Colorado PUC E-Filings System

Attachment A.1 RES Summary Colorado PUC E-Filings System Total RECs Acquired Non-Distributed Generation Distributed Generation Retail Distributed Generation Carry Forward Previous Carry Forward Total Carry Forward Requirement Sales 1,893,812 RES 20% Requirement 378,762 Non-Distributed Generation 345,621 Distributed Generation 33,142 Retail-Distributed Gen. 16,571 Wind 104,786 95,621 16,571 104,786 73,829 178,615 Biomass - Biodiesel Pueblo - Biodiesel Rocky Ford - On-Site solar <10kW 7,512 6,192 7,512 5,640 13,152 On-Site Solar >10kW 10,491 10,379 10,491 10,287 20,778 Community Solar Garden 39 39-39 Non-Solar Retail DG (Vestas) 2,751-2,751 6,083 8,834 Purchased RECs 250,000 250,000 - Borrowed from 2014 - Borrowed from 2016 - Totals 375,578 345,621 16,571 16,571 125,578 95,839 221,418

Attachment A.2 Wind Resources Source Capacity (MW) Credits CO Eligible Resource (REC x 1.25) RESA Cost/(Savings)¹ 2007 2008 2009 2010 2011 2012 2013 2014 Carry Forward 2004 via PSCO PPA 10.43 18,875 23,594 $0 23,594 2005 via PSCO PPA 10.43 21,935 27,419 $0 27,419 2006 via PSCO PPA 10.43 32,917 41,146 $0 517 40,629-2007 via PSCO PPA 10.43 74,217 92,773 $0 46,522 46,251 2008 via PSCO PPA 10.43 198,730 248,413 $0 46,251 151,847 50,315-2009 via PSCO PPA 10.43 167,215 209,019 $0 37,056 151,578 20,385-2010 via PSCO PPA 163,272 204,090 $0 84,179 119,911-2011 via PSCO PPA 158,312 197,890 $0 54,203 143,687-2012 via PSCO PPA 0 0 $0-2012 via Busch Ranch WP 29.2 24,604 30,755 $ (163,628) 9,086 11,308 10,361-2013 Busch Ranch WP 29.2 93,472 116,840 $ (621,622) 54,074 62,766-2014 Busch Ranch WP 29.2 98,604 123,255 $ (885,029) 49,426 73,829 Jan Busch Ranch WP 29.2 6,738 8,422 $ 118,823 Feb Busch Ranch WP 29.2 6,491 8,114 $ 123,535 Mar Busch Ranch WP 29.2 5,357 6,696 $ 144,641 Apr Busch Ranch WP 29.2 9,033 11,291 $ 74,585 May Busch Ranch WP 29.2 6,754 8,442 $ 118,592 Jun Busch Ranch WP 29.2 4,993 6,242 $ 152,111 Jul Busch Ranch WP 29.2 5,384 6,730 $ 144,219 Aug Busch Ranch WP 29.2 6,198 7,748 $ 128,805 Sep Busch Ranch WP 29.2 6,624 8,280 $ 120,459 Oct Busch Ranch WP 29.2 6,207 7,759 $ 130,430 Nov Busch Ranch WP 29.2 10,271 12,838 $ 55,869 Dec Busch Ranch WP 29.2 9,779 12,223 $ 65,008 Total Busch Ranch WP 29.2 83,829 104,786 $ 1,377,077-104,786 2007 51,530 2008 87,151 2009 83,307 2010 84,179 2011 198,098 2012 210,979 2013 205,807 2014 208,122 112,192 178,615 Note¹: The 2012-2014 "RESA Cost(Savings)" represents the incremental savings applied to the RESA as a result of Decision No. C15-0317 in Proceeding No. 14A-0534E (the Black Hills' ECA/RESA Adjustment). This savings was applied to the RESA Account in March of.

