Stampede Dam finishing upgrades, Boca up next
After nearly two years, the Bureau of Reclamation is finishing $22 million in renovations to Stampede Dam.
Small renovations go through November, but Dog Valley Road, the road that run across the dam, is now open after being closed for a year and a half.
Stampede Dam has been raised by 11.5 feet to address safety concerns related to large flood events. According to the Bureau of Reclamation's website major project features include:
Constructing a Mechanically Stabilized Earth (MSE) wall over the dam and dike.
Constructing two small dikes near the south end of the reservoir to fill low-lying areas of the reservoir rim.
Reconstructing the spillway crest structure to limit outflows during large floods to the current spillway chute capacity.
Boca Reservoir will soon see major renovations as well.
Beginning Spring 2019, a roughly 30 million dollar project will commence on the dam to reduce risk of structural failure during an earthquake. The Bureau states that Boca Reservoir is at risk due to the presence of sand and gravel within the dam's foundation.
According to the Bureau's website: "The Safety of Dams Act requires Reclamation to reduce the risk of Boca Dam structural failure within acceptable levels. Reclamation plans to modify Boca Dam by removing a sand and gravel lens on the downstream side of the dam; a downstream stability berm will be constructed to buttress the dam in the event of an earthquake."
Boca Dam construction is expected to be complete by Fall 2020. The main road crossing the dam will be closed during construction.