49 Wrangler Road 36-inch Corrugated Metal Pipe Repair Project
Summary
SCH Number
2025081118
Public Agency
Ventura County Watershed Protection District
Document Title
49 Wrangler Road 36-inch Corrugated Metal Pipe Repair Project
Document Type
NOE - Notice of Exemption
Received
Posted
8/25/2025
Document Description
Watershed Protection (WP) is proposing to repair a 36-inch Corrugated Metal Pipe (CMP) to correct facility and erosion damage within its 15-foot-wide right of way easement on private property. A sinkhole and erosion damage observed following the 2023/2024 storm season resulted from corrosion leading to structural failure of the CMP, which carries residential street runoff from Wrangler Road to Bus Canyon Drain in Challenger Park in Simi Valley.
Approximately 145-feet of the 36-inch CMP from the existing manhole cover in the central area of the property to the downstream concrete collar located 20-feet upstream of the headwall will be repaired by filling damaged sections with a cement sand slurry mixture and then lining it with a cured-in-place pipe (CIPP). The eroded areas would be cleared of all debris and oversized rocks (greater and 3-inch diameter), backfilled with 70-cubic yards of imported earthen fill material from Runkle Stockpile, and recompacted to 90% relative density.
The 21-feet of CMP from the concrete collar to the headwall will be removed and replaced with 36-inch Class I Reinforced Concrete Pipe (RCP). The existing concrete headwall will be removed and replaced with grouted 1-ton rock riprap around the 36-inch Class I RCP. This new trapezoidal headwall will be 6-feet high from its footing apparent at ground surface, 25-feet in length at its top elevation, and approximately 4-feet wide, which is a minor increase of about 88 square feet. All work areas are outside of the bed and bank of the Bus Canyon Creek channel that traverses the park. Access to the work area will be from Wrangler Road via the property owner’s driveway and Bridle Path Homeowner’s Association (BPHA) trail.
Biological surveys will be performed before and periodically during work to identify and avoid sensitive biological resources, including nesting birds. No mature trees will be removed. A Final Program Environmental Impact Report (EIR) on Environmental Protection Measures for the Ongoing Routine Operations and Maintenance Program was prepared in May 2008 (State Clearinghouse No. 2002091107). All applicable Best Management Practices described in the EIR and subsequent regulatory permits will be used for the proposed project
Contact Information
Name
Jeff Palmer
Agency Name
Ventura County Watershed Protection District
Job Title
Assistant Director
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Location
Cities
Simi Valley
Counties
Ventura
Regions
Southern California
Cross Streets
49 Wrangler Road
Zip
93065
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 1 Existing Facilities, Section 15301; Class 2 Replacement or Reconstruction, Section 15302
Reasons for Exemption
The Project consists of repair work to an existing and established drainage pipe facility "Existing facilities...to provide...public utility services" (Sec. 15301[b]). The repairs would include the "reconstruction of an existing utility system and/or facility involving negligible or no expansions of capacity (Sec. 15302[c]). The proposed actions are necessary to maintain public safety and protect the developed property. Categorical exceptions do not apply to the project (Section 15300.2).
County Clerk
Ventura
Attachments
Notice of Exemption
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