Erosion and Flood Management

John Miller

Purpose of Erosion/ Sediment Control Codes◦ Promote Safety◦ Preserve Property values◦ Lessen burden on taxpayers for flood control◦ Improve community

Champaign Residential Erosion Planning

Erosion Prevention Practices

Sample Erosion Plan

Sample Erosion Plan

Sediment Fence Barrier◦ Fence with geotextile fabric to hinder flow of

sediment Grass Buffer Strip

◦ Wide strips of undisturbed vegetation consisting of grass or other resistant plants surrounding disturbed site

Stone Bag Inlet Protection◦ Stone filled woven bags place around drainage

inlets

Residential Erosion Control Tools

Rock Check Dam◦ Gravel or rock buildup in channels to slow down

flow of runoff Downspout Extender

◦ Piping to move downspout outlet away from erodible soil, yard

Erosion Control Blanket◦ Woven from selected material and tactically

placed to slow water flow

Residential Erosion Control Tools

Dams Channels Sea Walls Levees Etc.

Large Scale Erosion and Flood Control

In the Alleghany Highlands of western Virginia

Backs up the Jackson River for 12 miles to create Lake Moomaw

Created by Army Corps of Engineers Part of the Flood Control Act of 1946 Construction lasted from 1974-1979 Reservoir was filled by 1982

Gathright Dam Overview

Flood protection of industrial, commercial, and residential properties

Saves lives and money for residents and business owners

Project Scope for the Dam

Bird’s Eye View of Lake Moomaw

Rock fill embankment

Impervious Earthen Clay core

1,310 ft. Long 257 ft. high 1000 ft. wide at

base

Design

180 cu. Ft./ sec water flow

Checked regularly by engineers

Outlet Drain