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Clean Water Act discharge permit · NPDES IDR10C16Z

OPAL, Boise, ID: NPDES IDR10C16Z discharge permit, effluent exceedances, inspections, penalties

OPAL, held by Engineered Structures Inc, holds NPDES permit IDR10C16Z. EPA’s file records it issued January 10, 2022 and expiring February 9, 2027.

OPAL, Boise, Idaho: Coverage under a general permit IDR10C16Z, held by Engineered Structures Inc; Effective; issued January 10, 2022, term to February 9, 2027.

Other permits held by Engineered Structures Inc

OPAL among its neighbors

EPA’s permit file holds 184 discharge permits in the Fivemile Creek subwatershed (HUC 170501140202), IDR10C16Z among them.

Other permits in the Fivemile Creek subwatershed (HUC 170501140202)

What the register holds for OPAL: its NPDES ID, its permit type and status, its dates, its address in Boise, Idaho. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C16Z.

Identity

Facility as filedOPAL
Permittee as filedEngineered Structures Inc
NPDES IDIDR10C16Z
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJanuary 10, 2022
Expiration dateFebruary 9, 2027
AddressBoise, ID 83716
SubwatershedFivemile Creek (HUC 170501140202)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES IDR10C16Z.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C16Z.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C16Z.

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 IDR10C16Z.

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, IDR10C16Z.

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  • One permit holder — $99/month
  • One watershed — $2,990/year
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Nearby on the register

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

What this page shows

0.0% of the 16 general permit coverages in Boise have a violation on file, and OPAL is among them. The Fivemile Creek subwatershed holds 184 NPDES permits, this permit included.