Colorado PUC E-Filings System

Colorado PUC E-Filings System Attachment A.1 RES Summary Total Acquired Non-Distributed Generation Distributed Generation Retail Distributed Generation Carry Forward Previous Carry Forward Total Carry Forward Requirement Sales MWh 1,829,650 RES 12% Requirement MWh 219,558 Non-Distributed Generation 196,687 Distributed Generation 22,871 Retail-Distributed Gen. 11,435 Wind MWh 123,255 196,687 11,435 123,255 62,766 186,021 Biomass MWh - - - - - - - Biodiesel Pueblo MWh - - - - - - - Biodiesel Rocky Ford MWh - - - - - - - Off-Site Solar MWh - - - - - - - On-Site solar <10kW MWh 7,166 - - 9,513 7,166 4,666 11,832 On-Site Solar >10kW MWh 10,287 - - 1,922 10,287 10,379 20,666 Non-Solar Retail DG MWh 3,402 - - - 3,402 2,681 6,083 Applied to MWh - - - - - Borrowed from 2015 MWh - - - - - Totals MWh 144,110 196,687 11,435 11,435 144,110 80,492 224,602

Attachment A.2 Wind Resources Period Source (MW) Estimated Annual Electric Generation Credits CO Eligible Resource (REC x 1.25) RESA Cost/(Savings)¹ 2007 2008 2009 2010 2011 2012 2013 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 96,770 93,472 116,840 $ (621,622) 54,074 62,766 Jan Busch Ranch WP 29.2 10,384 12,980 $ (93,200) Feb Busch Ranch WP 29.2 8,822 11,027 $ (79,178) Mar Busch Ranch WP 29.2 10,033 12,541 $ (90,052) Apr Busch Ranch WP 29.2 8,842 11,052 $ (79,361) May Busch Ranch WP 29.2 8,205 10,256 $ (73,640) Jun Busch Ranch WP 29.2 9,919 12,399 $ (89,028) Jul Busch Ranch WP 29.2 5,504 6,880 $ (49,402) Aug Busch Ranch WP 29.2 6,191 7,739 $ (55,568) Sep Busch Ranch WP 29.2 6,462 8,078 $ (58,000) Oct Busch Ranch WP 29.2 6,491 8,114 $ (58,260) Nov Busch Ranch WP 29.2 10,556 13,195 $ (94,748) Dec Busch Ranch WP 29.2 7,196 8,996 $ (64,592) Busch Ranch WP 29.2 96,770 98,604 123,255 $ (885,029) 123,255 2007 2008 2009 2010 2011 2012 2013 51,530 87,151 83,307 84,179 198,098 210,979 205,807 208,122 186,021 Note¹: The 2012- "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 2015.

Attachment A.3 Biomass Resources Period Source (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 0.00 0.00 $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.4 Biodiesel Resources Period Source (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 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.5 Biodiesel Resources Period Source (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 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

Attachment A.6 Customer Sited Solar < 10 kw Period Received Completed Average Turnaround time for Final Authorization (Business days) Average Turnaround time for interconnection review (Business days) Installed DC Watts CO Eligible RECs ¹ Total Expenditures Program Costs Rebates and REC Payments² 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 Jan 5 8 1 65 6,750 574 $ 21,948 $ 2,601 Feb 9 4 1 115 57,388 570 $ 18,095 $ - Mar 7 0 0 0 17,094 586 $ 19,602 $ - Apr 1 8 1 64 16,000 603 $ 17,725 $ 54 May 4 3 1 106 29,600 604 $ 21,788 $ - Jun 4 1 1 37 18,966 610 $ 19,803 $ - Jul 3 2 1 86 18,485 612 $ 14,643 $ 895 Aug 2 3 1 45 4,980 608 $ 5,399 $ 275 Sep 3 1 1 49-612 $ 9,697 $ - Oct 6 1 1 44 28,824 609 $ 12,722 $ 356 Nov 1 1 1 134 55,653 590 $ 19,347 $ 502 2010 Carry Forward Dec 3 4 1 68 13,904 587 $ 8,022 $ - Total 48 36 267,644 7,166 $ 188,790 $ 4,683-7,166 2011 2012 2013 2010 2011 2012 2013 Carry forward 1,809 9,604 - - 9,513 11,832 Note¹: <10 kw Solar DG RECs for 2013 and were adjusted from 7,462 and 7,698 as shown in the Monthly Renewables Reports filed in Proceeding No. 13A-0445E to 6,911 and 7,166 respectively for this Report following an internal audit of Solar DG RECs for 2013- Note²: The majority of REC Payments for Solar DG production were paid to customers and charged to the RESA in January of 2015 and therefore, are not included above. A $1,094,485 charge to the RESA for REC Payments for both <10kW and >10kW systems occured in January of 2015.

