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Commissioners weigh hydrants vs. storage tanks as fire-flow rules bite into subdivision designs
Summary
Blanco County commissioners and developers debated NFPA-based fire-flow requirements for subdivisions and whether tanks plus booster pumps can substitute for hydrants; speakers warned hydrant mandates could make some developments infeasible and push builders to many private wells.
A prolonged workshop exchange in Blanco County focused on fire suppression standards for new subdivisions — specifically whether small-lot developments should be required to install fire hydrants that meet NFPA flow thresholds or whether storage tanks and booster pumps are acceptable alternatives.
Commissioner remarks and consultant input centered on a commonly cited NFPA metric (500 gallons per minute at 20 psi for hydrants) and other fire-flow thresholds used for sprinklered dwellings. Speakers asked whether developers could meet that flow using wells, storage tanks (examples discussed: 5,000; 10,000; 25,000; 30,000 gallon tanks), booster pumps and larger distribution mains, or whether such requirements are impractical for three-to-five-acre lot subdivisions.
A developer said that forcing hydrant-level infrastructure on lower-density projects could make central systems cost-prohibitive and incentivize individual wells, which may increase total groundwater extraction. Several speakers proposed alternatives: requiring larger entrance tanks (25,000–30,000 gallons) with operator or monitoring requirements; allowing phase-based approval tied to construction; or using bonds to guarantee system completion and operation.
County staff and consultants noted statutory and NFPA constraints and that some exemptions exist when hydrant-flow is "deemed impractical." Commissioners also discussed operational realities: storage tanks can provide an hour of fire flow per NFPA guidance, but sustained pumping from a well typically cannot match hydrant flows without large storage and pumping capacity. Speakers urged careful drafting so the county does not inadvertently block feasible, water-conserving central systems.
The workshop produced no immediate code change; staff were asked to consider draft language clarifying when hydrants are required, acceptable storage/tank sizes, monitoring or operator requirements, and potential bonding or notice-to-buyers when final TCEQ or fire-flow approvals remain outstanding.
