Location
 15.6 miles from the ocean
Owner
 Ventura County Public Works Agency – Watershed Protection  (VCPWA-WP)
Date Constructed
 1947
Purpose
 Water supply and flood control
Pre-construction estimated cost
 $682,000
Actual construction cost
 ~$4 million
Constructed height
 198 feet (1,125 elevation)
Current height
 168 feet (1,095 elevation) (notched in 1965, 1977)
Width
 620 feet
Thickness
 8 feet at crest, 35 feet at base
Reservoir Capacity: Design
 7,018 acre feet
Reservoir Capacity: After notching
 3,800 acre feet (excluding sedimentation losses)
Reservoir Capacity: Current
 Less than 100 acre feet by mid-2020 due to ongoing sedimentation losses
Reservoir Capacity: Projected
 Zero capacity before 2030
Original Reservoir Area
 126.8 acres
Drainage area of Matilija Creek above dam site
 55 square miles
Original Spillway Capacity
 60,000 cubic feet per second at water elevation 1,137 feet