Cholla units 2, 3, and 4

Table 2. Control Options (per EPA Region 9) and Corresponding Emission Reductions Relative to Base Used in Visibility Modeling 

All Units All Units

Controls

Technology 

Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

-Emissions 

(TPY, annual 

av) $/year

Pre-LNB SOFA Base Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 0 $0

Pre-LNB SNCR Ctrl-1 PreLNB SNCR 929 PreLNB SNCR 871 PreLNB SNCR 1082 2882 $8,564,847

Pre-LNB SCR Ctrl-2 PreLNB SCR 2606 PreLNB SCR 2332 PreLNB SCR 2913 7851 $27,858,991

Pre-LNB SNCR u.4 Ctrl-3 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SNCR 1082 1082 $3,284,409

Pre-LNB SCR u.4 Ctrl-4 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SCR 2913 2913 $10,781,102

Pre-LNB SNCR u.3 Ctrl-5 Pre-LNB + SOFA 0 PreLNB SNCR 871 Pre-LNB + SOFA 0 871 $2,607,329

Pre-LNB SCR u.3 Ctrl-6 Pre-LNB + SOFA 0 PreLNB SCR 2332 Pre-LNB + SOFA 0 2332 $8,842,201

Pre-LNB; SO2cor Basecorr Pre-LNB+SO2corr 0 PreLNB + SO2c 0 PreLNB + SO2c 0 0 $0

Pre-LNB SCR SO2c CTRL2 PreLNB SCR SO2c 2606 PreLNB SCR SO2c 2332 PreLNB SCR SO2c 2913 7851 $27,858,991

Post-LNB SO2cor Rev Base Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 0 $0

Post-LNB SNCR SO2cCTRL1_R PostLNB SNCR SO2c 867 PostLNB SNCR SO2c 871 PostLNB SNCR SO2c 1082 2820 $8,436,045

PoLN SCR 84%CE, SO2c CTRL2_R PostLNB SCR 84% CE;SO2c2428 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7673 $27,741,193

PoLN SCR 83%CE, SO2c ctrl2-r2 PostLNB SCR 83% CE;SO2c2400 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7645 $27,736,569

Table 3(a). Original NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 5/29/12 Table 3(b). Updated NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version6/19/12

SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR

Capacity Factor 74% 74% 75% 75% 72% 72% Capacity Factor 74% 74% 75% 75% 72% 72%

Control Efficiency 30% 84% 30% 80% 30% 81% Control Efficiency 30% 83%* 30% 80% 30% 81% *Addt'l 1% CE on Unit 2 SCR

Uncontrolled Rate Uncontrolled Rate

NOx Rate (lb/hr) 955 955 884 884 1144 1144 NOx Rate (lb/hr) 892 892 884 884 1144 1144

NOx Rate (lb/MMBtu) 0.32 0.32 0.25 0.25 0.26 0.26 NOx Rate (lb/MMBtu) 0.295 0.295 0.25 0.25 0.26 0.26

NOx (TPY) 3096 3096 2904 2904 3607 3607 NOx (TPY) 2890 2890 2904 2904 3607 3607

Controlled Rate Controlled Rate

NOx Rate (lb/hr) 669 151 619 174 801 220 NOx Rate (lb/hr) 624 151 619 174 801 220

NOx Rate (lb/MMBtu) 0.22 0.05 0.18 0.05 0.18 0.05 NOx Rate (lb/MMBtu) 0.21 0.05 0.18 0.05 0.18 0.05

NOx (TPY) 2167 490 2033 572 2525 694 NOx (TPY) 2023 490 2033 572 2525 694

Tons/Year Removed 929 2606 871 2332 1082 2913 Tons/Year Removed 867 2400 871 2332 1082 2913

Total Cost, $/year $2,673,109 $8,235,688 $2,607,329 $8,842,201 $3,284,409 $10,781,102 Total Cost, $/year $2,544,307 $8,113,266 $2,607,329 $8,842,201 $3,284,409 $10,781,102 $8,117,890 per ATP 6/23/12

$/Ton $2,878 $3,160 $2,993 $3,792 $3,035 $3,700 $/Ton $2,935 $3,308 $2,993 $3,792 $3,035 $3,700 

$/Ton (incremental) $2,878 $3,317 $2,993 $4,268 $3,035 $4,094 $/Ton (incremental) $2,935 $3,632 $2,993 $4,268 $3,035 $4,094 

Cholla units 2, 3, and 4 draft UNC results, 2012-04-30

visibility method 6, annual average background

Using dv from area with highest impact (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv

dv/TPY 

(x 1000) 

$/dv 

(millions)

# areas w/ 

improvement 

≥ 0.5 dv

Pre-LNB SOFA Base 0 $0.0 4.6

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 4.3 0.39 0.135 $22 0

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 3.8 0.83 0.105 $34 5

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 4.5 0.12 0.113 $27 0

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 4.3 0.38 0.130 $28 0

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 4.5 0.11 0.123 $24 0

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 4.4 0.29 0.126 $30 0

Pre-LNB; SO2cor Basecorr 0 $0.0 4.0

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 2.7 1.24 0.158 $22 7

Post-LNB SO2cor Rev Base 0 $0.0 3.7

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 3.3 0.36 0.127 $24 0

PoLN SCR 84%CE, SO2cCTRL2_R 7673 $27.7 $3,616 2.7 1.04 0.135 $27 4

PoLN SCR 83%CE, SO2cCtrl2-r2 7645 $27.7 $3,628 2.7 1.03 0.135 $27 4

(same tons & costs as above) Using dv sum over all areas (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv

dv/TPY 

(x 1000)

$/dv 

(millions)

Pre-LNB SOFA Base 0 $0.0 24.3

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 22.0 2.31 0.800 $3.7

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 18.4 5.85 0.745 $4.8

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 23.3 0.93 0.858 $3.5

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 22.0 2.31 0.792 $4.7

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 23.5 0.76 0.877 $3.4

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 22.4 1.91 0.819 $4.6

Pre-LNB; SO2cor Basecorr 0 $0.0 16.8

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 9.8 7.01 0.893 $4.0

Post-LNB SO2cor Rev Base 0 $0.0 15.1

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 13.0 2.07 0.734 $4.1

PoLN SCR 84%CE, SO2cCTRL2_R 7673 $27.7 $3,616 9.5 5.65 0.736 $4.9

PoLN SCR 83%CE, SO2cCtrl2-r2 7645 $27.7 $3,628 9.5 5.62 0.735 $4.9

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx

Control 

Option

Unit 2 Unit 3 Unit 4

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx
Cholla units 2, 3, and 4

visibility method 6, annual average background (this page edited from vis6.annav sheet)

Table 1(a). Visibility Impairment (98th Percentile) for 2001-2003 Base Case Emissions and Control Options

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base Ctrl1_R

CIA Class I Area Pre-LNB 

SOFA

Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

Post-LNB 

SO2cor

Post-LNB 

SNCR 

SO2c

care Capitol Reef 1.83 1.52 1.16 1.71 1.52 1.74 1.58 1.31 0.59 1.16 0.97

gali Galiuro 0.79 0.71 0.66 0.74 0.71 0.75 0.72 0.44 0.29 0.42 0.36

gila Gila 1.28 1.25 1.06 1.27 1.25 1.27 1.26 0.62 0.43 0.55 0.48

grca Grand Canyon 2.67 2.28 1.84 2.55 2.29 2.56 2.37 1.94 0.96 1.73 1.45

maza Mazatzal 1.88 1.73 1.46 1.80 1.73 1.82 1.73 1.18 0.72 1.07 0.91

meve Mesa Verde 1.48 1.27 0.99 1.39 1.27 1.41 1.32 1.06 0.49 0.92 0.75

moba Mount Baldy 1.61 1.49 1.27 1.59 1.49 1.59 1.53 1.06 0.57 0.90 0.77

pefo Petrified Forest 4.57 4.35 3.80 4.45 4.35 4.47 4.35 3.96 2.72 3.70 3.34

pimo Pine Mountain 1.45 1.34 1.14 1.38 1.34 1.39 1.34 0.84 0.51 0.76 0.66

sagu Saguaro 0.71 0.65 0.56 0.68 0.65 0.69 0.65 0.32 0.24 0.30 0.28

sian Sierra Ancha 2.11 1.84 1.58 2.02 1.84 2.01 1.84 1.35 0.79 1.21 1.07

supe Superstition 1.94 1.81 1.50 1.90 1.81 1.91 1.85 1.30 0.75 1.18 1.01

syca Sycamore Canyon 1.97 1.74 1.41 1.88 1.74 1.90 1.82 1.39 0.67 1.21 0.98

Total 24.28 21.97 18.43 23.35 21.97 23.51 22.37 16.76 9.75 15.10 13.03

Max 4.57 4.35 3.80 4.45 4.35 4.47 4.35 3.96 2.72 3.70 3.34

# CIAs w. -dv >0.5 13 13 13 13 13 13 13 11 9 11 10

Table 4(a). Control Option Visibility Benefits (dv/thousand TPY)*

Class I Area Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 0.107 0.085 0.109 0.107 0.104 0.105 0.091 0.070 0.079 0.079

gali Galiuro 0.028 0.017 0.043 0.028 0.041 0.032 0.019 0.019 0.017 0.017

gila Gila 0.010 0.028 0.009 0.011 0.011 0.008 0.025 0.023 0.017 0.017

grca Grand Canyon 0.135 0.105 0.113 0.130 0.123 0.126 0.125 0.099 0.105 0.105

maza Mazatzal 0.052 0.054 0.070 0.051 0.063 0.062 0.058 0.056 0.047 0.047

meve Mesa Verde 0.072 0.062 0.080 0.072 0.072 0.068 0.072 0.059 0.060 0.060

moba Mount Baldy 0.043 0.044 0.019 0.043 0.023 0.033 0.062 0.046 0.045 0.045

pefo Petrified Forest 0.077 0.098 0.108 0.076 0.115 0.094 0.158 0.127 0.135 0.135

98th Percentile -dv

pefo Petrified Forest 0.077 0.098 0.108 0.076 0.115 0.094 0.158 0.127 0.135 0.135

pimo Pine Mountain 0.036 0.039 0.058 0.035 0.059 0.043 0.042 0.037 0.032 0.033

sagu Saguaro 0.022 0.019 0.034 0.022 0.032 0.026 0.009 0.005 0.007 0.007

sian Sierra Ancha 0.096 0.068 0.086 0.095 0.114 0.118 0.071 0.050 0.057 0.057

supe Superstition 0.043 0.055 0.040 0.044 0.037 0.037 0.070 0.061 0.060 0.060

syca Sycamore Canyon 0.078 0.071 0.088 0.078 0.083 0.066 0.092 0.082 0.074 0.074

Average 0.062 0.057 0.066 0.061 0.067 0.063 0.069 0.056 0.057 0.057

dv_sum/TPY 0.800 0.745 0.858 0.792 0.877 0.819 0.893 0.734 0.736 0.735

dv_max/TPY 0.135 0.105 0.113 0.130 0.123 0.126 0.158 0.127 0.135 0.135

*Uses the formula: dv/thousand TPY = 1000 * (dv change relative to base) / (TPY reduction relative to base)

Table 5(a). Control Option Cost Effectiveness (million $/dv)†

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 28 42 28 35 29 36 39 43 46 46

gali Galiuro 104 211 71 133 72 119 190 156 217 217

gila Gila 306 128 328 348 261 491 144 128 209 212

grca Grand Canyon 22 34 27 28 24 30 28 30 34 34

maza Mazatzal 57 66 43 72 47 61 61 53 77 78

meve Mesa Verde 41 57 38 51 41 56 49 51 60 61

moba Mount Baldy 69 81 156 86 130 113 57 65 80 80

pefo Petrified Forest 39 36 28 49 26 40 22 24 27 27

pimo Pine Mountain 83 91 52 105 51 88 85 80 111 111

sagu Saguaro 134 183 89 168 93 145 387 649 504 504

sian Sierra Ancha 31 52 35 39 N/A 32 50 60 64 64

supe Superstition 69 64 76 84 81 102 51 49 60 60

syca Sycamore Canyon 38 50 35 47 36 57 39 37 49 49

$/dv_sum 3.7 4.8 3.5 4.7 3.4 4.6 4.0 4.1 4.9 4.9

$/dv_max 22.0 33.8 26.9 28.4 24.4 30.1 22.5 23.6 26.8 26.9

Class I Area
†$/dv = $ per year from Table 3 divided by delta dv from Table 1(a) for each control option, in millions
Ctrl2_R ctrl2-r2 Basecorr Rev Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB; 

SO2cor 

Post-LNB 

SO2cor

Pre-LNB 

SNCR Pre-LNB SCR

Pre-LNB 

SNCR u.4

Pre-LNB SCR 

u.4

Pre-LNB 

SNCR u.3

Pre-LNB SCR 

u.3

Pre-LNB SCR 

SO2c

Post-LNB 

SNCR SO2c

0.56 0.56 0.00 0.00 0.31 0.67 0.12 0.31 0.09 0.24 0.71 0.20

0.29 0.29 0.00 0.00 0.08 0.13 0.05 0.08 0.04 0.07 0.15 0.05

0.41 0.42 0.00 0.00 0.03 0.22 0.01 0.03 0.01 0.02 0.19 0.07

0.92 0.92 0.00 0.00 0.39 0.83 0.12 0.38 0.11 0.29 0.98 0.28

0.71 0.71 0.00 0.00 0.15 0.42 0.08 0.15 0.05 0.15 0.46 0.16

0.46 0.46 0.00 0.00 0.21 0.49 0.09 0.21 0.06 0.16 0.57 0.17

0.56 0.56 0.00 0.00 0.12 0.34 0.02 0.13 0.02 0.08 0.49 0.13

2.67 2.67 0.00 0.00 0.22 0.77 0.12 0.22 0.10 0.22 1.24 0.36

0.51 0.51 0.00 0.00 0.10 0.31 0.06 0.10 0.05 0.10 0.33 0.11

0.24 0.24 0.00 0.00 0.06 0.15 0.04 0.06 0.03 0.06 0.07 0.01

0.77 0.78 0.00 0.00 0.28 0.53 0.09 0.28 0.10 0.28 0.56 0.14

0.72 0.72 0.00 0.00 0.13 0.43 0.04 0.13 0.03 0.09 0.55 0.17

0.64 0.64 0.00 0.00 0.23 0.56 0.10 0.23 0.07 0.16 0.72 0.23

9.45 9.48 2.31 5.85 0.93 2.31 0.76 1.91 7.01 2.07

2.67 2.67 0.39 0.83 0.12 0.38 0.11 0.29 1.24 0.36

9 9 0 5 0 0 0 0 7 0

Number of Class I Areas with visibility improvement ≥ 0.5 dv

 Change relative to base (dv)

3.00

3.50

4.00

4.50

Cholla: 98th Percentile Visibility 

average of all area's (dv/annual TPY)

(sum of dv benefits over all areas) / (annual TPY)

(max dv benefit of any area) / (annual TPY)

($/yr) / (sum of dv benefits over all areas)

($/yr) / (max dv benefit of any area)

Capitol Reef Galiuro Gila Grand 

Canyon

Basecorr Pre-LNB; SO2cor 1.31 0.44 0.62 1.94

CTRL2 Pre-LNB SCR SO2c 0.59 0.29 0.43 0.96

Rev Base Post-LNB SO2cor 1.16 0.42 0.55 1.73

Ctrl1_R Post-LNB SNCR SO2c 0.97 0.36 0.48 1.45

Ctrl2_R PoLN SCR 84%CE, SO2c 0.56 0.29 0.41 0.92

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.56 0.29 0.42 0.92

0.00

0.50

1.00

1.50

2.00

2.50

3.00

Visibility Impairment (-dv)

Ctrl2_R ctrl2-r2

PoLN SCR 

84%CE, SO2c

PoLN SCR 

83%CE, SO2c

0.61 0.60

0.13 0.13

0.13 0.13

0.81 0.81

0.36 0.36

0.46 0.46

0.35 0.35

1.04 1.03

0.25 0.25

0.06 0.06

0.44 0.43

0.46 0.46

0.57 0.57

5.65 5.62

1.04 1.03

4 4

: 98th Percentile Visibility Impairment, IMPROVE Method 6, Ann. Avg. Bkgd.

1.00

1.20

1.40

Cholla: Visibility Benefit o

Grand 

Canyon Mazatzal Mesa Verde Mount Baldy Petrified Forest

Pine 

Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

1.94 1.18 1.06 1.06 3.96 0.84 0.32 1.35 1.30 1.39

0.96 0.72 0.49 0.57 2.72 0.51 0.24 0.79 0.75 0.67

1.73 1.07 0.92 0.90 3.70 0.76 0.30 1.21 1.18 1.21

1.45 0.91 0.75 0.77 3.34 0.66 0.28 1.07 1.01 0.98

0.92 0.71 0.46 0.56 2.67 0.51 0.24 0.77 0.72 0.64

0.92 0.71 0.46 0.56 2.67 0.51 0.24 0.78 0.72 0.64

Capitol 

Reef

Basecorr Pre-LNB; SO2cor 0.00

CTRL2 Pre-LNB SCR SO2c 0.71

Rev Base Post-LNB SO2cor 0.00

Ctrl1_R Post-LNB SNCR SO2c 0.20

Ctrl2_R PoLN SCR 84%CE, SO2c 0.61

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.60

0.00

0.20

0.40

0.60

0.80

Visibility Benefit, dv

Cholla: Visibility Benefit of Controls, IMPROVE Method 6, Ann. Avg. Bkgd.

Galiuro Gila Grand 

Canyon Mazatzal Mesa Verde

Mount 

Baldy 

Petrified 

Forest

Pine 

Mountain Saguaro Sierra Ancha 

Superstitio

n 

Sycamore 

Canyon 

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.15 0.19 0.98 0.46 0.57 0.49 1.24 0.33 0.07 0.56 0.55 0.72

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.05 0.07 0.28 0.16 0.17 0.13 0.36 0.11 0.01 0.14 0.17 0.23

0.13 0.13 0.81 0.36 0.46 0.35 1.04 0.25 0.06 0.44 0.46 0.57

0.13 0.13 0.81 0.36 0.46 0.35 1.03 0.25 0.06 0.43 0.46 0.57
Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6

care 1.764 1.517 1.162 1.673 1.509 1.692 1.569

gali 0.982 0.978 0.917 0.981 0.980 0.979 0.979

gila 0.986 0.918 0.863 0.960 0.917 0.968 0.935

grca 3.796 3.491 2.677 3.691 3.490 3.715 3.567

maza 1.706 1.530 1.214 1.640 1.529 1.654 1.568

meve 1.089 0.952 0.835 1.020 0.946 1.048 0.995

moba 1.635 1.410 1.097 1.554 1.407 1.560 1.428

pefo 4.569 4.237 3.796 4.446 4.223 4.469 4.293

pimo 1.229 1.082 0.929 1.175 1.083 1.183 1.106

sagu 0.898 0.840 0.653 0.898 0.840 0.898 0.856

sian 1.875 1.827 1.679 1.836 1.822 1.836 1.835

supe 1.953 1.832 1.482 1.940 1.833 1.948 1.862

syca 1.850 1.672 1.358 1.754 1.671 1.773 1.676

Total 24.332 22.286 18.662 23.568 22.250 23.723 22.669

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 0.086 0.077 0.084 0.088 0.083 0.084 0.026

gali 0.001 0.008 0.001 0.001 0.003 0.001 0.006

gila 0.024 0.016 0.024 0.024 0.021 0.022 0.008

grca 0.106 0.143 0.097 0.105 0.093 0.098 0.057

maza 0.061 0.063 0.061 0.061 0.060 0.059 0.016

meve 0.048 0.032 0.064 0.049 0.047 0.040 0.018

moba 0.078 0.069 0.075 0.078 0.086 0.089 0.029

pefo 0.115 0.098 0.114 0.119 0.115 0.118 0.038

pimo 0.051 0.038 0.050 0.050 0.053 0.053 0.014

sagu 0.020 0.031 0.000 0.020 0.000 0.018 0.000

sian 0.017 0.025 0.036 0.018 0.045 0.017 0.027

supe 0.042 0.060 0.012 0.041 0.006 0.039 0.023

syca 0.062 0.063 0.089 0.061 0.088 0.075 0.029

Average 0.055 0.056 0.054 0.055 0.054 0.055 0.022

dv_max/TPY 0.12 0.14 0.11 0.12 0.11 0.12 0.21

dv_sum/TPY 0.71 0.72 0.71 0.71 0.70 0.71 1.02

*Uses the formula: dv/thousand TPY ≡ dv change relative to base at CIA/TPY reduction relative to base

98th Percentile 

Table 4(a). Control Option Visibility Benefits (dv/thousand TPY)* for Each Class I Area Within APS Cholla's Zone of Influenc

Table 1(a). Visibility Impairment (98th Percentile) at Each Class I Area (CIA) Within APS Cholla's Zone of Influence (300 km) 

CIA

CIA

2001
Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 35 46 36 42 36 45 39

gali 2141 429 3284 5391 869 2947 218

gila 126 226 126 156 145 173 113

grca 28 25 31 35 32 39 17

maza 49 57 50 61 50 64 58

meve 63 110 48 75 64 94 63

moba 38 52 41 47 35 43 43

pefo 26 36 27 31 26 32 23

pimo 58 93 61 74 57 72 75

sagu 148 114 #N/A 186 #N/A 211 376

sian 178 142 84 203 67 221 39

supe 71 59 253 90 521 97 49

syca 48 57 34 60 34 51 37

†million $/dv = $ per year in millions from Table 3 divided by dv benefit from Table 1(a) for each control option.

