end of year	2017-12-31	$9,393,150
Participant contributions at beginning of year	2017-12-31	$6,037,002
Assets. Other investments not covered elsewhere at end of year	2017-12-31	$12,299,103
Assets. Other investments not covered elsewhere at beginning of year	2017-12-31	$11,223,788
Income. Received or receivable in cash from other sources (including rollovers)	2017-12-31	$1,419,071
Value of other receiveables (less allowance for doubtful accounts) at end of year	2017-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2017-12-31	$0
Other income not declared elsewhere	2017-12-31	$1,485,503
Administrative expenses (other) incurred	2017-12-31	$15,900
Total non interest bearing cash at end of year	2017-12-31	$44
Total non interest bearing cash at beginning of year	2017-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2017-12-31	No
Value of net income/loss	2017-12-31	$58,746,313
Value of net assets at end of year (total assets less liabilities)	2017-12-31	$473,294,537
Value of net assets at beginning of year (total assets less liabilities)	2017-12-31	$309,658,141
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2017-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2017-12-31	No
Were any leases to which the plan was party in default or uncollectible	2017-12-31	No
Investment advisory and management fees	2017-12-31	$9,814
Value of interest in registered invesment companies (eg mutual funds) at end of year	2017-12-31	$410,622,009
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2017-12-31	$255,442,967
Interest on participant loans	2017-12-31	$264,227
Value of interest in common/collective trusts at end of year	2017-12-31	$22,294,382
Value of interest in common/collective trusts at beginning of year	2017-12-31	$17,043,657
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2017-12-31	$1,969
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2017-12-31	$6,238
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2017-12-31	$6,238
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2017-12-31	$12
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2017-12-31	$40,092,807
Net investment gain or loss from common/collective trusts	2017-12-31	$281,316
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2017-12-31	No
Was there a failure to transmit to the plan any participant contributions	2017-12-31	No
Has the plan failed to provide any benefit when due under the plan	2017-12-31	No
Assets. Invements in employer securities at end of year	2017-12-31	$18,484,586
Assets. Invements in employer securities at beginning of year	2017-12-31	$19,693,882
Contributions received in cash from employer	2017-12-31	$16,175,149
Employer contributions (assets) at end of year	2017-12-31	$199,294
Employer contributions (assets) at beginning of year	2017-12-31	$210,607
Income. Dividends from common stock	2017-12-31	$540,740
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2017-12-31	$24,295,380
Did the plan have assets held for investment	2017-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2017-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2017-12-31	No
Aggregate proceeds on sale of assets	2017-12-31	$3,741,920
Aggregate carrying amount (costs) on sale of assets	2017-12-31	$3,477,233
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2017-12-31	No
Opinion of an independent qualified public accountant for this plan	2017-12-31	Unqualified
Accountancy firm name	2017-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2017-12-31	133891517
2016 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2016 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2016-12-31	$4,139,596
Total unrealized appreciation/depreciation of assets	2016-12-31	$4,139,596
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2016-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2016-12-31	$0
Total income from all sources (including contributions)	2016-12-31	$60,366,906
Total loss/gain on sale of assets	2016-12-31	$1,067,882
Total of all expenses incurred	2016-12-31	$25,379,598
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2016-12-31	$25,356,058
Value of total corrective distributions	2016-12-31	$529
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2016-12-31	$32,990,805
Value of total assets at end of year	2016-12-31	$309,658,141
Value of total assets at beginning of year	2016-12-31	$274,670,833
Total of administrative expenses incurred including professional, contract, advisory and management fees	2016-12-31	$23,011
Total interest from all sources	2016-12-31	$799,547
Total dividends received (eg from common stock, registered investment company shares)	2016-12-31	$5,131,460
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2016-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2016-12-31	$5,131,460
Was this plan covered by a fidelity bond	2016-12-31	Yes
Value of fidelity bond cover	2016-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2016-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2016-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2016-12-31	No
Contributions received from participants	2016-12-31	$16,165,634
Participant contributions at end of year	2016-12-31	$6,037,002
Participant contributions at beginning of year	2016-12-31	$5,644,225
Participant contributions at end of year	2016-12-31	$0
Participant contributions at beginning of year	2016-12-31	$68
Assets. Other investments not covered elsewhere at end of year	2016-12-31	$11,223,788
Assets. Other investments not covered elsewhere at beginning of year	2016-12-31	$8,432,909
Income. Received or receivable in cash from other sources (including rollovers)	2016-12-31	$1,647,532
Other income not declared elsewhere	2016-12-31	$764,371
