Clean Water Act discharge permit · NPDES COU000099
CALIFORNIA GULCH-YAK TUNNEL, Leadville, CO: NPDES COU000099 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CALIFORNIA GULCH-YAK TUNNEL, held by California Gulch-Yak Tunnel, holds NPDES permit COU000099. EPA’s file records it issued July 1, 2008 and expiring June 30, 2013. 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.
Identity
| Facility as filed | CALIFORNIA GULCH-YAK TUNNEL |
|---|---|
| Permittee as filed | California Gulch-Yak Tunnel |
| NPDES ID | COU000099 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Associated permit record |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 1, 2008 |
| Expiration date | June 30, 2013 |
| Address | Leadville, CO 80461 |
| Subwatershed | City of Leadville-Arkansas River (HUC 110200010206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 22With a violation of any kind
- 1With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Zinc, total recoverable | 16 | 73 | 1 | December 31, 2017 | 7% over the limit |
| Aluminum, acid soluble | 16 | 74 | 0 | ||
| Solids, total suspended | 16 | 72 | 0 | ||
| Arsenic, total recoverable | 16 | 72 | 0 | ||
| Iron, total recoverable | 16 | 72 | 0 | ||
| Selenium, total recoverable | 16 | 72 | 0 | ||
| Chromium, trivalent [as Cr] | 16 | 72 | 0 | ||
| Silver total recoverable | 16 | 72 | 0 | ||
| Cadmium, total recoverable | 16 | 72 | 0 | ||
| Lead, total recoverable | 16 | 72 | 0 | ||
| Copper, total recoverable | 16 | 72 | 0 | ||
| Manganese, total recoverable | 16 | 72 | 0 | ||
| Mercury, total recoverable | 16 | 72 | 0 | ||
| Oil & Grease | 8 | 65 | 0 | ||
| pH | 8 | 46 | 0 | ||
| Hardness, total [as CaCO3] | 8 | 36 | 0 | ||
| Calcium, total [as Ca] | 8 | 36 | 0 | ||
| Magnesium, total [as Mg] | 8 | 36 | 0 | ||
| Flow | 8 | 36 | 0 | ||
| Oil and grease visual | 4 | 32 | 0 | ||
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 2 | 6 | 0 | ||
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 2 | 6 | 0 |
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 COU000099.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
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, COU000099.
Start the watch
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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 COU000099 there.
Nearby on the register
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- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.