2001

CIA

Table 5(a). Control Option Cost Effectivenessin million ($/ dv)† for Each Class I Area Within APS Cholla's Zone of Influence 
 Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2

1.242 0.526 1.089 0.888 0.507 0.507 0.247 0.602

0.471 0.343 0.443 0.395 0.342 0.342 0.004 0.065

0.569 0.322 0.51 0.448 0.313 0.314 0.068 0.123

3.206 1.562 2.902 2.452 1.492 1.497 0.305 1.119

1.175 0.691 1.077 0.953 0.671 0.672 0.176 0.492

0.783 0.343 0.681 0.543 0.329 0.33 0.137 0.254

1.225 0.571 1.052 0.827 0.543 0.544 0.225 0.538

3.967 2.763 3.746 3.447 2.704 2.708 0.332 0.773

0.823 0.451 0.736 0.625 0.432 0.434 0.147 0.300

0.369 0.295 0.346 0.344 0.288 0.29 0.058 0.245

1.458 0.752 1.277 1.067 0.73 0.731 0.048 0.196

1.398 0.826 1.245 1.066 0.818 0.818 0.121 0.471

1.399 0.642 1.227 1.003 0.64 0.64 0.178 0.492

18.085 10.087 16.331 14.058 9.809 9.827 2.046 5.670

CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

0.254 0.076 0.076 0.058 0.032 0.055 0.056 0.059

0.045 0.013 0.013 0.000 0.022 0.000 0.000 0.000

0.088 0.026 0.026 0.014 0.007 0.031 0.014 0.033

0.583 0.184 0.184 0.145 0.113 0.139 0.140 0.139

0.172 0.053 0.053 0.043 0.047 0.059 0.043 0.068

0.156 0.046 0.046 0.067 0.071 0.080 0.065 0.054

0.232 0.066 0.066 0.018 0.017 0.043 0.018 0.053

0.427 0.136 0.136 0.113 0.111 0.082 0.113 0.077

0.132 0.040 0.040 0.024 0.037 0.040 0.023 0.038

0.026 0.008 0.007 0.015 0.019 0.000 0.015 0.000

0.250 0.071 0.071 0.039 0.073 0.005 0.043 0.005

0.203 0.056 0.056 0.033 0.065 0.013 0.032 0.013

0.268 0.077 0.077 0.056 0.080 0.104 0.056 0.103

0.218 0.065 0.065 0.048 0.053 0.050 0.047 0.049

0.16 0.18 0.18 0.15 0.11 0.14 0.14 0.14

0.81 0.85 0.85 0.63 0.69 0.65 0.62 0.64

A/TPY reduction relative to base

-dv

Within APS Cholla's Zone of Influence (300 km) for 2001-2003 

2001

Cholla's Zone of Influence (300 km) for 2001-2003 Base Case Emissions and Control Options (listed in Table 2)

2002
2002

CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

42 48 48 51 111 55 66 51

176 275 275 8565 161 #N/A 10781 #N/A

136 141 142 209 516 97 263 90

19 20 20 20 31 22 26 22

68 68 68 69 76 51 86 44

61 79 79 44 50 38 57 55

37 55 55 168 214 71 211 57

28 27 27 26 32 37 33 39

76 91 92 126 96 76 159 79

4218 478 495 199 188 #N/A 251 #N/A

40 51 51 76 49 657 87 652

47 65 65 90 54 235 115 237

38 47 47 53 44 29 67 29

le 1(a) for each control option.

thin APS Cholla's Zone of Influence (300 km) for 2001-2003 
Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

0.091 0.255 0.072 0.195 0.716 0.201 0.582 0.582

0.001 0.002 0.003 0.003 0.128 0.048 0.101 0.101

0.026 0.069 0.018 0.051 0.247 0.062 0.197 0.196

0.105 0.306 0.081 0.229 1.644 0.450 1.410 1.405

0.066 0.177 0.052 0.138 0.484 0.124 0.406 0.405

0.069 0.143 0.041 0.094 0.440 0.138 0.352 0.351

0.081 0.228 0.075 0.207 0.654 0.225 0.509 0.508

0.123 0.346 0.100 0.276 1.204 0.299 1.042 1.038

0.054 0.146 0.046 0.123 0.372 0.111 0.304 0.302

0.000 0.058 0.000 0.042 0.074 0.002 0.058 0.056

0.039 0.053 0.039 0.040 0.706 0.210 0.547 0.546

0.013 0.120 0.005 0.091 0.572 0.179 0.427 0.427

0.096 0.179 0.077 0.174 0.757 0.224 0.587 0.587

0.764 2.082 0.609 1.663 7.998 2.273 6.522 6.504

Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.058 0.018 0.171 0.050 0.050 0.133 0.091 0.140

0.000 0.005 0.044 0.010 0.010 0.013 0.011 0.027

0.018 0.010 0.075 0.017 0.017 0.061 0.039 0.061

0.138 0.033 0.334 0.104 0.104 0.038 0.045 0.020

0.051 0.021 0.182 0.052 0.052 0.009 0.030 0.017

0.051 0.022 0.197 0.059 0.059 0.094 0.077 0.091

0.021 0.020 0.180 0.052 0.052 0.007 0.043 0.004

0.111 0.044 0.366 0.113 0.113 0.164 0.107 0.140

0.029 0.018 0.163 0.048 0.048 0.004 0.027 0.006

0.008 0.000 0.029 0.007 0.007 0.009 0.005 0.006

0.019 0.023 0.215 0.065 0.065 0.064 0.049 0.076

0.030 0.021 0.205 0.061 0.061 0.031 0.023 0.062

0.069 0.027 0.247 0.075 0.075 0.027 0.041 0.028

0.046 0.020 0.185 0.055 0.055 0.050 0.045 0.052

0.14 0.13 0.12 0.11 0.11 0.16 0.11 0.14

0.60 0.86 0.73 0.71 0.71 0.65 0.59 0.68

 Change relative to base (-dv)

2002
2003

Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

65 58 59 72 72 22 39 22

#N/A 225 206 360 360 225 310 113

216 132 111 209 209 49 91 50

27 30 32 35 35 78 78 149

74 54 50 70 70 343 119 182

74 50 49 61 62 32 46 33

180 55 53 70 70 408 82 821

34 27 24 32 32 18 33 22

130 61 60 76 76 714 131 469

491 344 8436 495 504 329 733 547

201 46 48 56 56 46 72 40

128 48 51 60 60 97 154 49

55 40 40 48 49 108 87 109
Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr

1.161 0.993 0.909 1.101 0.998 1.110 1.026 0.819

0.858 0.857 0.685 0.858 0.857 0.858 0.858 0.406

1.318 1.277 1.264 1.284 1.277 1.289 1.277 0.644

2.696 2.278 1.809 2.546 2.289 2.575 2.374 1.846

1.886 1.762 1.519 1.822 1.761 1.827 1.766 1.192

1.534 1.341 0.980 1.447 1.344 1.487 1.415 1.06

1.499 1.448 1.369 1.453 1.448 1.453 1.450 1.055

4.285 3.960 3.416 4.196 3.956 4.218 4.026 3.547

1.591 1.523 1.302 1.548 1.523 1.558 1.523 1.02

0.657 0.614 0.509 0.657 0.614 0.657 0.639 0.278

2.115 2.002 1.544 2.110 1.991 2.111 2.071 1.404

2.037 1.942 1.525 2.023 1.943 2.026 1.968 1.338

2.351 2.189 1.721 2.238 2.189 2.261 2.190 1.51

23.988 22.186 18.552 23.283 22.190 23.430 22.583 16.119

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

0.132 0.122 0.123 0.032 0.343 0.104 0.104 0.107

0.013 0.025 0.016 0.009 0.067 0.022 0.022 0.028

0.061 0.056 0.056 0.006 0.089 0.024 0.024 0.010

0.034 0.015 0.054 0.023 0.215 0.063 0.064 0.135

0.009 0.018 0.009 0.016 0.139 0.042 0.042 0.052

0.093 0.091 0.090 0.026 0.249 0.075 0.075 0.072

0.007 0.003 0.008 0.012 0.084 0.019 0.019 0.043

0.152 0.196 0.212 0.045 0.473 0.138 0.137 0.077

0.004 0.007 0.008 0.011 0.048 0.017 0.017 0.036

0.009 0.007 0.006 0.005 0.044 0.013 0.013 0.022

0.064 0.067 0.063 0.015 0.138 0.049 0.049 0.096

0.030 0.067 0.035 0.013 0.102 0.031 0.032 0.043

0.027 0.028 0.026 0.021 0.148 0.039 0.040 0.078

0.049 0.054 0.054 0.018 0.165 0.049 0.049 0.062

0.15 0.20 0.21 0.17 0.13 0.14 0.14 0.14

0.64 0.70 0.71 0.77 0.65 0.64 0.64 0.80

2003

98th Percentile D-dv
All Years

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

28 25 31 29 33 35 35 28

284 119 239 147 122 165 166 104

60 53 68 111 187 152 153 306

109 201 71 46 47 57 57 22

431 163 421 71 67 86 87 57

40 33 42 40 41 48 48 41

513 869 465 118 86 191 193 69

24 15 18 21 24 26 26 39

829 435 465 205 100 217 217 83

399 435 589 226 228 283 286 134

58 45 60 71 71 74 74 31

123 45 109 96 83 115 115 69

136 109 147 67 51 92 92 38
CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.338 0.708 0.565 0.322 0.323 0.168 0.252 0.060

0.282 0.359 0.318 0.282 0.282 0.001 0.173 0.000

0.433 0.566 0.49 0.433 0.433 0.041 0.054 0.034

0.903 1.642 1.38 0.845 0.85 0.418 0.887 0.150

0.679 1.067 0.899 0.668 0.668 0.124 0.367 0.064

0.505 0.928 0.756 0.475 0.477 0.193 0.554 0.087

0.548 0.933 0.774 0.534 0.535 0.051 0.130 0.046

2.514 3.341 2.995 2.475 2.478 0.325 0.869 0.089

0.561 0.913 0.773 0.547 0.548 0.068 0.289 0.043

0.197 0.241 0.24 0.185 0.186 0.043 0.148 0.000

0.798 1.27 1.093 0.774 0.775 0.113 0.571 0.005

0.761 1.216 1.052 0.751 0.753 0.095 0.512 0.014

0.814 1.361 1.151 0.788 0.791 0.162 0.630 0.113

9.333 14.545 12.486 9.079 9.099 1.802 5.436 0.705

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

0.085 0.109 0.107 0.104 0.105 0.025 0.253 0.079

0.017 0.043 0.028 0.041 0.032 0.007 0.052 0.017

0.028 0.009 0.011 0.011 0.008 0.008 0.069 0.017

0.105 0.113 0.130 0.123 0.126 0.036 0.347 0.105

0.054 0.070 0.051 0.063 0.062 0.020 0.162 0.047

0.062 0.080 0.072 0.072 0.068 0.021 0.201 0.060

0.044 0.019 0.043 0.023 0.033 0.016 0.172 0.045

0.098 0.108 0.076 0.115 0.094 0.046 0.440 0.135

0.039 0.058 0.035 0.059 0.043 0.013 0.116 0.032

0.019 0.034 0.022 0.032 0.026 0.002 0.026 0.007

0.068 0.086 0.095 0.114 0.118 0.018 0.198 0.057

0.055 0.040 0.044 0.037 0.037 0.022 0.195 0.060

0.071 0.088 0.078 0.083 0.066 0.029 0.255 0.074

0.057 0.066 0.061 0.067 0.063 0.020 0.191 0.057

0.11 0.11 0.13 0.12 0.13 0.16 0.13 0.14

0.75 0.86 0.79 0.88 0.82 0.89 0.73 0.74

All Years

2002
Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

42 28 35 29 36 39 43 46

211 71 133 246 376 57 514 67

128 328 348 884 1548 43 420 64

34 27 28 83 95 9 99 11

66 43 72 161 192 18 174 24

57 38 51 140 175 15 168 19

81 156 86 442 357 17 215 25

36 28 49 88 127 7 77 8

91 52 105 173 276 26 264 34

183 89 168 316 457 117 2134 156

52 35 39 89 101 15 198 20

64 76 84 276 320 15 162 19

50 35 47 36 57 39 37 49
Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base

0.163 0.051 0.135 0.481 0.143 0.386 0.385 2.228

0.001 0.000 0.000 0.124 0.041 0.077 0.077 0.681

0.041 0.029 0.041 0.211 0.076 0.133 0.133 1.300

0.407 0.121 0.322 0.943 0.262 0.797 0.792 1.872

0.125 0.059 0.120 0.513 0.168 0.399 0.399 1.753

0.190 0.047 0.119 0.555 0.172 0.453 0.451 1.766

0.051 0.046 0.049 0.507 0.159 0.399 0.398 1.608

0.329 0.067 0.259 1.033 0.346 0.866 0.863 5.059

0.068 0.033 0.068 0.459 0.140 0.366 0.365 1.352

0.043 0.000 0.018 0.081 0.001 0.056 0.055 0.459

0.124 0.004 0.044 0.606 0.177 0.496 0.495 1.779

0.094 0.011 0.069 0.577 0.164 0.465 0.463 1.506

0.162 0.090 0.161 0.696 0.210 0.573 0.570 1.562

1.798 0.558 1.405 6.786 2.059 5.466 5.446 22.925

ctrl2_r2

0.079

0.017

0.017

0.105

0.047

0.060

0.045

0.135

0.033

0.007

0.057

0.060

0.074

0.057

0.13

0.74

 Change relative to base (-dv)
ctrl2_r2

46

217

212

34

78

61

80

27

111

504

64

60

49
Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr

1.844 1.510 2.077 1.844 2.122 1.942 1.641

0.643 0.591 0.652 0.643 0.659 0.644 0.413

1.125 0.993 1.234 1.121 1.251 1.170 0.679

1.762 1.517 1.850 1.773 1.859 1.747 1.327

1.728 1.518 1.735 1.728 1.737 1.732 1.132

1.496 1.161 1.667 1.495 1.687 1.556 1.304

1.587 1.268 1.604 1.587 1.605 1.589 0.793

4.585 4.217 4.907 4.616 4.888 4.564 4.184

1.340 1.139 1.345 1.339 1.346 1.333 0.61

0.433 0.421 0.453 0.432 0.453 0.444 0.281

1.594 1.391 1.697 1.593 1.721 1.632 1.133

1.418 1.325 1.439 1.418 1.448 1.425 0.921

1.483 1.241 1.532 1.483 1.538 1.502 0.964

21.038 18.292 22.192 21.072 22.314 21.280 15.382

98th Percentile -dv

CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

0.674 1.445 1.192 0.646 0.648 0.384

0.224 0.385 0.316 0.217 0.218 0.038

0.427 0.588 0.543 0.405 0.407 0.175

0.72 1.18 1.002 0.693 0.694 0.110

0.74 1.031 0.905 0.709 0.711 0.025

0.602 1.143 0.937 0.565 0.568 0.270

0.556 0.7 0.602 0.555 0.556 0.021

2.851 3.839 3.484 2.783 2.788 0.474

0.474 0.602 0.518 0.474 0.474 0.012

0.158 0.252 0.215 0.154 0.155 0.026

0.743 1.111 0.992 0.736 0.736 0.185

0.632 0.873 0.771 0.632 0.632 0.088

0.546 0.839 0.675 0.536 0.537 0.079

9.347 13.988 12.152 9.105 9.124 1.887

2003

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

0.718 0.151 0.384 0.106 0.286 0.967

0.090 0.029 0.038 0.022 0.037 0.189

0.307 0.066 0.179 0.049 0.130 0.252

0.355 0.022 0.099 0.013 0.125 0.607

0.235 0.018 0.025 0.016 0.021 0.392

0.605 0.099 0.271 0.079 0.210 0.702

0.340 0.004 0.021 0.003 0.019 0.237

0.842 0.152 0.443 0.171 0.495 1.333

0.213 0.007 0.013 0.006 0.019 0.136

0.038 0.006 0.027 0.006 0.015 0.123

0.388 0.082 0.186 0.058 0.147 0.390

0.181 0.067 0.088 0.058 0.081 0.289

0.321 0.030 0.079 0.024 0.060 0.418

4.633 0.733 1.853 0.611 1.645 6.035

 Change relative to base (-dv)

CTRL1_R CTRL2_R ctrl2_r2 Base Ctrl-1 Ctrl-2

0.253 0.799 0.797 1.828 1.519 1.163

0.069 0.168 0.167 0.790 0.708 0.658

0.045 0.183 0.181 1.279 1.251 1.061

0.178 0.487 0.486 2.668 2.278 1.843

0.126 0.322 0.320 1.877 1.728 1.456

0.206 0.578 0.575 1.475 1.267 0.986

0.098 0.145 0.144 1.612 1.488 1.268

0.355 1.056 1.051 4.569 4.347 3.796

0.084 0.128 0.128 1.445 1.342 1.139

0.037 0.098 0.097 0.714 0.650 0.562

0.119 0.375 0.375 2.111 1.835 1.577

0.102 0.241 0.241 1.938 1.813 1.504

0.164 0.303 0.302 1.970 1.744 1.412

1.836 4.883 4.864 24.276 21.970 18.425

Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2

1.710 1.517 1.737 1.584 1.307 0.593

0.744 0.709 0.754 0.716 0.441 0.294

1.269 1.248 1.269 1.261 0.622 0.428

2.546 2.289 2.561 2.374 1.939 0.96

1.801 1.728 1.822 1.732 1.175 0.718

1.388 1.265 1.412 1.316 1.056 0.49

1.591 1.486 1.592 1.534 1.055 0.57

4.452 4.347 4.469 4.350 3.964 2.724

1.382 1.342 1.394 1.344 0.837 0.511

0.677 0.650 0.686 0.653 0.316 0.244

2.018 1.835 2.012 1.836 1.351 0.793

1.895 1.809 1.906 1.851 1.301 0.751

1.875 1.743 1.898 1.815 1.394 0.674

23.348 21.968 23.512 22.366 16.758 9.750

98th Percentile D-dv

Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2

1.163 0.965 0.556 0.559 0.309 0.665

0.417 0.363 0.289 0.289 0.082 0.132

0.546 0.48 0.413 0.415 0.028 0.218

1.73 1.45 0.921 0.924 0.390 0.825

1.067 0.908 0.709 0.711 0.149 0.421

0.917 0.752 0.458 0.461 0.208 0.489

0.901 0.772 0.555 0.556 0.124 0.344

3.701 3.343 2.665 2.67 0.222 0.773

0.76 0.655 0.511 0.511 0.103 0.306

0.295 0.282 0.24 0.24 0.064 0.152

1.209 1.069 0.774 0.775 0.276 0.534

1.184 1.013 0.722 0.723 0.125 0.434

1.208 0.977 0.64 0.642 0.226 0.558

15.098 13.029 9.453 9.476 2.306 5.851

All Years

Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R

0.118 0.311 0.091 0.244 0.714 0.198

0.046 0.081 0.036 0.074 0.147 0.054

0.010 0.031 0.010 0.018 0.194 0.066

0.122 0.379 0.107 0.294 0.979 0.28

0.076 0.149 0.055 0.145 0.457 0.159

0.087 0.210 0.063 0.159 0.566 0.165

0.021 0.126 0.020 0.078 0.485 0.129

0.117 0.222 0.100 0.219 1.24 0.358

0.063 0.103 0.051 0.101 0.326 0.105

0.037 0.064 0.028 0.061 0.072 0.013

0.093 0.276 0.099 0.275 0.558 0.14

0.043 0.129 0.032 0.087 0.55 0.171

0.095 0.227 0.072 0.155 0.72 0.231

0.928 2.308 0.764 1.910 7.008 2.069

 Change relative to base (dv)

CTRL2_R ctrl2_r2

0.607 0.604

0.128 0.128

0.133 0.131

0.809 0.806

0.358 0.356

0.459 0.456

0.346 0.345

1.036 1.031

0.249 0.249

0.055 0.055

0.435 0.434

0.462 0.461

0.568 0.566

5.645 5.622
Cholla units 2, 3, and 4

Table 2. Control Options (per EPA Region 9) and Corresponding Emission Reductions Relative to Base Used in Visibility Modeling 

All Units All Units

Controls

Technology 

Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

-Emissions 

(TPY, annual 

av) $/year

Pre-LNB SOFA Base Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 0 $0

Pre-LNB SNCR Ctrl-1 PreLNB SNCR 929 PreLNB SNCR 871 PreLNB SNCR 1082 2882 $8,564,847

Pre-LNB SCR Ctrl-2 PreLNB SCR 2606 PreLNB SCR 2332 PreLNB SCR 2913 7851 $27,858,991

Pre-LNB SNCR u.4 Ctrl-3 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SNCR 1082 1082 $3,284,409

Pre-LNB SCR u.4 Ctrl-4 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SCR 2913 2913 $10,781,102

Pre-LNB SNCR u.3 Ctrl-5 Pre-LNB + SOFA 0 PreLNB SNCR 871 Pre-LNB + SOFA 0 871 $2,607,329

Pre-LNB SCR u.3 Ctrl-6 Pre-LNB + SOFA 0 PreLNB SCR 2332 Pre-LNB + SOFA 0 2332 $8,842,201

Pre-LNB; SO2cor Basecorr Pre-LNB+SO2corr 0 PreLNB + SO2c 0 PreLNB + SO2c 0 0 $0

Pre-LNB SCR SO2c CTRL2 PreLNB SCR SO2c 2606 PreLNB SCR SO2c 2332 PreLNB SCR SO2c 2913 7851 $27,858,991

Post-LNB SO2cor Rev Base Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 0 $0

Post-LNB SNCR SO2c CTRL1_R PostLNB SNCR SO2c 867 PostLNB SNCR SO2c 871 PostLNB SNCR SO2c 1082 2820 $8,436,045

PoLN SCR 84%CE, SO2c CTRL2_R PostLNB SCR 84% CE;SO2c2428 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7673 $27,741,193

PoLN SCR 83%CE, SO2c ctrl2-r2 PostLNB SCR 83% CE;SO2c2400 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7645 $27,736,569

Table 3(a). Original NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 5/29/12 Table 3(b). Updated NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version6/19/12

SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR

Capacity Factor 74% 74% 75% 75% 72% 72% Capacity Factor 74% 74% 75% 75% 72% 72%

Control Efficiency 30% 84% 30% 80% 30% 81% Control Efficiency 30% 83%* 30% 80% 30% 81% *Addt'l 1% CE on Unit 2 SCR

Uncontrolled Rate Uncontrolled Rate

NOx Rate (lb/hr) 955 955 884 884 1144 1144 NOx Rate (lb/hr) 892 892 884 884 1144 1144

