Clean Water Act discharge permit · NPDES IDR10C26S

MIDPOINT SUBSTATION EXPANSION, Jerome, ID: NPDES IDR10C26S discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

MIDPOINT SUBSTATION EXPANSION, held by Idaho Power Company, holds NPDES permit IDR10C26S, which discharges to R Canal. EPA’s file records it issued January 10, 2022 and expiring February 9, 2027.

MIDPOINT SUBSTATION EXPANSION, Jerome, Idaho: Coverage under a general permit IDR10C26S, held by Idaho Power Company; Construction stormwater; Effective; issued January 10, 2022, term to February 9, 2027; discharges to R Canal.

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 576 were issued before IDR10C26S. Idaho Power Company holds 48 permits in Idaho.

Other permits held by Idaho Power Company

LANSING SUBSTATION, Middleton: IDR1000L4
FILER SUBSTATION, Filer: IDR1001QK
LINE 440 REBUILD, Picabo: IDR10020Y
UPPER MALAD UNDERGROUND POWERLINE, Hagerman: IDR10027Z
BEACON LIGHT SUBSTATION, Eagle: IDR100280
WARM LAKE UNDERGROUND, Yellow Pine: IDR1002I4
MIDPOINT STAGING YARD, Jerome: IDR1002KF
EMMETT YARD DRAINAGE IMPROVEMENTS, Emmett: IDR1002UP
LINE 172 REBUILD, Jerome: IDR1002WJ, issued January 26, 2021
CALDWELL ROADS, Caldwell: IDR10033N, issued April 26, 2021

Coverages issued nearest IDR10C26S

January 10, 2022: FLATS AT TETON PEAKS PHASE 3, Driggs, IDR10C26N, held by Headwaters Construction
January 10, 2022: BAKER PARK SUBDIVISION NO. 1 (CHALLENGER), Nampa, IDR10C26O, held by Challenger Development, Inc.
January 10, 2022: MEADOWCREST HEIGHTS SUBDIVISION, Boise, IDR10C26P, held by Lennar Homes of Idaho, LLC
January 10, 2022: DRY CREEK RANCH VILLAGE NO. 5, Boise, IDR10C26Q, held by Boise Hunter Homes
January 10, 2022: PINTAIL POND, Parma, IDR10C26R, held by Tyler Archibald
January 10, 2022: TAXI LANE S EXTENSION WIDENING & RECONSTRUCTION (BOI), Boise, IDR10C26T, held by BOISE AIRPORT (City of Boise)
January 10, 2022: NORSE LANDING, Caldwell, IDR10C26U, held by Norse Development LLC
January 10, 2022: RIDLEY COURT, Sandpoint, IDR10C26V, held by Lippert Excavation
January 10, 2022: KENYON MEADOWS PHASE 3, 4 & OFFSITE SEWER UPGRADE, Twin Falls, IDR10C26W, held by Staker Parsons DBA Idaho Materials and Construction
January 10, 2022: SNAKE RIVER CANYON NATIONAL CEMETERY, Buhl, IDR10C26X, held by Alpine Construction Management

MIDPOINT SUBSTATION EXPANSION among its neighbors

EPA’s permit file holds 7 discharge permits in the 170402121002 subwatershed (HUC 170402121002), IDR10C26S among them. Its county holds 32, 2 of them major permits; IDR10C26S is a minor permit.

Other permits in the 170402121002 subwatershed (HUC 170402121002)

LINE 172 REBUILD, Jerome: IDR1002WJ, minor permit, permit term to February 15, 2022
MIDPOINT STAGING YARD, Jerome: IDR1002KF, not classed
MIDPOINT STAGING YARD, Jerome: IDR10L0AZ, not classed
MIDPOINT SUBSTATION, Jerome: IDR10C271, minor permit, discharging to Snake River, permit term to February 9, 2027
SIMPLOT - WENDELL, ID, Wendell: IDR10C1WU, minor permit, discharging to Lateral S-2, permit term to February 9, 2027
SOUTHWEST INTERTIE PROJECT - NORTH - IDAHO SEGMENT, Jerome: IDR10C23D, minor permit, discharging to Rock Creek, permit term to February 9, 2027

What the register holds for MIDPOINT SUBSTATION EXPANSION: its NPDES ID, its permit type and status, its dates, its address in Jerome, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C26S.

Identity

Facility as filed	MIDPOINT SUBSTATION EXPANSION
Permittee as filed	Idaho Power Company
NPDES ID	IDR10C26S
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	January 10, 2022
Expiration date	February 9, 2027
Address	Jerome, ID 83338
Receiving water	R Canal
Subwatershed	170402121002 (HUC 170402121002)

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES IDR10C26S.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C26S.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C26S.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES IDR10C26S.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IDR10C26S.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

0.0% of the 20 storm water construction permits in Jerome County on EPA's NPDES register carry a violation on file. MIDPOINT SUBSTATION EXPANSION, held by Idaho Power Company in Jerome, is in the 170402121002 subwatershed, which lists 7 NPDES permits including this permit, and 0.0% of the 15 Jerome County storm water construction permits including this permit were issued before it.