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Friendswood consultants present master drainage plan, outline 15 prioritized projects to reduce local flood risk
Summary
Consultants presented an updated master drainage plan that identifies priority projects, new flood-risk data and a centralized GIS; staff and council discussed workshops, costs, partnerships and grant eligibility to move projects from study to construction.
Consultants from Half Associates told Friendswood City Council that the city needs a comprehensive update to its master drainage plan and presented prioritized recommendations, new flood-risk analysis and a centralized GIS to guide future projects.
"There's a tremendous need for a comprehensive master drainage plan," Jason Becker told the council, outlining deliverables that include prioritized recommendations, a flood-risk database and an implementation roadmap intended to help the city pursue funding and construction.
Kyle Alton, the study's lead modeller, described the team's risk-assessment method: a hex-grid analysis combining historical flooded structures, roadway inundation and inundated area to locate problem areas. He said the team screened roughly 53 initial project concepts and narrowed the list to about 15–20 projects judged most feasible for implementation, then advanced the top candidates to cost-estimating and prioritization.
The consultants emphasized a mixed portfolio of solutions — storm sewer upgrades, pond construction, channel and roadside-ditch work and targeted neighborhood improvements — with costs ranging from lower-cost local fixes to larger regional conveyance work. Kyle said the analysis uses recent county bid tabs, standard contingencies and allowances for right-of-way and mitigation when estimating probable construction costs.
Council members pressed for a technical workshop to review project-level benefit–cost detail and funding assumptions. Jason and Kyle said staff and the consultant team can provide deep‑dive sessions and link detailed backup materials to a flood-risk story map under development so councilors can examine the modeling and assumptions behind each prioritized project.
The presentation noted that the plan accounts for water entering the city from outside the Friendswood boundary and that some large projects will likely require partnership with regional entities. Consultants and staff recommended packaging candidate projects and preparing grant-ready documentation to improve competitiveness for state or federal funds.
Next steps outlined by staff: provide council access to the story map and backup files, schedule optional workshops for detailed review, and consider prioritizing projects for potential inclusion in capital planning or a future bond package.