NOx Rate (lb/MMBtu) 0.32 0.32 0.25 0.25 0.26 0.26 NOx Rate (lb/MMBtu) 0.295 0.295 0.25 0.25 0.26 0.26

NOx (TPY) 3096 3096 2904 2904 3607 3607 NOx (TPY) 2890 2890 2904 2904 3607 3607

Controlled Rate Controlled Rate

NOx Rate (lb/hr) 669 151 619 174 801 220 NOx Rate (lb/hr) 624 151 619 174 801 220

NOx Rate (lb/MMBtu) 0.22 0.05 0.18 0.05 0.18 0.05 NOx Rate (lb/MMBtu) 0.21 0.05 0.18 0.05 0.18 0.05

NOx (TPY) 2167 490 2033 572 2525 694 NOx (TPY) 2023 490 2033 572 2525 694

Tons/Year Removed 929 2606 871 2332 1082 2913 Tons/Year Removed 867 2400 871 2332 1082 2913

Total Cost, $/year $2,673,109 $8,235,688 $2,607,329 $8,842,201 $3,284,409 $10,781,102 Total Cost, $/year $2,544,307 $8,113,266 $2,607,329 $8,842,201 $3,284,409 $10,781,102 $8,117,890 per ATP 6/23/12

$/Ton $2,878 $3,160 $2,993 $3,792 $3,035 $3,700 $/Ton $2,935 $3,308 $2,993 $3,792 $3,035 $3,700 

$/Ton (incremental) $2,878 $3,317 $2,993 $4,268 $3,035 $4,094 $/Ton (incremental) $2,935 $3,632 $2,993 $4,268 $3,035 $4,094 

Cholla units 2, 3, and 4 draft UNC results, 2012-04-30

visibility method 6, 20% best background

Using dv from area with highest impact (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv

dv/TPY 

(x 1000)

$/dv 

(millions)

# areas w/ 

improvement 

≥ 0.5 dv

Pre-LNB SOFA Base 0 $0.0 5.6

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 5.3 0.48 0.166 $18 0

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 4.7 1.02 0.130 $27 8

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 5.5 0.15 0.138 $22 0

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 5.3 0.47 0.160 $23 0

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 5.5 0.13 0.149 $20 0

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 5.3 0.36 0.154 $25 0

Pre-LNB; SO2cor Basecorr 0 $0.0 4.9

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 3.4 1.48 0.189 $19 9

Post-LNB SO2cor Rev Base 0 $0.0 4.6

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 4.2 0.42 0.149 $20 0

PoLN SCR 84%CE, SO2c CTRL2_R 7673 $27.7 $3,616 3.3 1.27 0.166 $22 7

PoLN SCR 83%CE, SO2c Ctrl2-r2 7645 $27.7 $3,628 3.3 1.27 0.166 $22 7

(same tons & costs as above) Using dv sum over all areas (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv

dv/TPY (x 

1000)

$/dv 

(millions)

Pre-LNB SOFA Base 0 $0.0 30.6

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 27.8 2.76 0.956 $3.1

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 23.4 7.14 0.910 $3.9

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 29.5 1.01 0.929 $3.3

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 27.8 2.77 0.950 $3.9

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 29.7 0.81 0.932 $3.2

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 28.3 2.27 0.973 $3.9

Pre-LNB; SO2cor Basecorr 0 $0.0 21.2

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 12.4 8.80 1.121 $3.2

Post-LNB SO2cor Rev Base 0 $0.0 19.2

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 16.6 2.60 0.923 $3.2

PoLN SCR 84%CE, SO2c CTRL2_R 7673 $27.7 $3,616 12.1 7.14 0.930 $3.9

PoLN SCR 83%CE, SO2c Ctrl2-r2 7645 $27.7 $3,628 12.1 7.11 0.930 $3.9

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx

Control 

Option

Unit 2 Unit 3 Unit 4

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx
Cholla units 2, 3, and 4

visibility method 6, 20% best background (this page edited from vis6.20best sheet)

Table 1(b). Visibility Impairment (98th Percentile) for 2001-2003 Base Case Emissions and Control Options

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base Ctrl1_R

CIA Class I Area Pre-LNB 

SOFA

Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

Post-LNB 

SO2cor

Post-LNB 

SNCR 

SO2c

care Capitol Reef 2.31 1.95 1.50 2.18 1.94 2.22 2.03 1.68 0.77 1.50 1.23

gali Galiuro 1.02 0.92 0.85 0.96 0.92 0.98 0.93 0.57 0.38 0.54 0.47

gila Gila 1.64 1.60 1.36 1.62 1.60 1.62 1.61 0.81 0.56 0.71 0.62

grca Grand Canyon 3.37 2.89 2.35 3.22 2.90 3.24 3.01 2.47 1.24 2.21 1.86

maza Mazatzal 2.38 2.19 1.86 2.28 2.19 2.31 2.21 1.50 0.92 1.37 1.17

meve Mesa Verde 1.88 1.62 1.25 1.77 1.61 1.80 1.68 1.34 0.63 1.17 0.97

moba Mount Baldy 2.05 1.90 1.61 2.02 1.90 2.02 1.96 1.35 0.73 1.16 0.99

pefo Petrified Forest 5.55 5.32 4.71 5.49 5.32 5.50 5.32 4.86 3.38 4.61 4.19

pimo Pine Mountain 1.84 1.72 1.46 1.77 1.72 1.79 1.71 1.07 0.65 0.98 0.85

sagu Saguaro 0.92 0.84 0.73 0.88 0.84 0.89 0.85 0.41 0.32 0.38 0.36

sian Sierra Ancha 2.64 2.32 2.00 2.56 2.32 2.55 2.34 1.73 1.02 1.55 1.36

supe Superstition 2.45 2.31 1.92 2.40 2.31 2.41 2.34 1.67 0.97 1.50 1.31

syca Sycamore Canyon 2.50 2.22 1.81 2.39 2.22 2.42 2.31 1.78 0.87 1.55 1.26

Total 30.55 27.80 23.41 29.55 27.78 29.74 28.28 21.23 12.43 19.23 16.63

Max 5.55 5.32 4.71 5.49 5.32 5.50 5.32 4.86 3.38 4.61 4.19

# CIAs w. -dv >0.5 13 13 13 13 13 13 13 12 11 12 11

Table 4(b). Control Option Visibility Benefits (dv/thousand TPY)*

Class I Area Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR 

SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 0.128 0.103 0.120 0.128 0.111 0.123 0.116 0.094 0.101 0.101

gali Galiuro 0.036 0.022 0.055 0.036 0.053 0.040 0.024 0.023 0.021 0.021

gila Gila 0.012 0.035 0.016 0.013 0.020 0.010 0.032 0.031 0.022 0.022

grca Grand Canyon 0.166 0.130 0.138 0.160 0.149 0.154 0.157 0.124 0.133 0.133

maza Mazatzal 0.067 0.066 0.087 0.065 0.078 0.074 0.075 0.071 0.060 0.060

meve Mesa Verde 0.092 0.081 0.106 0.092 0.090 0.088 0.091 0.074 0.077 0.077

moba Mount Baldy 0.050 0.055 0.024 0.050 0.025 0.037 0.078 0.062 0.058 0.058

pefo Petrified Forest 0.080 0.108 0.058 0.079 0.065 0.098 0.189 0.149 0.166 0.166

98th Percentile D-dv

pefo Petrified Forest 0.080 0.108 0.058 0.079 0.065 0.098 0.189 0.149 0.166 0.166

pimo Pine Mountain 0.043 0.048 0.063 0.043 0.060 0.055 0.053 0.048 0.043 0.043

sagu Saguaro 0.027 0.025 0.042 0.027 0.039 0.032 0.012 0.007 0.009 0.009

sian Sierra Ancha 0.111 0.082 0.077 0.112 0.104 0.133 0.090 0.067 0.072 0.072

supe Superstition 0.047 0.067 0.043 0.048 0.045 0.046 0.089 0.070 0.074 0.074

syca Sycamore Canyon 0.097 0.088 0.101 0.098 0.093 0.082 0.117 0.103 0.094 0.094

Average 0.074 0.070 0.071 0.073 0.072 0.075 0.086 0.071 0.072 0.072

dv_sum/TPY 0.956 0.910 0.929 0.950 0.932 0.973 1.121 0.923 0.930 0.930

dv_max/TPY 0.166 0.130 0.138 0.160 0.149 0.154 0.189 0.149 0.166 0.166

*Uses the formula: dv/thousand TPY = 1000 * (dv change relative to base) / (TPY reduction relative to base)

Table 5(b). Control Option Cost Effectiveness (million $/dv)†

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR 

SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 23 34 25 29 27 31 31 32 36 36

gali Galiuro 82 160 56 104 57 94 151 130 172 173

gila Gila 245 101 193 276 153 384 111 96 163 165

grca Grand Canyon 18 27 22 23 20 25 23 24 27 27

maza Mazatzal 44 54 35 57 38 51 48 42 61 61

meve Mesa Verde 32 44 29 40 33 43 39 40 47 47

moba Mount Baldy 60 64 126 74 119 103 45 48 62 62

pefo Petrified Forest 37 33 52 47 46 39 19 20 22 22

pimo Pine Mountain 69 74 48 86 50 69 67 63 84 84

sagu Saguaro 110 142 73 138 77 118 293 422 391 396

sian Sierra Ancha 27 43 40 33 N/A 29 39 45 50 50

supe Superstition 63 53 70 77 67 83 40 43 49 49

syca Sycamore Canyon 31 40 30 38 32 46 30 29 38 39

$/dv_sum 3.1 3.9 3.3 3.9 3.2 3.9 3.2 3.2 3.9 3.9

$/dv_max 17.9 27.4 22.0 23.2 20.1 24.6 18.8 20.1 21.8 21.9

Class I Area
†$/dv = $ per year from Table 3 divided by delta dv from Table 1(b) for each control option, in millions
 Change relative to base (dv)

Ctrl2_R ctrl2-r2 Basecorr Rev Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB; 

SO2cor 

Post-LNB 

SO2cor

Pre-LNB 

SNCR Pre-LNB SCR

Pre-LNB 

SNCR u.4

Pre-LNB SCR 

u.4

Pre-LNB 

SNCR u.3

Pre-LNB SCR 

u.3

Pre-LNB SCR 

SO2c

Post-LNB 

SNCR SO2c

0.72 0.73 0.00 0.00 0.37 0.81 0.13 0.37 0.10 0.29 0.91 0.26

0.38 0.38 0.00 0.00 0.11 0.17 0.06 0.10 0.05 0.09 0.19 0.07

0.54 0.54 0.00 0.00 0.03 0.28 0.02 0.04 0.02 0.02 0.25 0.09

1.19 1.19 0.00 0.00 0.48 1.02 0.15 0.47 0.13 0.36 1.23 0.35

0.91 0.91 0.00 0.00 0.19 0.52 0.09 0.19 0.07 0.17 0.59 0.20

0.59 0.59 0.00 0.00 0.27 0.63 0.12 0.27 0.08 0.21 0.71 0.21

0.72 0.72 0.00 0.00 0.14 0.43 0.03 0.15 0.02 0.09 0.62 0.18

3.33 3.34 0.00 0.00 0.23 0.85 0.06 0.23 0.06 0.23 1.48 0.42

0.65 0.65 0.00 0.00 0.12 0.38 0.07 0.13 0.05 0.13 0.41 0.13

0.31 0.31 0.00 0.00 0.08 0.20 0.05 0.08 0.03 0.08 0.10 0.02

1.00 1.00 0.00 0.00 0.32 0.64 0.08 0.33 0.09 0.31 0.71 0.19

0.93 0.94 0.00 0.00 0.14 0.53 0.05 0.14 0.04 0.11 0.70 0.20

0.83 0.83 0.00 0.00 0.28 0.69 0.11 0.29 0.08 0.19 0.92 0.29

12.10 12.12 2.76 7.14 1.01 2.77 0.81 2.27 8.80 2.60

3.33 3.34 0.48 1.02 0.15 0.47 0.13 0.36 1.48 0.42

11 11 0 8 0 0 0 0 9 0

Number of Class I Areas with visibility improvement ≥ 0.5 dv

4.00

5.00

6.00

Cholla: 98th Percentile Visibility Impairment, IMPROVE Method 6

average of all area's (dv/annual TPY)

(sum of dv benefits over all areas) / (annual TPY)

(max dv benefit of any area) / (annual TPY)

($/yr) / (sum of dv benefits over all areas)

($/yr) / (max dv benefit of any area)

Capitol Reef Galiuro Gila Grand 

Canyon Mazatzal Mesa Verde Mount Baldy 

Basecorr Pre-LNB; SO2cor 1.68 0.57 0.81 2.47 1.50 1.34 1.35

CTRL2 Pre-LNB SCR SO2c 0.77 0.38 0.56 1.24 0.92 0.63 0.73

Rev Base Post-LNB SO2cor 1.50 0.54 0.71 2.21 1.37 1.17 1.16

Ctrl1_R Post-LNB SNCR SO2c 1.23 0.47 0.62 1.86 1.17 0.97 0.99

Ctrl2_R PoLN SCR 84%CE, SO2c 0.72 0.38 0.54 1.19 0.91 0.59 0.72

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.73 0.38 0.54 1.19 0.91 0.59 0.72

0.00

1.00

2.00

3.00

4.00

Visibility Impairment (-dv)

Ctrl2_R ctrl2-r2

PoLN SCR 

84%CE, SO2c

PoLN SCR 

83%CE, SO2c

0.77 0.77

0.16 0.16

0.17 0.17

1.02 1.02

0.46 0.46

0.59 0.59

0.45 0.45

1.27 1.27

0.33 0.33

0.07 0.07

0.55 0.55

0.57 0.57

0.72 0.72

7.14 7.11

1.27 1.27

7 7

ment, IMPROVE Method 6, 20% Best Bkgd. 

1.20

1.40

1.60

Mount Baldy Petrified 

Forest

Pine 

Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

1.35 4.86 1.07 0.41 1.73 1.67 1.78

0.73 3.38 0.65 0.32 1.02 0.97 0.87

1.16 4.61 0.98 0.38 1.55 1.50 1.55

0.99 4.19 0.85 0.36 1.36 1.31 1.26

0.72 3.33 0.65 0.31 1.00 0.93 0.83

0.72 3.34 0.65 0.31 1.00 0.94 0.83 Basecorr Pre-LNB; SO2cor 

CTRL2 Pre-LNB SCR SO2c

Rev Base Post-LNB SO2cor

Ctrl1_R Post-LNB SNCR SO2c

Ctrl2_R PoLN SCR 84%CE, SO2c

ctrl2-r2 PoLN SCR 83%CE, SO2c

0.00

0.20

0.40

0.60

0.80

1.00

1.20

Visibility Benefit, dv

Cholla: Visibility Benefit of Controls, IMPROVE Method 6, 20% Best Bkgd. 

Capitol Reef Galiuro Gila Grand 

Canyon Mazatzal Mesa Verde Mount Baldy Petrified Forest

Pine 

Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.91 0.19 0.25 1.23 0.59 0.71 0.62 1.48 0.41 0.10 0.71 0.70 0.92

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.26 0.07 0.09 0.35 0.20 0.21 0.18 0.42 0.13 0.02 0.19 0.20 0.29

0.77 0.16 0.17 1.02 0.46 0.59 0.45 1.27 0.33 0.07 0.55 0.57 0.72

0.77 0.16 0.17 1.02 0.46 0.59 0.45 1.27 0.33 0.07 0.55 0.57 0.72
Control Option All Units All Units

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Technology Used

 -Emissions 

(TPY) Technology Used

 -Emissions 

(TPY) Technology Used

 -Emissions 

(TPY)

 -Emissions 

(TPY) $/year

care 2.250 1.942 1.468 2.138 1.932 2.161 2.007 1.593 0.683 1.400 1.146 0.646 0.646 0.308 0.782 0.112 0.318 0.089 0.243 0.910 0.254 0.754 0.754 1.494 1.280 1.152 1.417 1.287 1.430 1.322 1.059 0.441 0.917 0.734 0.415 0.416 0.214 0.342 0.077 0.207 0.064 0.172 0.618 0.183 0.502 0.501 2.826 2.338 1.941 2.640 2.313 2.695 2.473 2.106 0.874 1.859 1.539 0.837 0.839 0.488 0.885 0.186 0.513 0.131 0.353 1.232 0.320 1.022 1.020 2.314 1.945 1.502 2.184 1.941 2.217 2.027 1.678 0.769 1.496 1.232 0.722 0.725 0.369 0.812 0.130 0.373 0.097 0.287 0.909 0.264 0.774 0.771 Base Pre-LNB + SOFA 0.000 Pre-LNB + SOFA 0.000 Pre-LNB + SOFA 0.000 0.000 $0

gali 1.258 1.253 1.176 1.257 1.255 1.255 1.254 0.607 0.443 0.575 0.511 0.442 0.442 0.005 0.082 0.001 0.003 0.003 0.004 0.164 0.064 0.133 0.133 1.101 1.100 0.882 1.101 1.100 1.101 1.100 0.527 0.365 0.467 0.409 0.365 0.365 0.001 0.219 0.000 0.001 0.000 0.001 0.162 0.058 0.102 0.102 0.879 0.822 0.756 0.843 0.821 0.852 0.824 0.534 0.291 0.500 0.411 0.283 0.283 0.057 0.123 0.036 0.058 0.027 0.055 0.243 0.089 0.217 0.217 1.021 0.916 0.847 0.962 0.917 0.975 0.927 0.568 0.383 0.536 0.471 0.375 0.376 0.105 0.174 0.059 0.104 0.046 0.094 0.185 0.065 0.161 0.160 Ctrl-1 PreLNB SNCR 929.000 PreLNB SNCR 871.000 PreLNB SNCR 1082.000 2882.000 $8,564,847

gila 1.254 1.169 1.104 1.222 1.167 1.231 1.192 0.737 0.413 0.661 0.579 0.402 0.403 0.085 0.150 0.032 0.087 0.023 0.062 0.324 0.082 0.259 0.258 1.685 1.634 1.614 1.644 1.634 1.650 1.635 0.833 0.561 0.734 0.636 0.561 0.561 0.051 0.071 0.041 0.051 0.035 0.050 0.272 0.098 0.173 0.173 1.667 1.445 1.273 1.583 1.441 1.605 1.503 0.877 0.555 0.760 0.701 0.525 0.528 0.222 0.394 0.084 0.226 0.062 0.164 0.322 0.059 0.235 0.232 1.637 1.602 1.362 1.620 1.598 1.620 1.614 0.805 0.555 0.706 0.618 0.536 0.538 0.035 0.275 0.017 0.039 0.017 0.023 0.250 0.088 0.170 0.168 Ctrl-2 PreLNB SCR 2606.000 PreLNB SCR 2332.000 PreLNB SCR 2913.000 7851.000 $27,858,991

grca 4.736 4.370 3.378 4.610 4.369 4.639 4.461 4.027 1.999 3.658 3.108 1.912 1.918 0.366 1.358 0.126 0.367 0.097 0.275 2.028 0.550 1.746 1.740 3.401 2.889 2.276 3.218 2.902 3.254 3.007 2.354 1.166 2.100 1.771 1.092 1.098 0.512 1.125 0.183 0.499 0.147 0.394 1.188 0.329 1.008 1.002 2.344 2.249 1.942 2.317 2.263 2.328 2.231 1.704 0.932 1.519 1.292 0.898 0.899 0.095 0.402 0.027 0.081 0.016 0.113 0.772 0.227 0.621 0.620 3.367 2.889 2.350 3.218 2.902 3.237 3.007 2.470 1.239 2.210 1.859 1.189 1.193 0.478 1.017 0.149 0.465 0.130 0.360 1.231 0.351 1.021 1.017 Ctrl-3 Pre-LNB + SOFA 0.000 Pre-LNB + SOFA 0.000 PreLNB SNCR 1082.000 1082.000 $3,284,409

maza 2.157 1.940 1.553 2.076 1.938 2.093 1.986 1.502 0.893 1.379 1.223 0.867 0.869 0.217 0.604 0.081 0.219 0.064 0.171 0.609 0.156 0.512 0.510 2.398 2.219 1.941 2.319 2.218 2.325 2.222 1.521 0.878 1.372 1.154 0.855 0.857 0.179 0.457 0.079 0.180 0.073 0.176 0.643 0.218 0.517 0.515 2.233 2.185 1.916 2.194 2.185 2.196 2.190 1.455 0.955 1.326 1.166 0.917 0.919 0.048 0.317 0.039 0.048 0.037 0.043 0.500 0.160 0.409 0.407 2.378 2.185 1.862 2.284 2.190 2.310 2.206 1.502 0.916 1.372 1.171 0.914 0.914 0.193 0.516 0.094 0.188 0.068 0.172 0.586 0.201 0.458 0.458 Ctrl-4 Pre-LNB + SOFA 0.000 Pre-LNB + SOFA 0.000 PreLNB SCR 2913.000 2913.000 $10,781,102

meve 1.386 1.218 1.058 1.303 1.212 1.335 1.256 1.005 0.437 0.875 0.699 0.424 0.426 0.168 0.328 0.083 0.174 0.051 0.130 0.568 0.176 0.451 0.449 1.941 1.694 1.248 1.833 1.688 1.883 1.793 1.349 0.648 1.183 0.967 0.610 0.613 0.247 0.693 0.108 0.253 0.058 0.148 0.701 0.216 0.573 0.570 2.228 1.894 1.452 2.106 1.893 2.131 1.968 1.662 0.771 1.459 1.200 0.724 0.728 0.334 0.776 0.122 0.335 0.097 0.260 0.891 0.259 0.735 0.731 1.882 1.616 1.248 1.767 1.613 1.804 1.676 1.339 0.626 1.174 0.965 0.586 0.589 0.266 0.634 0.115 0.269 0.078 0.206 0.713 0.209 0.588 0.585 Ctrl-5 Pre-LNB + SOFA 0.000 PreLNB SNCR 871.000 Pre-LNB + SOFA 0.000 871.000 $2,607,329

