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Martin Marietta Materials, LLC - Fort Calhoun Quarry East

Crushed And Broken Limestone, Fort Calhoun, Nebraska. NPDES permit NE0000663 expired Jun 30, 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 002 form M quarterly (2 values), outfall 002 form Q quarterly (6 values), outfall 004 form M quarterly (2 values), outfall 004 form Q quarterly (6 values), outfall 002 form P every 60 months, outfall 004 form P every 60 months
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 32 reports late

Limits in force (18)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 25 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year002
Hydrocarbons, total gas chromatographdaily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Priority pollutants scan [yes/no]valuereport only (N=0;Y=1)all year002
pHminimum≥ 6.5 SUall year004
pHmaximum≤ 9 SUall year004
Solids, total suspendedmonthly average≤ 25 mg/Lall year004
Solids, total suspendeddaily maximum≤ 45 mg/Lall year004
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year004
Hydrocarbons, total gas chromatographdaily maximumreport only (mg/L)all year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Priority pollutants scan [yes/no]valuereport only (N=0;Y=1)all year004

How strict are these limits?

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

Same industry: the 11 Mining and Quarrying of Nonmetallic Minerals permits in Nebraska.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NE0000663 · MCP: https://passage-data.com/mcp