Developers brief commission on 600 East Riverside PUD concept; commissioners ask for more detail on waterfront impacts

A development assessment briefing on Aug. 6 introduced preliminary plans for a proposed planned unit development (PUD) at 600 East Riverside Drive, a roughly 1.75‑acre, mixed‑use redevelopment site along the Lake/Blunn Creek confluence on Austin’s South Central waterfront.

The applicant described a constrained, mostly paved site today and said the project would pull buildings and impervious cover away from the creek and lake edge, install contemporary water‑quality treatment, replant riparian vegetation and provide mixed commercial/residential uses with parking in the building footprint. The applicant is pursuing a PUD to allow height, density and several code modifications because the current site and waterfront overlay limit standard redevelopment options.

Why it matters: the property sits directly adjacent to Lady Bird Lake/Blunn Creek and the South Central Waterfront planning area. Commissioners and public commenters emphasized that the waterfront overlay, neighborhood plans and the broader South Central Waterfront vision should guide any concessions; several speakers warned against “spot zoning” by approving multiple small PUDs that cumulatively change the overlay’s intent.

Key points from the briefing - Site and proposal: roughly 1.75 acres at 606½ E. Riverside Drive; existing development is a restaurant and surface parking. The applicant said the proposal would be a single mixed‑use tower with ground‑floor commercial and residential units above; parking would be incorporated within the building. - Zoning/requests: the DA materials list roughly 22 code modifications the applicant is considering; the applicant stated they seek the Lake Commercial baseline and anticipated asking for height and setback modifications (applicant cited a potential 510‑foot height in conversation as an upper planning target for negotiation). - Environmental and superiority elements touted by the applicant: increased stormwater treatment (including capturing runoff from adjacent Riverside Drive), removal of existing impervious cover near the shoreline, expanded riparian planting and site restoration compared with current conditions. - Potential dock and boardwalk connections: the applicant identified a desire to preserve or provide a dock/boat access and to coordinate with park staff regarding connections to the adjacent boardwalk; staff said coordination with Parks and Recreation and other departments would be required and that any dock or boardwalk tie‑in could set precedent.

Public comment and commissioner questions Public comment from neighborhood and watershed advocates urged stricter adherence to the waterfront overlay and existing neighborhood plans, opposed new private docks, and opposed uses such as automotive sales or light manufacturing near the lake. The Saver Springs Alliance speaker urged that redevelopment remove encroachments into the primary setback and cautioned against allowing incremental permissions that undermine long‑term waterfront protections.

Commissioners asked for more detail on multiple issues that they said are essential before they could recommend a PUD: specific superiority elements tied to measurable environmental gains, visual massing and renderings showing 510‑foot versus lower heights, precise impervious‑cover calculations (applicant said the new project would reduce impervious cover vs. the current parking‑lot condition), bird‑friendly glazing and other bird‑protection measures, the nature and public access for any proposed dock, and how the proposal would mesh with the South Central Waterfront strategy and planned porosity from the Riverside Drive corridor down to the trail and boardwalk.

Process and next steps City staff explained the development assessment (DA) is an initial, advisory briefing that precedes a formal PUD application and staff recommendation. After the DA the applicant must submit a formal PUD application and staff reports; the project would then go to Planning Commission and City Council. Commissioners asked the applicant to return with more detailed materials (site renderings, a parking/traffic plan, clarified code modifications, specifics of water‑quality and bird‑friendly design measures, and proposed public‑access features) to allow a substantive review and recommendation at the PUD stage.

Ending: Commissioners and public commenters generally supported restoration of riparian habitat and improved water quality compared with the existing surfaced parking lot but asked for measurable commitments and renderings to judge whether a PUD and the requested deviations from the waterfront overlay would produce public benefits that justify approvals.