moba 2.065 1.805 1.401 1.985 1.802 1.993 1.828 1.572 0.739 1.354 1.067 0.695 0.699 0.260 0.664 0.080 0.263 0.072 0.237 0.833 0.287 0.659 0.655 1.897 1.819 1.731 1.824 1.819 1.825 1.821 1.357 0.710 1.192 0.991 0.692 0.693 0.078 0.166 0.073 0.078 0.072 0.076 0.647 0.201 0.500 0.499 2.028 2.015 1.617 2.023 2.015 2.024 2.017 1.013 0.716 0.901 0.769 0.715 0.715 0.013 0.411 0.005 0.013 0.004 0.011 0.297 0.132 0.186 0.186 2.046 1.903 1.613 2.020 1.901 2.024 1.960 1.346 0.730 1.162 0.987 0.715 0.715 0.143 0.433 0.026 0.145 0.022 0.086 0.616 0.175 0.447 0.447 Ctrl-6 Pre-LNB + SOFA 0.000 PreLNB SCR 2332.000 Pre-LNB + SOFA 0.000 2332.000 $8,842,201

pefo 5.553 5.166 4.707 5.410 5.150 5.437 5.232 4.934 3.485 4.617 4.252 3.413 3.418 0.387 0.846 0.143 0.403 0.116 0.321 1.449 0.365 1.204 1.199 5.230 4.909 4.215 5.154 4.905 5.166 4.987 4.387 3.138 4.118 3.689 3.092 3.096 0.321 1.015 0.076 0.325 0.064 0.243 1.249 0.429 1.026 1.022 6.220 5.656 5.178 6.034 5.693 6.012 5.632 5.184 3.559 4.782 4.304 3.478 3.483 0.564 1.042 0.186 0.527 0.208 0.588 1.625 0.478 1.304 1.299 5.553 5.322 4.707 5.490 5.322 5.496 5.324 4.863 3.381 4.606 4.187 3.334 3.337 0.231 0.846 0.063 0.231 0.057 0.229 1.482 0.419 1.272 1.269 Basecorr Pre-LNB+SO2corr 0.000 PreLNB + SO2c 0.000 PreLNB + SO2c 0.000 0.000 $0

pimo 1.576 1.391 1.187 1.509 1.392 1.519 1.421 1.064 0.586 0.952 0.810 0.561 0.563 0.185 0.389 0.067 0.184 0.057 0.155 0.478 0.142 0.391 0.389 2.031 1.918 1.669 1.977 1.918 1.989 1.923 1.310 0.727 1.174 0.996 0.709 0.71 0.113 0.362 0.054 0.113 0.042 0.108 0.583 0.178 0.465 0.464 1.720 1.709 1.463 1.712 1.709 1.713 1.708 0.780 0.611 0.769 0.673 0.610 0.61 0.011 0.257 0.008 0.011 0.007 0.012 0.169 0.096 0.159 0.159 1.840 1.716 1.463 1.772 1.715 1.788 1.711 1.066 0.652 0.983 0.849 0.652 0.652 0.124 0.377 0.068 0.125 0.052 0.129 0.414 0.134 0.331 0.331 CTRL2 PreLNB SCR SO2c 2606.000 PreLNB SCR SO2c 2332.000 PreLNB SCR SO2c 2913.000 7851.000 $27,858,991

sagu 1.154 1.081 0.843 1.152 1.081 1.154 1.096 0.478 0.383 0.449 0.446 0.372 0.374 0.073 0.311 0.002 0.073 0.000 0.058 0.095 0.003 0.077 0.075 0.848 0.798 0.648 0.848 0.797 0.848 0.830 0.361 0.258 0.313 0.309 0.242 0.243 0.050 0.200 0.000 0.051 0.000 0.018 0.103 0.004 0.071 0.070 0.598 0.555 0.541 0.580 0.555 0.580 0.569 0.364 0.206 0.327 0.281 0.200 0.2 0.043 0.057 0.018 0.043 0.018 0.029 0.158 0.046 0.127 0.127 0.922 0.844 0.726 0.877 0.844 0.888 0.847 0.412 0.317 0.382 0.362 0.311 0.312 0.078 0.196 0.045 0.078 0.034 0.075 0.095 0.020 0.071 0.070 Rev Base Post-LNB+SO2corr 0.000 Post-LNB+SO2corr 0.000 Post-LNB+SO2corr 0.000 0.000 $0

sian 2.384 2.319 2.140 2.321 2.318 2.332 2.320 1.864 0.969 1.626 1.360 0.942 0.944 0.065 0.244 0.063 0.066 0.052 0.064 0.895 0.266 0.684 0.682 2.680 2.540 1.972 2.643 2.528 2.644 2.627 1.794 1.029 1.628 1.388 0.999 1 0.140 0.708 0.037 0.152 0.036 0.053 0.765 0.240 0.629 0.628 2.251 2.009 1.780 2.159 2.008 2.177 2.081 1.436 0.959 1.409 1.277 0.938 0.939 0.242 0.471 0.092 0.243 0.074 0.170 0.477 0.132 0.471 0.470 2.644 2.324 2.000 2.561 2.319 2.553 2.335 1.729 1.023 1.551 1.362 0.999 1 0.320 0.644 0.083 0.325 0.091 0.309 0.706 0.189 0.552 0.551 CTRL1_R PostLNB SNCR SO2c 867.000 PostLNB SNCR SO2c 871.000 PostLNB SNCR SO2c 1082.000 2820.000 $8,436,045

supe 2.466 2.316 1.882 2.457 2.317 2.459 2.372 1.791 1.067 1.599 1.372 1.048 1.048 0.150 0.584 0.009 0.149 0.007 0.094 0.724 0.227 0.551 0.551 2.588 2.471 1.951 2.544 2.472 2.553 2.504 1.710 0.972 1.556 1.350 0.967 0.969 0.117 0.637 0.044 0.116 0.035 0.084 0.738 0.206 0.589 0.587 1.927 1.795 1.682 1.843 1.794 1.854 1.804 1.189 0.811 1.127 0.997 0.811 0.811 0.132 0.245 0.084 0.133 0.073 0.123 0.378 0.130 0.316 0.316 2.446 2.311 1.917 2.399 2.306 2.407 2.339 1.668 0.971 1.503 1.305 0.934 0.936 0.135 0.529 0.047 0.140 0.039 0.107 0.697 0.198 0.569 0.567 CTRL2_R PostLNB SCR 84% CE;SO2c 2427.600 PostLNB SCR SO2c 2332.000 PostLNB SCR SO2c 2913.000 7672.600 $27,741,193

syca 2.342 2.122 1.731 2.224 2.121 2.248 2.128 1.782 0.826 1.566 1.285 0.824 0.824 0.220 0.611 0.118 0.221 0.094 0.214 0.956 0.281 0.742 0.742 2.959 2.760 2.183 2.820 2.760 2.849 2.762 1.929 1.045 1.741 1.477 1.012 1.016 0.199 0.776 0.139 0.199 0.110 0.197 0.884 0.264 0.729 0.725 1.985 1.887 1.591 1.948 1.887 1.956 1.910 1.235 0.703 1.077 0.868 0.691 0.692 0.098 0.394 0.037 0.098 0.029 0.075 0.532 0.209 0.386 0.385 2.501 2.222 1.810 2.392 2.215 2.420 2.309 1.782 0.867 1.552 1.262 0.830 0.833 0.279 0.691 0.109 0.286 0.081 0.192 0.915 0.290 0.722 0.719 ctrl2-r2 PostLNB SCR 83% CE;SO2c 2400.000 PostLNB SCR SO2c 2332.000 PostLNB SCR SO2c 2913.000 7645.000 $27,736,569

Total 30.581 28.092 23.628 29.664 28.054 29.856 28.553 22.956 12.923 20.711 17.858 12.548 12.574 2.489 6.953 0.917 2.527 0.725 2.028 10.033 2.853 8.163 8.137 30.253 28.031 23.482 29.342 28.028 29.517 28.533 20.491 11.938 18.495 15.871 11.611 11.637 2.222 6.771 0.911 2.225 0.736 1.720 8.553 2.624 6.884 6.858 28.906 26.559 23.132 27.982 26.577 28.123 26.910 19.539 11.943 17.815 15.478 11.627 11.646 2.347 5.774 0.924 2.329 0.783 1.996 7.596 2.337 6.188 6.169 30.551 27.795 23.407 29.546 27.783 29.739 28.282 21.228 12.429 19.233 16.630 12.097 12.120 2.756 7.144 1.005 2.768 0.812 2.269 8.799 2.603 7.136 7.113

Table 3(a). Original NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 5/29/2012

SNCR SCR SNCR SCR SNCR SCR

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

care 0.107 0.100 0.104 0.109 0.102 0.104 0.116 0.090 0.098 0.099 0.074 0.044 0.071 0.071 0.073 0.074 0.079 0.065 0.065 0.066 0.169 0.113 0.172 0.176 0.150 0.151 0.157 0.113 0.133 0.133 0.128 0.103 0.120 0.128 0.111 0.123 0.116 0.094 0.101 0.101 Capacity Factor 74% 74% 75% 75% 72% 72%

gali 0.002 0.010 0.001 0.001 0.003 0.002 0.021 0.023 0.017 0.017 0.000 0.028 0.000 0.000 0.000 0.000 0.021 0.021 0.013 0.013 0.020 0.016 0.033 0.020 0.031 0.024 0.031 0.032 0.028 0.028 0.036 0.022 0.055 0.036 0.053 0.040 0.024 0.023 0.021 0.021 Control Efficiency 30% 84% 30% 80% 30% 81%

gila 0.029 0.019 0.030 0.030 0.026 0.027 0.041 0.029 0.034 0.034 0.018 0.009 0.038 0.018 0.040 0.021 0.035 0.035 0.023 0.023 0.077 0.050 0.078 0.078 0.071 0.070 0.041 0.021 0.031 0.030 0.012 0.035 0.016 0.013 0.020 0.010 0.032 0.031 0.022 0.022 Uncontrolled Rate

grca 0.127 0.173 0.116 0.126 0.111 0.118 0.258 0.195 0.228 0.228 0.178 0.143 0.169 0.171 0.169 0.169 0.151 0.117 0.131 0.131 0.033 0.051 0.025 0.028 0.018 0.048 0.098 0.080 0.081 0.081 0.166 0.130 0.138 0.160 0.149 0.154 0.157 0.124 0.133 0.133 NOx Rate (lb/hr) 955 955 884 884 1144 1144

maza 0.075 0.077 0.075 0.075 0.073 0.073 0.078 0.055 0.067 0.067 0.062 0.058 0.073 0.062 0.084 0.075 0.082 0.077 0.067 0.067 0.017 0.040 0.036 0.016 0.042 0.018 0.064 0.057 0.053 0.053 0.067 0.066 0.087 0.065 0.078 0.074 0.075 0.071 0.060 0.060 NOx Rate (lb/MMBtu) 0.32 0.32 0.25 0.25 0.26 0.26

meve 0.058 0.042 0.077 0.060 0.059 0.056 0.072 0.062 0.059 0.059 0.086 0.088 0.100 0.087 0.067 0.063 0.089 0.077 0.075 0.075 0.116 0.099 0.113 0.115 0.111 0.111 0.113 0.092 0.096 0.096 0.092 0.081 0.106 0.092 0.090 0.088 0.091 0.074 0.077 0.077 NOx (TPY) 3096 3096 2904 2904 3607 3607

moba 0.090 0.085 0.074 0.090 0.083 0.102 0.106 0.102 0.086 0.086 0.027 0.021 0.067 0.027 0.083 0.033 0.082 0.071 0.065 0.065 0.005 0.052 0.005 0.004 0.005 0.005 0.038 0.047 0.024 0.024 0.050 0.055 0.024 0.050 0.025 0.037 0.078 0.062 0.058 0.058 Controlled Rate

pefo 0.134 0.108 0.132 0.138 0.133 0.138 0.185 0.129 0.157 0.157 0.111 0.129 0.070 0.112 0.073 0.104 0.159 0.152 0.134 0.134 0.196 0.133 0.172 0.181 0.239 0.252 0.207 0.170 0.170 0.170 0.080 0.108 0.058 0.079 0.065 0.098 0.189 0.149 0.166 0.166 NOx Rate (lb/hr) 669 151 619 174 801 220

pimo 0.064 0.050 0.062 0.063 0.065 0.066 0.061 0.050 0.051 0.051 0.039 0.046 0.050 0.039 0.048 0.046 0.074 0.063 0.061 0.061 0.004 0.033 0.007 0.004 0.008 0.005 0.022 0.034 0.021 0.021 0.043 0.048 0.063 0.043 0.060 0.055 0.053 0.048 0.043 0.043 NOx Rate (lb/MMBtu) 0.22 0.05 0.18 0.05 0.18 0.05

sagu 0.025 0.040 0.002 0.025 0.000 0.025 0.012 0.001 0.010 0.010 0.017 0.025 0.000 0.018 0.000 0.008 0.013 0.001 0.009 0.009 0.015 0.007 0.017 0.015 0.021 0.012 0.020 0.016 0.017 0.017 0.027 0.025 0.042 0.027 0.039 0.032 0.012 0.007 0.009 0.009 NOx (TPY) 2167 490 2033 572 2525 694

sian 0.023 0.031 0.058 0.023 0.060 0.027 0.114 0.094 0.089 0.089 0.049 0.090 0.034 0.052 0.041 0.023 0.097 0.085 0.082 0.082 0.084 0.060 0.085 0.083 0.085 0.073 0.061 0.047 0.061 0.061 0.111 0.082 0.077 0.112 0.104 0.133 0.090 0.067 0.072 0.072

supe 0.052 0.074 0.008 0.051 0.008 0.040 0.092 0.080 0.072 0.072 0.041 0.081 0.041 0.040 0.040 0.036 0.094 0.073 0.077 0.077 0.046 0.031 0.078 0.046 0.084 0.053 0.048 0.046 0.041 0.041 0.047 0.067 0.043 0.048 0.045 0.046 0.089 0.070 0.074 0.074 Tons/Year Removed 929 2606 871 2332 1082 2913

syca 0.076 0.078 0.109 0.076 0.108 0.092 0.122 0.100 0.097 0.097 0.069 0.099 0.128 0.068 0.126 0.084 0.113 0.094 0.095 0.095 0.034 0.050 0.034 0.034 0.033 0.032 0.068 0.074 0.050 0.050 0.097 0.088 0.101 0.098 0.093 0.082 0.117 0.103 0.094 0.094

Average 0.066 0.068 0.065 0.067 0.064 0.067 0.098 0.078 0.082 0.082 0.059 0.066 0.065 0.059 0.065 0.057 0.084 0.072 0.069 0.069 0.063 0.057 0.066 0.062 0.069 0.066 0.074 0.064 0.062 0.062 0.074 0.070 0.071 0.073 0.072 0.075 0.086 0.071 0.072 0.072 Total Cost, $/year $2,673,109 $8,235,688 $2,607,329 $8,842,201 $3,284,409 ###########

$/Ton $2,878 $3,160 $2,993 $3,792 $3,035 $3,700 

dv_max/TPY 0.13 0.17 0.13 0.14 0.13 0.14 0.26 0.20 0.23 0.23 0.18 0.14 0.17 0.17 0.17 0.17 0.16 0.15 0.13 0.13 0.20 0.13 0.17 0.18 0.24 0.25 0.21 0.17 0.17 0.17 0.17 0.13 0.14 0.16 0.15 0.15 0.19 0.15 0.17 0.17 $/Ton (incremental) $2,878 $3,317 $2,993 $4,268 $3,035 $4,094 

dv_sum/TPY 0.86 0.89 0.85 0.87 0.83 0.87 1.28 1.01 1.06 1.06 0.77 0.86 0.84 0.76 0.85 0.74 1.09 0.93 0.90 0.90 0.81 0.74 0.85 0.80 0.90 0.86 0.97 0.83 0.81 0.81 0.96 0.91 0.93 0.95 0.93 0.97 1.12 0.92 0.93 0.93 "$/Ton (incremental)" for SNCR is: ($/yr SCNR) / (tons/yr SNCR) 

"$/Ton (incremental)" for SCR is: ($/yr SCR - $/yr SCNR) / (tons/yr SCR - tons/yr SNCR) 

Table 3(b). Updated NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 6/19/2012

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 SNCR SCR SNCR SCR SNCR SCR

care 28 36 29 34 29 36 31 33 37 37 40 81 43 52 41 51 45 46 55 55 18 31 18 21 20 25 23 26 27 27 23 34 25 29 27 31 31 32 36 36

gali 1713 340 3284 3594 869 2211 170 132 209 209 8565 127 #N/A 10781 #N/A 8842 172 145 272 272 150 226 91 186 97 161 115 95 128 128 82 160 56 104 57 94 151 130 172 173 Capacity Factor 74% 74% 75% 75% 72% 72%

gila 101 186 103 124 113 143 86 103 107 108 168 392 80 211 74 177 102 86 160 160 39 71 39 48 42 54 87 143 118 120 245 101 193 276 153 384 111 96 163 165 Control Efficiency 30% 83%* 30% 80% 30% 81% *Addt'l 1% CE on Unit 2 SCR

grca 23 21 26 29 27 32 14 15 16 16 17 25 18 22 18 22 23 26 28 28 90 69 122 133 163 78 36 37 45 45 18 27 22 23 20 25 23 24 27 27 Uncontrolled Rate

maza 39 46 41 49 41 52 46 54 54 54 48 61 42 60 36 50 43 39 54 54 178 88 84 225 70 206 56 53 68 68 44 54 35 57 38 51 48 42 61 61 NOx Rate (lb/hr) 892 892 884 884 1144 1144

meve 51 85 40 62 51 68 49 48 62 62 35 40 30 43 45 60 40 39 48 49 26 36 27 32 27 34 31 33 38 38 32 44 29 40 33 43 39 40 47 47 NOx Rate (lb/MMBtu) 0.295 0.295 0.25 0.25 0.26 0.26

moba 33 42 41 41 36 37 33 29 42 42 110 168 45 138 36 116 43 42 55 56 659 68 657 829 652 804 94 64 149 149 60 64 126 74 119 103 45 48 62 62 NOx (TPY) 2890 2890 2904 2904 3607 3607

pefo 22 33 23 27 22 28 19 23 23 23 27 27 43 33 41 36 22 20 27 27 15 27 18 20 13 15 17 18 21 21 37 33 52 47 46 39 19 20 22 22 Controlled Rate

pimo 46 72 49 59 46 57 58 59 71 71 76 77 61 95 62 82 48 47 60 60 779 108 411 980 372 737 165 88 174 174 69 74 48 86 50 69 67 63 84 84 NOx Rate (lb/hr) 624 151 619 174 801 220

sagu 117 90 1642 148 #N/A 152 293 2812 360 370 171 139 #N/A 211 #N/A 491 270 2109 391 396 199 489 182 251 145 305 176 183 218 218 110 142 73 138 77 118 293 422 391 396 NOx Rate (lb/MMBtu) 0.21 0.05 0.18 0.05 0.18 0.05

sian 132 114 52 163 50 138 31 32 41 41 61 39 89 71 72 167 36 35 44 44 35 59 36 44 35 52 58 64 59 59 27 43 40 33 29 29 39 45 50 50 NOx (TPY) 2023 490 2033 572 2525 694

supe 57 48 365 72 372 94 38 37 50 50 73 44 75 93 74 105 38 41 47 47 65 114 39 81 36 72 74 65 88 88 63 53 70 77 67 83 40 43 49 49

syca 39 46 28 49 28 41 29 30 37 37 43 36 24 54 24 45 32 32 38 38 87 71 89 110 90 118 52 40 72 72 31 40 30 38 32 46 30 29 38 39 Tons/Year Removed 867 2400 871 2332 1082 2913

Total Cost, $/year $2,544,307 $8,113,266 $2,607,329 $8,842,201 $3,284,409 ########### $8,117,890 per ATP 6/23/12

$/Ton $2,935 $3,308 $2,993 $3,792 $3,035 $3,700 

$/Ton (incremental) $2,935 $3,632 $2,993 $4,268 $3,035 $4,094 

Cholla 3 - NOx

*Uses the formula: dv/ thousand TPY ≡ 1000* dv change relative to base / TPY reduction relative to base 

Table 1(b). Visibility Impairment (98th Percentile) at Each Class I Area (CIA) Within APS Cholla's Zone of Influence (300 km) for 2001-2003 Base Case Emissions and Control Options (listed in Table 2)

CIA

Table 4(b). Control Option Visibility Benefits (dv/thousand TPY)* for Each Class I Area Within APS Cholla's Zone of Influence (300 km) for 2001-2003 

CIA

2003 All Years

Unit 2 Unit 3

†million $/dv = $ per year in millions from Table 3 divided by dv benefit from Table 1(b) for each control option.

