Council briefed on 'Dog’s Head' annexation and TIRZ plan for 2,614‑acre mega‑site

City staff and the developer presented a high‑level plan to annex and partner on development of a 2,614‑acre site known as “Dog’s Head,” which sits in Austin’s extraterritorial jurisdiction between the Colorado River, US‑183 and State Highway 130.

Assistant City Manager (Dr.) Johnson described the proposal as a rare economic‑development opportunity that could produce an estimated $1.5 billion to $3.5 billion in new property taxes over 30 years under certain market scenarios. Staff proposed a 45‑year development agreement that would use the city’s existing land‑development code as a baseline, require conveyance of a river trail, set aside at least 266 acres of open space plus an additional trail easement, and obligate the developer to deliver an initial 10% of affordable housing with a second 10% to be achieved through a joint city‑developer financing plan.

The development agreement also contemplates creation of a tax increment reinvestment zone (TIRZ) to fund extensive on‑site infrastructure (roads, water, wastewater and regional drainage solutions) and contemplates collaborating with Travis County on shared financing. Staff emphasized that the TIRZ financing plan, contribution rate and affordable‑housing income bands remain to be determined pending the completion of a market and economic feasibility report due in early June; those details will shape how much tax increment is retained in the district versus flowing to the general fund.

Council members asked detailed questions about environmental protections, floodplain and water‑quality requirements, continued existing uses (including hunting), roadway alignments and impacts to nearby parks and trails, transit and Project Connect implications, and whether municipal facilities could be financed through the TIRZ. City attorneys and the Watershed Protection Department said the development agreement starts from current code and that critical water‑quality and FEMA regulations would still apply; the proposed regulatory plan will be worked out after annexation and must conform to the development agreement.

The developer’s representative said the conceptual roadway and circulation drawings are preliminary and will be revised in response to council and community concerns. Staff said the annexation ordinance, development agreement and TIRZ paperwork are scheduled for council consideration in late May and July respectively, with annexation proposed to become effective June 1 if adopted.

Council did not take a final vote May 19; members requested additional detail on TIRZ scenarios, municipal‑facility financing, affordable‑housing terms and the market analysis before final actions.