AcronymsMW MegawattsNOX Nitrogen OxidesSO2 Sulphur DioxideCD Consent Decree

Unit: SUTHERLAND 1 & 3Location: 3001 East Main St., Marshalltown, IA 50158Capacity: 38 MW (S1); 82 MW (S3)

Years built: 38 MW (1955), 82 MW (1961)Projected NOX Reductions: 599 tons/yearProjected SO2 Reductions: 4,600 tons/year

Refuel Date: Natural gas upon entry of CDRetire/Repower Date: 6/1/2019

Unit: OTTUMWA 1Location: 20775 Power Plant Rd., Ottumwa, IA 52501Capacity: 726 MW

Year built: 1981Projected NOX Reductions: 1,514 tons/yearProjected SO2 Reductions: 10,933 tons/year

Controls/Requirements: - Dry flue gas desulfurization device (DFGD): 30 operating days after 12/31/2015 - Selective Catalytic Reduction (SCR): 30 operating days after 12/31/2019 - Baghouse: 30 operating days after 12/31/2015

Interstate PowerInterstate Power& Light Clean Air& Light Clean AirAct SettlementAct Settlement

LANSING 4

OTTUMWA 1

ML KAPP 2PRAIRIE CREEK 1, 2, 3 & 4

BURLINGTON 1

DUBUQUE 1, 5, & 6

SUTHERLAND 1 & 3

USGS The National Map: National Boundaries Dataset, National Elevation Dataset, Geographic Names InformationSystem, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and NationalTransportation Dataset; U.S. Census Bureau - TIGER/Line; HERE Road Data

NOTE: The Environmental ProtectionAgency does not guarantee the

accuracy, completeness, or timeliness of the information

shown, and shall not be liable for any injury or loss resulting from

reliance upon the information shown.HM 7/15/2015´ 0 200100Miles

IOWA

Unit: LANSING 4Location: 2320 Power Plant Dr., Lansing, IA 52151Capacity: 275 MW

Years built: 15 MW (1948), 12 MW (1949), 38 MW (1957), 275 MW (1977)Projected NOX Reductions: 288 tons/yearProjected SO2 Reductions: 4,795 tons/year

Controls/Requirements: - Dry flue gas desulfurization device (DFGD): 30 operating days after 12/31/2016 - Selective Catalytic Reduction (SCR): 12/31/2015 - Baghouse: 30 operating days after 12/31/2016

Unit: DUBUQUE 1, 5, & 6Location: 920 Kerper Blvd., Dubuque, IA 52004Capacity: 38 MW (D1); 29 MW (D5); 15 MW (D6)

Years built: 15 MW (1929), 28.7 MW (1952), 37.5 MW (1959)Projected NOX Reductions: 461 tons/yearProjected SO2 Reductions: 661 tons/year

Refuel Date: Natural gas upon entry of CDRetire/Repower Date: 6/1/2019

Unit: ML KAPP 2Location: 2001 Beaver Channel Pkwy., Clinton, IA 52732Capacity: 219 MW

Year built: 1967Projected NOX Reductions: 32 tons/yearProjected SO2 Reductions: 3,575 tons/year

Retire/Refuel Date: 6/1/2015

Unit: BURLINGTON 1Location: 4282 Sullivan Slough Rd., Burlington, IA 52601Capacity: 212 MW

Year built: 1968Projected NOX Reductions: 140 tons/yearProjected SO2 Reductions: 4,254 tons/year

Retire/Refuel Date: 12/31/2021

Unit: PRAIRIE CREEK 1 , 2, 3 & 4Location: 3300 C St. Southwest, Cedar Rapids, IA 52404Capacity: 245 mmBTU/hr (PC1); 304 mmBTU/hr (PC2); 50 MW (PC3); 149 NW (PC4)

Years built: 23 MW (1951), 50 MW (1958), 149 MW (1967), 23 MW (1997)Projected NOX Reductions: Units 1 & 2 = 0 tons/year; Units 3 & 4 = 950 tons/yearProjected SO2 Reductions: Units 1 & 2 = 924 tons/year; Units 3 & 4 = 2,797 tons/year

Retire/Refuel Date: Units 1, 2 & 3 on 12/31/2025; Unit 4 on 6/1/2018