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx

Table 5(b). Control Option Cost Effectivenessin million $/dv† for Each Class I Area Within APS Cholla's Zone of Influence (300 km) for 2001-2003 

CIA 2001 Cholla 2 - NOx

2001 2002 2003

Cholla 4 - NOx

98 Change relative to base (dv) th Change relative to base (dv) Percentile -dv Unit 4

All Years Table 2. Control Options (per EPA Region 9) and Corresponding Emission Reductions Relative to Base Used in Visibility Modeling 

2001

2002 2003 All Years

98th 98 Change relative to base (dv) Percentile -dv th 98 Change relative to base (-dv) Percentile -dv th Percentile -dv

2002
Conversion (lb/day to TPY) :

0.183
Cholla units 2, 3, and 4

Table 2. Control Options (per EPA Region 9) and Corresponding Emission Reductions Relative to Base Used in Visibility Modeling 

All Units All Units

Controls

Technology 

Used

-Emissions 

(TPY, max day)

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

-Emissions 

(TPY, annual 

av) $/year

Pre-LNB SOFA Base Pre-LNB + SOFA 0 0 Pre-LNB + SOFA 0 0 $0

Pre-LNB SNCR Ctrl-1 PreLNB SNCR 929 871 PreLNB SNCR 1082 2882 $8,564,847

Pre-LNB SCR Ctrl-2 PreLNB SCR 2606 2332 PreLNB SCR 2913 7851 $27,858,991

Pre-LNB SNCR u.4 Ctrl-3 Pre-LNB + SOFA 0 0 PreLNB SNCR 1082 1082 $3,284,409

Pre-LNB SCR u.4 Ctrl-4 Pre-LNB + SOFA 0 0 PreLNB SCR 2913 2913 $10,781,102

Pre-LNB SNCR u.3 Ctrl-5 Pre-LNB + SOFA 0 871 Pre-LNB + SOFA 0 871 $2,607,329

Pre-LNB SCR u.3 Ctrl-6 Pre-LNB + SOFA 0 2332 Pre-LNB + SOFA 0 2332 $8,842,201

Pre-LNB; SO2cor Basecorr Pre-LNB+SO2corr 0 0 PreLNB + SO2c 0 0 $0

Pre-LNB SCR SO2c CTRL2 PreLNB SCR SO2c 2606 2332 PreLNB SCR SO2c 2913 7851 $27,858,991

Post-LNB SO2cor Rev Base Post-LNB+SO2corr 0 0 Post-LNB+SO2corr 0 0 $0

Post-LNB SNCR SO2c CTRL1_R PostLNB SNCR SO2c 867 871 PostLNB SNCR SO2c 1082 2820 $8,436,045

PoLN SCR 84%CE, SO2c CTRL2_R PostLNB SCR 84% CE;SO2c2428 2332 PostLNB SCR SO2c 2913 7673 $27,741,193

PoLN SCR 83%CE, SO2c ctrl2-r2 PostLNB SCR 83% CE;SO2c2400 2332 PostLNB SCR SO2c 2913 7645 $27,736,569

Table 3(a). Original NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 5/29/12 Table 3(b). Updated NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version6/19/12

SNCR SCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR

Capacity Factor 74% 74% 75% 72% 72% Capacity Factor 74% 74% 75% 75% 72% 72%

Control Efficiency 30% 84% 80% 30% 81% Control Efficiency 30% 83%* 30% 80% 30% 81% *Addt'l 1% CE on Unit 2 SCR

Uncontrolled Rate Uncontrolled Rate

NOx Rate (lb/hr) 955 955 884 1144 1144 NOx Rate (lb/hr) 892 892 884 884 1144 1144

NOx Rate (lb/MMBtu) 0.32 0.32 0.25 0.26 0.26 NOx Rate (lb/MMBtu) 0.295 0.295 0.25 0.25 0.26 0.26

NOx (TPY) 3096 3096 2904 3607 3607 NOx (TPY) 2890 2890 2904 2904 3607 3607

Controlled Rate Controlled Rate

NOx Rate (lb/hr) 669 151 174 801 220 NOx Rate (lb/hr) 624 151 619 174 801 220

NOx Rate (lb/MMBtu) 0.22 0.05 0.05 0.18 0.05 NOx Rate (lb/MMBtu) 0.21 0.05 0.18 0.05 0.18 0.05

NOx (TPY) 2167 490 572 2525 694 NOx (TPY) 2023 490 2033 572 2525 694

Tons/Year Removed 929 2606 2332 1082 2913 Tons/Year Removed 867 2400 871 2332 1082 2913

Total Cost, $/year $2,673,109 $8,235,688 $8,842,201 $3,284,409 $10,781,102 Total Cost, $/year $2,544,307 $8,113,266 $2,607,329 $8,842,201 $3,284,409 $10,781,102 $8,117,890 per ATP 6/23/12

$/Ton $2,878 $3,160 $3,792 $3,035 $3,700 $/Ton $2,935 $3,308 $2,993 $3,792 $3,035 $3,700 

$/Ton (incremental) $2,878 $3,317 $4,268 $3,035 $4,094 $/Ton (incremental) $2,935 $3,632 $2,993 $4,268 $3,035 $4,094 

Cholla units 2, 3, and 4 draft UNC results, 2012-04-30

visibility method 8, annual average background

Using dv from area with highest impact (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

visibility 

impact, dv 

visibility 

benefit, dv 

dv/TPY 

(x 1000)

$/dv 

(millions)

# areas w/ 

improvement 

≥ 0.5 dv

Pre-LNB SOFA Base 0 $0.0 4.5

Pre-LNB SNCR Ctrl-1 2882 $8.6 4.3 0.33 0.115 $26 0

Pre-LNB SCR Ctrl-2 7851 $27.9 3.7 0.83 0.105 $34 4

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 4.4 0.11 0.102 $30 0

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 4.3 0.32 0.111 $33 0

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 4.4 0.11 0.122 $25 0

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 4.3 0.28 0.121 $31 0

Pre-LNB; SO2cor Basecorr 0 $0.0 3.9

Pre-LNB SCR SO2c CTRL2 7851 $27.9 2.6 1.32 0.168 $21 8

Post-LNB SO2cor Rev Base 0 $0.0 3.7

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 3.3 0.43 0.151 $20 0

PoLN SCR 84%CE, SO2c CTRL2_R 7673 $27.7 2.6 1.13 0.147 $25 5

PoLN SCR 83%CE, SO2c Ctrl2-r2 7645 $27.7 2.6 1.12 0.147 $25 5

(same tons & costs as above)Using dv sum over all areas (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

visibility 

impact, dv 

visibility 

benefit, dv 

dv/TPY 

(x 1000)

$/dv 

(millions)

Pre-LNB SOFA Base 0 $0.0 22.3

Pre-LNB SNCR Ctrl-1 2882 $8.6 20.4 1.90 0.659 $4.5

Pre-LNB SCR Ctrl-2 7851 $27.9 16.9 5.46 0.696 $5.1

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 21.8 0.57 0.530 $5.7

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 20.4 1.92 0.659 $5.6

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 21.9 0.47 0.538 $5.6

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 20.7 1.59 0.682 $5.6

Pre-LNB; SO2cor Basecorr 0 $0.0 16.1

Pre-LNB SCR SO2c CTRL2 7851 $27.9 8.9 7.21 0.918 $3.9

Post-LNB SO2cor Rev Base 0 $0.0 14.4

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 12.3 2.16 0.766 $3.9

PoLN SCR 84%CE, SO2c CTRL2_R 7673 $27.7 8.7 5.73 0.747 $4.8

PoLN SCR 83%CE, SO2c Ctrl2-r2 7645 $27.7 8.7 5.71 0.747 $4.9

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx

Control 

Option

Unit 2 Unit 3 Unit 4

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx
Cholla units 2, 3, and 4 0

visibility method 8, annual average background (this page edited from vis8.annav sheet)

Table 1(c). Visibility Impairment (98th Percentile) for 2001-2003 Base Case Emissions and Control Options

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base Ctrl1_R

CIA Class I Area Pre-LNB 

SOFA

Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

Post-LNB 

SO2cor

Post-LNB 

SNCR 

SO2c

care Capitol Reef 1.77 1.51 1.13 1.71 1.50 1.74 1.58 1.36 0.59 1.17 0.96

gali Galiuro 0.70 0.60 0.55 0.65 0.60 0.66 0.61 0.38 0.25 0.35 0.32

gila Gila 1.13 1.09 0.99 1.13 1.09 1.13 1.12 0.61 0.37 0.53 0.47

grca Grand Canyon 2.50 2.17 1.67 2.39 2.18 2.39 2.21 1.85 0.88 1.63 1.35

maza Mazatzal 1.66 1.53 1.30 1.61 1.53 1.62 1.56 1.06 0.62 0.95 0.83

meve Mesa Verde 1.60 1.35 1.01 1.53 1.34 1.54 1.42 1.18 0.51 1.03 0.84

moba Mount Baldy 1.49 1.46 1.18 1.48 1.46 1.49 1.46 1.07 0.53 0.91 0.71

pefo Petrified Forest 4.53 4.30 3.74 4.42 4.30 4.43 4.30 3.93 2.61 3.69 3.26

pimo Pine Mountain 1.26 1.16 1.01 1.22 1.16 1.23 1.16 0.74 0.43 0.67 0.57

sagu Saguaro 0.60 0.53 0.45 0.57 0.53 0.58 0.54 0.28 0.21 0.25 0.23

sian Sierra Ancha 1.79 1.68 1.38 1.79 1.68 1.79 1.66 1.27 0.70 1.10 0.95

supe Superstition 1.66 1.56 1.28 1.64 1.56 1.65 1.59 1.16 0.63 1.03 0.89

syca Sycamore Canyon 1.65 1.50 1.17 1.62 1.50 1.63 1.53 1.24 0.59 1.10 0.88

Total 22.34 20.44 16.87 21.76 20.41 21.87 20.74 16.12 8.91 14.42 12.26

Max 4.53 4.30 3.74 4.42 4.30 4.43 4.30 3.93 2.61 3.69 3.26

# CIAs w. -dv >0.5 13 13 12 13 13 13 13 11 9 11 10

Table 4(c). Control Option Visibility Benefits (dv/thousand TPY)*

Class I Area Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 0.091 0.082 0.056 0.093 0.039 0.082 0.098 0.076 0.080 0.080

gali Galiuro 0.032 0.019 0.040 0.032 0.038 0.036 0.017 0.013 0.014 0.014

gila Gila 0.014 0.018 0.005 0.014 0.005 0.004 0.031 0.024 0.022 0.022

grca Grand Canyon 0.115 0.105 0.102 0.111 0.122 0.121 0.124 0.100 0.103 0.103

maza Mazatzal 0.047 0.047 0.055 0.048 0.054 0.046 0.057 0.043 0.044 0.044

meve Mesa Verde 0.085 0.075 0.061 0.088 0.065 0.073 0.085 0.069 0.071 0.071

moba Mount Baldy 0.008 0.039 0.002 0.008 0.001 0.009 0.069 0.070 0.051 0.050

pefo Petrified Forest 0.079 0.100 0.095 0.079 0.113 0.098 0.168 0.151 0.147 0.147

98th Percentile D-dv

pefo Petrified Forest 0.079 0.100 0.095 0.079 0.113 0.098 0.168 0.151 0.147 0.147

pimo Pine Mountain 0.033 0.031 0.031 0.033 0.026 0.040 0.039 0.034 0.031 0.031

sagu Saguaro 0.025 0.020 0.030 0.026 0.029 0.027 0.009 0.006 0.006 0.006

sian Sierra Ancha 0.040 0.053 0.000 0.041 0.000 0.059 0.072 0.053 0.054 0.054

supe Superstition 0.034 0.048 0.019 0.034 0.017 0.030 0.067 0.048 0.054 0.054

syca Sycamore Canyon 0.055 0.062 0.033 0.054 0.030 0.054 0.083 0.078 0.070 0.070

Average 0.051 0.054 0.041 0.051 0.041 0.052 0.071 0.059 0.057 0.057

dv_sum/TPY 0.659 0.696 0.530 0.659 0.538 0.682 0.918 0.766 0.747 0.747

dv_max/TPY 0.115 0.105 0.102 0.111 0.122 0.121 0.168 0.151 0.147 0.147

*Uses the formula: dv/thousand TPY = 1000 * (dv change relative to base) / (TPY reduction relative to base)

Table 5(c). Control Option Cost Effectiveness (million $/dv)†

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR 

SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 33 43 54 40 77 46 36 39 45 45

gali Galiuro 92 190 76 117 79 104 206 228 252 252

gila Gila 209 200 657 263 652 884 116 124 167 167

grca Grand Canyon 26 34 30 33 25 31 29 30 35 35

maza Mazatzal 63 76 56 78 55 82 63 70 82 82

meve Mesa Verde 35 47 50 42 46 52 42 43 51 51

moba Mount Baldy 357 92 1642 449 2607 402 52 43 71 72

pefo Petrified Forest 38 36 32 47 27 39 21 20 25 25

pimo Pine Mountain 89 115 97 112 113 94 92 87 116 116

sagu Saguaro 117 181 100 142 104 138 410 469 645 645

sian Sierra Ancha 75 67 N/A 91 N/A 64 50 57 67 67

supe Superstition 87 74 156 110 174 128 53 62 67 67

syca Sycamore Canyon 54 58 91 68 100 70 43 38 52 52

$/dv_sum 4.5 5.1 5.7 5.6 5.6 5.6 3.9 3.9 4.8 4.9

$/dv_max 25.8 33.7 29.9 33.5 24.6 31.2 21.1 19.8 24.7 24.7

Class I Area
†$/dv = $ per year from Table 3 divided by delta dv from Table 1(c) for each control option, in millions
Ctrl2_R ctrl2-r2 Basecorr Rev Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB; 

SO2cor 

Post-LNB 

SO2cor

Pre-LNB 

SNCR Pre-LNB SCR

Pre-LNB 

SNCR u.4

Pre-LNB SCR 

u.4

Pre-LNB 

SNCR u.3

Pre-LNB SCR 

u.3

Pre-LNB SCR 

SO2c

Post-LNB 

SNCR SO2c

0.56 0.56 0.00 0.00 0.26 0.64 0.06 0.27 0.03 0.19 0.77 0.22

0.24 0.24 0.00 0.00 0.09 0.15 0.04 0.09 0.03 0.09 0.14 0.04

0.37 0.37 0.00 0.00 0.04 0.14 0.01 0.04 0.00 0.01 0.24 0.07

0.84 0.84 0.00 0.00 0.33 0.83 0.11 0.32 0.11 0.28 0.97 0.28

0.61 0.61 0.00 0.00 0.14 0.37 0.06 0.14 0.05 0.11 0.44 0.12

0.49 0.49 0.00 0.00 0.25 0.59 0.07 0.26 0.06 0.17 0.67 0.19

0.52 0.53 0.00 0.00 0.02 0.30 0.00 0.02 0.00 0.02 0.54 0.20

2.56 2.56 0.00 0.00 0.23 0.78 0.10 0.23 0.10 0.23 1.32 0.43

0.43 0.43 0.00 0.00 0.10 0.24 0.03 0.10 0.02 0.09 0.30 0.10

0.20 0.20 0.00 0.00 0.07 0.15 0.03 0.08 0.03 0.06 0.07 0.02

0.69 0.69 0.00 0.00 0.11 0.41 0.00 0.12 0.00 0.14 0.56 0.15

0.61 0.61 0.00 0.00 0.10 0.38 0.02 0.10 0.02 0.07 0.53 0.14

0.57 0.57 0.00 0.00 0.16 0.48 0.04 0.16 0.03 0.13 0.65 0.22

8.69 8.70 0.00 1.90 5.46 0.57 1.92 0.47 1.59 7.21 2.16

2.56 2.56 0.00 0.33 0.83 0.11 0.32 0.11 0.28 1.32 0.43

8 8 0 4 0 0 0 0 8 0

Number of Class I Areas with visibility improvement ≥ 0.5 dv

 Change relative to base (dv)

4.50

Cholla: 98th Percentil

average of all area's (dv/annual TPY)

(sum of dv benefits over all areas) / (annual TPY)

(max dv benefit of any area) / (annual TPY)

($/yr) / (sum of dv benefits over all areas)

($/yr) / (max dv benefit of any area)

Capitol Reef Galiuro 

Basecorr Pre-LNB; SO2cor 1.36 0.38

CTRL2 Pre-LNB SCR SO2c 0.59 0.25

Rev Base Post-LNB SO2cor 1.17 0.35

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Visibility Impairment (-dv)
Rev Base Post-LNB SO2cor 1.17 0.35

Ctrl1_R Post-LNB SNCR SO2c 0.96 0.32

Ctrl2_R PoLN SCR 84%CE, SO2c 0.56 0.24

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.56 0.24
Ctrl2_R ctrl2-r2

PoLN SCR 

84%CE, SO2c

PoLN SCR 

83%CE, SO2c

0.62 0.61

0.11 0.11

0.17 0.17

0.79 0.79

0.34 0.34

0.55 0.54

0.39 0.39

1.13 1.12

0.24 0.24

0.04 0.04

0.42 0.41

0.41 0.41

0.54 0.54

5.73 5.71

1.13 1.12

5 5

Cholla: 98th Percentile Visibility Impairment, IMPROVE Method 8, Ann. Avg. Bkgd. 

Galiuro Gila Grand Canyon Mazatzal Mesa Verde Mount Baldy Petrified 

Forest Pine Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

0.38 0.61 1.85 1.06 1.18 1.07 3.93 0.74 0.28 1.27 1.16 1.24

0.25 0.37 0.88 0.62 0.51 0.53 2.61 0.43 0.21 0.70 0.63 0.59

0.35 0.53 1.63 0.95 1.03 0.91 3.69 0.67 0.25 1.10 1.03 1.10
0.35 0.53 1.63 0.95 1.03 0.91 3.69 0.67 0.25 1.10 1.03 1.10

0.32 0.47 1.35 0.83 0.84 0.71 3.26 0.57 0.23 0.95 0.89 0.88

0.24 0.37 0.84 0.61 0.49 0.52 2.56 0.43 0.20 0.69 0.61 0.57

0.24 0.37 0.84 0.61 0.49 0.53 2.56 0.43 0.20 0.69 0.61 0.57
1.40

Cholla: Visibility Benefit of Controls, IMPROVE Method 8, Ann. Avg. Bkgd. 

Capitol Reef Galiuro Gila Grand 

Canyon Mazatzal Mesa Verde Mount Baldy 

Petrified 

Forest

Pine 

Mountain Saguaro Sierra Ancha 

Basecorr Pre-LNB; SO2cor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

CTRL2 Pre-LNB SCR SO2c 0.77 0.14 0.24 0.97 0.44 0.67 0.54 1.32 0.30 0.07 0.56

Rev Base Post-LNB SO2cor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

Visibility Benefit, dv
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Ctrl1_R Post-LNB SNCR SO2c 0.22 0.04 0.07 0.28 0.12 0.19 0.20 0.43 0.10 0.02 0.15

Ctrl2_R PoLN SCR 84%CE, SO2c 0.62 0.11 0.17 0.79 0.34 0.55 0.39 1.13 0.24 0.04 0.42

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.61 0.11 0.17 0.79 0.34 0.54 0.39 1.12 0.24 0.04 0.41
Sierra Ancha Superstition Sycamore 

Canyon 

0.00 0.00 0.00

0.56 0.53 0.65

0.00 0.00 0.00
0.00 0.00 0.00

0.15 0.14 0.22

0.42 0.41 0.54

0.41 0.41 0.54
Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6

care 1.530 1.306 1.105 1.447 1.304 1.464 1.352

gali 0.824 0.821 0.769 0.824 0.823 0.822 0.822

gila 0.932 0.853 0.801 0.905 0.852 0.913 0.860

grca 3.707 3.391 2.488 3.598 3.390 3.622 3.469

maza 1.543 1.362 1.062 1.467 1.361 1.480 1.398

meve 1.172 0.988 0.821 1.103 0.988 1.106 1.015

moba 1.529 1.384 1.019 1.518 1.381 1.520 1.402

pefo 4.699 4.439 3.803 4.604 4.436 4.616 4.474

pimo 1.109 0.970 0.812 1.058 0.970 1.066 0.992

sagu 0.722 0.700 0.553 0.722 0.699 0.722 0.722

sian 1.682 1.560 1.451 1.633 1.560 1.642 1.573

supe 1.676 1.582 1.266 1.654 1.578 1.655 1.628

syca 1.612 1.429 1.043 1.546 1.427 1.565 1.484

Total 22.737 20.785 16.993 22.079 20.769 22.193 21.191

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 0.078 0.054 0.077 0.078 0.076 0.076 0.089

gali 0.001 0.007 0.000 0.000 0.002 0.001 0.014

gila 0.027 0.017 0.025 0.027 0.022 0.031 0.032

grca 0.110 0.155 0.101 0.109 0.098 0.102 0.218

maza 0.063 0.061 0.070 0.062 0.072 0.062 0.060

meve 0.064 0.045 0.064 0.063 0.076 0.067 0.064

moba 0.050 0.065 0.010 0.051 0.010 0.054 0.090

pefo 0.090 0.114 0.088 0.090 0.095 0.096 0.165

pimo 0.048 0.038 0.047 0.048 0.049 0.050 0.044

sagu 0.008 0.022 0.000 0.008 0.000 0.000 0.007

sian 0.042 0.029 0.045 0.042 0.046 0.047 0.086

supe 0.033 0.052 0.020 0.034 0.024 0.021 0.070

syca 0.063 0.072 0.061 0.064 0.054 0.055 0.083

Average 0.052 0.056 0.047 0.052 0.048 0.051 0.079

dv_max/TPY 0.11 0.16 0.10 0.11 0.10 0.10 0.22

dv_sum/TPY 0.68 0.73 0.61 0.68 0.62 0.66 1.02

*Uses the formula: dv/thousand TPY ≡

2001

Table 1(c). Visibility Impairment (98th Percentile) at Each Class I Area (CIA) Within APS Cholla's Zone of Influence (300 km) 

CIA

CIA

Table 4(c). Control Option Visibility Benefits (dv/thousand TPY)* for Each Class I Area Within APS Cholla's Zone of Influenc

1000.* (dv change relative to base/TPY reduction relative to bas

98th Percentile 
2001

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 38 66 40 48 40 50 40

gali 2855 507 #N/A 10781 1304 4421 253

gila 108 213 122 135 137 123 111

grca 27 23 30 34 31 37 16

maza 47 58 43 59 41 61 59

meve 47 79 48 59 40 56 56

moba 59 55 299 73 290 70 40

pefo 33 31 35 41 31 39 21

pimo 62 94 64 78 61 76 81

sagu 389 165 #N/A 469 #N/A #N/A 516

sian 70 121 67 88 65 81 41

supe 91 68 149 110 124 184 51

syca 47 49 50 58 55 69 43

†million $/dv = $ per year in millions from Table 3 divided by dv benefit from Table 1(c) for each control option.