Administrative expenses (other) incurred	2016-12-31	$23,011
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2016-12-31	No
Value of net income/loss	2016-12-31	$34,987,308
Value of net assets at end of year (total assets less liabilities)	2016-12-31	$309,658,141
Value of net assets at beginning of year (total assets less liabilities)	2016-12-31	$274,670,833
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2016-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2016-12-31	No
Were any leases to which the plan was party in default or uncollectible	2016-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2016-12-31	$255,442,967
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2016-12-31	$227,268,970
Interest on participant loans	2016-12-31	$236,169
Value of interest in common/collective trusts at end of year	2016-12-31	$17,043,657
Value of interest in common/collective trusts at beginning of year	2016-12-31	$16,713,456
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2016-12-31	$6,238
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2016-12-31	$226
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2016-12-31	$226
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2016-12-31	$563,378
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2016-12-31	$15,203,834
Net investment gain or loss from common/collective trusts	2016-12-31	$269,411
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2016-12-31	No
Was there a failure to transmit to the plan any participant contributions	2016-12-31	No
Has the plan failed to provide any benefit when due under the plan	2016-12-31	No
Assets. Invements in employer securities at end of year	2016-12-31	$19,693,882
Assets. Invements in employer securities at beginning of year	2016-12-31	$16,421,780
Contributions received in cash from employer	2016-12-31	$15,177,639
Employer contributions (assets) at end of year	2016-12-31	$210,607
Employer contributions (assets) at beginning of year	2016-12-31	$189,199
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2016-12-31	$25,356,058
Did the plan have assets held for investment	2016-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2016-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2016-12-31	No
Aggregate proceeds on sale of assets	2016-12-31	$4,900,014
Aggregate carrying amount (costs) on sale of assets	2016-12-31	$3,832,132
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2016-12-31	No
Opinion of an independent qualified public accountant for this plan	2016-12-31	Unqualified
Accountancy firm name	2016-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2016-12-31	133891517
2015 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2015 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2015-12-31	$-1,820,014
Total unrealized appreciation/depreciation of assets	2015-12-31	$-1,820,014
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2015-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2015-12-31	$0
Total income from all sources (including contributions)	2015-12-31	$27,839,964
Total loss/gain on sale of assets	2015-12-31	$-179,969
Total of all expenses incurred	2015-12-31	$19,641,057
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2015-12-31	$19,608,161
Value of total corrective distributions	2015-12-31	$2,061
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2015-12-31	$31,883,304
Value of total assets at end of year	2015-12-31	$274,670,833
Value of total assets at beginning of year	2015-12-31	$266,471,926
Total of administrative expenses incurred including professional, contract, advisory and management fees	2015-12-31	$30,835
Total interest from all sources	2015-12-31	$765,152
Total dividends received (eg from common stock, registered investment company shares)	2015-12-31	$7,230,754
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2015-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2015-12-31	$7,230,754
Was this plan covered by a fidelity bond	2015-12-31	Yes
Value of fidelity bond cover	2015-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2015-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2015-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2015-12-31	No
Contributions received from participants	2015-12-31	$15,788,764
Participant contributions at end of year	2015-12-31	$5,644,225
Participant contributions at beginning of year	2015-12-31	$5,407,851
Participant contributions at end of year	2015-12-31	$68
Participant contributions at beginning of year	2015-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2015-12-31	$8,432,909
Assets. Other investments not covered elsewhere at beginning of year	2015-12-31	$7,711,395
Income. Received or receivable in cash from other sources (including rollovers)	2015-12-31	$1,235,536
Other income not declared elsewhere	2015-12-31	$-681,037
Administrative expenses (other) incurred	2015-12-31	$24,600
Total non interest bearing cash at end of year	2015-12-31	$0
Total non interest bearing cash at beginning of year	2015-12-31	$24,673
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2015-12-31	No
Value of net income/loss	2015-12-31	$8,198,907
Value of net assets at end of year (total assets less liabilities)	2015-12-31	$274,670,833
Value of net assets at beginning of year (total assets less liabilities)	2015-12-31	$266,471,926
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2015-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2015-12-31	No
Were any leases to which the plan was party in default or uncollectible	2015-12-31	No
Assets. partnership/joint venture interests at end of year	2015-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2015-12-31	$86,244
Investment advisory and management fees	2015-12-31	$6,235
