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Tomball officials map how to pay for major water and sewer projects while limiting tax‑rate shock
Summary
City staff told the council a five‑year debt plan tied to utility rates, EDC contributions and the hotel‑occupancy fund should limit a large tax‑rate increase while funding four prioritized water and wastewater projects estimated at about $120 million.
Tomball city staff told the City Council during a May 5 pre‑budget workshop that a coordinated debt program, utility rate adjustments and other revenue strategies should let the city build four major infrastructure projects without a large, single‑year tax‑rate spike.
The workshop presented a financing plan tied to the city’s capital improvement program and five‑year cash flow models. Staff said the four highest‑priority projects are an East water treatment plant, a Baker Drive water plant, an FM 2920 lift‑station consolidation and a south wastewater treatment plant; combined planning estimates discussed during the meeting total roughly $120 million.
City staff framed the financing mix as three parts: (1) issue debt in a rolling program timed with construction needs; (2) have the enterprise (utility) funds contribute a portion of debt service as their revenues grow; and (3) use Economic Development Corporation (EDC/TEDC) payments and other non‑property‑tax sources to reduce the share that would otherwise be covered by the municipal property tax rate. City staff also ran tax‑rate sensitivity models using two different bond interest assumptions (4.5% and 4.9%) and said the interest‑rate assumption could change the projected tax rate by roughly one cent.
Why it matters: If officials did not pursue those mitigation steps and instead shifted all debt service to the property tax rate, staff showed earlier modeling that the tax rate could rise much more sharply. Staff said the package of enterprise contributions and other mitigation measures narrows that increase to only a few cents in most modeled scenarios, though final numbers depend on the certified assessed value roll, the exact interest cost when bonds are issued, and final utility‑rate performance.
Discussion and context: Staff said the south wastewater plant is constrained by regulatory and capacity triggers from state regulators and that, based on plant flows, the city will need to be in design and construction to add capacity before projected exceedances. The presentation noted that failing to expand wastewater capacity could require flow restrictions, development moratoria or other conservation measures.
Staff emphasized timing and the need to avoid issuing debt for projects the city is not yet prepared to spend. The council asked staff to continue refining the financial models, and staff said they will present updated projections as the city receives certified assessed values and final interest assumptions.
Ending: Staff recommended a rolling, coordinated approach that layers utility contributions, TEDC participation and targeted debt issuance to limit property‑tax impact while meeting regulatory and service needs. Councilmembers and staff said they will continue to refine the models before the formal budget hearings this summer.
