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Liberty Hill approves HR Green engineering task order for San Gabriel wastewater interceptor
Summary
The Liberty Hill City Council approved a task order with HR Green to design phases 2 and 3 of the San Gabriel wastewater interceptor, advancing design and early surveying work while council members pressed staff on right-of-entry timelines with property owners.
Liberty Hill city officials on May 13 approved a task order with engineering firm HR Green to carry out design and preconstruction engineering for phases 2 and 3 of the San Gabriel wastewater interceptor project. The council authorized the work after staff presented a 12,650‑foot alignment and a schedule that would run design and permitting through 2026 and construction in 2026–2027.
HR Green senior process engineer Jenny Davila told the council the firm plans to extend “approximately 12,650 linear feet of 24 inches wastewater line” from Highway 29 to an existing wastewater manhole and to run “the topographical survey, the geotechnical work and the design services … in parallel.” The consultant also said the team will use LiDAR and drones to expedite topographical surveys and will coordinate permitting with TCEQ, the river authority and Texas DOT.
City staff and council members stressed that right of entry agreements with private property owners are a critical path item. A city attorney and staff reported that letters had been mailed to 27 property owners and that responses were pending; staff said two owners had not yet replied. City staff warned that lacking signed right of entry agreements would limit how much of the preliminary design could be finalized without site access.
Council members asked HR Green and staff for clearer milestone dates tying property access to the consultant’s schedule. HR Green presented a milestone plan showing 30% design by July 2025 and 100% design by April 2026, with construction expected to begin in April 2026 and finish in July 2027.
Councilmember Michael Helping moved to approve “HR Green task order number 4 in an amount not to exceed $870,000 and 1,992” and Councilmember Wade Ashley seconded the motion. The council approved the task order and directed staff to continue work on property access and permitting coordination.
The approved scope includes survey, design, environmental assessment, permitting coordination and construction‑phase support; HR Green noted it will retain geotechnical consultants and a survey team. The city manager confirmed funding for the engineering phase is budgeted and available.
The project team said they will pursue early coordination with regulatory agencies and use construction sequencing to minimize creek crossings and surface disruption. Council members asked staff to provide a clearer schedule showing when signed right of entry forms must be in place to avoid delays that could add cost.
