2024 Patterson Drive Sinkhole Repair Project


SCH Number
Public Agency
El Dorado County
Document Title
2024 Patterson Drive Sinkhole Repair Project
Document Type
NOE - Notice of Exemption
Document Description
The 2024 Patterson Drive Sinkhole Repair Project is an El Dorado County Board of Supervisors declared emergency repair project to fix the sinkhole and associated drainage system failure at 4291 Patterson Drive. The Project consists of concrete driveway apron demolition/ AC re-pave, trench excavation/shoring, drainage inlet replacement/installation, tie in existing 32" CMP drainage pipe at upstream and downstream locations of the drainage inlets, 34 lineal feet of 32" CMP drainage pipe replacement with 36" HDPE between the drainage inlets, trench slurry backfill, and trench HMA paving.

Contact Information

Brian Franklin
Agency Name
County of El Dorado Department of Transportation
Job Title
Senior Civil Engineer
Contact Types
Lead/Public Agency


Diamond Springs
El Dorado
Northern California
Other Location Info
4291 Patterson Drive

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Sec. 15301, Class l (c) and (d)
Reasons for Exemption
The work consists of repair and replacement of the damaged existing public facility involving negligible expansion of use beyond that existing at the time of this determination. The repairs to existing facilities will improve and maintain the existing storm drainage system and roadway surface at and adjacent to the location of the sinkhole within County right of way at 4291 Patterson Drive.
County Clerk
El Dorado


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