Worksheet Description

IM&E per mgd Presents IM&E reductions per million gallons per day (mgd) of flow 

reduction by loss mode.

Benefits per mgd Presents annual monetized benefits per mgd of flow reduction 

(2011$).

SP survey per mgd Presents annual benefits per mgd of flow reduction based on the 

results of the 316(b) stated preference (SP) survey. Note that 

benefits based on the SP survey are not included in EPA's costbenefit comparison for the final rule and options considered.

Benefits Monetized benefits for the final rule and options considered for new 

units. Does not include benefits associated with changes in 

greenhouse gas emissions based on the social cost of carbon 

(SCC) (2011$, in thousands).

Benefits + SCC Monetized benefits for the final rule and options considered for new 

units including benefits associated with changes in greenhouse gas 

emissions based on SCC (2011$, in millions).

SP benefits Presents national annualized benefits for IM&E reductions under the 

final rule and options considered for new units based on the SP 

Survey (2011$, in millions).

IM&E Reductions Presents national IM&E reductions under the final rule and options 

considered for new units.

New Units Summary Tables for BA.xls

Author: Abt Associates Inc.

Created: 05/02/14

Purpose: To summarize IM&E reductions and estimated benefits for the final rule and options 

considered for new units. Many of the tables are presented in Chapter 12 of the Benefits 

Analysis for the final rule.
Forage Species Commercial and 

Recreational Species All Species

IM 4,340 712 5,052 133

E 4,069 1,922 5,991 175

Commercial and Recreational 

Harvest 

(fish per mgd)

IM&E Loss 

Mode

A1E per mgd

Notes:

IM = impingement mortality; E = entrainment; A1E = age-one equivalent; mgd = millions of gallons per day

a

EPA calculated the reduction in IM&E per mgd of flow reduction nationally by dividing estimated baseline IM&E 

losses at existing facilities by baseline weighted AIF (in mgd). 

Source: U.S. EPA analysis for this report

Annual IM&E Reductions per MGD of Flow Reduction for New Units by Loss Modea
Low Mean High

IM $112 $216 $426 $11 $5 $4

E $173 $304 $551 $41 $3 $562

Annual Benefits per MGD of Flow Reduction for New Units by Loss Mode (2011$)a

Notes:

IM = impingement mortality; E = entrainment

a

 EPA calculated benefits per mgd by dividing the monetized value of baseline IM&E losses at existing facilities by 

baseline weighted AIF (in mgd).

b

 Benefits presented in this table do not include benefits associated with changes in greenhouse gas emissions.

Source: U.S. EPA analysis for this report

IM&E Loss 

Mode

Recreational

Commercial T&E Nonuse
IM&E Loss Mode 5th Percentile Mean 95th Percentile

IM $9,117 $15,042 $20,950

E $15,142 $23,464 $33,214

Notes:

IM = impingement mortality; E = entrainment

a

 EPA calculated benefits per mgd based on the SP survey by dividing the estimated value of baseline 

IM&E losses at existing facilities by baseline weighted AIF (in mgd).

Source: U.S. EPA analysis for this report

Annual Benefits per MGD of Flow Reduction for New Units by Loss Mode based 

on the SP Survey (2011$)a
Low Mean High Low

Option A $4,138.2 $7,370.2 $13,553.0 $893.6 $90.7 $13,077.4 $18,199.9

Option B $1,491.3 $2,656.0 $4,884.1 $322.0 $32.7 $4,712.8 $6,558.8

Option C $219.5 $390.9 $718.9 $47.4 $4.8 $693.7 $965.4

Final Rule-New Units $22.6 $40.2 $74.0 $4.9 $0.5 $71.4 $99.4

Option A $2,722.0 $4,848.0 $8,914.9 $587.8 $59.7 $8,958.6 $12,328.0

Option B $980.9 $1,747.1 $3,212.7 $211.8 $21.5 $3,228.4 $4,442.7

Option C $144.4 $257.1 $472.9 $31.2 $3.2 $475.2 $653.9

Final Rule-New Units $14.9 $26.5 $48.7 $3.2 $0.3 $48.9 $67.3

National Annualized Benefits for IM&E Reductions under the Final Rule and Options Considered for New Units (2011$, 1,000s)

7% Discount Rate

Source: U.S. EPA analysis for this report

Regulatory Option

Recreational

3% Discount Rate

Commercial T&E Nonuse
Mean High

$21,431.9 $27,614.7

$7,723.5 $9,951.6

$1,136.8 $1,464.7

$117.0 $150.8

$14,454.0 $18,520.9

$5,208.9 $6,674.5

$766.7 $982.4

$78.9 $101.1

onsidered for New Units (2011$, 1,000s)

Total Benefits
Low Mean High

Option A $4.1 $7.4 $13.6 $0.9 $0.1 $13.1 -$22.5

Option B $1.5 $2.7 $4.9 $0.3 $0.0 $4.7 -$9.1

Option C $0.2 $0.4 $0.7 $0.0 $0.0 $0.7 -$2.1

Final Rule-New Units $0.0 $0.0 $0.1 $0.0 $0.0 $0.1 -$0.3

Option A $2.7 $4.8 $8.9 $0.6 $0.1 $9.0 -$13.8

Option B $1.0 $1.7 $3.2 $0.2 $0.0 $3.2 -$5.6

Option C $0.1 $0.3 $0.5 $0.0 $0.0 $0.5 -$1.3

Final Rule-New Units $0.0 $0.0 $0.0 $0.0 $0.0 $0.0 -$0.2

3 % Discount Rate

7 % Discount Rate

a

 Social cost of carbon results presented here are based on 3 percent average SCC values.

Source: U.S. EPA analysis for this report

Social Cost 

of Carbon

Regulatory Option a

Recreational

Commercial T&E Nonuse
Low Mean High

-$4.3 -$1.1 $5.1

-$2.5 -$1.3 $0.9

-$1.1 -$0.9 -$0.6

-$0.2 -$0.2 -$0.1

-$1.5 $0.6 $4.7

-$1.1 -$0.4 $1.1

-$0.6 -$0.5 -$0.3

-$0.1 -$0.1 -$0.1

Total Benefits
Regulatory Option 5th Percentile Mean 95th Percentile

Option A $381.8 $596.7 $842.7

Option B $137.6 $215.0 $303.7

Option C $20.3 $31.6 $44.7

Final Rule-New Units $2.1 $3.3 $4.6

Option A $270.7 $423.1 $597.5

Option B $97.6 $152.5 $215.3

Option C $14.4 $22.4 $31.7

Final Rule-New Units $1.5 $2.3 $3.3

3 % Discount Rate

7 % Discount Rate

Source: U.S. EPA analysis for this report

National Annualized Benefits for IM&E Reductions under the Final Rule and 

Options Considered for New Units based on the SP Survey (2011$, millions)
Forage Species Commercial and 

Recreational Species All Species

Option A 303.94 123.86 427.81 12.28

Option B 109.53 44.64 154.17 4.43

Option C 16.12 6.57 22.69 0.65

Final Rule - New 

Units 1.66 0.68 2.34 0.07

Regulatory 

Option

A1E (in millions) Commercial and 

Recreational Harvest 

(millions of fish)

Notes:

A1E = age-one equivalent

a

 The IM&E reductions presented in this table reflect the peak reduction achieved in 2059, the final year of the 

compliance period.

Source: U.S. EPA analysis for this report

National IM&E Reductions under the Final Rule and Options Considered for New Unitsa