Removing Matilija Dam:
- Why Remove Matilija Dam?
- Objectives
- Benefits from Removal
- Impacts: Habitat
- Impacts: Sediment
- Matilija Dam spilling
Final Design:
- Project Description
- Sediment Management
- Slurry Disposal
- Levees
- Bridges
- Robles Diversion modifications
- Arundo (giant reed) management
- Our Comments
Feasibility Study:
Early Progress:
Background Information:
About the Matilija Coalition:
Matilija Dam Facts:
Location: 15.6 miles from the
ocean within Los Padres National Forest
Date constructed: 1948
Purpose: water supply and flood control
Cost:
- Preconstruction Estimated
Cost: $682,000
- Actual Construction cost:
over $3 million
Height:
- Constructed height: 190
feet (1125 elev)
- Current height: 160 feet
(1095 elev) (notched in 1965, 1977)
Width: 620 feet
Thickness:
- Crest: 8 feet
- Base: 35 feet
Reservior Capacity:
- Design: 7,018 acre feet
- After notching: 3800 acre
feet (excluding sedimentation losses)
- Current: Less than 500 acre
feet (combined notching and sedimentation losses)
- Projected: zero capacity
by 2020
- 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 1137 feet
Photo: Matilija Dam today (Aug 2000)
