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Clean Water Act discharge permit · NPDES TXR1571PQ

KEYSTONE 11, Pflugerville, TX: NPDES TXR1571PQ discharge permit, effluent exceedances, inspections, penalties

KEYSTONE 11, held by Austin Canyon Corporation, holds NPDES permit TXR1571PQ, which discharges to Wilbarger Creek. EPA’s file records it issued January 23, 2024 and expiring March 4, 2028.

KEYSTONE 11, Pflugerville, Texas: Coverage under a general permit TXR1571PQ, held by Austin Canyon Corporation; Construction stormwater; Effective; issued January 23, 2024, term to March 4, 2028; discharges to WILBARGER CREEK.

Texas holds 23,986 Construction stormwater coverages of this permit type in EPA’s file; 5,597 were issued before TXR1571PQ. Austin Canyon Corporation holds 2 permits in Texas.

Other permits held by Austin Canyon Corporation

Coverages issued nearest TXR1571PQ

KEYSTONE 11 among its neighbors

EPA’s permit file holds 122 discharge permits in the Upper Wilbarger Creek subwatershed (HUC 120903010103), TXR1571PQ among them. Its county holds 1,099, 15 of them major permits; TXR1571PQ is a minor permit.

Other permits in the Upper Wilbarger Creek subwatershed (HUC 120903010103)

  • 1849 PARK PHASE 2, Pflugerville: TXR1572SG, minor permit, discharging to WILBARGER CREEK, permit term to March 4, 2028
  • AMAZONCOM SERVICES AUS2, Pflugerville: TXR05FC08, minor permit, permit term to August 13, 2026
  • AMAZONCOM SERVICES STX6, Pflugerville: TXR05FX38, minor permit, permit term to August 13, 2026
  • ARS CROSSING PFLUGERVILLE, Pflugerville: TXR1521VX, minor permit, discharging to WILBARGER CREEK, permit term to March 4, 2028
  • ASCO MANOR NEW PARKING AND DRAINAGE IMPROVEMENTS, Manor: TXR15311H, minor permit, discharging to WILBARGER CREEK 1434D, permit term to March 5, 2023
  • AUSTIN DATA CENTER 2, Pflugerville: TXR1558PE, minor permit, discharging to WILBARGER CREEK, permit term to March 4, 2028
  • AUSTIN IRON, Manor: TXR1567MA, minor permit, discharging to WILBARGER CREEK, permit term to March 4, 2028
  • BLACKHAWK, Pflugerville: TXR1529TF, minor permit, discharging to COTTONWOOD CREEK, permit term to March 4, 2028
  • BLACKHAWK TRAIL, Pflugerville: TXR1559YR, minor permit, discharging to BRUSHY CREEK, permit term to March 4, 2028
  • BRIAR CREEK WWTP, Manor: TX0117315, minor permit, discharging to WILBARGER CREEK, COLORADO RIVER ABO, permit term to September 1, 2019

What the register holds for KEYSTONE 11: its NPDES ID, its permit type and status, its dates, its address in Pflugerville, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1571PQ.

Identity

Facility as filedKEYSTONE 11
Permittee as filedAustin Canyon Corporation
NPDES IDTXR1571PQ
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJanuary 23, 2024
Expiration dateMarch 4, 2028
AddressPflugerville, TX 78660
Receiving waterWILBARGER CREEK
SubwatershedUpper Wilbarger Creek (HUC 120903010103)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR1571PQ.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1571PQ.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR1571PQ.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES TXR1571PQ.

Watch this permit

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Nearby on the register

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

What this page shows

KEYSTONE 11, a Storm Water Construction general permit coverage in Pflugerville, Travis County, Texas, is one of 894 such permits in Travis County on EPA's NPDES register, and 0.3% of those permits carry a violation on file. Among those 894 permits, 13.3% were issued earlier than KEYSTONE 11, and the permit sits among 122 NPDES permits in the Upper Wilbarger Creek subwatershed, with no pollutants under a numeric limit or effluent exceedance recorded against it.