Attachment A.3 Number of Applications Received Number of Completed Applications Customer Sited Solar < 10 kw Average Turnaround time for Final Authorization (Business days) Average Turnaround time for interconnection review (Business days) Installed Capacity DC Watts CO Eligible Number of RECs Total Expenditures Program Costs Rebates and REC Payments¹ 2010 2014 Carry Forward 2006 52,731 16 $ 240,882 $ 94,592 2007 154,968 223 $ 1,053,539 $ 756,186 2008 254,329 629 $ 1,469,787 $ 1,189,828 2009 922,936 1661 $ 4,265,881 $ 4,061,049 2010 2,245,636 4,541 $ 9,345,210 $ 8,846,433 1,809 2,732-2011 299,432 6,872 $ 1,626,304 $ 914,548 6,872 2012 220,440 7,268 $ 374,194 $ 157,493 7,268-2013 77,498 6,911 $ 357,857 $ 115,830-2,245 4,666-2014 48 36 267,644 7,166 $ 188,790 $ 4,683-1,526 5,640 Jan 2 3 1 65 38,054 579 $ 117,468 $ 104,216 Feb 6 3 1 79 36,518 592 $ 11,256 $ 18 Mar 4 6 1 85 4,125 609 $ 3,531 $ 190 Apr 4 2 1 52-643 $ 6,529 $ - May 1 0 1 0-624 $ 802 $ - Jun 4 6 1 47 49,663 643 $ 8,301 $ - Jul 1 5 1 87 37,867 650 $ (696) $ 502 Aug 0 1 1 75 13,778 650 $ 8,051 $ - Sep 2 2 1 145 4,160 651 $ 9,955 $ 318 Oct 3 3 1 63 15,025 636 $ 18,438 $ 619 Nov 7 5 1 55 30,285 617 $ 16,198 $ 592 Dec 8 8 1 51 48,316 618 $ 26,323 $ 203 Total 42 44 277,791 7,512 226,158 106,659-7,512 2011 2012 2013 2010 2011 2012 2013 2014 Carry forward 1,809 9,604 - - 9,513 6,192 13,152 Note¹: The majority of REC Payments for Solar DG production were paid to customers and charged to the RESA in January of 2016 and therefore, are not included above. A $1,118,773 charge to the RESA for REC Payments for both <10kW and >10kW systems occured in January of 2016.

Attachment A.4 Number of Applications Received Number of Completed Applications Customer Sited Solar > 10 kw Average Turnaround time for Final Authorization (Business days) Average Turnaround time for interconnection review Installed Capacity DC Watts CO Eligible Number of RECs Total Rebates and REC Payments¹ 2009 2010 (Business days) 2006-2007 44,460 28 $ 177,840 2008 1,185,240 211 $ 313,900 2009 991,800 2,330 $ 2,524,176 1,874 456 2010 1,050,252 4,966 $ 1,656,664 4,966 2011 1,681,260 8,566 $ 4,664,880 3,232 5334 2012 445,180 9,515 $ 984,719 7,593 1,922 2013 413,580 10,379 $ 1,557,072 10,379 2014 13 5 351,031 10,554 $ 427,884 10,287 Jan 0 0 0 0 21,909 522 $ 990,269 Feb 1 0 0 0-645 $ 21,120 Mar 1 0 0 0-813 $ 26,328 Apr 1 0 0 0-1,053 $ 41,520 May 2 0 0 0-917 $ 43,320 Jun 0 2 1 47 13,440 1,035 $ 38,664 Jul 1 2 1 87 18,200 1,105 $ 36,522 Aug 0 0 1 75 16,800 1,064 $ 35,112 Sep 0 0 0 0-1,055 $ 65,789 Oct 1 1 1 63 11,480 921 $ 41,280 Nov 1 1 1 55 11,220 744 $ 34,464 Dec 0 0 0 0-618 $ 28,176 Total 8 6 93,049 10,491 $ 1,402,565 10,491 2011 2012 2013 2014 Carry Forward 2009 2010 2011 2012 2013 2014 Carry forward 1,874-8,654 5,334 7,593 1,922 10,379 20,778 Note¹: The majority of REC Payments for Solar DG production were paid to customers and charged to the RESA in January of 2016 and therefore, are not included above. A $1,118,773 charge to the RESA for REC Payments for both <10kW and >10kW systems occured in January of 2016.