Value of interest in registered invesment companies (eg mutual funds) at end of year	2015-12-31	$227,268,970
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2015-12-31	$220,361,205
Interest on participant loans	2015-12-31	$230,829
Value of interest in common/collective trusts at end of year	2015-12-31	$16,713,456
Value of interest in common/collective trusts at beginning of year	2015-12-31	$15,715,434
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2015-12-31	$226
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2015-12-31	$336
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2015-12-31	$336
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2015-12-31	$534,323
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2015-12-31	$-9,615,598
Net investment gain or loss from common/collective trusts	2015-12-31	$257,372
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2015-12-31	No
Was there a failure to transmit to the plan any participant contributions	2015-12-31	No
Has the plan failed to provide any benefit when due under the plan	2015-12-31	No
Assets. Invements in employer securities at end of year	2015-12-31	$16,421,780
Assets. Invements in employer securities at beginning of year	2015-12-31	$16,920,821
Contributions received in cash from employer	2015-12-31	$14,859,004
Employer contributions (assets) at end of year	2015-12-31	$189,199
Employer contributions (assets) at beginning of year	2015-12-31	$243,967
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2015-12-31	$19,608,161
Did the plan have assets held for investment	2015-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2015-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2015-12-31	No
Aggregate proceeds on sale of assets	2015-12-31	$1,470,747
Aggregate carrying amount (costs) on sale of assets	2015-12-31	$1,650,716
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2015-12-31	No
Opinion of an independent qualified public accountant for this plan	2015-12-31	Unqualified
Accountancy firm name	2015-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2015-12-31	133891517
2014 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2014 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2014-12-31	$47,569
Total unrealized appreciation/depreciation of assets	2014-12-31	$47,569
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total income from all sources (including contributions)	2014-12-31	$44,558,413
Total loss/gain on sale of assets	2014-12-31	$200,940
Total of all expenses incurred	2014-12-31	$18,583,274
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2014-12-31	$18,556,175
Value of total corrective distributions	2014-12-31	$1,010
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2014-12-31	$28,538,842
Value of total assets at end of year	2014-12-31	$266,471,926
Value of total assets at beginning of year	2014-12-31	$240,496,787
Total of administrative expenses incurred including professional, contract, advisory and management fees	2014-12-31	$26,089
Total interest from all sources	2014-12-31	$718,751
Total dividends received (eg from common stock, registered investment company shares)	2014-12-31	$4,489,407
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2014-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2014-12-31	$4,489,407
Was this plan covered by a fidelity bond	2014-12-31	Yes
Value of fidelity bond cover	2014-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2014-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2014-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2014-12-31	No
Contributions received from participants	2014-12-31	$14,369,292
Participant contributions at end of year	2014-12-31	$5,407,851
Participant contributions at beginning of year	2014-12-31	$4,924,680
Assets. Other investments not covered elsewhere at end of year	2014-12-31	$7,711,395
Assets. Other investments not covered elsewhere at beginning of year	2014-12-31	$6,850,284
Income. Received or receivable in cash from other sources (including rollovers)	2014-12-31	$924,077
Other income not declared elsewhere	2014-12-31	$67,383
Administrative expenses (other) incurred	2014-12-31	$19,125
Total non interest bearing cash at end of year	2014-12-31	$24,673
Total non interest bearing cash at beginning of year	2014-12-31	$1,663
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2014-12-31	No
Value of net income/loss	2014-12-31	$25,975,139
Value of net assets at end of year (total assets less liabilities)	2014-12-31	$266,471,926
Value of net assets at beginning of year (total assets less liabilities)	2014-12-31	$240,496,787
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2014-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2014-12-31	No
Were any leases to which the plan was party in default or uncollectible	2014-12-31	No
Assets. partnership/joint venture interests at end of year	2014-12-31	$86,244
Assets. partnership/joint venture interests at beginning of year	2014-12-31	$78,767
Investment advisory and management fees	2014-12-31	$6,964
Value of interest in registered invesment companies (eg mutual funds) at end of year	2014-12-31	$220,361,205
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2014-12-31	$194,540,026
Interest on participant loans	2014-12-31	$210,775
Value of interest in common/collective trusts at end of year	2014-12-31	$15,715,434
Value of interest in common/collective trusts at beginning of year	2014-12-31	$16,590,021
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2014-12-31	$336
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2014-12-31	$31,829
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2014-12-31	$31,829
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2014-12-31	$507,976
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2014-12-31	$10,240,788
