De Zavala Road PH I (CoSA)

De Zavala Road PH I (CoSA)

Role: Prime   |   Agency Client: City of San Antonio, Capital Improvements Management Services

Poznecki-Camarillo, Inc. (PCI) prepared plans following a newly implemented Design Guidance Manual. PCI was involved throughout the construction phase for the widening and reconstruction of De Zavala Road from Babcock to Cogburn to accommodate five lanes, including a continuous two-way left-turn median and an extra-wide outside lane to help accommodate bike users and improve a low water crossing.

The proposed work also included constructing curbs, sidewalks, driveways, storm sewer system, a Contributing Zone Plan (CZP) with a sedimentation/filtration pond, a culvert crossing, relocation of the existing sanitary sewer, water line, CPS gas main, Grey Forest gas main, and a new AT&T duct bank. PCI coordinated four traffic signal upgrades and new ADA-compliant wheelchair ramps. The project included extensive utility coordination and joint-bidding with SAWS for the replacement of 9,200 LF of 8-inch and 12-inch water main, sanitary sewer adjustments, ROW acquisition, CPS utility pole relocations, AT&T duct bank relocations, CPS gas main relocations, and TCEQ coordination and permit for a WPAP consisting of a sedimentation pond.

Other services for the reconstruction of the road included a design survey, ROW acquisition survey, horizontal and vertical alignment design, four-phase traffic control plans, typical section design, signing and striping, culvert layouts, traffic signal replacement, new storm sewer system, stormwater pollution prevention plans, in-line detention storm sewer lines, a water quality pond, and a tree preservation plan. The low water crossing consisted of replacing the existing 24” RCP with two 5ft x 4ft multiple box culvert as well as an additional storm sewer outfall structure. Due to high velocities, dissipaters were designed to mitigate velocities and stone rip-rap added for stability.

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