Site & Grid Context

Pass — 3/4 identifiers resolved - ERCOT (ERCO) - LZ_HOUSTON, TDU ambiguous (verification required), TX PUC, Matagorda
Criteria: Resolve site grid identifiers — ISO/RTO & load zone, serving utility (TDU), state PUC, and county. Threshold: ≥1 identifier resolved = Pass.
Geoforge curated dataset · 2026-08-17
ISO/RTO & LOAD ZONE
ERCOT (ERCO) Resolved
Load Zone: LZ_HOUSTON
SERVING UTILITY / TDU
TDU Ambiguous Verification Required
5 overlapping utilities
STATE PUC
Public Utility Commission of Texas Resolved
Texas
COUNTY
Matagorda Resolved
FIPS: 48321
RESOLVING SUBSTATION
CANEY
138 kV · 3.7 mi · MATAGORDA
AREA GENERATION CAPACITY
6,094 MW
26 generating units within 25 mi

Summary

Substation Universe (A → B → C)

Count A (raw radius, all voltages/statuses): 86 → Count B (≥69 kV, in-service/UC): 81 → Count C (curated): 72

Curated Substations (Set C, top 15 by proximity)

# NAME kV DIST (MI) COUNTY ROLE
1 CANEY 138 3.7 MATAGORDA Resolving
2 Tenaris Substation 138 4.4 MATAGORDA Supporting
3 VAN VLECK 69 4.6 MATAGORDA Supporting
4 Bay City 138 7.8 MATAGORDA Supporting
5 Magill Substation 138 8.2 MATAGORDA Supporting
6 Peyton Creek Wind GSU 345 8.6 MATAGORDA Supporting
7 OLD OCEAN 2 138 8.7 BRAZORIA Supporting
8 LINNVILLE 138 8.8 BRAZORIA Supporting
9 Phillips No 5 138 8.9 BRAZORIA Supporting
10 Phillips No 2 138 8.9 BRAZORIA Supporting
11 P66 SUBSTATION #2 69 8.9 BRAZORIA Supporting
12 OLD OCEAN 138 8.9 BRAZORIA Supporting
13 SUBSTATION #6 69 8.9 BRAZORIA Supporting
14 Old Ocean 138 9.0 BRAZORIA Supporting
15 FM 524 Substation 138 9.0 BRAZORIA Supporting

Overlapping Service Territories

UTILITY TYPE OVERLAP CONTROL AREA
AEP TEXAS CENTRAL COMPANY INVESTOR OWNED 100% NOT AVAILABLE
JACKSON ELECTRIC COOP, INC - (TX) COOPERATIVE 100% ERCO
WHARTON COUNTY ELEC COOP, INC COOPERATIVE 100% ERCO
TEXAS-NEW MEXICO POWER CO INVESTOR OWNED 100% NOT AVAILABLE
CENTERPOINT ENERGY INVESTOR OWNED 100% NOT AVAILABLE

Canonical Identifiers

IDENTIFIERVALUE
Balancing AuthorityERCO
ISO/RTOERCOT
Load ZoneLZ_HOUSTON
Wires Utility (TDU)AEP TEXAS CENTRAL COMPANY, JACKSON ELECTRIC COOP, INC - (TX), WHARTON COUNTY ELEC COOP, INC, TEXAS-NEW MEXICO POWER CO, CENTERPOINT ENERGY
Transmission OwnerNot resolved
State PUCPublic Utility Commission of Texas
CountyMatagorda
County FIPS48321
StateTexas

Generation Capacity by Fuel — Area generators (6,094 MW, 26 units)

Analysis

Site falls within the ERCOT (ERCO) balancing authority, load zone LZ_HOUSTON, TDU is ambiguous among 5 utilities (verification required), in Matagorda County, Texas. 3 of 4 identifiers resolved with no cross-consistency contradictions. CANEY (138 kV, 3.7 mi) is the nearest curated substation.

The substation universe construction identified 86 substations within the 25-mile search radius. After filtering to ≥69 kV in-service or under-construction units (81), structural curation removed switchyards, taps, and pseudo-bus entries, yielding 72 curated substations (Set C).

3 of 4 grid identifiers resolved cleanly. The site is in ERCOT (ERCO) territory, load zone LZ_HOUSTON. The serving utility is ambiguous among 5 overlapping service territory polygons (known HIFLD artifact for this region) and requires TDU verification. Matagorda County (FIPS 48321) and the Public Utility Commission of Texas resolved cleanly from the US County Boundaries core layer.

Next Steps

  • Verify serving TDU (wires utility) through direct utility inquiry — 5 overlapping service territories identified
  • Confirm ERCOT load zone assignment (LZ_HOUSTON) via ERCOT mapping portal
  • Request interconnection study from resolved TDU to establish hosting capacity at CANEY 138 kV

Measurement: WGS 84 / UTM zone 15N (EPSG:32615), utm | Transformation Applied: → (0.0 m)

Sources