Net investment gain or loss from common/collective trusts	2014-12-31	$254,733
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2014-12-31	No
Was there a failure to transmit to the plan any participant contributions	2014-12-31	No
Has the plan failed to provide any benefit when due under the plan	2014-12-31	No
Assets. Invements in employer securities at end of year	2014-12-31	$16,920,821
Assets. Invements in employer securities at beginning of year	2014-12-31	$17,245,912
Contributions received in cash from employer	2014-12-31	$13,245,473
Employer contributions (assets) at end of year	2014-12-31	$243,967
Employer contributions (assets) at beginning of year	2014-12-31	$233,605
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2014-12-31	$18,556,175
Did the plan have assets held for investment	2014-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2014-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2014-12-31	No
Aggregate proceeds on sale of assets	2014-12-31	$3,100,371
Aggregate carrying amount (costs) on sale of assets	2014-12-31	$2,899,431
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2014-12-31	No
Opinion of an independent qualified public accountant for this plan	2014-12-31	Unqualified
Accountancy firm name	2014-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2014-12-31	133891517
2013 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2013 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2013-12-31	$4,700,182
Total unrealized appreciation/depreciation of assets	2013-12-31	$4,700,182
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total income from all sources (including contributions)	2013-12-31	$62,716,182
Total loss/gain on sale of assets	2013-12-31	$907,038
Total of all expenses incurred	2013-12-31	$16,933,024
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2013-12-31	$16,910,001
Value of total corrective distributions	2013-12-31	$2,645
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2013-12-31	$24,591,172
Value of total assets at end of year	2013-12-31	$240,496,787
Value of total assets at beginning of year	2013-12-31	$194,713,629
Total of administrative expenses incurred including professional, contract, advisory and management fees	2013-12-31	$20,378
Total interest from all sources	2013-12-31	$715,960
Total dividends received (eg from common stock, registered investment company shares)	2013-12-31	$3,606,480
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2013-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2013-12-31	$3,606,480
Was this plan covered by a fidelity bond	2013-12-31	Yes
Value of fidelity bond cover	2013-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2013-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2013-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2013-12-31	No
Contributions received from participants	2013-12-31	$13,071,888
Participant contributions at end of year	2013-12-31	$4,924,680
Participant contributions at beginning of year	2013-12-31	$4,574,817
Participant contributions at end of year	2013-12-31	$0
Participant contributions at beginning of year	2013-12-31	$381,565
Assets. Other investments not covered elsewhere at end of year	2013-12-31	$6,850,284
Assets. Other investments not covered elsewhere at beginning of year	2013-12-31	$4,498,516
Income. Received or receivable in cash from other sources (including rollovers)	2013-12-31	$381,056
Other income not declared elsewhere	2013-12-31	$746,095
Administrative expenses (other) incurred	2013-12-31	$17,049
Total non interest bearing cash at end of year	2013-12-31	$1,663
Total non interest bearing cash at beginning of year	2013-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Value of net income/loss	2013-12-31	$45,783,158
Value of net assets at end of year (total assets less liabilities)	2013-12-31	$240,496,787
Value of net assets at beginning of year (total assets less liabilities)	2013-12-31	$194,713,629
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2013-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2013-12-31	No
Were any leases to which the plan was party in default or uncollectible	2013-12-31	No
Assets. partnership/joint venture interests at end of year	2013-12-31	$78,767
Assets. partnership/joint venture interests at beginning of year	2013-12-31	$37,356
Investment advisory and management fees	2013-12-31	$3,329
Value of interest in registered invesment companies (eg mutual funds) at end of year	2013-12-31	$194,540,026
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2013-12-31	$156,240,609
Interest on participant loans	2013-12-31	$200,375
Value of interest in common/collective trusts at end of year	2013-12-31	$16,590,021
Value of interest in common/collective trusts at beginning of year	2013-12-31	$15,379,213
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2013-12-31	$31,829
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2013-12-31	$160
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2013-12-31	$160
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2013-12-31	$515,585
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2013-12-31	$27,149,709
Net investment gain or loss from common/collective trusts	2013-12-31	$299,546
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2013-12-31	No
Was there a failure to transmit to the plan any participant contributions	2013-12-31	No
Has the plan failed to provide any benefit when due under the plan	2013-12-31	No
Assets. Invements in employer securities at end of year	2013-12-31	$17,245,912
Assets. Invements in employer securities at beginning of year	2013-12-31	$13,029,271
Contributions received in cash from employer	2013-12-31	$11,138,228