Attachment A.7 Customer Sited Solar > 10 kw Period Received Completed Average Turnaround time for Final Authorization (Business days) Average Turnaround time for interconnection review (Business days) Installed DC Watts CO Eligible RECs ¹ Total Rebates and REC Payments² 2009 2010 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 0 2010 1,050,252 4,966 $ 1,656,664 4,966 0 2011 1,681,260 8,566 $ 4,664,880 3,232 5334 0 2012 445,180 9,515 $ 984,719 0 7,593 1,922 0 2013 413,580 10,379 $ 1,557,072 0 10,379 Jan 2 0 0 0-690 $ 50,539 Feb 1 0 0 0 10,080 587 $ 27,744 Mar 1 0 0 0 10,164 756 $ 26,496 Apr 0 0 0 0-1,086 $ 41,064 May 0 0 0 0-1,035 $ 41,496 Jun 1 1 1 37-1,021 $ 46,584 Jul 5 0 0 0 10,200 1,029 $ 856 Aug 2 1 1 3 203,040 969 $ 75,048 Sep 1 1 1 43-956 $ - Oct 0 0 0 0 21,250 909 $ 40,128 Nov 0 0 0 0 65,886 638 $ 37,392 Dec 0 2 1 81 30,411 610 $ 40,537 13 5 351,031 10,287 $ 427,884 0 10,287 2011 2012 2013 Carry Forward 2009 2010 2011 2012 2013 Carry forward 1,874-8,654 5,334 7,593 1,922 20,667 Note¹: >10kW Solar DG RECs for 2013 and were adjusted from 10,071 and 10,015 as shown in the Monthly Renewables Reports filed in Proceeding No. 13A-0445E to 10,379 and 10,287 respectively for this Report following an internal audit of Solar DG RECs for 2013- Note²: The majority of REC Payments for Solar DG production were paid to customers and charged to the RESA in January of 2015 and therefore, are not included above. A $1,094,485 charge to the RESA for REC Payments for both <10kW and >10kW systems occured in January of 2015.

Attachment A.8 Customer Sited Non-Solar Retail DG Period Received Completed Average Turnaround time for rebate payment Average Turnaround time for interconnection Installed DC Watts RECs Total REC Payments 2010 2011 2013 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 Jan 359 $ 25,662 Feb 312 $ 22,307 Mar 389 $ 27,747 Apr 334 $ 23,848 May 410 $ 29,289 Jun 323 $ 23,032 Jul 229 $ 16,322 Aug 204 $ 14,599 Sep 230 $ 16,413 Oct 193 $ 13,783 Nov 231 $ 16,503 Dec 188 $ 13,420 Total - 3,402 $ 242,926 - - 3,402 2012 Carry Forward 2010 2011 2012 2013 0 0 3,752 3,715-6,083

Attachment A.9 Off Site Solar Period Received Completed Average Turnaround time for rebate payment Average Turnaround time for interconnection Installed DC Watts RECs Total REC Payments 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 $ - - - - 0 $ - - 2007 2008 2009 2010 2011 2012 2013 Carry Forward 2007 (CO eligible) 2008 (CO eligible) 2009 (CO eligible) 2010 (CO eligible) 2011 (CO eligible) 2012 (CO eligible) 2013 (CO eligible) (CO eligible) 1,109 1,824-1,746 1,810-2,511 - (2,000) - - - - - - -

