Clean Water Act discharge permit · NPDES IDR10C1FM

SH-55, FARMWAY RD. TO MIDDLETON RD., Nampa, ID: NPDES IDR10C1FM 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

SH-55, FARMWAY RD. TO MIDDLETON RD., held by Knife River Corporation - Mountain West, holds NPDES permit IDR10C1FM, which discharges to Lake Lowell. EPA’s file records it issued January 10, 2022 and expiring February 9, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for SH-55, FARMWAY RD. TO MIDDLETON RD.: its NPDES ID, its permit type and status, its dates, its address in Nampa, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C1FM.

Identity

Facility as filed	SH-55, FARMWAY RD. TO MIDDLETON RD.
Permittee as filed	Knife River Corporation - Mountain West
NPDES ID	IDR10C1FM
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	Nampa, ID 83687
Receiving water	Lake Lowell
Subwatershed	Lower Indian Creek (HUC 170501140507)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

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 IDR10C1FM.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C1FM.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C1FM.

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 IDR10C1FM.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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, IDR10C1FM.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IDR10C1FM there.

SH-55, FARMWAY RD. TO MIDDLETON RD., Nampa, Idaho: Coverage under a general permit IDR10C1FM, held by Knife River Corporation - Mountain West; Construction stormwater; Effective; issued January 10, 2022, term to February 9, 2027; discharges to Lake Lowell.

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 576 were issued before IDR10C1FM. Knife River Corporation - Mountain West holds 56 permits in Idaho.

Other permits held by Knife River Corporation - Mountain West

CASCADE PIT, Cascade: IDR05J01R, issued June 22, 2021
US-30, E 4000 NORTH ROAD, Filer: IDR10016Q
SH-51, MOUNTAIN HOME SOUTH RESTORATION, Mountain Home: IDR10017K
GREENHURST RD. AND ELIJAH DRAIN CULVERT REPAIR, Nampa: IDR10017L
LANCASTER TERRACES/N. MOUNTAIN PIPING UPGRADES, Boise: IDR1001A0
BLACKS CREEK HILLSIDE DEVELOPMENT PROJECT, Boise: IDR1001B7
ENCORE SUBDIVISION, Boise: IDR1001D6
ADA COUNTY GLENWOOD EMS PARKING LOT RECONSTRUCTION AND DRAINAGE, Garden City: IDR1001E2
QUAIL HOLLOW GOLF COURSE PATH DEVELOPMENT, Boise: IDR1001F5
SEWER LINE REPLACEMENT AT GREGORY LIFT STATION, Meridian: IDR1001KK

Coverages issued nearest IDR10C1FM

January 10, 2022: SKYBREAK SUBDIVISION NO. 3, Meridian, IDR10C1FH, held by F111, LLC
January 10, 2022: SKYBREAK SUBDIVISION NO. 3, Meridian, IDR10C1FI, held by Conger Management Group
January 10, 2022: COFFEY TOWNHOMES SUBDIVISION (GRANITE), Garden City, IDR10C1FJ, held by Granite Excavation, Inc.
January 10, 2022: GUCHES SUBDIVISION NO. 3, Caldwell, IDR10C1FK, held by Conger Group
January 10, 2022: MILESTONE RANCH SUB., Star, IDR10C1FL, held by Toll Bros, Inc.
January 10, 2022: GROSSMAN RETREAT (OWNER)(REV1), Coeur D Alene, IDR10C1FN, held by Kevin Grossman
January 10, 2022: ASHER APARTMENTS, Nampa, IDR10C1FO, held by Enclave Companies
January 10, 2022: GROSSMAN RETREAT - VERDIS(REV1), Coeur D Alene, IDR10C1FQ, held by Verdis
January 10, 2022: ITD D3 22715 SH55 FARMWAY RD TO MIDDLETON RD, Nampa, IDR10C1FR, held by Idaho Transportation Dept D3
January 10, 2022: PANHANDLE BIKE RANCH, Sagle, IDR10C1FT, held by Panhandle Gravity Sports LLC

SH-55, FARMWAY RD. TO MIDDLETON RD. among its neighbors

EPA’s permit file holds 358 discharge permits in the Lower Indian Creek subwatershed (HUC 170501140507), IDR10C1FM among them.

Other permits in the Lower Indian Creek subwatershed (HUC 170501140507)

11TH AVE S 2-WAY CONVERSION CITY OF NAMPA, Nampa: IDR10L0LN, not classed
11TH AVE S TWO-WAY CONVERSION, Nampa: IDR10L0LO, not classed
12TH-15TH 2ND-7TH ST. SOUTH WATERLINES REPLACEMENT, Nampa: IDR10C27N, minor permit, discharging to Indian creek, permit term to February 9, 2027
1908 SUNNY RIDGE, Nampa: IDR1001JD, not classed
1ST ST. & ROOSEVELT AVE. WATERLINE, Nampa: IDR1000GJ, not classed
2025 ARTERIAL & COLLECTOR CAPITAL MAINTENANCE, Kuna: IDR10C1UW, minor permit, discharging to State Lateral, permit term to February 9, 2027
203 AND 212 1ST AVE., Nampa: IDR10L0J9, not classed
21ST AVENUE MARRIOTT, Caldwell: IDR10C1IN, minor permit, discharging to Wilson Drain, permit term to February 9, 2027
24229 MIDDLETON RD, SH 55 TO FLAMINGO AVE, Nampa: IDR10L0LR, not classed
6TH STREET MULTI-PLEXES, Nampa: IDR1001D8, not classed

Nearby on the register

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

Among the 208 storm water construction permits in Nampa, 0.0% carry a violation on file. SH-55, FARMWAY RD. TO MIDDLETON RD. is counted among 358 NPDES permits in the Lower Indian Creek subwatershed, including this permit. Of the 84 storm water construction permits in Nampa, counting this permit, 63.1% were issued earlier.