Employer contributions (assets) at end of year	2013-12-31	$233,605
Employer contributions (assets) at beginning of year	2013-12-31	$572,122
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2013-12-31	$16,910,001
Did the plan have assets held for investment	2013-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2013-12-31	No
Aggregate proceeds on sale of assets	2013-12-31	$3,941,694
Aggregate carrying amount (costs) on sale of assets	2013-12-31	$3,034,656
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2013-12-31	No
Opinion of an independent qualified public accountant for this plan	2013-12-31	Unqualified
Accountancy firm name	2013-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2013-12-31	133891517
2012 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2012 401k financial data
Unrealized appreciation/depreciation of real estate assets	2012-12-31	$993,394
Total unrealized appreciation/depreciation of assets	2012-12-31	$993,394
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total income from all sources (including contributions)	2012-12-31	$45,458,895
Total loss/gain on sale of assets	2012-12-31	$-25,239
Total of all expenses incurred	2012-12-31	$15,350,448
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2012-12-31	$15,313,247
Value of total corrective distributions	2012-12-31	$13,251
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2012-12-31	$25,302,738
Value of total assets at end of year	2012-12-31	$194,713,629
Value of total assets at beginning of year	2012-12-31	$164,605,182
Total of administrative expenses incurred including professional, contract, advisory and management fees	2012-12-31	$23,950
Total interest from all sources	2012-12-31	$710,049
Total dividends received (eg from common stock, registered investment company shares)	2012-12-31	$3,377,671
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2012-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2012-12-31	$2,845,637
Was this plan covered by a fidelity bond	2012-12-31	Yes
Value of fidelity bond cover	2012-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2012-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2012-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2012-12-31	No
Contributions received from participants	2012-12-31	$13,406,730
Participant contributions at end of year	2012-12-31	$4,574,817
Participant contributions at beginning of year	2012-12-31	$4,173,850
Participant contributions at end of year	2012-12-31	$381,565
Participant contributions at beginning of year	2012-12-31	$44
Assets. Other investments not covered elsewhere at end of year	2012-12-31	$4,498,516
Assets. Other investments not covered elsewhere at beginning of year	2012-12-31	$3,515,216
Income. Received or receivable in cash from other sources (including rollovers)	2012-12-31	$482,352
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2012-12-31	$23,031
Other income not declared elsewhere	2012-12-31	$148,107
Administrative expenses (other) incurred	2012-12-31	$23,950
Total non interest bearing cash at beginning of year	2012-12-31	$1,152
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Value of net income/loss	2012-12-31	$30,108,447
Value of net assets at end of year (total assets less liabilities)	2012-12-31	$194,713,629
Value of net assets at beginning of year (total assets less liabilities)	2012-12-31	$164,605,182
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2012-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2012-12-31	No
Were any leases to which the plan was party in default or uncollectible	2012-12-31	No
Assets. partnership/joint venture interests at end of year	2012-12-31	$37,356
Assets. partnership/joint venture interests at beginning of year	2012-12-31	$12,739
Value of interest in registered invesment companies (eg mutual funds) at end of year	2012-12-31	$156,240,609
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2012-12-31	$129,733,512
Interest on participant loans	2012-12-31	$182,327
Income. Interest from US Government securities	2012-12-31	$0
Income. Interest from corporate debt instruments	2012-12-31	$0
Value of interest in common/collective trusts at end of year	2012-12-31	$15,379,213
Value of interest in common/collective trusts at beginning of year	2012-12-31	$14,486,717
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2012-12-31	$160
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2012-12-31	$206
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2012-12-31	$206
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2012-12-31	$527,722
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2012-12-31	$14,753,679
Net investment gain or loss from common/collective trusts	2012-12-31	$198,496
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2012-12-31	No
Was there a failure to transmit to the plan any participant contributions	2012-12-31	No
Has the plan failed to provide any benefit when due under the plan	2012-12-31	No
Assets. Invements in employer securities at end of year	2012-12-31	$13,029,271
Assets. Invements in employer securities at beginning of year	2012-12-31	$12,388,267
Contributions received in cash from employer	2012-12-31	$11,413,656
Employer contributions (assets) at end of year	2012-12-31	$572,122
Employer contributions (assets) at beginning of year	2012-12-31	$270,448
Income. Dividends from common stock	2012-12-31	$532,034
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2012-12-31	$15,313,247
Did the plan have assets held for investment	2012-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2012-12-31	No
Aggregate proceeds on sale of assets	2012-12-31	$2,288,552
Aggregate carrying amount (costs) on sale of assets	2012-12-31	$2,313,791
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2012-12-31	No
