Clean Water Act discharge permit · NPDES ALG110568

LAKE PURDY DAM - STABILIZATION IMPROVEMENTS PROJECT, Birmingham, AL: NPDES ALG110568 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
6Pollutants under a numeric limit
0Pollutants with an effluent exceedance

LAKE PURDY DAM - STABILIZATION IMPROVEMENTS PROJECT, held by Thalle Construction Co., Inc,, holds NPDES permit ALG110568. EPA’s file records it issued May 30, 2025 and expiring August 31, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	LAKE PURDY DAM - STABILIZATION IMPROVEMENTS PROJECT
Permittee as filed	Thalle Construction Co., Inc,
NPDES ID	ALG110568
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	May 30, 2025
Expiration date	August 31, 2027
Issuing agency	State
Address	Birmingham, AL 35242
Subwatershed	Little Cahaba River (HUC 031502020103)
NAICS	237990 – Other Heavy and Civil Engineering Construction
SIC	1629 – Heavy Construction

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

6Pollutants on file
6Under a numeric limit
5With a violation of any kind
0With 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
pH	8	14
Solids, total suspended	4	7
Oil & Grease	2	7
Phosphorus, total [as P]	2	7
Flow, in conduit or thru treatment plant	2	7
Rainfall	2	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES ALG110568.

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 ALG110568.

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 ALG110568 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act NPDES permit ALG110568 for the LAKE PURDY DAM - STABILIZATION IMPROVEMENTS PROJECT in Birmingham, AL, held by Thalle Construction Co., Inc, with a Minor discharger class and an Effective permit status. The listed figures are 6 for the discharger class-related count of pollutants under a numeric limit being 0 and pollutants with an effluent exceedance being 0.