Summary
2,580'-long earthen zoned embankment dam will be constructed with the following components: the embankment will be constructed of on-site materials, mainly clays of varying plasticity. The embankment is 78' tall. The upstream slope protection will consist of rock riprap. The owner will assist contractors finding quarries that have material meeting the project specifications. The foundation will contain a bentonite slurry wall that extends 70' below existing grade, a clay core trench and a grout curtain. A reinforced concrete labyrinth weir spillway. The spillway is 55' wide and 700' long. Wall heights range from 12' to 27' tall and will require mass placement of concrete. A reservoir drawdown system will be constructed with the following components: a 30'-tall reinforced concrete riser structure with multiple gates. An intake structure on the upstream end an impact basin at the downstream endpoint. A 60' drawdown pipe. An ecological flow intake and pipe to the riser structure.