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FPV03 Velasco Memorial Tidal Gate and Floodwalls

SALIENT FEATURES

  •  Coastal Hurricane and Storm Damage Reduction

  •  Foundation Design

  •  Drainage Structure

  •  Sluice Gates

  •  Steel and Concrete Design

  •  Alternative Analysis

  •  Construction Cost: $206M+


CLIENT

US Army Corps of Engineers (USACE), Galveston District

LOCATION:

Freeport, Texas

BACKGROUND

The Freeport and Vicinity CSRM project is located at the coastal plains of the southern Brazoria County, about 48 miles southwest of Galveston, Texas. The existing system protects multiple chemical plants, in addition to the cities of Freeport and Oyster Creek. In 2019, it was predicted that up to $3B of estimated damage would occur if the system were to fail. Therefore, USACE SWG initiated flood protection system upgrade at the Freeport and Vicinity to minimize potential damage to existing infrastructure.

PROJECT FEATURE

infraTECH was responsible for the assessment of the existing Velasco Memorial Tidal Gate, design drainage structure 16, and the design of the A-801 pump station fronting protection. The tide gate was found to be deficient based on the latest S2G design criteria. Two conceptual retrofit alternatives were developed. The final retrofit design included an addition of a steel pipe pile foundation, a pile cap addition, pier and wall modification, and strengthening of the existing gate leaf. The drainage structure was replaced in kind with a 97’-6”, 5’x5’ double barrel culvert with sluice gate closure, and headwalls. The A-801 pump station intake structure fronting protection required the construction of a 44-foot-tall T wall, with steel pipe pile foundation.

RELEVANT SERVICES

infraTECH worked as a teaming partner to AECOM - HDR JV and designed tidal gate deep foundation retrofit, steel gate strengthening, pile founded T-wall, and Sluice gate, drainage structures, and support of excavation.

"Overall, infraTECH is a team player and supported AECOM as needed to complete the assigned work. infraTECH has proven themselves to work effectively as an extension of our team. infraTECH has a high performing team that always submits the highest quality deliverables on time and within the contracted budget. We have seen firsthand that they do what it takes to get the job done correctly, including working long hours. I believe their dedication stems from their taking ownership of their scope. We are utilizing infraTECH on other Task Orders on this contract due to their “can do attitude”, teamwork and quality deliverables."

Kimberly Heenan, PE

AECOM-HDR Galveston JV PM

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