Crawford and East Diamond Ditch Culvert Replacement and Diversion Dam Maintenance Project
Summary
SCH Number
2024060612
Public Agency
El Dorado Irrigation District
Document Title
Crawford and East Diamond Ditch Culvert Replacement and Diversion Dam Maintenance Project
Document Type
NOE - Notice of Exemption
Received
Posted
6/13/2024
Document Description
The El Dorado Irrigation District (District) proposes to replace two culverts and conduct maintenance on the diversion dam on the Crawford and East Diamond Ditch system.
Culvert Replacement
The culverts to be replaced are located on Linda Lane (Crawford Ditch) and Big Oak Road (East Diamond Ditch) in unincorporated Placerville, CA. The culverts have reached the end of their service life and have partially collapsed causing undermining and deterioration of the overlaying roadways. The culvert replacement would involve excavating and removing the existing concrete/metal culverts and replacing them with upgraded high-density polyethylene culverts. The new culverts will be installed in the same position as the existing culverts and will not require disturbance of the adjacent ditch system trough, bank, or bench. The culverts will be backfilled with excavated and/or imported material and the overlying roadways will be restored to pre-project grade and resurfaced with equivalent materials. Construction equipment is anticipated to include: a small excavator/backhoe, dump truck, compactor, pickup truck, and miscellaneous hand and power tools. Disposal of construction debris/materials will be conducted in accordance with all applicable regulations. Appropriate best management practices (e.g., straw bales, non-monofilament fiber rolls, biodegradable wattles, silt fence, etc.) will be used to ensure disturbed areas are stabilized to prevent soil erosion.
Diversion Dam Maintenance
The ditch system utilizes a section of Hunchup Creek (formally Squaw Hollow Creek) to convey flows for approximately one mile from the Crawford Ditch to the East Diamond Ditch diversion dam located to the west of Oak Hill Road in unincorporated Placerville, CA. The diversion dam directs flows into the East Diamond Ditch conveyance system. The diversion dam is a concrete structure approximately 35 feet long, 4 feet high, and 2 feet wide. Several portions of the dam face have sustained damage from high flows and debris during winter storm events. Hunchup Creek is an ephemeral creek that does not flow year-round and project activities will take place when seasonal flows have subsided and the ditch flows have been temporarily paused in order to conduct project activities in dry conditions. Project activities involve resurfacing the upstream face of the dam by applying an approximate 4-inch layer of reinforced concrete along the length of the dam. Accumulated sediment will be removed to expose the entire face of the dam and resurfacing the dam will not result in more than a de minimis amount of new material to be added to the diversion dam. The concrete forms will be constructed and the new concrete layer will be applied in one workday. The concrete will cure for a minimum of three days before the forms are removed and ditch flows are restored to Hunchup Creek.
Contact Information
Name
Doug Venable
Agency Name
El Dorado Irrigation District
Job Title
Environmental Review Analyst
Contact Types
Lead/Public Agency
Phone
Email
Location
Cities
Diamond Springs, Unincorporated Placerville
Counties
El Dorado
Regions
Countywide
Cross Streets
Linda Lane, Big Oak Road
Zip
95667
Total Acres
0
Parcel #
N/A
State Highways
N/A
Railways
N/A
Airports
N/A
Schools
N/A
Waterways
Hunchup Creek
Township
9N
Range
11E
Section
1,32
Base
M.D.M
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 1 – CCR, Title 14, Sec. 15301 & Class 2 – CCR, Title 14, Sec. 15302
Reasons for Exemption
The project consists of the maintenance and replacement of existing facilities that involve no expansion of use or capacity. None of the exceptions to these exemptions, as identified under CCR, Title 14, Section 15300.2, apply to this project, including; located in an area of hazardous or critical concern, cumulative impact, significant effect due to unusual circumstances, scenic highways, hazardous waste sites, and historical resources.
County Clerk
El Dorado
Attachments
Notice of Exemption
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