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Shelly Materials Inc. dba Columbus Limestone, Inc.

Crushed And Broken Limestone, Columbus, Ohio. NPDES permit OH0006475, in force until Oct 31, 2029. Last 12 months: over a limit 3 times (last August 2026), 15 of 55 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 002 form A monthly (6 values), outfall 003 form A monthly (6 values), outfall 004 form A monthly (6 values), outfall 005 form A monthly (6 values), outfall 006 form A monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 60 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
August 2026002Solids, total suspended, monthly average39≤ 30 mg/L30%
August 2026006Solids, total suspended, daily maximum117≤ 45 mg/L160%
August 2026006Solids, total suspended, monthly average117≤ 30 mg/L290%

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall 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
pHdaily minimum≥ 6.5 SUall year003
pHdaily maximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Solids, total suspendeddaily maximum≤ 45 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHdaily minimum≥ 6.5 SUall year004
pHdaily maximum≤ 9 SUall year004
Solids, total suspendedmonthly average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 45 mg/Lall 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
pHdaily minimum≥ 6.5 SUall year005
pHdaily maximum≤ 9 SUall year005
Solids, total suspendedmonthly average≤ 30 mg/Lall year005
Solids, total suspendeddaily maximum≤ 45 mg/Lall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
pHdaily minimum≥ 6.5 SUall year006
pHdaily maximum≤ 9 SUall year006
Solids, total suspendedmonthly average≤ 30 mg/Lall year006
Solids, total suspendeddaily maximum≤ 45 mg/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006

How strict are these limits?

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

Same industry: the 131 Mining and Quarrying of Nonmetallic Minerals permits in Ohio.

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Your permit document is the final word. As JSON: /api/v1/permits/OH0006475 · MCP: https://passage-data.com/mcp