Passage Data · Check a report · Use it from your AI

US Army Corps of Engineers

Federal facility (General Government), Fort Peck, Montana. NPDES permit MT0031551 expired Feb 29, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (4 values), outfall 001 form Q quarterly (1 value), outfall 002 form A monthly (5 values), outfall 004 form A monthly (5 values), outfall 005 form A monthly (5 values), outfall 006 form A monthly (5 values), and 8 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 144 reports late

Limits in force (55)

ParameterStatisticLimitMonthsOutfall
Flow ratemonthly averagereport only (MGD)all year001
Flow ratedaily maximumreport only (MGD)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Oil and grease, hexane extr methodquarterly maximumreport only (mg/L)all year001
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year002
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year002
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year002
Flow ratemonthly averagereport only (MGD)all year002
Flow ratedaily maximumreport only (MGD)all year002
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year004
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year004
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year004
Flow ratemonthly averagereport only (MGD)all year004
Flow ratedaily maximumreport only (MGD)all year004
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year005
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year005
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year005
Flow ratemonthly averagereport only (MGD)all year005
Flow ratedaily maximumreport only (MGD)all year005
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year006
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year006
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year006
Flow ratemonthly averagereport only (MGD)all year006
Flow ratedaily maximumreport only (MGD)all year006
Flow rate30-day averagereport only (MGD)all year007
Flow ratedaily maximumreport only (MGD)all year007
pHminimum≥ 6.5 SUall year007
pHmaximum≤ 9 SUall year007
Oil and grease, hexane extr methodquarterly maximum≤ 10 mg/Lall year007
Flow rate30-day averagereport only (MGD)all year010
Flow ratedaily maximumreport only (MGD)all year010
pHminimum≥ 6.5 SUall year010
pHmaximum≤ 9 SUall year010
Oil and grease, hexane extr methodquarterly maximum≤ 10 mg/Lall year010
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year012
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year012
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year012
Flow ratemonthly averagereport only (MGD)all year012
Flow ratedaily maximumreport only (MGD)all year012
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year013
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year013
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year013
Flow ratemonthly averagereport only (MGD)all year013
Flow ratedaily maximumreport only (MGD)all year013
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year014
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year014
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year014
Flow ratemonthly averagereport only (MGD)all year014
Flow ratedaily maximumreport only (MGD)all year014
Temperature, water deg. fahrenheitmonthly minimum≥ 32 deg Fall year021
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year021
Temperature, water deg. fahrenheitmonthly maximum≤ 80 deg Fall year021
Flow ratemonthly averagereport only (MGD)all year021
Flow ratedaily maximumreport only (MGD)all year021

How strict are these limits?

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

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MT0031551 · MCP: https://passage-data.com/mcp