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Clean Water Act discharge permit · NPDES IDR10C15K

SH-75 - MAIN ST KETCHUM, Sun Valley, ID: NPDES IDR10C15K discharge permit, effluent exceedances, inspections, penalties

SH-75 - MAIN ST KETCHUM, held by Staker Parson Companies dba Idaho Materials & Construction, holds NPDES permit IDR10C15K, which discharges to Big Wood River. EPA’s file records it issued January 10, 2022 and expiring February 9, 2027.

SH-75 - MAIN ST KETCHUM, Sun Valley, Idaho: Coverage under a general permit IDR10C15K, held by Staker Parson Companies dba Idaho Materials & Construction; Construction stormwater; Effective; issued January 10, 2022, term to February 9, 2027; discharges to Big Wood River.

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 576 were issued before IDR10C15K. Staker Parson Companies dba Idaho Materials & Construction holds 31 permits in Idaho.

Other permits held by Staker Parson Companies dba Idaho Materials & Construction

Coverages issued nearest IDR10C15K

SH-75 - MAIN ST KETCHUM among its neighbors

EPA’s permit file holds 10 discharge permits in the Trail Creek subwatershed (HUC 170402190304), IDR10C15K among them. Its county holds 42, 2 of them major permits; IDR10C15K is a minor permit.

Other permits in the Trail Creek subwatershed (HUC 170402190304)

What the register holds for SH-75 - MAIN ST KETCHUM: its NPDES ID, its permit type and status, its dates, its address in Sun Valley, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C15K.

Identity

Facility as filedSH-75 - MAIN ST KETCHUM
Permittee as filedStaker Parson Companies dba Idaho Materials & Construction
NPDES IDIDR10C15K
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJanuary 10, 2022
Expiration dateFebruary 9, 2027
AddressSun Valley, ID 83353
Receiving waterBig Wood River
SubwatershedTrail Creek (HUC 170402190304)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES IDR10C15K.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C15K.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C15K.

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 IDR10C15K.

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, IDR10C15K.

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Nearby on the register

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

What this page shows

SH-75 - MAIN ST KETCHUM is among the 32 storm water construction permits on the register in Blaine County, and 0.0% of those permits have a violation on file. Counting this permit, the Trail Creek subwatershed holds 10 NPDES permits. Including this permit, 7.7% of the 26 storm water construction permits in Blaine County were issued before it.