Guidelines for Culvert Construction to Accommodate Fish & Wildlife Movement and Passage
Arizona Game and Fish Department, Habitat Branch - 2006
Organization: Arizona Game and Fish Department
This document is intended as a general guideline to assist in the design, planning, and placement of culverts to minimize impacts to and ensure fish and wildlife passage and movement.
Culverts are used in road, bridge, and berm construction to prevent flooding and washing out of roads. They also minimize erosion, build-up of standing water, and provide pathways for run-off.
Recent dramatic increases in urban, highway, and road development have increased interactions with wildlife and led to fragmented habitat. Each year in the United States, more than 200 motorists are killed and thousands more are injured in animal-vehicle collisions; property damage is measured in the millions, and billions of animals are injured or killed. Inadequate size, poor design, poor placement, and insufficient availability result in limited use or avoidance of culverts by wildlife and fish. Since hydrological structures may not be adequate, crossing structures developed specifically for wildlife passage are now being incorporated into roadway designs. Projects currently in the planning stages are now being developed to provide for drainage as well as fish passage and wildlife movement. Employing multiple-use designs allows planners proactively employ comprehensive strategies that incorporate watershed integrity, habitat connectivity, and provide cost savings by decreasing collisions, injuries to humans, and damage to vehicles.
Document Type: BMP
Project Type: fencing
Infrastructure Asset: large underpass
Fauna: small mammals