Opinion of an independent qualified public accountant for this plan	2012-12-31	Unqualified
Accountancy firm name	2012-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2012-12-31	133891517
2011 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2011 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2011-12-31	$1,204,138
Total unrealized appreciation/depreciation of assets	2011-12-31	$1,204,138
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total income from all sources (including contributions)	2011-12-31	$26,044,255
Total loss/gain on sale of assets	2011-12-31	$104,726
Total of all expenses incurred	2011-12-31	$14,064,617
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2011-12-31	$14,019,522
Value of total corrective distributions	2011-12-31	$18,970
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2011-12-31	$24,804,902
Value of total assets at end of year	2011-12-31	$164,605,182
Value of total assets at beginning of year	2011-12-31	$152,625,544
Total of administrative expenses incurred including professional, contract, advisory and management fees	2011-12-31	$26,125
Total interest from all sources	2011-12-31	$679,572
Total dividends received (eg from common stock, registered investment company shares)	2011-12-31	$2,895,337
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2011-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2011-12-31	$2,895,337
Was this plan covered by a fidelity bond	2011-12-31	Yes
Value of fidelity bond cover	2011-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2011-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2011-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2011-12-31	No
Contributions received from participants	2011-12-31	$13,139,624
Participant contributions at end of year	2011-12-31	$4,173,850
Participant contributions at beginning of year	2011-12-31	$3,749,082
Participant contributions at end of year	2011-12-31	$44
Assets. Other investments not covered elsewhere at end of year	2011-12-31	$3,515,216
Assets. Other investments not covered elsewhere at beginning of year	2011-12-31	$2,828,404
Income. Received or receivable in cash from other sources (including rollovers)	2011-12-31	$363,732
Value of other receiveables (less allowance for doubtful accounts) at end of year	2011-12-31	$23,031
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2011-12-31	$26,572
Other income not declared elsewhere	2011-12-31	$-356,292
Administrative expenses (other) incurred	2011-12-31	$26,125
Total non interest bearing cash at end of year	2011-12-31	$1,152
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Value of net income/loss	2011-12-31	$11,979,638
Value of net assets at end of year (total assets less liabilities)	2011-12-31	$164,605,182
Value of net assets at beginning of year (total assets less liabilities)	2011-12-31	$152,625,544
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2011-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2011-12-31	No
Were any leases to which the plan was party in default or uncollectible	2011-12-31	No
Assets. partnership/joint venture interests at end of year	2011-12-31	$12,739
Assets. partnership/joint venture interests at beginning of year	2011-12-31	$8,128
Value of interest in registered invesment companies (eg mutual funds) at end of year	2011-12-31	$129,733,512
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2011-12-31	$119,540,262
Interest on participant loans	2011-12-31	$167,133
Value of interest in common/collective trusts at end of year	2011-12-31	$14,486,717
Value of interest in common/collective trusts at beginning of year	2011-12-31	$14,046,531
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2011-12-31	$206
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2011-12-31	$207
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2011-12-31	$207
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2011-12-31	$512,439
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2011-12-31	$-3,590,035
Net investment gain or loss from common/collective trusts	2011-12-31	$301,907
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2011-12-31	No
Was there a failure to transmit to the plan any participant contributions	2011-12-31	No
Has the plan failed to provide any benefit when due under the plan	2011-12-31	No
Assets. Invements in employer securities at end of year	2011-12-31	$12,388,267
Assets. Invements in employer securities at beginning of year	2011-12-31	$10,280,730
Contributions received in cash from employer	2011-12-31	$11,301,546
Employer contributions (assets) at end of year	2011-12-31	$270,448
Employer contributions (assets) at beginning of year	2011-12-31	$2,145,628
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2011-12-31	$14,019,522
Did the plan have assets held for investment	2011-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2011-12-31	No
Aggregate proceeds on sale of assets	2011-12-31	$1,999,383
Aggregate carrying amount (costs) on sale of assets	2011-12-31	$1,894,657
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2011-12-31	No
Opinion of an independent qualified public accountant for this plan	2011-12-31	Unqualified
Accountancy firm name	2011-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2011-12-31	133891517
2010 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2010 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2010-12-31	$936,350
Total unrealized appreciation/depreciation of assets	2010-12-31	$936,350
Total transfer of assets to this plan	2010-12-31	$17,726
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total income from all sources (including contributions)	2010-12-31	$40,037,731
Total loss/gain on sale of assets	2010-12-31	$285,316
