Clean Water Act discharge permit · NPDES ILG840052

CASPER STOLLE QUARRY, Dupo, IL: NPDES ILG840052 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
4Pollutants under a numeric limit
1Pollutants with an effluent exceedance

CASPER STOLLE QUARRY, held by CASPER STOLLE QUARRY AND CONTRACTING, holds NPDES permit ILG840052, which discharges to Old Prairie Dupont Ck;Miss R So Cen. EPA’s file records it issued March 23, 2012 and expiring February 28, 2017. 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	CASPER STOLLE QUARRY
Permittee as filed	CASPER STOLLE QUARRY AND CONTRACTING
NPDES ID	ILG840052
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	March 23, 2012
Expiration date	February 28, 2017
Address	Dupo, IL 62239
Receiving water	OLD PRAIRIE DUPONT CK;MISS R SO CEN
Subwatershed	Middle Prairie du Pont Creek (HUC 071401010503)
Other EPA IDs (FRS)	ICIS-AIR source IL000163802AAB

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

4Pollutants on file
4Under a numeric limit
4With 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
Solids, total suspended	2	72	2	December 31, 2002	54% over the limit
pH	2	86	0
Flow, in conduit or thru treatment plant	1	49	0
Offensive Conditions	1	19	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 ILG840052.

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.

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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 ILG840052 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES ILG840052 for CASPER STOLLE QUARRY in Dupo, IL, held by CASPER STOLLE QUARRY AND CONTRACTING, which discharges to OLD PRAIRIE DUPONT CK;MISS R SO CEN and sits in subwatershed HUC 071401010503. The page lists the permit as Administratively continued, with a Minor Discharger class of 4, 1 pollutant under a numeric limit, and 1 pollutant with an effluent exceedance. EPA's file shows the permit issued March 23, 2012 and expiring February 28, 2017.