Clean Water Act discharge permit · NPDES IDR10C1P1

CWI RIVER DISTRICT, Boise, ID: NPDES IDR10C1P1 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

CWI RIVER DISTRICT, held by Engineered Structures Inc, holds NPDES permit IDR10C1P1, which discharges to Boise River - Diversion Dam To River Mile 50. EPA’s file records it issued January 10, 2022 and expiring February 9, 2027.

CWI RIVER DISTRICT, Boise, Idaho: Coverage under a general permit IDR10C1P1, held by Engineered Structures Inc; Construction stormwater; Effective; issued January 10, 2022, term to February 9, 2027; discharges to Boise River - Diversion Dam to River Mile 50.

September 10, 2026: Evaluation (S).
August 6, 2026: WW Storm Water Construction - Failure to properly operate and maintain BMPs (ST6).

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 576 were issued before IDR10C1P1. Engineered Structures Inc holds 23 permits in Idaho.

Other permits held by Engineered Structures Inc

MICRON B42, Boise: IDR10C0KA, issued September 29, 2022
SOUTH GARAGE, Boise: IDR10C16O, issued January 10, 2022
OPAL, Boise: IDR10C16Z, issued January 10, 2022
SOUTH LAYDOWN AREA, Boise: IDR10C17M, issued January 10, 2022
NORTH LAYDOWN YARD, Boise: IDR10C1AB, issued January 10, 2022
MICRON ID1 ADMINISTRATIVE BUILDING, Boise: IDR10C1AC, issued January 10, 2022
NORTH GARAGE, Boise: IDR10C1EF, issued January 10, 2022
HOME2SUITES, Twin Falls: IDR10C1QP, issued January 10, 2022
IGC WAPELLO COMPRESSOR BUILDING, Firth: IDR10C1V0, issued January 10, 2022
FRED MEYER STORE 702 & FRED MEYER FUEL KIOSK AND CANOPY, Caldwell: IDR10C1XU, issued January 10, 2022

Coverages issued nearest IDR10C1P1

January 10, 2022: OREGON COMMONS SUBDIVISION, Caldwell, IDR10C1OT, held by Z & H Construction General Contracting, LLC
January 10, 2022: SH-75 ELKHORN RD. TO RIVER ST., KETCHUM, Ketchum, IDR10C1OU, held by Knife River Corporation - Mountain West
January 10, 2022: BLACKFOOT LEGACY SITE DEVELOPMENT, Blackfoot, IDR10C1OW, held by Headwaters Construction
January 10, 2022: 27800 MORROW RESERVOIR RD LHTAC, Glenns Ferry, IDR10C1OX, held by Russ Jensen
January 10, 2022: FINCH ON 27TH, Boise, IDR10C1P0, held by Wright Brothers The Building Company
January 10, 2022: ACE HARDWARE ISLAND PARK, Island Park, IDR10C1P2, held by Headwaters Construction
January 10, 2022: ITD D4 KN 22195 – US-93, CAREY TO HOTSPRINGS, BLAINE CO, Carey, IDR10C1P3, held by Idaho Transportation Department, District 4
January 10, 2022: HARMSEN A DRAIN, Caldwell, IDR10C1P4, held by Joseph Jeffs
January 10, 2022: RIGBY FIELDHOUSE, Rigby, IDR10C1P6, held by Headwaters Construction
January 10, 2022: BRUNDAGE MTN ORIGINS PHASE 1B, Mccall, IDR10C1P9, held by MTN Origins Construction

CWI RIVER DISTRICT among its neighbors

EPA’s permit file holds 132 discharge permits in the Crane Creek-Boise River subwatershed (HUC 170501140403), IDR10C1P1 among them.

Other permits in the Crane Creek-Boise River subwatershed (HUC 170501140403)

11TH ST MTCE & BIKEWAY PROJECT PHASE 2, Boise: IDR10L08C, not classed
11TH STREET MAINTENANCE & BIKEWAY - PHASE 2, Boise: IDR10L08B, not classed
1250 S. DIVISION AVE., Boise: IDR1002V8, minor permit, permit term to February 15, 2022
2018 DOWNTOWN BOISE IMPLEMENTATION, Boise: IDR10017Z, not classed
2018 DOWNTOWN BOISE IMPLEMENTATION, Boise: IDR10019G, not classed
2018 RESIDENTIAL CAPITAL MAINTENANCE, Boise: IDR100138, not classed
2020 DOWNTOWN BOISE IMPLEMENTATION PLAN: 9TH ST, UNIVERSITY DRIVE TO FRONT ST, Boise: IDR10034X, not classed
24TH & MAIN STREET DEMOLITION - BOISE MARINE, Boise: IDR1000NX, not classed
5 CR IMPROVEMENT, Nampa: IDR1001TB, not classed
5TH AND MYRTLE TEMP PARKING LOT, Boise: IDR1000ZX, not classed

Identity

Facility as filed	CWI RIVER DISTRICT
Permittee as filed	Engineered Structures Inc
NPDES ID	IDR10C1P1
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	Boise, ID 83702
Receiving water	Boise River - Diversion Dam to River Mile 50
Receiving water impaired	303(D) Listed
Subwatershed	Crane Creek-Boise River (HUC 170501140403)

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 IDR10C1P1.

Inspections, violations and enforcement

1Single-event violations

Date	What EPA recorded	Agency
August 6, 2026	WW Storm Water Construction - Failure to properly operate and maintain BMPs	ST6

Inspections

Date	What EPA recorded	Agency
September 10, 2026	Evaluation	S

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 IDR10C1P1.

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Nearby on the register

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

Of the 314 storm water construction permits in Boise, 0.0% have a violation on record. The Crane Creek-Boise River subwatershed holds 132 NPDES permits, including CWI RIVER DISTRICT.