Total of all expenses incurred	2010-12-31	$8,018,510
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2010-12-31	$7,986,000
Value of total corrective distributions	2010-12-31	$11,960
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2010-12-31	$22,980,501
Value of total assets at end of year	2010-12-31	$152,625,544
Value of total assets at beginning of year	2010-12-31	$120,588,597
Total of administrative expenses incurred including professional, contract, advisory and management fees	2010-12-31	$20,550
Total interest from all sources	2010-12-31	$177,229
Total dividends received (eg from common stock, registered investment company shares)	2010-12-31	$2,730,666
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2010-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2010-12-31	$2,240,194
Was this plan covered by a fidelity bond	2010-12-31	Yes
Value of fidelity bond cover	2010-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2010-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2010-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2010-12-31	No
Contributions received from participants	2010-12-31	$12,053,297
Participant contributions at end of year	2010-12-31	$3,749,082
Participant contributions at beginning of year	2010-12-31	$3,015,992
Assets. Other investments not covered elsewhere at end of year	2010-12-31	$2,828,404
Assets. Other investments not covered elsewhere at beginning of year	2010-12-31	$2,047,874
Income. Received or receivable in cash from other sources (including rollovers)	2010-12-31	$915,097
Value of other receiveables (less allowance for doubtful accounts) at end of year	2010-12-31	$26,572
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2010-12-31	$18,738
Other income not declared elsewhere	2010-12-31	$243,626
Administrative expenses (other) incurred	2010-12-31	$20,550
Total non interest bearing cash at beginning of year	2010-12-31	$5,336
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Value of net income/loss	2010-12-31	$32,019,221
Value of net assets at end of year (total assets less liabilities)	2010-12-31	$152,625,544
Value of net assets at beginning of year (total assets less liabilities)	2010-12-31	$120,588,597
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2010-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2010-12-31	No
Were any leases to which the plan was party in default or uncollectible	2010-12-31	No
Assets. partnership/joint venture interests at end of year	2010-12-31	$8,128
Assets. partnership/joint venture interests at beginning of year	2010-12-31	$7,064
Value of interest in registered invesment companies (eg mutual funds) at end of year	2010-12-31	$119,540,262
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2010-12-31	$92,867,885
Interest on participant loans	2010-12-31	$177,227
Value of interest in common/collective trusts at end of year	2010-12-31	$14,046,531
Value of interest in common/collective trusts at beginning of year	2010-12-31	$13,074,748
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2010-12-31	$207
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2010-12-31	$322
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2010-12-31	$322
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2010-12-31	$2
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2010-12-31	$12,107,885
Net investment gain or loss from common/collective trusts	2010-12-31	$576,158
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2010-12-31	No
Was there a failure to transmit to the plan any participant contributions	2010-12-31	No
Has the plan failed to provide any benefit when due under the plan	2010-12-31	No
Assets. Invements in employer securities at end of year	2010-12-31	$10,280,730
Assets. Invements in employer securities at beginning of year	2010-12-31	$9,495,219
Contributions received in cash from employer	2010-12-31	$10,012,107
Employer contributions (assets) at end of year	2010-12-31	$2,145,628
Employer contributions (assets) at beginning of year	2010-12-31	$55,419
Income. Dividends from common stock	2010-12-31	$490,472
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2010-12-31	$7,986,000
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2010-12-31	No
Did the plan have assets held for investment	2010-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2010-12-31	No
Aggregate proceeds on sale of assets	2010-12-31	$2,406,160
Aggregate carrying amount (costs) on sale of assets	2010-12-31	$2,120,844
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2010-12-31	No
Opinion of an independent qualified public accountant for this plan	2010-12-31	Unqualified
Accountancy firm name	2010-12-31	DELOITTE & TOUCHE, LLP
Accountancy firm EIN	2010-12-31	133891517
2009 : BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2009 401k financial data
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2009-12-31	$0

Form 5500 Responses for BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

2022: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2022 form 5500 responses
2022-01-01	Type of plan entity	Single employer plan
2022-01-01	Submission has been amended	No
2022-01-01	This submission is the final filing	No
2022-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2022-01-01	Plan is a collectively bargained plan	Yes
2022-01-01	Plan funding arrangement – Trust	Yes
2022-01-01	Plan benefit arrangement - Trust	Yes
2021: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2021 form 5500 responses
2021-01-01	Type of plan entity	Single employer plan
2021-01-01	Submission has been amended	No
2021-01-01	This submission is the final filing	No
2021-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2021-01-01	Plan is a collectively bargained plan	Yes
