Sierra Madre Solar
255.15 MW generation in Zapata, TX · In queue since January 2020 · Proposed COD December 2027
255.15 MW
Capacity
1
Components
Solar
6y 6m
In Queue
Facility Study
IA Phase
COD target: 2027
Total Duration
7y 11m
Interconnection request submitted to ISO/RTO
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2027-12-01
Zapata County school board approved Chapter 313 property tax abatement for Sierra Madre Solar Holdings LLC
sourceSierra Madre Solar is a proposed 255.15 MW solar generation project located in Zapata County, Texas. Developed by Sierra Madre Solar LLC, the project entered the ERCOT interconnection queue as ERCOT-23INR0006 on January 22, 2020. The proposed commercial operation date is December 1, 2027, and the project's interconnection status is currently in the Facility Study phase. The point of interconnection is on the tap 345kV 80307 Del Sol - 80225 Cenizo line.
The Sierra Madre Solar project has been the subject of recent news coverage, with 12 articles categorized as regulatory, industry, deals, and grid-related.
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
TX
County
Zapata
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Sierra Madre Solar LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
tap 345kV 80307 Del Sol - 80225 Cenizo
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- ERCOT
- Trading Hub
- HB_WEST
- Hub Confidence
- MEDIUM
- POI Substation
- Mesa del Sol Substation
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
No Ask reports yet for this entity.
Ask about Sierra Madre SolarForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