Attachment A.5 Community Solar Gardens Installed CO Eligible CSG Bill Credits and REC Carry Forward Capacity Number of Payments DC Watts RECs 2006 - $ - 2007 - $ - 2008 - $ - 2009 - $ - 2010 - $ - 2011 - $ - 2012 - $ - 2013 - $ - 2014 - $ - $ - Jan - 0 $ - Feb - 0 $ - Mar - 0 $ - Apr - 0 $ - May - 0 $ - Jun - 0 $ - Jul - 0 $ - Aug - 0 $ - Sep - 0 $ - Oct 120,000 11 $ - Nov - 14 $ - Dec 14 $ 674 Total 120,000 39 $ 674 39-39

Attachment A.6 Non-solar Retail DG Installed Capacity Number of RECs Total REC Payments 2010 2011 2012 2013 2014 Carry Forward DC Watts 2006-2007 - 0 $ - 2008-0 $ - 2009-0 $ - 2010 1,800,000 1,326 $ 92,812 1,326-2011 - 2,976 $ 208,293 2,426 550-2012 - 3,165 $ 223,679-3,165-2013 - 2,681 $ 190,388 2,681 2014-3,402 $ 242,926 3,402 Jan 262 $ 18,804 Feb 259 $ 18,680 Mar 157 $ 11,354 Apr 258 $ 18,588 May 286 $ 20,603 Jun 215 $ 15,475 Jul 187 $ 13,460 Aug 236 $ 17,031 Sep 137 $ 9,889 Oct 170 $ 12,270 Nov 345 $ 24,906 Dec 239 $ 17,215 Total - 2,751 $ 198,275 2,751 2010 0 2011 0 2012 3,752 2013 3,715 2014-8,834

Attachment A.7 Misc. REC Purchases/Sales Number of RECs Total REC Payments 2007 2008 2009 2010 2011 2012 2013 2014 Carry Forward 2006 2007 2007 1,500 $ 35,250 1,109 391-2008 1,500 $ 35,250 1,433 67-2009 2,000 $ 30,000 1,679 321-2010 2,000 $ 31,920 1,489 511-2011 2,000 $ 37,500 2,000-2012 -2,000 $ (7,000) (2,000) - 2013 0 $ 2014 0 $ 250,000 $ 115,000 250,000-2007 1,109 2008 1,824-2009 1,746 2010 1,810-2011 2,511-2012 (2,000) - 2013-2014 - 250,000 -

Attachment A.8 Biomass Resources Source Capacity (MW) Estimated Annual Electric Generation Credits CO Eligible Resource (REC x 1.25) 2006 W.N. Clark Station 42.5 100 197 246 $0 2007 W.N. Clark Station 42.5 100 687 859 $0 2008 W.N. Clark Station 42.5 100 731 914 $0 2009 W.N. Clark Station 42.5 100 421 527 $0 2010 W.N. Clark Station 42.5 100 2,023 2,528 $0 2011 W.N. Clark Station 42.5 100 169 212 $0 2012 W.N. Clark Station 42.5 100 0 0 $0 2013 W.N. Clark Station 0 0 0 0 $0 2014 W.N. Clark Station 0 0 0 0 $0 Jan W.N. Clark Station 0 0 0.00 0.00 $0 Feb W.N. Clark Station 0 0 0.00 0.00 $0 Mar W.N. Clark Station 0 0 0.00 0.00 $0 Apr W.N. Clark Station 0 0 0.00 0.00 $0 May W.N. Clark Station 0 0 0.00 0.00 $0 Jun W.N. Clark Station 0 0 0.00 0.00 $0 Jul W.N. Clark Station 0 0 0.00 0.00 $0 Aug W.N. Clark Station 0 0 0.00 0.00 $0 Sep W.N. Clark Station 0 0 0.00 0.00 $0 Oct W.N. Clark Station 0 0 0.00 0.00 $0 Nov W.N. Clark Station 0 0 0.00 0.00 $0 Dec W.N. Clark Station 0 0 0.00 0.00 $0 Total 0.00 0.00 $0 Cost 0

Attachment A.9 Biodiesel Resources Source Capacity (MW) Estimated Annual Electric Generation Credits CO Eligible Resource (REC x 1.25) 2007 Pueblo Station 171 214 $0 2008 Pueblo Station 57 71 $0 2009 Pueblo Station 26 33 $0 2010 Pueblo Station 23 29 $0 2011 Pueblo Station 13 16 $0 2012 Pueblo Station 0 0 $0 2013 Pueblo Station 0 0 $0 2014 Pueblo Station 0 0 $0 Jan Pueblo Station 10 0 0.00 0.00 $0 Feb Pueblo Station 10 0 0.00 0.00 $0 Mar Pueblo Station 10 0 0.00 0.00 $0 Apr Pueblo Station 10 0 0.00 0.00 $0 May Pueblo Station 10 0 0.00 0.00 $0 Jun Pueblo Station 10 0 0.00 0.00 $0 Jul Pueblo Station 10 0 0.00 0.00 $0 Aug Pueblo Station 10 0 0.00 0.00 $0 Sep Pueblo Station 10 0 0.00 0.00 $0 Oct Pueblo Station 10 0 0.00 0.00 $0 Nov Pueblo Station 10 0 0.00 0.00 $0 Dec Pueblo Station 10 0 0.00 0.00 $0 Total 0.00 0.00 $0 Cost 0

