Water Transmission Pipeline Seismic Hazard Mitigation at the Santa Rosa Creek Crossing
Summary
- SCH Number
- 2021020029
- Public Agency
- Sonoma County Water Agency
- Document Title
- Water Transmission Pipeline Seismic Hazard Mitigation at the Santa Rosa Creek Crossing
- Document Type
- NOE - Notice of Exemption
- Received
- Posted
- 2/2/2021
- Present Land Use
- Public Right of Way
- Document Description
- An existing section of the Santa Rosa Creek Aqueduct crosses under Santa Rosa Creek and is at risk of failure during an earthquake due to liquefaction and lateral spread. The proposed project would help to reduce failure of this section of the Santa Rosa Aqueduct due to earthquake-induced liquefaction and lateral spread by relocating a section of pipeline (approx. 730 ft.) from the existing stream crossing to a location downstream under E Street and Sonoma Avenue. The relocated pipeline would use a trench-less technology to tunnel under the existing E Street Bridge and concrete box culvert into which the creek currently flows. The expected result is that the project would eliminate the Santa Rosa Aqueduct’s exposure to the free face of the creek and would help to reduce the risk of failure due to earthquake-induced liquefaction and lateral spread hazard at the existing pipeline stream crossing.
- Contact Information
-
Connie Barton
Sonoma County Water Agency
Lead/Public Agency
404 Aviation Blvd.
Santa Rosa, CA 95403
Phone : (707) 547-1905
connie.barton@scwa.ca.gov -
Sonoma County Water Agency
Project Applicant
Location
- Cities
- Santa Rosa
- Counties
- Sonoma
- Regions
- Citywide
- Cross Streets
- Sonoma Avenue and E Street
Notice of Exemption
- Exempt Status
- Categorical Exemption
- Type, Section or Code
- 15302(c) Replacement or Reconstruction and 15304(f) Minor Alterations to Land
- Reasons for Exemption
- The project would replace an existing utility system involving negligible or no expansion of use to reduce seismic vulnerability and meet public health and safety standards in a location near the same site as the existing pipeline and will have substantially the same purpose and capacity as the pipeline replaced. The project does not involve removal of healthy, mature, scenic trees. The project includes minor trenching and backfilling where surfaces are to be restored.
Attachments
- Notice of Exemption
- OCR SCWA Santa Rosa Creek Crossing Project NOE PDF 1602 K
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