Table 5(c). Control Option Cost Effectivenessin million $/dv† for Each Class I Area Within APS Cholla's Zone of Influence (3

CIA
Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2

1.189 0.488 1.031 0.825 0.481 0.481 0.224 0.425

0.395 0.285 0.386 0.329 0.285 0.285 0.003 0.055

0.554 0.302 0.495 0.431 0.293 0.293 0.079 0.131

3.195 1.487 2.879 2.415 1.39 1.397 0.316 1.219

1.083 0.609 0.989 0.869 0.59 0.591 0.181 0.481

0.86 0.361 0.745 0.593 0.339 0.34 0.184 0.351

1.25 0.545 1.07 0.836 0.523 0.526 0.145 0.510

3.931 2.635 3.7 3.375 2.574 2.578 0.260 0.896

0.733 0.391 0.654 0.551 0.376 0.377 0.139 0.297

0.307 0.253 0.293 0.276 0.241 0.242 0.022 0.169

1.358 0.681 1.196 0.991 0.655 0.657 0.122 0.231

1.249 0.702 1.107 0.94 0.686 0.688 0.094 0.410

1.241 0.587 1.107 0.916 0.555 0.557 0.183 0.569

17.345 9.326 15.652 13.347 8.988 9.012 1.952 5.744

CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

0.073 0.072 0.072 0.060 0.039 0.057 0.058 0.060

0.020 0.013 0.013 0.000 0.017 0.000 0.000 0.000

0.023 0.026 0.026 0.001 0.005 0.001 0.001 0.001

0.165 0.194 0.194 0.146 0.118 0.140 0.141 0.140

0.043 0.052 0.052 0.048 0.046 0.047 0.047 0.046

0.054 0.053 0.053 0.079 0.077 0.061 0.087 0.065

0.083 0.071 0.071 0.039 0.023 0.064 0.039 0.078

0.115 0.147 0.147 0.121 0.115 0.093 0.122 0.088

0.037 0.036 0.036 0.037 0.034 0.038 0.037 0.037

0.006 0.007 0.007 0.004 0.017 0.000 0.004 0.001

0.073 0.071 0.071 0.046 0.069 0.075 0.045 0.114

0.059 0.055 0.055 0.023 0.056 0.031 0.024 0.031

0.068 0.072 0.072 0.054 0.093 0.002 0.053 0.001

0.063 0.067 0.067 0.051 0.054 0.047 0.051 0.051

0.16 0.19 0.19 0.15 0.12 0.14 0.14 0.14

0.82 0.87 0.87 0.66 0.71 0.61 0.66 0.66

2002

olla's Zone of Influence (300 km) for 2001-2003 Base Case Emissions and Control Options (listed in Table 2)

hin APS Cholla's Zone of Influence (300 km) for 2001-2003 

e/TPY reduction relative to base)

2001

-dv
CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

41 50 50 49 91 53 64 50

148 275 275 8565 211 #N/A 10781 #N/A

132 137 137 4282 714 3284 5391 2607

18 19 19 20 30 22 26 21

70 70 70 63 78 64 78 65

56 68 68 38 46 50 42 46

36 51 51 76 154 48 95 38

26 25 25 24 31 33 30 34

82 100 100 81 105 80 101 81

496 533 544 714 211 #N/A 898 2607

41 51 51 65 51 41 82 26

51 66 66 132 63 97 152 97

44 50 50 55 38 1642 70 2607

1(c) for each control option.

APS Cholla's Zone of Influence (300 km) for 2001-2003 

2002
Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

0.083 0.226 0.066 0.178 0.701 0.206 0.550 0.550

0.000 0.001 0.002 0.002 0.110 0.057 0.101 0.101

0.027 0.080 0.019 0.072 0.252 0.064 0.202 0.202

0.109 0.317 0.085 0.238 1.708 0.464 1.489 1.482

0.076 0.182 0.063 0.145 0.474 0.120 0.399 0.398

0.069 0.184 0.066 0.157 0.499 0.152 0.406 0.405

0.011 0.148 0.009 0.127 0.705 0.234 0.547 0.544

0.095 0.263 0.083 0.225 1.296 0.325 1.126 1.122

0.051 0.139 0.043 0.117 0.342 0.103 0.278 0.277

0.000 0.023 0.000 0.000 0.054 0.017 0.052 0.051

0.049 0.122 0.040 0.109 0.677 0.205 0.541 0.539

0.022 0.098 0.021 0.048 0.547 0.167 0.421 0.419

0.066 0.185 0.047 0.128 0.654 0.191 0.552 0.550

0.658 1.968 0.544 1.546 8.019 2.305 6.664 6.640

Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.060 0.063 0.052 0.052 0.052 0.143 0.099 0.146

0.000 0.016 0.015 0.010 0.010 0.019 0.012 0.024

0.000 0.032 0.027 0.023 0.023 0.062 0.047 0.062

0.139 0.114 0.091 0.098 0.098 0.043 0.046 0.030

0.045 0.058 0.052 0.049 0.049 0.027 0.034 0.062

0.059 0.089 0.073 0.073 0.073 0.102 0.085 0.100

0.048 0.067 0.059 0.054 0.054 0.003 0.040 0.004

0.120 0.141 0.115 0.117 0.117 0.110 0.100 0.097

0.036 0.056 0.048 0.046 0.046 0.018 0.021 0.003

0.000 0.011 0.007 0.008 0.008 0.009 0.007 0.015

0.056 0.074 0.061 0.062 0.062 0.061 0.045 0.050

0.024 0.069 0.054 0.060 0.060 0.039 0.029 0.051

0.045 0.094 0.096 0.069 0.069 0.034 0.029 0.049

0.049 0.068 0.058 0.055 0.055 0.052 0.046 0.053

0.14 0.14 0.12 0.12 0.12 0.14 0.10 0.15

0.63 0.88 0.75 0.72 0.72 0.67 0.59 0.69

2002

 Change relative to base (-dv)
Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

63 56 57 69 69 21 36 21

8842 226 196 347 347 156 296 126

8842 111 111 160 160 48 75 49

27 31 33 37 37 69 78 100

84 61 57 73 74 108 104 49

64 40 41 50 50 29 42 30

80 53 51 67 67 856 89 821

31 25 26 31 31 27 35 31

107 63 63 78 79 168 170 1095

8842 328 422 447 455 317 536 205

67 48 49 58 58 48 78 61

158 51 56 61 61 76 122 60

84 38 31 52 52 87 124 62

2002
Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr

1.149 0.975 0.842 1.087 0.981 1.097 1.009 0.826

0.718 0.717 0.586 0.718 0.717 0.718 0.717 0.358

1.137 1.135 1.098 1.136 1.135 1.136 1.136 0.631

2.585 2.165 1.659 2.434 2.175 2.463 2.260 1.743

1.672 1.535 1.314 1.621 1.534 1.632 1.567 1.056

1.595 1.368 0.994 1.529 1.341 1.538 1.457 1.205

1.465 1.352 1.284 1.396 1.352 1.397 1.354 1.072

4.195 3.845 3.291 4.094 3.841 4.118 3.914 3.563

1.420 1.314 1.155 1.379 1.313 1.388 1.337 0.934

0.526 0.514 0.394 0.526 0.514 0.525 0.525 0.249

1.925 1.793 1.380 1.844 1.793 1.826 1.794 1.293

1.758 1.693 1.316 1.724 1.687 1.731 1.702 1.188

2.182 2.026 1.455 2.180 2.027 2.181 2.077 1.479

22.327 20.432 16.768 21.668 20.410 21.750 20.849 15.597

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

0.148 0.127 0.128 0.126 0.093 0.107 0.107 0.091

0.019 0.022 0.022 0.020 0.022 0.020 0.020 0.032

0.062 0.057 0.057 0.031 0.033 0.025 0.025 0.014

0.039 0.029 0.060 0.075 0.061 0.062 0.062 0.115

0.027 0.060 0.032 0.048 0.043 0.040 0.040 0.047

0.101 0.098 0.098 0.109 0.087 0.092 0.092 0.085

0.004 0.003 0.003 0.034 0.044 0.025 0.025 0.008

0.097 0.101 0.145 0.184 0.149 0.156 0.156 0.079

0.018 0.002 0.019 0.018 0.023 0.017 0.018 0.033

0.009 0.015 0.011 0.015 0.012 0.012 0.012 0.025

0.062 0.046 0.054 0.043 0.046 0.045 0.045 0.040

0.039 0.053 0.045 0.035 0.026 0.030 0.030 0.034

0.034 0.054 0.033 0.059 0.052 0.048 0.048 0.055

0.051 0.051 0.054 0.061 0.053 0.052 0.052 0.051

0.15 0.13 0.14 0.18 0.15 0.16 0.16 0.12

0.66 0.67 0.71 0.80 0.69 0.68 0.68 0.66

2003

98th Percentile -dv
Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

25 23 30 28 32 34 34 33

193 137 173 176 138 183 184 92

60 52 67 115 91 144 146 209

95 104 64 47 49 59 59 26

135 50 118 75 70 91 91 63

37 31 39 33 34 39 39 35

980 869 1105 103 69 144 144 357

38 30 26 19 20 23 23 38

211 1304 196 193 132 207 207 89

399 201 340 244 248 305 305 117

60 65 71 82 64 81 81 75

95 57 83 102 117 122 122 87

108 55 115 60 57 76 76 54

2003
CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.332 0.712 0.565 0.31 0.312 0.174 0.307 0.062

0.235 0.314 0.271 0.234 0.234 0.001 0.132 0.000

0.38 0.553 0.477 0.38 0.38 0.002 0.039 0.001

0.849 1.543 1.286 0.792 0.797 0.420 0.926 0.151

0.598 0.95 0.803 0.571 0.573 0.137 0.358 0.051

0.51 1.044 0.837 0.486 0.488 0.227 0.601 0.066

0.543 0.942 0.776 0.529 0.53 0.113 0.181 0.069

2.456 3.278 2.953 2.382 2.387 0.350 0.904 0.101

0.495 0.835 0.701 0.481 0.482 0.106 0.265 0.041

0.164 0.216 0.196 0.154 0.155 0.012 0.132 0.000

0.713 1.165 0.994 0.686 0.688 0.132 0.545 0.081

0.646 1.074 0.923 0.617 0.619 0.065 0.442 0.034

0.742 1.27 0.999 0.741 0.741 0.156 0.727 0.002

8.663 13.896 11.781 8.363 8.386 1.895 5.559 0.659

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

0.082 0.056 0.093 0.039 0.082 0.098 0.076 0.080

0.019 0.040 0.032 0.038 0.036 0.017 0.013 0.014

0.018 0.005 0.014 0.005 0.004 0.031 0.024 0.022

0.105 0.102 0.111 0.122 0.121 0.124 0.100 0.103

0.047 0.055 0.048 0.054 0.046 0.057 0.043 0.044

0.075 0.061 0.088 0.065 0.073 0.085 0.069 0.071

0.039 0.002 0.008 0.001 0.009 0.069 0.070 0.051

0.100 0.095 0.079 0.113 0.098 0.168 0.151 0.147

0.031 0.031 0.033 0.026 0.040 0.039 0.034 0.031

0.020 0.030 0.026 0.029 0.027 0.009 0.006 0.006

0.053 0.000 0.041 0.000 0.059 0.072 0.053 0.054

0.048 0.019 0.034 0.017 0.030 0.067 0.048 0.054

0.062 0.033 0.054 0.030 0.054 0.083 0.078 0.070

0.054 0.041 0.051 0.041 0.052 0.071 0.059 0.057

0.11 0.10 0.11 0.12 0.12 0.17 0.15 0.15

0.70 0.53 0.66 0.54 0.68 0.92 0.77 0.75

2002

All Years
Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

43 54 40 77 46 36 39 45

190 76 117 79 104 206 228 252

200 657 263 652 884 116 124 167

34 30 33 25 31 29 30 35

76 56 78 55 82 63 70 82

47 50 42 46 52 42 43 51

92 1642 449 2607 402 52 43 71

36 32 47 27 39 21 20 25

115 97 112 113 94 92 87 116

181 100 142 104 138 410 469 645

67 #N/A 91 #N/A 64 50 57 67

74 156 110 174 128 53 62 67

58 91 68 100 70 43 38 52

All Years
Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base

0.168 0.052 0.140 0.494 0.147 0.402 0.400 2.242

0.001 0.000 0.001 0.123 0.043 0.080 0.080 0.583

0.002 0.001 0.001 0.251 0.076 0.173 0.173 1.258

0.410 0.122 0.325 0.894 0.257 0.751 0.746 1.747

0.138 0.040 0.105 0.458 0.147 0.379 0.377 1.582

0.254 0.057 0.138 0.695 0.207 0.558 0.556 1.840

0.113 0.068 0.111 0.529 0.166 0.413 0.412 1.477

0.354 0.077 0.281 1.107 0.325 0.896 0.891 4.863

0.107 0.032 0.083 0.439 0.134 0.354 0.353 1.167

0.012 0.001 0.001 0.085 0.020 0.062 0.061 0.397

0.132 0.099 0.131 0.580 0.171 0.479 0.477 1.595

0.071 0.027 0.056 0.542 0.151 0.457 0.455 1.309

0.155 0.001 0.105 0.737 0.271 0.529 0.529 1.223

1.917 0.577 1.478 6.934 2.115 5.533 5.510 21.283

ctrl2_r2

0.080

0.014

0.022

0.103

0.044

0.071

0.050

0.147

0.031

0.006

0.054

0.054

0.070

0.057

0.15

0.75

 Change relative to base (-dv)
ctrl2_r2

45

252

167

35

82

51

72

25

116

645

67

67

52
Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2

1.830 1.464 2.084 1.810 2.131 1.943 1.659 0.667

0.528 0.489 0.557 0.527 0.564 0.532 0.344 0.186

1.080 0.889 1.191 1.077 1.208 1.126 0.651 0.409

1.623 1.388 1.714 1.634 1.722 1.608 1.25 0.661

1.503 1.313 1.515 1.502 1.530 1.507 1.024 0.651

1.547 1.170 1.732 1.546 1.755 1.612 1.47 0.616

1.467 1.163 1.473 1.466 1.474 1.469 0.782 0.512

4.547 4.074 4.758 4.579 4.775 4.525 4.275 2.83

1.116 1.003 1.164 1.116 1.165 1.122 0.536 0.392

0.370 0.345 0.381 0.370 0.384 0.371 0.25 0.136

1.418 1.238 1.541 1.415 1.555 1.470 1 0.66

1.196 1.081 1.254 1.196 1.263 1.203 0.794 0.521

1.124 0.998 1.170 1.123 1.176 1.146 0.876 0.414

19.349 16.615 20.534 19.361 20.702 19.634 14.911 8.655

98th Percentile D-dv

 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

1.455 1.193 0.637 0.639 0.412 0.778 0.158

0.335 0.274 0.183 0.184 0.055 0.094 0.026

0.578 0.485 0.386 0.388 0.178 0.369 0.067

1.107 0.934 0.634 0.636 0.124 0.359 0.033

0.929 0.809 0.623 0.625 0.079 0.269 0.067

1.283 1.037 0.576 0.58 0.293 0.670 0.108

0.699 0.576 0.506 0.506 0.010 0.314 0.004

3.959 3.54 2.759 2.764 0.316 0.789 0.105

0.525 0.461 0.391 0.391 0.051 0.164 0.003

0.222 0.188 0.131 0.131 0.027 0.052 0.016

0.979 0.848 0.635 0.637 0.177 0.357 0.054

0.748 0.676 0.521 0.521 0.113 0.228 0.055

0.769 0.621 0.402 0.403 0.099 0.225 0.053

13.588 11.642 8.384 8.405 1.934 4.668 0.749

2003

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

0.432 0.111 0.299 0.992 0.262 0.818 0.816

0.056 0.019 0.051 0.158 0.061 0.152 0.151

0.181 0.050 0.132 0.242 0.093 0.192 0.190

0.113 0.025 0.139 0.589 0.173 0.473 0.471

0.080 0.052 0.075 0.373 0.120 0.306 0.304

0.294 0.085 0.228 0.854 0.246 0.707 0.703

0.011 0.003 0.008 0.270 0.123 0.193 0.193

0.284 0.088 0.338 1.445 0.419 1.200 1.195

0.051 0.002 0.045 0.144 0.064 0.134 0.134

0.027 0.013 0.026 0.114 0.034 0.091 0.091

0.180 0.040 0.125 0.340 0.131 0.344 0.342

0.113 0.046 0.106 0.273 0.072 0.227 0.227

0.100 0.047 0.077 0.462 0.148 0.367 0.366

1.922 0.581 1.649 6.256 1.946 5.204 5.183

 Change relative to base (dv)

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6

1.770 1.508 1.129 1.709 1.499 1.736 1.578

0.696 0.603 0.549 0.653 0.604 0.663 0.611

1.133 1.092 0.994 1.128 1.092 1.129 1.123

2.497 2.165 1.671 2.387 2.175 2.391 2.214

1.664 1.528 1.298 1.605 1.525 1.617 1.556

1.595 1.350 1.007 1.529 1.339 1.538 1.424

1.486 1.462 1.182 1.484 1.462 1.485 1.464

4.526 4.299 3.744 4.423 4.297 4.428 4.298

1.256 1.160 1.013 1.222 1.160 1.233 1.162

0.603 0.530 0.449 0.570 0.527 0.578 0.539

1.794 1.680 1.380 1.794 1.675 1.794 1.656

1.661 1.563 1.284 1.640 1.563 1.646 1.592

1.654 1.496 1.171 1.618 1.496 1.628 1.527

22.335 20.436 16.871 21.762 20.414 21.866 20.744

98th Percentile D-dv

Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

1.358 0.586 1.171 0.956 0.555 0.558 0.262

0.383 0.248 0.353 0.316 0.243 0.243 0.093

0.609 0.369 0.533 0.465 0.367 0.367 0.041

1.852 0.878 1.634 1.353 0.84 0.843 0.332

1.059 0.615 0.95 0.83 0.613 0.613 0.136

1.179 0.51 1.031 0.837 0.486 0.488 0.245

1.07 0.531 0.912 0.714 0.523 0.526 0.024

3.928 2.606 3.686 3.259 2.561 2.563 0.227

0.735 0.431 0.671 0.574 0.431 0.431 0.096

0.275 0.207 0.246 0.228 0.203 0.203 0.073

1.266 0.704 1.101 0.952 0.686 0.687 0.114

1.162 0.634 1.025 0.889 0.612 0.613 0.098

1.241 0.592 1.103 0.882 0.566 0.568 0.158

16.117 8.911 14.416 12.255 8.686 8.703 1.899

All Years

ercentile D-dv

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R

0.641 0.061 0.271 0.034 0.192 0.772 0.215

0.147 0.043 0.092 0.033 0.085 0.135 0.037

0.139 0.005 0.041 0.004 0.010 0.24 0.068

0.826 0.110 0.322 0.106 0.283 0.974 0.281

0.366 0.059 0.139 0.047 0.108 0.444 0.12

0.588 0.066 0.256 0.057 0.171 0.669 0.194

0.304 0.002 0.024 0.001 0.022 0.539 0.198

0.782 0.103 0.229 0.098 0.228 1.322 0.427

0.243 0.034 0.096 0.023 0.094 0.304 0.097

0.154 0.033 0.076 0.025 0.064 0.068 0.018

0.414 0.000 0.119 0.000 0.138 0.562 0.149

0.377 0.021 0.098 0.015 0.069 0.528 0.136

0.483 0.036 0.158 0.026 0.127 0.649 0.221

5.464 0.573 1.921 0.469 1.591 7.206 2.161

 Change relative to base (dv)

CTRL2_R ctrl2_r2

0.616 0.613

0.11 0.11

0.166 0.166

0.794 0.791

0.337 0.337

0.545 0.543

0.389 0.386

1.125 1.123

0.24 0.24

0.043 0.043

0.415 0.414

0.413 0.412

0.537 0.535

5.730 5.713
Cholla units 2, 3, and 4

Table 2. Control Options (per EPA Region 9) and Corresponding Emission Reductions Relative to Base Used in Visibility Modeling 

All Units All Units

Controls Technology Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

Technology 

Used

-Emissions 

(TPY, max day)

-Emissions 

(TPY, annual 

av) $/year

Pre-LNB SOFA Base Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 0 $0

Pre-LNB SNCR Ctrl-1 PreLNB SNCR 929 PreLNB SNCR 871 PreLNB SNCR 1082 2882 $8,564,847

Pre-LNB SCR Ctrl-2 PreLNB SCR 2606 PreLNB SCR 2332 PreLNB SCR 2913 7851 $27,858,991

Pre-LNB SNCR u.4 Ctrl-3 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SNCR 1082 1082 $3,284,409

Pre-LNB SCR u.4 Ctrl-4 Pre-LNB + SOFA 0 Pre-LNB + SOFA 0 PreLNB SCR 2913 2913 $10,781,102

Pre-LNB SNCR u.3 Ctrl-5 Pre-LNB + SOFA 0 PreLNB SNCR 871 Pre-LNB + SOFA 0 871 $2,607,329

Pre-LNB SCR u.3 Ctrl-6 Pre-LNB + SOFA 0 PreLNB SCR 2332 Pre-LNB + SOFA 0 2332 $8,842,201

Pre-LNB; SO2cor Basecorr Pre-LNB+SO2corr 0 PreLNB + SO2c 0 PreLNB + SO2c 0 0 $0

Pre-LNB SCR SO2c CTRL2 PreLNB SCR SO2c 2606 PreLNB SCR SO2c 2332 PreLNB SCR SO2c 2913 7851 $27,858,991

Post-LNB SO2cor Rev Base Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 Post-LNB+SO2corr 0 0 $0

Post-LNB SNCR SO2cCTRL1_R PostLNB SNCR SO2c 867 PostLNB SNCR SO2c 871 PostLNB SNCR SO2c 1082 2820 $8,436,045

PoLN SCR 84%CE, SO2cCTRL2_R PostLNB SCR 84% CE;SO2c2428 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7673 $27,741,193

PoLN SCR 83%CE, SO2c ctrl2-r2 PostLNB SCR 83% CE;SO2c2400 PostLNB SCR SO2c 2332 PostLNB SCR SO2c 2913 7645 $27,736,569

Table 3(a). Original NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version 5/29/12 Table 3(b). Updated NOx Control Technologies for Cholla Units 2-4 (from Andover Technology Partners Report Table 4-7) version6/19/12

SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR SNCR SCR

Capacity Factor 74% 74% 75% 75% 72% 72% Capacity Factor 74% 74% 75% 75% 72% 72%

Control Efficiency 30% 84% 30% 80% 30% 81% Control Efficiency 30% 83%* 30% 80% 30% 81% *Addt'l 1% CE on Unit 2 SCR

Uncontrolled Rate Uncontrolled Rate

NOx Rate (lb/hr) 955 955 884 884 1144 1144 NOx Rate (lb/hr) 892 892 884 884 1144 1144