Attachment A.10 Biodiesel Resources Source Capacity (MW) Estimated Annual Electric Generation Credits CO Eligible Resource (REC x 1.25) 2007 Rocky Ford Station 318 398 $0 2008 Rocky Ford Station 317 396 $0 2009 Rocky Ford Station 357 446 $0 2010 Rocky Ford Station 103 129 $0 2011 Rocky Ford Station 0 0 $0 2012 Rocky Ford Station 0 0 $0 2013 Rocky Ford Station 0 0 $0 2014 Rocky Ford Station 0 0 $0 Jan Rocky Ford Station 10 0 0.00 0.00 $0 Feb Rocky Ford Station 10 0 0.00 0.00 $0 Mar Rocky Ford Station 10 0 0.00 0.00 $0 Apr Rocky Ford Station 10 0 0.00 0.00 $0 May Rocky Ford Station 10 0 0.00 0.00 $0 Jun Rocky Ford Station 10 0 0.00 0.00 $0 Jul Rocky Ford Station 10 0 0.00 0.00 $0 Aug Rocky Ford Station 10 0 0.00 0.00 $0 Sep Rocky Ford Station 10 0 0.00 0.00 $0 Oct Rocky Ford Station 10 0 0.00 0.00 $0 Nov Rocky Ford Station 10 0 0.00 0.00 $0 Dec Rocky Ford Station 10 0 0.00 0.00 $0 Total 0.00 0.00 $0 Cost 0

Black Hills Energy Standard Adjustment Attachment A.11 Revenues Collected and Expenditures Total Total Total Total Total Total Total Total Total Summary 2007 2008 2009 2010 2011 2012 2013 2014 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Revenue Collected $1,572,497 $1,595,972 $2,198,266 $3,432,290 $3,890,489 $4,882,551 $4,584,851 $4,771,758 $412,603 $398,210 $408,873 $366,491 $335,623 $431,678 $436,829 $449,113 $448,454 $426,898 $402,733 $433,789 $4,951,293 Deposits Collected/(Refunded) 23,715 (1,047) (24,905) Expenditures by Type Common to All Programs 121,801 110,957 52,825 18,308 1,548,398 1,323,695 1,068,502 1,085,230 80,820 93,609 (3,773,998) 67,933 28,156 371,515 119,152 27,901 103,136 95,855 77,997 110,061 (2,597,861) Customer Sited Solar 119,512 174,853 152,008 192,757 216,059 206,486 224,289 171,515 13,144 9,931 4,063 6,451 2,677 7,581 4,532 7,843 9,152 12,169 15,126 10,308 102,977 Rebate/REC Payments 934,026 1,503,908 6,585,225 10,535,017 5,561,068 1,142,212 1,672,902 432,567 1,094,485 21,138 26,518 41,520 43,320 38,664 37,024 35,112 66,108 41,899 35,056 28,379 1,509,224 REC Paymennts Payable 460,000 92,000 92,000 92,000 92,000 92,000 92,000 92,000 1,104,000 Non Customer Sited Solar REC's - 35,250-30,000 37,500 (7,000) - Purchased RECs - 115,000 115,000 Total Expenditures $1,175,339 $1,824,968 $6,790,057 $10,776,082 $7,363,025 $2,665,394 $2,965,692 $1,689,312 $1,188,449 $124,678 -$3,743,417 $115,905 $534,153 $509,760 $252,709 $ 162,857 $270,395 $241,924 $220,179 $355,748 233,339.65 Revenues Less Expenditures $397,158 ($228,996) ($4,591,791) ($7,343,791) $2,216,110 $1,594,255 $3,082,446 ($775,846) $273,532 $4,152,289 $250,586 ($198,530) ($78,082) $184,121 $286,257 $178,059 $184,974 $182,554 $78,041 $4,717,953 Cummulative Balance - (Under)/Over Collected ($9,421,528) ($9,147,996) ($4,995,707) ($4,745,121) ($4,943,651) ($5,021,733) ($4,837,612) ($4,551,356) ($4,373,297) ($4,188,323) ($4,005,769) ($3,927,728) (115,722) RES Plan Costs not yet charged to RESA ($4,043,450) Ending Balance for 2018-2021 RES Plan Filing Note: The Commission-approved ECA/RESA Adjustment from Docket No. 14A-0534E was booked in March. This resulted in a $3,842,768 reduction to the negative RESA balance. The Commission approved this adjustment by Decision No. C15-0317. A.11 - Total Summary

