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Clean Water Act discharge permit · NPDES TXR1570WC

SIENNA LAKES UNIT 2, San Antonio, TX: NPDES TXR1570WC discharge permit, effluent exceedances, inspections, penalties

SIENNA LAKES UNIT 2, held by Yc Partners, LLC, holds NPDES permit TXR1570WC, which discharges to Chupaderas Creek. EPA’s file records it issued October 13, 2025 and expiring March 4, 2028.

SIENNA LAKES UNIT 2, San Antonio, Texas: Coverage under a general permit TXR1570WC, held by Yc Partners, LLC; Construction stormwater; Effective; issued October 13, 2025, term to March 4, 2028; discharges to CHUPADERAS CREEK.

Texas holds 23,986 Construction stormwater coverages of this permit type in EPA’s file; 16,361 were issued before TXR1570WC. Yc Partners, LLC holds 77 permits in Texas.

Other permits held by Yc Partners, LLC

Coverages issued nearest TXR1570WC

SIENNA LAKES UNIT 2 among its neighbors

EPA’s permit file holds 118 discharge permits in the Upper Calaveras Creek subwatershed (HUC 121003010302), TXR1570WC among them. Its county holds 2,157, 12 of them major permits; TXR1570WC is a minor permit.

Other permits in the Upper Calaveras Creek subwatershed (HUC 121003010302)

  • 87 PIT, San Antonio: TXR05FN77, minor permit, permit term to August 13, 2026
  • 9362 HILDEBRANDT, San Antonio: TXR1568QP, minor permit, discharging to CALAVERAS RESERVOIR, permit term to March 4, 2028
  • ALAMO CITY ESS, San Antonio: TXR1596XM, minor permit, discharging to HONDO CREEK, permit term to March 4, 2028
  • ALAMO CITY SUBSTATION ESS, San Antonio: TXR1578WS, minor permit, discharging to SALADO CREEK, permit term to March 4, 2028
  • ANNABELLE RANCH, San Antonio: TXR1564MD, minor permit, discharging to HONDO CREEK, permit term to March 4, 2028
  • BLUE RIDGE - HOME BUILDING, San Antonio: TXR1579UI, minor permit, discharging to CALAVERAS RESERVIOR, permit term to March 4, 2028
  • BLUE RIDGE RANCH, San Antonio: TXR1508VL, minor permit, discharging to UNNAMED TRIBUTARY TO CALAVERAS CREEK TO CALAVERAS, permit term to March 4, 2028
  • BLUE RIDGE RANCH SUBD UNIT 7, San Antonio: TXR1553UF, minor permit, discharging to ROSILLO CREEK 1910B, permit term to March 4, 2028
  • BLUERIDGE RANCH, San Antonio: TXR1590SC, minor permit, discharging to ROSILLO CREEK, permit term to March 4, 2028
  • C&F TOOL & DIE, San Antonio: TXRNEBV90, minor permit, permit term to August 13, 2026

What the register holds for SIENNA LAKES UNIT 2: its NPDES ID, its permit type and status, its dates, its address in San Antonio, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1570WC.

Identity

Facility as filedSIENNA LAKES UNIT 2
Permittee as filedYc Partners, LLC
NPDES IDTXR1570WC
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedOctober 13, 2025
Expiration dateMarch 4, 2028
AddressSan Antonio, TX 78623
Receiving waterCHUPADERAS CREEK
SubwatershedUpper Calaveras Creek (HUC 121003010302)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR1570WC.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1570WC.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR1570WC.

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 TXR1570WC.

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

SIENNA LAKES UNIT 2 is one of 1,788 storm water construction permits on EPA's NPDES register in Bexar County. It is also one of 118 NPDES permits in the Upper Calaveras Creek subwatershed, and 63.6% of the 1,787 storm water construction permits in Bexar County have an earlier issue date than this permit.