Site & Grid Context

Pass — ERCOT | CenterPoint Energy Houston Electric | PUCT | Matagorda County, TX
Criteria: Resolve four grid-context identifiers (ISO/RTO + load zone, serving utility/TDU, state PUC, county) and confirm mutual consistency. All four must resolve cleanly for a Pass.
Geoforge curated dataset · 2026-07-15
Identifier 1: ISO/RTO + Load Zone
ERCOT — ERCOT Houston Resolved
Nearest: CANEY (3.73 mi)
Identifier 2: Serving Utility (TDU)
CenterPoint Energy Houston Electric Resolved
Market: deregulated
Identifier 3: State PUC
Public Utility Commission of Texas (PUCT) Resolved
State: TX
Identifier 4: County
Matagorda County Resolved
FIPS: 48321 · TX
Cross-Consistency Check
4/4 Identifiers Resolved Consistent
All identifiers mutually consistent

Summary

Nearest Substations (25 mi search radius)

Rank Substation Voltage County Load Zone Distance Role
1 CANEY 138 kV MATAGORDA ERCOT Houston 3.7 mi Nearest
2 Tenaris Substation 138 kV MATAGORDA ERCOT Houston 4.4 mi Supporting
3 VAN VLECK 69 kV MATAGORDA ERCOT Houston 4.6 mi Supporting
4 ALLENHURST — MATAGORDA ERCOT Houston 5.2 mi Supporting
5 Hilcorp Substation 60 kV BRAZORIA ERCOT Houston 7.7 mi Supporting

Analysis

All four grid-context identifiers resolved cleanly for the site: ERCOT Houston load zone (nearest substation: CANEY, 3.7 mi), CenterPoint Energy Houston Electric as TDU, Public Utility Commission of Texas (PUCT), Matagorda County, TX. No cross-identifier contradictions were found.

Nearest viable substation is CANEY (138 kV, 3.7 mi from site centroid). Electric Load Zone attribute resolves to ERCOT Houston, confirming ERCOT market.

Site intersects 3 distinct TDU service territories: CenterPoint Energy Houston Electric, Texas-New Mexico Power Company (TNMP), AEP Texas. HIFLD service territory boundaries overlap significantly in this area. Primary TDU determined as CenterPoint Energy Houston Electric based on most specific (smallest) territory polygon. Market type: deregulated (ERCOT).

State is Texas (TX). Regulatory body: Public Utility Commission of Texas (PUCT).

Site centroid and full polygon fall within Matagorda County, TX (FIPS 48321).

Measurement: WGS 84 / UTM zone 15N (EPSG:32615), utm

Next Steps

  • Confirm TDU service territory assignment with CenterPoint Energy — HIFLD boundaries show multiple overlapping service areas in this region
  • Obtain interconnection study from CenterPoint Energy for the site to confirm available capacity at nearest substations
  • Review ERCOT Houston load zone congestion data and nodal pricing history for cost exposure assessment
  • Verify PUCT regulatory requirements for large load interconnection in the ERCOT Houston zone

Sources