- Reclamation
- California Great Basin Region
- NEPA
- Project Detail
Title: | Boca Dam Safety of Dams Modification Project |
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Summary: | Based upon extensive engineering analysis, Boca Dam is at risk from structural failure during an earthquake due to the presence of sand and gravel within the dam's foundation. Reclamation proposes to excavate material from within Boca Reservoir to construct a shear key and stability berm on the downstream face of the dam, and modify the spillway crest structure. Boca Reservoir will be temporarily lowered to elevation 5,581 feet (NAVD88) in the first year of construction from June 15 to November 15, 2019. Construction will conclude by October 2020. The project will reduce seismic risks and meet Reclamation's interim public protection guidelines. |
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Jamie Griffin | (916) 978-5035 | N/A | jgriffin@usbr.gov |
04/09/2018 | EA/IS completed and FONSI signed on April 9, 2018. EA/IS was available for public review January 3, 2018 through February 1, 2018. |
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File | Report Title | File Ext | File Size |
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FONSI - Boca Dam Safety of Dams Modification Project | 353,967 B | ||
EA/IS - Boca Dam Safety of Dams Modification Project | 2,603,355 B | ||
EA/IS, Appendices A-D - Boca Dam Safety of Dams Modification Project | 3,717,913 B | ||
Draft EA/IS - Boca Dam Safety of Dams Modification Project | 5,388,676 B | ||
Draft EA/IS, Appendices A-C - Boca Dam Safety of Dams Modification Project | 2,388,865 B |