Black Hills Energy Standard Adjustment Attachment A.10 Revenues Collected and Expenditures Total Total Total Total Total Total Total Total Summary 2007 2008 2009 2010 2011 2012 2013 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Revenue Collected $1,572,497 $1,595,972 $2,198,266 $3,432,290 $3,890,489 $4,882,551 $4,584,851 $385,880 $363,928 $344,671 $358,727 $329,622 $378,036 $458,891 $473,827 $442,094 $409,515 $390,470 $436,096 $4,771,758 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 93,827 65,001 84,750 87,179 90,441 92,558 95,035 92,607 95,006 97,028 96,337 95,461 1,085,230 Customer Sited Solar 119,512 174,853 152,008 192,757 216,059 206,486 224,289 19,166 18,028 18,934 17,617 21,645 19,792 11,479 5,084 7,298 7,414 17,108 7,951 171,515 Rebate/REC Payments 934,026 1,503,908 6,585,225 10,535,017 5,561,068 1,142,212 1,672,902 53,141 27,744 26,496 41,118 41,496 46,584 1,751 75,323-40,484 37,894 40,537 432,567 Non Customer Sited Solar REC's - 35,250-30,000 37,500 (7,000) - - - - - - - - - - - - - - Retail DG Wind REC's - - - - - - - - - - - - - - - - - - - - Total Expenditures $1,175,339 $1,824,968 $6,790,057 $10,776,082 $7,363,025 $2,665,394 $2,965,692 $166,133 $110,773 $130,180 $145,914 $153,582 $158,934 $108,265 $ 173,014 $102,304 $144,925 $151,340 $143,949 $1,689,312 Revenues Less Expenditures $397,158 ($228,996) ($4,591,791) ($7,343,791) $2,216,110 $1,594,255 $219,747 $253,154 $214,491 $212,814 $176,040 $219,102 $350,627 $300,813 $339,790 $264,590 $239,130 $292,148 $3,082,446 Cummulative Balance - (Under)/Over Collected ($11,508,381) ($11,255,227) ($11,040,736) ($10,827,922) ($10,651,882) ($10,432,779) ($10,082,153) ($9,781,339) ($9,441,549) ($9,176,959) ($8,937,829) $ (8,645,682) $ 3,842,768 Less ECA/RESA Adjustment from Proc Note:The Commission-approved ECA/RESA Adjustment from Docket No. 14A-0534E was booked in March 2015. This resulted in a $3,842,768 reduction to the negative RESA balance. The Commission approved this adjustment by Decision No. C15-0317. $ (1,094,485) Less Solar DG REC Payments m $ (5,897,399) 2015 Starting Balance for 2015 RES to be filed June 5, 2015 pursuant to D A.10 - Total Summary

ceeding No. 14A-0534E Booked in March 2015 made in January of 2015 S Plan in Proceeding No. 14A-0535E Decision No. R15-0459- A.10 - Total Summary

Black Hills Energy Standard Adjustment Attachment A.11 Expenditures - Common to All Programs Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Labor - - - - - - - - - - - - - - - - - - - - Labor - Contract 48,763 4,875 - - - - - - - - - - - - - - - - - - Avoided Cost Adjustments 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 5,872-54 471 419 419 1,129 2,491 Materials 91 - - 1,063 - - - - - - - - - - - - - - - - Office Expense - Printing - 5,142 1,578-1,361 2,354 - - - - - - - - - - 34 - - 34 Office Expense - Other 29 9,519 7,049 12,998 6,684 4,215 11,383 181 67 668 143 12 1,798 40 1,980 4,500 608 71 10,068 Subtotal 21,076 10,715 17,738 181 67 668 54 143 12 2,269 40 2,399 4,952 1,737 71 12,593 Interest - - - 287,712 1,527,322 1,312,902 1,050,764 93,646 64,935 84,081 87,125 90,298 92,547 92,766 92,567 92,608 92,075 94,600 95,390 1,072,638 Total Expenditures $121,801 $110,957 $52,825 $306,020 $1,548,398 $1,323,617 $1,068,502 $93,827 $65,001 $84,750 $87,179 $90,441 $92,558 $95,035 $92,607 $95,006 $97,028 $96,337 $95,461 $1,085,230 A.11 - Common Expenditures

Black Hills Energy Standard Adjustment Attachment A.12 Expenditures - Customer Sited Solar Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Labor 110,538 155,409 152,008 192,757 216,059 206,486 224,289 19,166 18,028 18,934 17,617 21,645 19,792 11,479 5,084 7,298 7,414 17,108 7,951 171,515 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 $19,166 $18,028 $18,934 $17,617 $21,645 $19,792 $11,479 $5,084 $7,298 $7,414 $17,108 $7,951 $171,515 A.12 - Customer Sited Solar

Black Hills Energy Standard Adjustment Attachment A.13 Expenditures - Program Payments Total Total Total Total Total Total Total Total Resource Description 2007 2008 2009 2010 2011 2012 2013 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 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 53,141 27,744 26,496 41,118 41,496 46,584 1,751 75,323-40,484 37,894 40,537 432,567 Retail DG Wind REC's - - - - 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 $53,141 $27,744 $26,496 $41,118 $41,496 $46,584 $1,751 $75,323 $0 $40,484 $37,894 $40,537 432,567 A.13 - Program Payments