Buckeye Flood Retardings Structure

This is a CMAR project for Phase I of rehabilitating the FRS No. 1 embankment between Johnson Road and the principal outlet by constructing a central filter and removing an existing irrigation outlet. Hunter Contracting Co.’s team worked through preconstruction, developing a work plan, providing constructability review and cost models, and participating in failure modes and effects analysis. The project included eliminating/ mitigating current dam safety deficiencies and failure modes regarding FRS No. 1, maintaining/improving upon the flood protection level provided by FRS No. 1 for the 100-year life of the rehabilitated structure. Clearing and grubbing, installing central filter trench, removal of outlet in the dam embankment, and placing rock mulch on the slopes were items of work on sleep terrain that utilized heavy equipment.

Client:
Flood Control District of Maricopa County
Completion:
March 2015
Delivery Method:
CMAR
Design Engineer:
Tetra Tech
Cost:
$7.1M
  • 2.5 mile trenches
  • (36 inches wide at depths ranging from 10 to 42 feet)
  • Centerline trench excavation and replacement
  • Central filter
  • rehabilitation
  • Clear and grub
  • Embankment crest fill
  • Geotextile fabric and central filter material
  • Irrigation outlet removal