NOx Rate (lb/MMBtu) 0.32 0.32 0.25 0.25 0.26 0.26 NOx Rate (lb/MMBtu) 0.295 0.295 0.25 0.25 0.26 0.26

NOx (TPY) 3096 3096 2904 2904 3607 3607 NOx (TPY) 2890 2890 2904 2904 3607 3607

Controlled Rate Controlled Rate

NOx Rate (lb/hr) 669 151 619 174 801 220 NOx Rate (lb/hr) 624 151 619 174 801 220

NOx Rate (lb/MMBtu) 0.22 0.05 0.18 0.05 0.18 0.05 NOx Rate (lb/MMBtu) 0.21 0.05 0.18 0.05 0.18 0.05

NOx (TPY) 2167 490 2033 572 2525 694 NOx (TPY) 2023 490 2033 572 2525 694

Tons/Year Removed 929 2606 871 2332 1082 2913 Tons/Year Removed 867 2400 871 2332 1082 2913

Total Cost, $/year $2,673,109 $8,235,688 $2,607,329 $8,842,201 $3,284,409 $10,781,102 Total Cost, $/year $2,544,307 $8,113,266 $2,607,329 $8,842,201 $3,284,409 $10,781,102 $8,117,890 per ATP 6/23/12

$/Ton $2,878 $3,160 $2,993 $3,792 $3,035 $3,700 $/Ton $2,935 $3,308 $2,993 $3,792 $3,035 $3,700 

$/Ton (incremental) $2,878 $3,317 $2,993 $4,268 $3,035 $4,094 $/Ton (incremental) $2,935 $3,632 $2,993 $4,268 $3,035 $4,094 

Cholla units 2, 3, and 4 draft UNC results, 2012-04-30

visibility method 8, 20% best background

Using dv from area with highest impact (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv 

dv/TPY 

(x 1000)

$/dv 

(millions)

# areas w/ 

improvement 

≥ 0.5 dv

Pre-LNB SOFA Base 0 $0.0 5.6

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 5.3 0.43 0.149 $20 0

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 4.6 1.08 0.137 $26 5

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 5.4 0.15 0.142 $21 0

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 5.3 0.42 0.142 $26 0

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 5.4 0.15 0.170 $18 0

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 5.3 0.37 0.157 $24 0

Pre-LNB; SO2cor Basecorr 0 $0.0 4.8

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 3.3 1.57 0.199 $18 9

Post-LNB SO2cor Rev Base 0 $0.0 4.5

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 4.1 0.47 0.168 $18 0

PoLN SCR 84%CE, SO2cCTRL2_R 7673 $27.7 $3,616 3.2 1.34 0.174 $21 8

PoLN SCR 83%CE, SO2cCtrl2-r2 7645 $27.7 $3,628 3.2 1.34 0.175 $21 8

(same tons & costs as above) Using dv sum over all areas (13 areas)

Controls

Control 

Option

ton/yr 

reduction

cost, $/yr 

(millions)

$/ton 

reduction

visibility 

impact, dv 

visibility 

benefit, dv 

dv/TPY 

(x 1000)

$/dv 

(millions)

Pre-LNB SOFA Base 0 $0.0 28.1

Pre-LNB SNCR Ctrl-1 2882 $8.6 $2,972 25.7 2.37 0.822 $3.6

Pre-LNB SCR Ctrl-2 7851 $27.9 $3,548 21.3 6.77 0.862 $4.1

Pre-LNB SNCR u.4 Ctrl-3 1082 $3.3 $3,035 27.4 0.72 0.662 $4.6

Pre-LNB SCR u.4 Ctrl-4 2913 $10.8 $3,701 25.7 2.39 0.821 $4.5

Pre-LNB SNCR u.3 Ctrl-5 871 $2.6 $2,993 27.5 0.59 0.673 $4.4

Pre-LNB SCR u.3 Ctrl-6 2332 $8.8 $3,792 26.2 1.92 0.823 $4.6

Pre-LNB; SO2cor Basecorr 0 $0.0 20.4

Pre-LNB SCR SO2c CTRL2 7851 $27.9 $3,548 11.4 9.04 1.152 $3.1

Post-LNB SO2cor Rev Base 0 $0.0 18.3

Post-LNB SNCR SO2c CTRL1_R 2820 $8.4 $2,992 15.6 2.71 0.960 $3.1

PoLN SCR 84%CE, SO2cCTRL2_R 7673 $27.7 $3,616 11.1 7.23 0.943 $3.8

PoLN SCR 83%CE, SO2cCtrl2-r2 7645 $27.7 $3,628 11.1 7.21 0.943 $3.8

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx

Control 

Option

Unit 2 Unit 3 Unit 4

Cholla 2 - NOx Cholla 3 - NOx Cholla 4 - NOx
Cholla units 2, 3, and 4

visibility method 8, 20% best background (this page edited from vis8.20best sheet)

Table 1(d). Visibility Impairment (98th Percentile) for 2001-2003 Base Case Emissions and Control Options

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2 Rev Base Ctrl1_R

CIA Pre-LNB 

SOFA

Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

Post-LNB 

SO2cor

Post-LNB 

SNCR 

SO2c

care Capitol Reef 2.18 1.87 1.41 2.12 1.86 2.15 1.96 1.69 0.74 1.46 1.19

gali Galiuro 0.88 0.77 0.69 0.83 0.77 0.84 0.78 0.49 0.32 0.45 0.40

gila Gila 1.48 1.42 1.30 1.47 1.42 1.47 1.46 0.79 0.48 0.70 0.61

grca Grand Canyon 3.35 2.92 2.27 3.21 2.94 3.21 2.98 2.51 1.21 2.22 1.85

maza Mazatzal 2.07 1.90 1.62 2.00 1.89 2.01 1.93 1.33 0.77 1.19 1.03

meve Mesa Verde 2.04 1.73 1.31 1.95 1.72 1.96 1.84 1.53 0.66 1.34 1.08

moba Mount Baldy 1.94 1.91 1.55 1.94 1.91 1.94 1.92 1.41 0.70 1.21 0.95

pefo Petrified Forest 5.56 5.26 4.59 5.40 5.26 5.41 5.26 4.82 3.25 4.53 4.06

pimo Pine Mountain 1.55 1.44 1.27 1.53 1.44 1.54 1.45 0.92 0.54 0.85 0.73

sagu Saguaro 0.74 0.64 0.55 0.70 0.64 0.71 0.66 0.33 0.25 0.30 0.28

sian Sierra Ancha 2.18 2.06 1.69 2.17 2.06 2.18 2.03 1.56 0.87 1.36 1.17

supe Superstition 2.03 1.91 1.58 2.00 1.91 2.01 1.95 1.43 0.79 1.27 1.10

syca Sycamore Canyon 2.12 1.91 1.52 2.08 1.91 2.09 1.97 1.59 0.78 1.42 1.15

Total 28.10 25.73 21.33 27.39 25.71 27.52 26.18 20.40 11.36 18.30 15.59

Max 5.56 5.26 4.59 5.40 5.26 5.41 5.26 4.82 3.25 4.53 4.06

# CIAs w. -dv >0.5 13 13 13 13 13 13 13 11 10 11 11

Table 4(d). Control Option Visibility Benefits (dv/thousand TPY)*

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB 

SNCR

Pre-LNB 

SCR

Pre-LNB 

SNCR u.4

Pre-LNB 

SCR u.4

Pre-LNB 

SNCR u.3

Pre-LNB 

SCR u.3

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR 

SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 0.106 0.098 0.055 0.108 0.031 0.094 0.122 0.095 0.100 0.100

gali Galiuro 0.040 0.024 0.049 0.039 0.047 0.045 0.022 0.016 0.018 0.018

gila Gila 0.018 0.023 0.006 0.018 0.005 0.005 0.039 0.031 0.028 0.028

grca Grand Canyon 0.149 0.137 0.132 0.142 0.157 0.157 0.165 0.133 0.139 0.139

maza Mazatzal 0.060 0.058 0.067 0.060 0.071 0.058 0.071 0.057 0.056 0.056

meve Mesa Verde 0.107 0.094 0.088 0.110 0.091 0.088 0.110 0.090 0.092 0.092

moba Mount Baldy 0.013 0.050 0.003 0.013 0.002 0.012 0.090 0.094 0.067 0.067

pefo Petrified Forest 0.104 0.124 0.142 0.104 0.170 0.129 0.199 0.168 0.174 0.175

98th Percentile D-dv

Class I Area

Class I Area

pefo Petrified Forest 0.104 0.124 0.142 0.104 0.170 0.129 0.199 0.168 0.174 0.175

pimo Pine Mountain 0.039 0.036 0.019 0.039 0.008 0.042 0.049 0.043 0.040 0.040

sagu Saguaro 0.032 0.024 0.037 0.033 0.034 0.033 0.010 0.007 0.007 0.007

sian Sierra Ancha 0.039 0.061 0.001 0.041 0.000 0.061 0.088 0.069 0.066 0.066

supe Superstition 0.041 0.057 0.023 0.040 0.020 0.034 0.081 0.059 0.066 0.066

syca Sycamore Canyon 0.074 0.077 0.039 0.073 0.037 0.063 0.104 0.097 0.089 0.089

Average 0.063 0.066 0.051 0.063 0.052 0.063 0.089 0.074 0.073 0.073

dv_sum/TPY 0.822 0.862 0.662 0.821 0.673 0.823 1.152 0.960 0.943 0.943

dv_max/TPY 0.149 0.137 0.142 0.142 0.170 0.157 0.199 0.168 0.174 0.175

*Uses the formula: dv/thousand TPY = 1000 * (dv change relative to base) / (TPY reduction relative to base)

Table 5(d). Control Option Cost Effectiveness (million $/dv)†

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R Ctrl2_R Ctrl2-r2

CIA Pre-LNB; 

SO2cor 

Pre-LNB 

SCR SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB 

SCR SO2c

Post-LNB 

SNCR 

SO2c

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

care Capitol Reef 28 36 55 34 97 40 29 31 36 36

gali Galiuro 74 147 62 94 64 83 163 183 202 202

gila Gila 165 157 547 207 652 737 90 97 128 128

grca Grand Canyon 20 26 23 26 19 24 21 23 26 26

maza Mazatzal 49 62 45 62 42 65 50 52 65 65

meve Mesa Verde 28 38 35 34 33 43 32 33 39 39

moba Mount Baldy 231 70 1095 291 1304 305 39 32 54 54

pefo Petrified Forest 29 29 21 36 18 29 18 18 21 21

pimo Pine Mountain 76 99 156 95 372 90 72 70 90 90

sagu Saguaro 92 147 82 111 87 115 344 402 533 544

sian Sierra Ancha 76 58 3284 91 N/A 62 40 43 55 55

supe Superstition 73 62 131 92 153 112 44 51 55 55

syca Sycamore Canyon 40 46 78 50 81 60 34 31 41 41

$/dv_sum 3.6 4.1 4.6 4.5 4.4 4.6 3.1 3.1 3.8 3.8

$/dv_max 20.0 25.8 21.3 26.0 17.6 24.1 17.8 17.8 20.7 20.8

Class I Area
†$/dv = $ per year from Table 3 divided by delta dv from Table 1(d) for each control option, in millions
Ctrl2_R ctrl2-r2 Basecorr Rev Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 Ctrl1_R

PoLN SCR 

84%CE, 

SO2c

PoLN SCR 

83%CE, 

SO2c

Pre-LNB; 

SO2cor 

Post-LNB 

SO2cor

Pre-LNB 

SNCR Pre-LNB SCR

Pre-LNB 

SNCR u.4

Pre-LNB SCR 

u.4

Pre-LNB 

SNCR u.3

Pre-LNB SCR 

u.3

Pre-LNB SCR 

SO2c

Post-LNB 

SNCR SO2c

0.69 0.70 0.00 0.00 0.31 0.77 0.06 0.32 0.03 0.22 0.96 0.27

0.31 0.31 0.00 0.00 0.12 0.19 0.05 0.12 0.04 0.11 0.17 0.05

0.48 0.48 0.00 0.00 0.05 0.18 0.01 0.05 0.00 0.01 0.31 0.09

1.16 1.16 0.00 0.00 0.43 1.08 0.14 0.42 0.14 0.37 1.30 0.37

0.76 0.76 0.00 0.00 0.17 0.45 0.07 0.18 0.06 0.14 0.55 0.16

0.63 0.63 0.00 0.00 0.31 0.74 0.09 0.32 0.08 0.21 0.87 0.26

0.70 0.70 0.00 0.00 0.04 0.40 0.00 0.04 0.00 0.03 0.71 0.27

3.19 3.19 0.00 0.00 0.30 0.97 0.15 0.30 0.15 0.30 1.57 0.47

0.54 0.54 0.00 0.00 0.11 0.28 0.02 0.11 0.01 0.10 0.39 0.12

0.25 0.25 0.00 0.00 0.09 0.19 0.04 0.10 0.03 0.08 0.08 0.02

0.85 0.85 0.00 0.00 0.11 0.48 0.00 0.12 0.00 0.14 0.69 0.20

0.76 0.76 0.00 0.00 0.12 0.45 0.02 0.12 0.02 0.08 0.64 0.17

0.74 0.75 0.00 0.00 0.21 0.60 0.04 0.21 0.03 0.15 0.82 0.27

11.06 11.09 2.37 6.77 0.72 2.39 0.59 1.92 9.04 2.71

3.19 3.19 0.43 1.08 0.15 0.42 0.15 0.37 1.57 0.47

10 10 0 5 0 0 0 0 9 0

 Change relative to base (dv)

Number of Class I Areas with visibility improvement ≥ 0.5 dv

5.00

6.00

Cholla: 98th Percentile Visibility Impairment, IMPROVE Method 8

average of all area's (dv/annual TPY)

(sum of dv benefits over all areas) / (annual TPY)

(max dv benefit of any area) / (annual TPY)

($/yr) / (sum of dv benefits over all areas)

($/yr) / (max dv benefit of any area)

Capitol Reef Galiuro Gila Grand 

Canyon Mazatzal Mesa Verde Mount Baldy 

Basecorr Pre-LNB; SO2cor 1.69 0.49 0.79 2.51 1.33 1.53 1.41

CTRL2 Pre-LNB SCR SO2c 0.74 0.32 0.48 1.21 0.77 0.66 0.70

Rev Base Post-LNB SO2cor 1.46 0.45 0.70 2.22 1.19 1.34 1.21

Ctrl1_R Post-LNB SNCR SO2c 1.19 0.40 0.61 1.85 1.03 1.08 0.95

Ctrl2_R PoLN SCR 84%CE, SO2c 0.69 0.31 0.48 1.16 0.76 0.63 0.70

0.00

1.00

2.00

3.00

4.00

5.00

Visibility Impairment (-dv)
Ctrl2_R PoLN SCR 84%CE, SO2c 0.69 0.31 0.48 1.16 0.76 0.63 0.70

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.70 0.31 0.48 1.16 0.76 0.63 0.70
Ctrl2_R ctrl2-r2

PoLN SCR 

84%CE, SO2c

PoLN SCR 

83%CE, SO2c

0.77 0.76

0.14 0.14

0.22 0.22

1.07 1.06

0.43 0.43

0.71 0.70

0.52 0.52

1.34 1.34

0.31 0.31

0.05 0.05

0.51 0.51

0.51 0.51

0.68 0.68

7.23 7.21

1.34 1.34

8 8

ent, IMPROVE Method 8, 20% Best Bkgd. 

1.40

1.60

1.80

Cholla: Visibility Benefit of Controls, 

Mount Baldy Petrified 

Forest

Pine 

Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

4.82 0.92 0.33 1.56 1.43 1.59

3.25 0.54 0.25 0.87 0.79 0.78

4.53 0.85 0.30 1.36 1.27 1.42

4.06 0.73 0.28 1.17 1.10 1.15

3.19 0.54 0.25 0.85 0.76 0.74

Capitol Reef Galiuro Gila Grand 

Canyon

Basecorr Pre-LNB; SO2cor 0.00 0.00 0.00 0.00

CTRL2 Pre-LNB SCR SO2c 0.96 0.17 0.31 1.30

Rev Base Post-LNB SO2cor 0.00 0.00 0.00 0.00

Ctrl1_R Post-LNB SNCR SO2c 0.27 0.05 0.09 0.37

Ctrl2_R PoLN SCR 84%CE, SO2c 0.77 0.14 0.22 1.07

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.76 0.14 0.22 1.06

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

Visibility Benefit, dv
3.19 0.54 0.25 0.85 0.76 0.74

3.19 0.54 0.25 0.85 0.76 0.75

ctrl2-r2 PoLN SCR 83%CE, SO2c 0.76 0.14 0.22 1.06
bility Benefit of Controls, IMPROVE Method 8, 20% Best Bkgd. 

Grand 

Canyon Mazatzal Mesa Verde Mount Baldy Petrified Forest

Pine 

Mountain Saguaro Sierra Ancha Superstition Sycamore Canyon 

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1.30 0.55 0.87 0.71 1.57 0.39 0.08 0.69 0.64 0.82

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0.37 0.16 0.26 0.27 0.47 0.12 0.02 0.20 0.17 0.27

1.07 0.43 0.71 0.52 1.34 0.31 0.05 0.51 0.51 0.68

1.06 0.43 0.70 0.52 1.34 0.31 0.05 0.51 0.51 0.68
1.06 0.43 0.70 0.52 1.34 0.31 0.05 0.51 0.51 0.68
Table 1(d). Visibility Impairment (98th Percentile) at Each Class I Area (CIA) Within APS Cholla's Zone of Influence (300 km) 

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6

care 1.894 1.621 1.369 1.793 1.618 1.814 1.677

gali 1.037 1.033 0.967 1.036 1.035 1.034 1.033

gila 1.210 1.108 1.047 1.177 1.107 1.186 1.131

grca 4.905 4.507 3.338 4.767 4.506 4.798 4.606

maza 1.910 1.689 1.321 1.817 1.688 1.834 1.733

meve 1.499 1.269 1.056 1.428 1.277 1.432 1.309

moba 1.991 1.827 1.335 1.978 1.823 1.981 1.851

pefo 5.759 5.454 4.674 5.647 5.451 5.662 5.495

pimo 1.389 1.217 1.014 1.326 1.217 1.335 1.244

sagu 0.876 0.847 0.673 0.876 0.846 0.876 0.875

sian 2.064 1.905 1.773 2.004 1.905 2.014 1.932

supe 2.045 1.941 1.551 2.017 1.937 2.019 1.997

syca 2.059 1.830 1.342 1.976 1.827 2.000 1.899

Total 28.638 26.248 21.460 27.842 26.237 27.985 26.782

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 0.095 0.067 0.093 0.095 0.092 0.093 0.111

gali 0.001 0.009 0.001 0.001 0.003 0.002 0.018

gila 0.035 0.021 0.030 0.035 0.028 0.034 0.043

grca 0.138 0.200 0.128 0.137 0.123 0.128 0.283

maza 0.077 0.075 0.086 0.076 0.087 0.076 0.075

meve 0.080 0.056 0.066 0.076 0.077 0.081 0.082

moba 0.057 0.084 0.012 0.058 0.011 0.060 0.119

pefo 0.106 0.138 0.104 0.106 0.111 0.113 0.193

pimo 0.060 0.048 0.058 0.059 0.062 0.062 0.055

sagu 0.010 0.026 0.000 0.010 0.000 0.000 0.009

sian 0.055 0.037 0.055 0.055 0.057 0.057 0.106

supe 0.036 0.063 0.026 0.037 0.030 0.021 0.086

syca 0.079 0.091 0.077 0.080 0.068 0.069 0.106

Average 0.064 0.070 0.057 0.063 0.058 0.061 0.099

dv_max/TPY 0.14 0.20 0.13 0.14 0.12 0.13 0.28

dv_sum/TPY 0.83 0.91 0.74 0.82 0.75 0.80 1.28

98th Percentile D-dv

*Uses the formula: dv/thousand TPY ≡

Table 4(d). Control Option Visibility Benefits (dv/thousand TPY)* for Each Class I Area Within APS Cholla's Zone of Influen

2001

CIA

CIA

1000 * (dv change relative to base / TPY reduction relative to bas
Table 5(d). Control Option Cost Effectivenessin million $/dv† for Each Class I Area Within APS Cholla's Zone of Influence (3

Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2

care 31 53 33 39 33 41 32

gali 2141 398 3284 5391 869 2211 202

gila 84 171 100 105 109 112 83

grca 22 18 24 27 24 30 13

maza 39 47 35 49 34 50 47

meve 37 63 46 49 39 47 43

moba 52 42 253 64 261 63 30

pefo 28 26 29 35 27 33 18

pimo 50 74 52 63 48 61 65

sagu 295 137 #N/A 359 #N/A 8842 416

sian 54 96 55 68 52 67 33

supe 82 56 117 100 100 184 41

syca 37 39 40 46 44 55 33

†million $/dv = $ per year in millions from Table 3 divided by dv benefit from Table 1(d) for each control option.

