Leland Olds Unit 2

Summary based on EPA SNCR estimate 8/3/11, Fox report 3/11, S&L report 5/09 (capital cost), and 

North Dakota BART Determination SIP Appendix B.1

2009 Dollars

Control Option

Emission 

Reductions 

(tons/yr)

Total Capital 

Investment 

($1,000)

Total Annualized 

Cost ($1,000)

Average Cost 

Effectiveness 

($/ton)

Incremental Cost 

Effectiveness 

($/ton)

North Dakota Estimate

TESCR + ASOFA* 10,821 165,800 43,830 4,178 7,723

SNCR + ASOFA 6,553 19,600 10,870 1,659

EPA Estimate 

TESCR + ASOFA (Fox Report)** 12,100 164,734 22,090 1,833 3,451

SNCR + ASOFA (EPA Analysis) 7,133 19,240 4,951 694

*Sargent & Lundy May 09 report, matches ND Appendix B.1 low end estimate for 1 year catalyst replacment

**Fox costs adjusted from 2010 dollars to 2009 dollars. Total annualized cost calculated from Fox report.
Milton R. Young Unit 1

Summary based on EPA SNCR estimate 8/3/11, ERG report 5/10/10, B&McD report 2/11/10 Table 4-4SF (capital cost), and

North Dakota BART Determination SIP Appendix B.4

2009 Dollars

Control Option

Emission 

Reductions 

(tons/yr)

Total Capital 

Investment 

($1,000)

Total Annualized 

Cost ($1,000)

Average Cost 

Effectiveness 

($/ton)

Incremental Cost 

Effectiveness 

($/ton)

North Dakota Estimate

TESCR + ASOFA 8,129 192,830 39,307 4,835 11,050

SNCR + ASOFA 5,248 8,113 7,472 1,424

EPA Estimate 

TESCR + ASOFA (ERG Report) 9,410 123,130 24,176 2,569 4,855

SNCR + ASOFA (EPA Analysis) 5,248 8,284 3,970 687
Milton R. Young Unit 2

Summary based on EPA SNCR estimate 8/3/11, ERG report 5/10/10, B&McD report 11/09 Table 4-4SF (capital cost), and 

North Dakota BART Determination SIP Appendix B.4

2009 Dollars

Control Option

Emission 

Reductions 

(tons/yr)

Total Capital 

Investment 

($1,000)

Total Annualized 

Cost ($1,000)

Average Cost 

Effectiveness 

($/ton)

Incremental Cost 

Effectiveness 

($/ton)

North Dakota Estimate

TESCR + ASOFA 13,956 329,150 66,506 4,765 11,105

SNCR + ASOFA 8,994 17,128 11,405 1,268

EPA Estimate 

TESCR + ASOFA (ERG Report) 14,807 216,870 40,570 2,740 6,045

SNCR + ASOFA (EPA Analysis) 9,162 17,456 6,444 703
Coal Creek Unit 1 (used Unit 1 analysis for both Units 1 and 2)

Summary based on EPA SCR and SNCR estimates 8/5/11, and GRE corrected cost information 7/15/11, and

North Dakota BART Determination SIP Appendix B.2

2009 Dollars

Control Option

Emission 

Reductions 

(tons/yr)

Total Capital 

Investment 

($1,000)

Total Annualized 

Cost ($1,000)

Average Cost 

Effectiveness 

($/ton)

Incremental Cost 

Effectiveness 

($/ton)

North Dakota Estimate

LTO (Company Analysis) 1,530 44,320 44,780 29,268

LDSCR + SOFA + LNB 1,530 84,110 12,490 8,163 9,068

SNCR + SOFA + LNB 2,678 19,910 22,900 8,551 21,102

SOFA + LNB 1,607 300 838

Great River Energy Estimate

LTO (Company Analysis) LTO (Company Analysis) 5,015 44,320 58,210 11,608

LDSCR + SOFA + LNB 4,458 70,440 44,810 10,051 21,471

SNCR + SOFA + LNB 2,786 12,720 8,910 3,198 8,184

SOFA + LNB 1,773 4,910 620 350

EPA Estimate 

LTO (Company Analysis) 5,015 44,320 58,210 11,608

LDSCR + SOFA + LNB (EPA Analysis) 4,210 65,153 17,328 4,116 6,653

SNCR + SOFA + LNB (EPA Analysis) 2,572 10,287 6,430 2,500 5,441

SOFA + LNB 1,514 4,913 673 445