Black Hills Energy Standard Adjustment Attachment A.12 Expenditures - Common to All Programs Total Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 2014 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Labor - Labor - Contract 48,763 4,875 - Avoided Cost Adjustments (3,842,769) 337,457 95,399 76,549 64,301 53,235 70,500 (3,145,328) Outside Services - Consulting Fees 14,694 28,240 4,675-175 - 483 - Outside Services - Legal Fees 55,552 56,108 36,935 Outside Services - Other - 30 - Travel 2,673 7,043 2,588 4,247 12,856 4,147 5,872 2,491-324 44 18 22 409 Materials 91 1,063 - Office Expense - Printing - 5,142 1,578-1,361 2,354-34 83-133 216 Office Expense - Other 29 9,519 7,049 12,998 6,684 4,215 11,383 10,068 (10,841) 1,676 (811) (1,531) (1,875) 721 (5,730) 208 485 5,649 459 16,353 4,764 Subtotal 21,076 10,715 17,738 12,593 (10,841) 2,001 (3,843,453) (1,513) (1,875) 338,178 89,669 208 77,034 69,950 53,715 86,986 (3,139,939) Interest - 287,712 1,527,322 1,312,902 1,050,764 1,072,638 91,661 91,609 69,455 69,446 30,030 33,337 29,483 27,693 26,101 25,905 24,282 23,075 542,078 Total Expenditures $121,801 $110,957 $52,825 $306,020 $1,548,398 $1,323,617 $1,068,502 $1,085,230 $80,820 $93,609 $ (3,773,998) $67,933 $28,156 $371,515 $119,152 $27,901 $103,136 $95,855 $77,997 $110,061 $ (2,597,861) A.12 - Common Expenditures

Black Hills Energy Standard Adjustment Attachment A.13 Expenditures - Customer Sited Solar Total Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 2014 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Labor 110,538 155,409 152,008 192,757 216,059 206,486 224,289 171,515 13,144 9,931 4,063 6,451 2,677 7,581 4,532 7,843 9,152 12,169 15,126 10,308 102,977 Labor - Contract - 12,156 - Outside Services - Consulting Fees - Outside Services - Legal Fees 3,489 2,620 - Outside Services - Other - Travel 2,042 Materials 778 812 - Office Expense - Printing 1,801 3,856 - Office Expense - Energy Efficiency Incentives 865 - Total Expenditures $119,512 $174,853 $152,008 $192,757 $216,059 $206,486 $224,289 $171,515 $13,144 $9,931 $4,063 $6,451 $2,677 $7,581 $4,532 $7,843 $9,152 $12,169 $15,126 $10,308 $102,977 A.13 - Customer Sited Solar

Black Hills Energy Standard Adjustment Attachment A.14 Expenditures - Program Payments Total Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 2014 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Labor - Labor - Contract - Outside Services - Consulting Fees - Outside Services - Legal Fees - Outside Services - Other - Travel - Materials - Office Expense - Solar Rebate/REC Payments 934,026 1,503,908 6,585,225 10,503,097 5,561,068 1,142,212 1,672,902 432,567 1,094,485 21,138 26,518 41,520 43,320 38,664 37,024 35,112 66,108 41,899 35,056 28,379 1,509,224 Solar Rebate/REC Payments Payable 460,000 92,000 92,000 92,000 92,000 92,000 92,000 92,000 1,104,000 Purchased RECs 115,000 115,000 Non Customer Sited - REC Payments 35,250-61,920 37,500 (7,000) - Total Expenditures $934,026 $1,539,158 $6,585,225 $10,565,017 $5,598,568 1,135,212 1,672,902 432,567 ####### $21,138 $26,518 $41,520 $503,320 $130,664 $129,024 $127,112 $158,108 $133,899 $127,056 $235,379 2,728,224 A.14 - Program Payments