Laying pipe along Trinity Blvd. for the 900 LF project.
Throughout the system, corrosion was identified to be severe, with wall thickness loss up to 1.5 inches in multiple sections of pipe, primarily at the pipe crown.
During the preliminary design stage, erosion concerns were identified and pipeline channel stabilization recommendations were included.
Constructed in the early 1970’s, the Walker-Calloway Branch Outfall Trunk Sewer System (W-C) is owned and maintained by the Trinity River Authority (TRA). Flows discharge into the 96-inch City of Fort Worth Village Creek outfall where collapses, surcharging, and backups were recurring. This multi-phase program began with a condition and capacity assessment to understand current conditions, the remaining useful life (RUL) of the pipe, risks of failure, and project future capacity needs for the 2040 planning horizon.
The W-C improvement program structured recommended repairs into seven phases. The Preliminary Design Report (PDR) identified that approximately 90% of the system required rehabilitation, with the majority of work recommended to be rehabilitated by trenchless methods.
Daniel Jackson, PE
Trinity River Authority (TRA)
2012 — 2020