CIA

2001
holla's Zone of Influence (300 km) for 2001-2003 Base Case Emissions and Control Options (listed in Table 2)

Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2

1.483 0.613 1.287 1.033 0.600 0.601 0.273 0.525

0.499 0.361 0.488 0.417 0.361 0.361 0.004 0.070

0.732 0.398 0.654 0.569 0.384 0.385 0.102 0.163

4.260 2.039 3.858 3.259 1.908 1.918 0.398 1.567

1.354 0.767 1.237 1.089 0.742 0.744 0.221 0.589

1.117 0.470 0.970 0.774 0.441 0.443 0.230 0.443

1.654 0.720 1.420 1.114 0.699 0.703 0.164 0.656

4.816 3.301 4.543 4.168 3.226 3.231 0.305 1.085

0.924 0.494 0.823 0.695 0.475 0.477 0.172 0.375

0.376 0.309 0.358 0.336 0.294 0.295 0.029 0.203

1.673 0.840 1.467 1.218 0.808 0.811 0.159 0.291

1.538 0.865 1.365 1.155 0.850 0.852 0.104 0.494

1.594 0.760 1.424 1.181 0.719 0.722 0.229 0.717

22.020 11.937 19.894 17.008 11.507 11.543 2.390 7.178

2002

CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

0.090 0.090 0.090 0.075 0.049 0.071 0.071 0.075

0.025 0.017 0.017 0.000 0.021 0.000 0.000 0.000

0.030 0.035 0.035 0.001 0.006 0.001 0.001 0.001

0.212 0.254 0.254 0.189 0.159 0.181 0.182 0.180

0.052 0.065 0.064 0.062 0.056 0.057 0.063 0.055

0.070 0.069 0.069 0.099 0.097 0.088 0.110 0.091

0.109 0.094 0.094 0.056 0.030 0.082 0.055 0.100

0.133 0.172 0.172 0.138 0.137 0.106 0.138 0.107

0.045 0.045 0.045 0.045 0.042 0.046 0.045 0.044

0.008 0.008 0.008 0.004 0.021 0.000 0.004 0.000

0.088 0.086 0.086 0.063 0.084 0.091 0.063 0.138

0.074 0.067 0.067 0.031 0.068 0.036 0.031 0.037

0.086 0.092 0.092 0.054 0.111 0.002 0.053 0.001

0.079 0.084 0.084 0.063 0.068 0.059 0.063 0.064

0.21 0.25 0.25 0.19 0.16 0.18 0.18 0.18

1.02 1.09 1.09 0.82 0.88 0.76 0.82 0.83

Percentile D-dv

thin APS Cholla's Zone of Influence (300 km) for 2001-2003 

e / TPY reduction relative to base)

2001
 APS Cholla's Zone of Influence (300 km) for 2001-2003 

CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5

33 40 40 40 72 43 52 40

119 218 218 8565 169 #N/A 10781 #N/A

99 103 103 2855 557 3284 3594 2607

14 14 14 16 22 17 20 17

57 56 56 48 64 53 59 54

43 52 53 30 37 35 34 33

28 38 39 54 118 37 67 30

22 21 21 22 26 29 27 28

66 80 80 66 85 66 82 69

383 433 440 779 172 #N/A 980 #N/A

34 42 42 47 42 34 59 22

40 54 54 95 52 84 118 81

35 39 40 55 32 1642 70 2607

 1(d) for each control option.

2002
Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

0.101 0.276 0.080 0.217 0.870 0.254 0.687 0.686

0.001 0.002 0.003 0.004 0.138 0.071 0.127 0.127

0.033 0.103 0.024 0.079 0.334 0.085 0.270 0.269

0.138 0.399 0.107 0.299 2.221 0.599 1.950 1.940

0.093 0.222 0.076 0.177 0.587 0.148 0.495 0.493

0.071 0.222 0.067 0.190 0.647 0.196 0.529 0.527

0.013 0.168 0.010 0.140 0.934 0.306 0.721 0.717

0.112 0.308 0.097 0.264 1.515 0.375 1.317 1.312

0.063 0.172 0.054 0.145 0.430 0.128 0.348 0.346

0.000 0.030 0.000 0.001 0.067 0.022 0.064 0.063

0.060 0.159 0.050 0.132 0.833 0.249 0.659 0.656

0.028 0.108 0.026 0.048 0.673 0.210 0.515 0.513

0.083 0.232 0.059 0.160 0.834 0.243 0.705 0.702

0.796 2.401 0.653 1.856 10.083 2.886 8.387 8.351

2003

Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.074 0.078 0.065 0.065 0.065 0.172 0.120 0.176

0.000 0.020 0.019 0.013 0.013 0.026 0.016 0.030

0.001 0.042 0.035 0.030 0.030 0.079 0.062 0.079

0.180 0.152 0.122 0.132 0.131 0.058 0.061 0.088

0.055 0.072 0.065 0.062 0.062 0.039 0.044 0.077

0.067 0.113 0.093 0.093 0.093 0.127 0.108 0.124

0.068 0.089 0.077 0.070 0.070 0.003 0.050 0.003

0.135 0.171 0.146 0.139 0.138 0.127 0.122 0.114

0.043 0.070 0.059 0.057 0.057 0.020 0.024 0.003

0.000 0.013 0.009 0.010 0.010 0.012 0.008 0.020

0.078 0.090 0.075 0.076 0.076 0.070 0.053 0.048

0.036 0.084 0.065 0.073 0.073 0.049 0.035 0.055

0.040 0.122 0.123 0.091 0.091 0.046 0.037 0.076

0.060 0.086 0.073 0.070 0.070 0.064 0.057 0.069

0.18 0.17 0.15 0.14 0.14 0.17 0.12 0.18

0.78 1.12 0.95 0.91 0.91 0.83 0.74 0.89

 Change relative to base (dv)
Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

51 45 46 55 55 17 30 17

8842 175 156 272 272 114 225 103

4421 84 84 120 120 37 58 38

21 23 25 27 28 52 58 35

69 49 46 59 59 77 80 40

56 31 32 39 39 23 33 25

56 40 39 52 52 1071 71 1095

28 21 21 26 26 23 29 27

88 51 51 63 63 148 148 1095

8842 270 324 370 375 245 422 149

49 39 40 47 48 42 66 63

105 42 46 50 50 61 100 56

95 29 24 40 40 64 95 40

2002
Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr

1.433 1.218 1.046 1.356 1.225 1.368 1.261 1.034

0.904 0.903 0.739 0.904 0.903 0.904 0.903 0.456

1.481 1.478 1.431 1.480 1.478 1.480 1.479 0.833

3.467 2.922 2.220 3.271 2.936 3.310 3.047 2.369

2.078 1.899 1.640 2.016 1.895 2.030 1.950 1.320

2.042 1.757 1.282 1.947 1.721 1.963 1.885 1.551

1.912 1.752 1.675 1.823 1.752 1.825 1.753 1.423

5.140 4.743 4.066 5.025 4.738 5.047 4.825 4.421

1.771 1.642 1.445 1.721 1.640 1.733 1.670 1.172

0.639 0.628 0.477 0.639 0.628 0.639 0.638 0.305

2.356 2.173 1.694 2.258 2.173 2.236 2.175 1.594

2.153 2.063 1.619 2.114 2.062 2.121 2.069 1.461

2.755 2.599 1.882 2.753 2.600 2.754 2.662 1.914

28.131 25.777 21.216 27.307 25.751 27.410 26.317 19.853

All Years

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

0.179 0.153 0.154 0.156 0.114 0.132 0.132 0.106

0.026 0.028 0.027 0.026 0.028 0.025 0.025 0.040

0.080 0.073 0.073 0.039 0.043 0.032 0.032 0.018

0.052 0.096 0.079 0.102 0.083 0.084 0.084 0.149

0.038 0.073 0.045 0.059 0.053 0.050 0.050 0.060

0.126 0.122 0.122 0.140 0.114 0.119 0.119 0.107

0.003 0.002 0.003 0.045 0.057 0.034 0.034 0.013

0.114 0.117 0.169 0.219 0.176 0.187 0.187 0.104

0.020 0.002 0.017 0.024 0.026 0.022 0.022 0.039

0.012 0.020 0.015 0.018 0.015 0.014 0.014 0.032

0.070 0.040 0.060 0.052 0.055 0.054 0.053 0.039

0.048 0.055 0.057 0.043 0.032 0.037 0.037 0.041

0.047 0.077 0.049 0.077 0.068 0.062 0.062 0.074

0.063 0.066 0.067 0.077 0.066 0.065 0.065 0.063

0.18 0.15 0.17 0.22 0.18 0.19 0.19 0.15

0.82 0.86 0.87 1.00 0.86 0.85 0.85 0.82

98th Percentile D-dv
Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

21 20 25 23 26 27 27 28

142 109 138 139 108 144 144 74

46 41 52 90 70 112 113 165

71 31 48 35 36 43 43 20

97 41 83 60 57 73 73 49

29 25 31 25 26 30 31 28

1348 1304 1474 79 52 108 108 231

32 26 22 16 17 19 19 29

189 1304 221 148 117 166 166 76

308 153 260 202 206 250 252 92

53 74 64 68 55 67 68 76

76 54 67 82 94 98 98 73

79 39 78 46 44 58 58 40

2003
CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

0.418 0.893 0.709 0.391 0.393 0.215 0.387 0.077

0.297 0.399 0.345 0.297 0.297 0.001 0.165 0.000

0.501 0.731 0.631 0.500 0.5 0.003 0.050 0.001

1.173 2.104 1.761 1.095 1.101 0.545 1.247 0.196

0.752 1.192 1.008 0.720 0.721 0.179 0.438 0.062

0.662 1.346 1.083 0.631 0.634 0.285 0.760 0.095

0.727 1.243 1.027 0.708 0.709 0.160 0.237 0.089

3.077 4.056 3.645 2.993 2.999 0.397 1.074 0.115

0.624 1.048 0.882 0.608 0.609 0.129 0.326 0.050

0.202 0.264 0.238 0.189 0.19 0.011 0.162 0.000

0.884 1.437 1.225 0.851 0.854 0.183 0.662 0.098

0.801 1.322 1.138 0.765 0.767 0.090 0.534 0.039

0.954 1.648 1.302 0.953 0.953 0.156 0.873 0.002

11.072 17.683 14.994 10.701 10.727 2.354 6.915 0.824

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

0.098 0.055 0.108 0.031 0.094 0.122 0.095 0.100

0.024 0.049 0.039 0.047 0.045 0.022 0.016 0.018

0.023 0.006 0.018 0.005 0.005 0.039 0.031 0.028

0.137 0.132 0.142 0.157 0.157 0.165 0.133 0.139

0.058 0.067 0.060 0.071 0.058 0.071 0.057 0.056

0.094 0.088 0.110 0.091 0.088 0.110 0.090 0.092

0.050 0.003 0.013 0.002 0.012 0.090 0.094 0.067

0.124 0.142 0.104 0.170 0.129 0.199 0.168 0.174

0.036 0.019 0.039 0.008 0.042 0.049 0.043 0.040

0.024 0.037 0.033 0.034 0.033 0.010 0.007 0.007

0.061 0.001 0.041 0.000 0.061 0.088 0.069 0.066

0.057 0.023 0.040 0.020 0.034 0.081 0.059 0.066

0.077 0.039 0.073 0.037 0.063 0.104 0.097 0.089

0.066 0.051 0.063 0.052 0.063 0.089 0.074 0.073

0.14 0.14 0.14 0.42 0.16 0.20 0.17 0.17

0.86 0.66 0.82 0.67 0.82 1.15 0.96 0.94

2002
Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R

36 55 34 97 40 16 4 19

147 62 94 64 83 57 11 62

157 547 207 652 737 35 6 40

26 23 26 19 24 11 3 12

62 45 62 42 65 21 4 23

38 35 34 33 43 18 5 21

70 1095 291 1304 305 20 4 23

29 21 36 18 29 6 2 6

99 156 95 372 90 30 6 33

147 82 111 87 115 83 13 93

58 3284 91 #N/A 62 18 4 20

62 131 92 153 112 20 4 22

46 78 50 81 60 17 4 19

All Years
Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2 Base

0.208 0.065 0.172 0.616 0.184 0.502 0.500 2.761

0.001 0.000 0.001 0.159 0.054 0.102 0.102 0.738

0.003 0.001 0.002 0.332 0.100 0.231 0.231 1.644

0.531 0.157 0.420 1.196 0.343 1.009 1.003 2.375

0.183 0.048 0.128 0.568 0.184 0.472 0.471 1.970

0.321 0.079 0.157 0.889 0.263 0.715 0.712 2.347

0.160 0.087 0.159 0.696 0.216 0.535 0.534 1.921

0.402 0.093 0.315 1.344 0.411 1.063 1.057 5.949

0.131 0.038 0.101 0.548 0.166 0.440 0.439 1.445

0.011 0.000 0.001 0.103 0.026 0.075 0.074 0.483

0.183 0.120 0.181 0.710 0.212 0.586 0.583 1.946

0.091 0.032 0.084 0.660 0.184 0.557 0.555 1.603

0.155 0.001 0.093 0.960 0.346 0.695 0.695 1.586

2.380 0.721 1.814 8.781 2.689 6.982 6.956 26.768

ctrl2_r2

0.100

0.018

0.028

0.139

0.056

0.092

0.067

0.175

0.040

0.007

0.066

0.066

0.089

0.073

0.17

0.94

 Change relative to base (dv)
ctrl2_r2

23

69

45

15

27

26

29

7

38

100

24

25

24
Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 Basecorr CTRL2

2.264 1.821 2.571 2.239 2.628 2.401 2.060 0.836

0.663 0.614 0.706 0.662 0.714 0.674 0.436 0.235

1.415 1.161 1.558 1.411 1.580 1.474 0.850 0.541

2.209 1.897 2.280 2.223 2.291 2.190 1.713 0.914

1.859 1.623 1.887 1.859 1.906 1.864 1.283 0.819

1.981 1.503 2.213 1.981 2.241 2.063 1.895 0.799

1.913 1.528 1.918 1.913 1.919 1.915 1.038 0.685

5.582 4.993 5.826 5.617 5.847 5.555 5.240 3.522

1.387 1.257 1.442 1.388 1.443 1.405 0.677 0.489

0.448 0.417 0.461 0.448 0.466 0.449 0.305 0.167

1.744 1.526 1.894 1.741 1.911 1.807 1.224 0.817

1.462 1.325 1.544 1.462 1.555 1.471 0.982 0.644

1.452 1.294 1.504 1.449 1.519 1.472 1.143 0.537

24.379 20.959 25.804 24.393 26.020 24.740 18.846 11.005

98th Percentile D-dv

Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1 Ctrl-2 Ctrl-3

1.811 1.489 0.799 0.802 0.497 0.940 0.190

0.426 0.348 0.233 0.233 0.075 0.124 0.032

0.758 0.637 0.511 0.513 0.229 0.483 0.086

1.521 1.287 0.879 0.881 0.166 0.478 0.095

1.166 1.017 0.784 0.786 0.111 0.347 0.083

1.660 1.338 0.748 0.752 0.366 0.844 0.134

0.929 0.767 0.671 0.671 0.008 0.393 0.003

4.869 4.372 3.436 3.442 0.367 0.956 0.123

0.655 0.583 0.488 0.488 0.058 0.188 0.003

0.271 0.230 0.160 0.161 0.035 0.066 0.022

1.198 1.044 0.787 0.79 0.202 0.420 0.052

0.927 0.837 0.643 0.643 0.141 0.278 0.059

1.005 0.813 0.527 0.528 0.134 0.292 0.082

17.196 14.762 10.666 10.690 2.389 5.809 0.964

2003

Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R CTRL2_R ctrl2_r2

0.522 0.133 0.360 1.224 0.322 1.012 1.009

0.076 0.024 0.064 0.201 0.078 0.193 0.193

0.233 0.064 0.170 0.309 0.121 0.247 0.245

0.152 0.084 0.185 0.799 0.234 0.642 0.640

0.111 0.064 0.106 0.464 0.149 0.382 0.380

0.366 0.106 0.284 1.096 0.322 0.912 0.908

0.008 0.002 0.006 0.353 0.162 0.258 0.258

0.332 0.102 0.394 1.718 0.497 1.433 1.427

0.057 0.002 0.040 0.188 0.072 0.167 0.167

0.035 0.017 0.034 0.138 0.041 0.111 0.110

0.205 0.035 0.139 0.407 0.154 0.411 0.408

0.141 0.048 0.132 0.338 0.090 0.284 0.284

0.137 0.067 0.114 0.606 0.192 0.478 0.477

2.375 0.748 2.028 7.841 2.434 6.530 6.506

 Change relative to base (dv)

Base Ctrl-1 Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6

2.177 1.872 1.409 2.117 1.862 2.150 1.958

0.881 0.765 0.692 0.828 0.766 0.840 0.775

1.475 1.423 1.297 1.469 1.423 1.471 1.463

3.351 2.922 2.272 3.208 2.936 3.214 2.984

2.069 1.895 1.617 1.996 1.894 2.007 1.933

2.042 1.734 1.307 1.947 1.721 1.963 1.836

1.944 1.907 1.548 1.941 1.907 1.942 1.915

5.557 5.258 4.585 5.403 5.255 5.409 5.256

1.550 1.437 1.268 1.529 1.437 1.543 1.452

0.736 0.643 0.546 0.696 0.639 0.706 0.659

2.175 2.062 1.694 2.174 2.056 2.175 2.032

2.026 1.909 1.578 2.001 1.909 2.009 1.947

2.119 1.905 1.518 2.077 1.905 2.087 1.972

28.102 25.732 21.331 27.386 25.710 27.516 26.182

98th Percentile D-dv

Basecorr CTRL2 Rev Base CTRL1_R CTRL2_R ctrl2_r2 Ctrl-1

1.690 0.735 1.460 1.191 0.694 0.698 0.305

0.486 0.315 0.446 0.400 0.309 0.309 0.116

0.794 0.484 0.701 0.614 0.484 0.484 0.052

2.510 1.211 2.224 1.850 1.159 1.163 0.429

1.326 0.772 1.192 1.031 0.763 0.763 0.174

1.527 0.662 1.338 1.083 0.631 0.634 0.308

1.410 0.700 1.214 0.949 0.698 0.698 0.037

4.816 3.251 4.528 4.055 3.190 3.192 0.299

0.924 0.537 0.845 0.725 0.537 0.537 0.113

0.334 0.253 0.299 0.278 0.247 0.248 0.093

1.562 0.874 1.360 1.165 0.851 0.853 0.113

1.425 0.786 1.266 1.099 0.759 0.761 0.117

1.594 0.776 1.424 1.151 0.742 0.745 0.214

20.398 11.356 18.297 15.591 11.064 11.085 2.370

ercentile D-dv

All Years

Ctrl-2 Ctrl-3 Ctrl-4 Ctrl-5 Ctrl-6 CTRL2 CTRL1_R

0.768 0.060 0.315 0.027 0.219 0.955 0.269

0.189 0.053 0.115 0.041 0.106 0.171 0.046

0.178 0.006 0.052 0.004 0.012 0.310 0.087

1.079 0.143 0.415 0.137 0.367 1.299 0.374

0.452 0.073 0.175 0.062 0.136 0.554 0.161

0.735 0.095 0.321 0.079 0.206 0.865 0.255

0.396 0.003 0.037 0.002 0.029 0.710 0.265

0.972 0.154 0.302 0.148 0.301 1.565 0.473

0.282 0.021 0.113 0.007 0.098 0.387 0.120

0.190 0.040 0.097 0.030 0.077 0.081 0.021

0.481 0.001 0.119 0.000 0.143 0.688 0.195

0.448 0.025 0.117 0.017 0.079 0.639 0.167

0.601 0.042 0.214 0.032 0.147 0.818 0.273

6.771 0.716 2.392 0.586 1.920 9.042 2.706

 Change relative to base (dv)

CTRL2_R ctrl2_r2

0.766 0.762

0.137 0.137

0.217 0.217

1.065 1.061

0.429 0.429

0.707 0.704

0.516 0.516

1.338 1.336

0.308 0.308

0.052 0.051

0.509 0.507

0.507 0.505

0.682 0.679

7.233 7.212
lookup tables

Cholla Control scenarios

scenarios unit 2 unit 3 unit 4

Base SOFA SOFA SOFA

Ctrl-1 SNCR SNCR SNCR

Ctrl-2 SCR SCR SCR

Ctrl-3 SOFA SOFA SNCR

Ctrl-4 LNB + SOFA LNB + SOFA SCR

Ctrl-5 LNB + SOFA SNCR LNB + SOFA

Ctrl-6 LNB + SOFA SCR LNB + SOFA

Basecorr SOFA; SO2corr SOFA; SO2corr SOFA;SO2corr

CTRL2 Pre-LNB, SCR,SO2corr Pre-LNB, SCR,SO2corr Pre-LNB, SCR,SO2corr

Rev Base Post-LNB;SO2corr Post-LNB;SO2corr Post-LNB;SO2corr

CTRL1_R Post-LNB SNCR SO2c Post-LNB SNCR SO2c Post-LNB SNCR SO2c

CTRL2_R Post-LNB SCR@84%CE SO2c Post-LNB SCR SO2c Post-LNB SCR SO2c

ctrl2-r2 PostLNB SCR@83%CE SO2c Post-LNB SCR SO2c Post-LNB SCR SO2c
Class I areas

short abbr Class I area Class I area, medium

Pre-LNB SOFA band Bandelier Bandelier NM

Pre-LNB SNCR brca Bryce Canyon Bryce Canyon NP

Pre-LNB SCR care Capitol Reef Capitol Reef NP

Pre-LNB SNCR u.4 chir Chiricahua NM Chiricahua NM

Pre-LNB SCR u.4 chrw Chiricahua Chiricahua Wild.

Pre-LNB SNCR u.3 gali Galiuro Galiuro Wild.

Pre-LNB SCR u.3 gila Gila Gila Wild.

Pre-LNB; SO2cor grca Grand Canyon Grand Canyon NP

Pre-LNB SCR SO2c jotr Joshua Tree Joshua Tree NP

Post-LNB SO2cor maza Mazatzal Mazatzal Wild.

Post-LNB SNCR SO2c meve Mesa Verde Mesa Verde NP

PoLN SCR 84%CE, SO2c moba Mount Baldy Mount Baldy Wild.

PoLN SCR 83%CE, SO2c pefo Petrified Forest Petrified Forest NP

pimo Pine Mountain Pine Mountain Wild.

sagu Saguaro Saguaro NP

sape San Pedro Parks San Pedro Parks Wild.

sian Sierra Ancha Sierra Ancha Wild.

supe Superstition Superstition Wild.

syca Sycamore Canyon Sycamore Canyon Wild.

zion Zion Zion NP
Class I area, long state

Bandelier NM NM

Bryce Canyon NP UT

Capitol Reef NP UT

Chiricahua NM AZ

Chiricahua Wilderness AZ

Galiuro Wilderness AZ

Gila Wilderness NM

Grand Canyon NP AZ

Joshua Tree NP CA

Mazatzal Wilderness AZ

Mesa Verde NP CO

Mount Baldy Wilderness AZ

Petrified Forest NP AZ

Pine Mountain Wilderness AZ

Saguaro NP AZ

San Pedro Parks Wilderness NM

Sierra Ancha Wilderness AZ

Superstition Wilderness AZ

Sycamore Canyon Wilderness AZ

Zion NP UT