WOODPATEL performed detailed hydrology in support of the rehabilitation design of White Tanks FRS No. 4. Storms evaluated included: 100-year, 24-hour; PSH; SDH; and site specific Probable Maximum Flood for multiple durations and storm distributions. The hydrologic analysis also evaluated current and MAG future land uses for the contributing watershed. Civil design and construction document development included: survey, flood pool grading, low-flow and outlet channels, principal spillway, auxiliary spillway, special provisions, cost estimates, design report documentation, and agency coordination. The refined inflow design floods enabled the team to reduce the proposed dam height by 3.5 feet and resulted in multi-million dollar cost savings. WOODPATEL also defined the design concept for the principal and auxiliary spillway outlet configuration and evaluated the hydraulic performance of the reservoir utilizing the unsteady state capabilities of HEC-RAS.
- 2018 APWA Public Works Project of the Year – Structures – $5-25 Million | APWA
- 2018 Engineering Excellence Award | ACEC
- 2018 Marvin M. Black Partnering Excellence Award | Associated General Contractors (AGC) National Chapter
- Build Arizona Award | Arizona Chapter Associated General Contractors of American
- Hydrologic models for multiple design storms to define the Inflow Design Floods
- Refined designed led to a multi-million dollar cost savings
Flood Control District of Maricopa and NRCS