A $366 million data center project linked to Anthropic has been filed in Cedar Creek, Texas, with its first building on Earl Callahan Road.

A proposal for a $366 million data center project in Cedar Creek, Texas, has been filed with the Texas Department of Licensing and Regulation.

Dubbed Project Longhorn – Building One, the data center will span about 498,165 sq ft (46,281 sqm) and sit on Earl Callahan Road, near Walter Hoffman Road, in Cedar Creek, Bastrop County. Construction is scheduled to begin on November 30, 2026, with completion targeted for the end of January 2028.

Representatives for Black Chamber, Pacifico Energy, and Anthropic did not respond to BizJournals' requests for comment. The project is part of a 2,842-acre gas-fired electric generation facility intended to support a major data center campus in the Cedar Creek area of Bastrop County, which AI lab Anthropic is reportedly in talks to lease. At full buildout, the facility is expected to offer 710MW of "site-rated redundant power using simple-cycle natural gas turbines," supporting 490MW of IT capacity.

The project is near EdgeConneX's major campus in the area, for which four more data center buildings were filed in August 2026. In total, EdgeConneX's presence in Bastrop County could reach more than a dozen buildings across more than 1,500 acres at full build-out. At least part of the capacity is set to be leased to AI cloud firm CoreWeave. Bastrop County is located outside Austin, Texas.

Texas as a whole has seen a massive influx of data center projects in recent years but has begun to push back. In September, Governor Greg Abbott halted all new data center permits from the state's environmental agency until it completes a large-scale audit of facilities seeking to connect to the Electric Reliability Council of Texas (ERCOT) grid. ERCOT aims to complete the audit by December. Despite this, the new Cedar Creek filing suggests the project is moving ahead.

Pacifico Energy is the energy arm of investment firm Pacifico Group. Based in San Juan, California, the company has interests in both renewable and fossil fuel-based energy projects. Earlier this year, it secured a 7.65GW air permit from the Texas Commission on Environmental Quality (TCEQ) for its planned 5GW GW Ranch project in West Texas.

Black Chamber Partners is part of a private equity firm focused on data center development, typically in Northern Virginia. Founded in 2019, the group develops build-to-suit powered shells for hyperscalers.