2021-01-01	Plan funding arrangement – Trust	Yes
2021-01-01	Plan benefit arrangement - Trust	Yes
2020: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2020 form 5500 responses
2020-01-01	Type of plan entity	Single employer plan
2020-01-01	Submission has been amended	No
2020-01-01	This submission is the final filing	No
2020-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2020-01-01	Plan is a collectively bargained plan	Yes
2020-01-01	Plan funding arrangement – Trust	Yes
2020-01-01	Plan benefit arrangement - Trust	Yes
2019: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2019 form 5500 responses
2019-01-01	Type of plan entity	Single employer plan
2019-01-01	Submission has been amended	No
2019-01-01	This submission is the final filing	No
2019-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2019-01-01	Plan is a collectively bargained plan	Yes
2019-01-01	Plan funding arrangement – Trust	Yes
2019-01-01	Plan benefit arrangement - Trust	Yes
2018: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2018 form 5500 responses
2018-01-01	Type of plan entity	Single employer plan
2018-01-01	Submission has been amended	No
2018-01-01	This submission is the final filing	No
2018-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2018-01-01	Plan is a collectively bargained plan	Yes
2018-01-01	Plan funding arrangement – Trust	Yes
2018-01-01	Plan benefit arrangement - Trust	Yes
2017: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2017 form 5500 responses
2017-01-01	Type of plan entity	Single employer plan
2017-01-01	Submission has been amended	No
2017-01-01	This submission is the final filing	No
2017-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2017-01-01	Plan is a collectively bargained plan	Yes
2017-01-01	Plan funding arrangement – Trust	Yes
2017-01-01	Plan benefit arrangement - Trust	Yes
2016: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2016 form 5500 responses
2016-01-01	Type of plan entity	Single employer plan
2016-01-01	Submission has been amended	No
2016-01-01	This submission is the final filing	No
2016-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2016-01-01	Plan is a collectively bargained plan	Yes
2016-01-01	Plan funding arrangement – Trust	Yes
2016-01-01	Plan benefit arrangement - Trust	Yes
2015: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2015 form 5500 responses
2015-01-01	Type of plan entity	Single employer plan
2015-01-01	Submission has been amended	No
2015-01-01	This submission is the final filing	No
2015-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2015-01-01	Plan is a collectively bargained plan	Yes
2015-01-01	Plan funding arrangement – Trust	Yes
2015-01-01	Plan benefit arrangement - Trust	Yes
2014: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2014 form 5500 responses
2014-01-01	Type of plan entity	Single employer plan
2014-01-01	Submission has been amended	No
2014-01-01	This submission is the final filing	No
2014-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2014-01-01	Plan is a collectively bargained plan	Yes
2014-01-01	Plan funding arrangement – Trust	Yes
2014-01-01	Plan benefit arrangement - Trust	Yes
2013: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2013 form 5500 responses
2013-01-01	Type of plan entity	Single employer plan
2013-01-01	Submission has been amended	Yes
2013-01-01	This submission is the final filing	No
2013-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2013-01-01	Plan is a collectively bargained plan	Yes
2013-01-01	Plan funding arrangement – Trust	Yes
2013-01-01	Plan benefit arrangement - Trust	Yes
2012: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2012 form 5500 responses
2012-01-01	Type of plan entity	Single employer plan
2012-01-01	Submission has been amended	No
2012-01-01	This submission is the final filing	No
2012-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2012-01-01	Plan is a collectively bargained plan	Yes
2012-01-01	Plan funding arrangement – Trust	Yes
2012-01-01	Plan benefit arrangement - Trust	Yes
2011: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2011 form 5500 responses
2011-01-01	Type of plan entity	Single employer plan
2011-01-01	Submission has been amended	No
2011-01-01	This submission is the final filing	No
2011-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2011-01-01	Plan is a collectively bargained plan	Yes
2011-01-01	Plan funding arrangement – Trust	Yes
2011-01-01	Plan benefit arrangement - Trust	Yes
2010: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2010 form 5500 responses
2010-01-01	Type of plan entity	Single employer plan
2010-01-01	Submission has been amended	No
2010-01-01	This submission is the final filing	No
2010-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2010-01-01	Plan is a collectively bargained plan	Yes
2010-01-01	Plan funding arrangement – Trust	Yes
2010-01-01	Plan benefit arrangement - Trust	Yes
2009: BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN 2009 form 5500 responses
2009-01-01	Type of plan entity	Single employer plan
2009-01-01	Submission has been amended	No
2009-01-01	This submission is the final filing	No
2009-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2009-01-01	Plan is a collectively bargained plan	Yes
2009-01-01	Plan funding arrangement – Trust	Yes
2009-01-01	Plan benefit arrangement - Trust	Yes

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Company Name:	BLACK HILLS CORPORATION
Employer identification number (EIN):	460458824
NAIC Classification:	221500

Jurisdiction of Incorporation:	California Department of State
Incorporation Date:	1980-08-06
Company Identification Number:	C0994582
Legal Registered Office Address:	1570 Brookhollow Dr Rm 120 Santa Ana United States of America (USA) 92702