Navarro – Houston

The Houston region will encounter reliability problems by 2018 if greater transmission capacity is not added to the existing grid. Lone Star and Cross Texas have proposed the Navarro to Houston project in order to meet the expected future demand. Three options are currently being evaluated. The first is the Navarro to King 500-kV option, estimated at a cost of $674.9m would provide an additional 3,558 MW This would provide a strong alternate link to CREZ and North Zone generation and form the basis of a 500-kV backbone. This option also would require the fewest upgrades to obtain additional incremental transfer and would be able to operate initially at 345-kV. The second option is the Navarro to King 345-kV line, estimated to cost about $512m with an import capability of 3,238 MW. This too would offer a strong alternate route to CREZ and North Zone generation. Including the 50% series compensation would increase the project cost to $552.4m. The Navarro to Gibbons Creek to Zenith 345-kV line is the final option. Estimated to cost $417.1m, the line would have 2,700 MW of incremental import capability and provide a strong link to CREZ and North Zone generation as with the other two options.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Lone Star Transmission 166 500 TX TX 2018
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
498 Suspended Navarro King Substation
Interstate Build Start NERC ISO/RTO Country Project Partners
TRE ERCOT US Cross Texas