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PacifiCorp Yale Hydroelectric Project

Industrial or other facility, Amboy, Washington. NPDES permit WA0041149, in force until Feb 28, 2029. Last 12 months: no values over a limit, 12 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (6 values), outfall 002 form MM monthly (6 values), outfall OWS form QQ quarterly (1 value), outfall PHS form MM monthly (7 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 12 required values missing, 0 of 40 reports late

Limits in force (21)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all year001
pHdaily minimum≥ 6.5 SU (alert, not enforceable)all year001
pHdaily maximum≤ 8.5 SU (alert, not enforceable)all year001
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all year002
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all year002
pHdaily minimum≥ 6.5 SU (alert, not enforceable)all year002
pHdaily maximum≤ 8.5 SU (alert, not enforceable)all year002
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year002
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year002
Oil & Greasedaily maximumreport only (mg/L) (alert, not enforceable)all yearOWS
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearPHS
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all yearPHS
pHdaily minimum≥ 6.5 SU (alert, not enforceable)all yearPHS
pHdaily maximum≤ 8.5 SU (alert, not enforceable)all yearPHS
Oil & Greasemonthly averagereport only (mg/L)all yearPHS
Oil & grease, non-polar materialmonthly averagereport only (mg/L) (alert, not enforceable)all yearPHS
Flowdaily maximumreport only (MGD) (alert, not enforceable)all yearPHS
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearPHS

Cited limits by parameter: Washington's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0041149 · MCP: https://passage-data.com/mcp