Sources Sought for Design-Build Construction Services for Levee Access Manholes Project (Kansas City, KS)

DESIGN-BUILD: Design-build construction services to install approx.forty access manholes on existing seepage lines on a levee. The contractor would be responsible for design and construction of manholes on the landside levee slope and berm. The access manholes are needed to facilitate regular inspection of the existing seepage collection system. Minimally invasive excavation methods are preferred, to minimize excavations left unattended for more than 24 hours, that would risk stability of the levee. Any drilling and/or excavations must be in accordance with USACE Engineering Regulation (ER) 1110-1-1807, Drilling and Invasive Activities at Dams and Levees. This ER requires the driller to have a PE or RG with five years of experience drilling, and experience on at least two projects on dams or levees. A Drilling and Invasive Program Plan (DIPP) must be prepared by a licensed Professional Engineer or Geologist experienced in the type of activities proposed and approved by USACE prior to work. Max hole depth is estimated to be 35 feet deep. Contractor will be required to conduct their own investigations and survey if they deem it necessary. There is currently no access to the seepage line pipe, except for two manholes that were placed by the levee district using vacuum excavation in 2021. Temporary flood protection plans will be required to prevent the presence of open holes in the levee during a flood. Current levee crest elevation must always be maintained during construction, and all holes must be backfilled at a rate exceeding the river’s rise if a flood is anticipated.