Planning Commission backs expanded erosion‑hazard review for Colorado River with carve‑outs for single‑lot homes

The Planning Commission on March 6 recommended an update to the City of Austin Land Development Code (LDC) that would expand the erosion hazard review buffer along the Colorado River from 100 feet to 200 feet downstream of Longhorn Dam, while exempting most single‑lot residential building permits from the larger buffer and asking staff to improve disclosure to property buyers.

The commission’s recommendation follows staff testimony and a public hearing in which watershed staff said the larger buffer responds to the river’s sandy, highly erosive banks and rising erosion damage to homes, roads and utilities. “Those red areas are showing where a bend in the river is getting pretty wiped out during a flood and, you know, carving out 50 or 100 feet of the river in one storm,” Matt Holland, Watershed Protection Department, told commissioners during the staff presentation.

Commissioners and residents pressed staff on how the change would affect individual homeowners, mobile homes and small residential projects. After public testimony both in favor and in opposition, the commission adopted the staff proposal with two amendments: (1) a carve‑out keeping ordinary single‑lot residential building permits (including manufactured housing) subject to the existing 100‑foot erosion hazard review standard rather than the expanded 200‑foot buffer; and (2) a recommendation directing staff to require disclosure to current and prospective property owners that the city…