Sprig Lake Watershed Culvert Replacement
Summary
SCH Number
2006038539
Public Agency
Santa Clara County
Document Title
Sprig Lake Watershed Culvert Replacement
Document Type
NOE - Notice of Exemption
Received
Posted
3/28/2006
Document Description
Santa Clara County Parks will be replacing 16 culverts along the Blackhawk Canyon Trail (10 culverts), Merry-go-round Trail (4 culverts) and the Sprig Lake access road (2 culverts). Culvert replacements are along seasonal cross drainages, except one culvert which will be along an unnamed intermittent stream that runs parallel to Merry-go-round trail.
All work will be performed when no water is present. Areas where exposed soil has been disturbed will be compacted and re-vegetated.
Current culvert configuration and design are shallow and undersized with no outflow protection or headwalls. Replacements will have outflow protections, loose rock headwalls, appropriately-sized and with proper slope. In addition to culvert replacements, County Parks will be placing 600 square feet of rip-rap to reduce erosion and sedimentation due to water run-off from Hwy. 152.
Culverts will be replaced to enhance steelhead habitat and reduce sediment loading in tributaries of Bodfish Creek. Project will benefit steelhead spawning habitat by reducing sedimentation related to poorly designed, undersized, degraded culverts, improve fish access in spawning stream by installing a flat bottom culvert, and reduce sedimentation loading through erosion from water run-off from Hwy. 152.
Contact Information
Name
Khoa Vo
Agency Name
Santa Clara County Parks and Recreation Department
Contact Types
Lead/Public Agency
Phone
Location
Cities
Gilroy
Counties
Santa Clara
Other Location Info
Mt. Madonna County Park
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Section 15301(i), 15304(d)
Reasons for Exemption
The project replaces/reconstructs existing degraded structures, which are currently insufficient and have potential access obstacles for steelhead. Repairs/reconstruction will improve site conditions related to water flow/drainage, reducing erosion and sedimentation. The project will also bring the system up to acceptable standards for the protection of aquatic wildlife species and fisheries, as well as maintenance of County Park trail system.
Replacement of culverts along cross drainages will decrease sedimentation flow and decrease potential for culvert blockage, installation of headwalls and outflow protection will decrease sedimentation. Installation of rip-rap will reduce erosion and sedimentation resulting from run-off from Hwy. 152. These repairs plus the replacement of a stream culvert at Sprig Lake Road will allow for better steelhead access to spawning habitat.
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.