MCM 5

Post-Construction Stormwater Management in New Development and Redevelopment

For the past two decades the rate of land development across the country has been more than two times greater than the rate of population growth. If unchecked, the increased impervious surface associated with this development will increase stormwater volume and degrade water quality, which can harm lakes, rivers, streams, and coastal areas.

The best way to mitigate stormwater impacts from new developments is to use practices to treat, store, and infiltrate runoff onsite before it can affect water bodies downstream. Innovative site designs that reduce imperviousness and smaller-scale low impact development practices dispersed throughout a site are excellent ways to achieve the goals of reducing flows and improving water quality.

Phase II MS4s are required to address post-construction stormwater runoff from new development and redevelopments that disturb one or more acres. This primarily includes developing:

Strategies to implement a combination of structural and non-structural BMPs,
An ordinance to address post-construction runoff, and
A program to ensure adequate long-term operation and maintenance of BMPs.

MCM 5

MCM 5: POSTCONSTRUCTION SOTRM WATER MANAGMENT
List of Post Constuction BMPs
EPA O&M Manual for BMPs

Departments

Mapping Reference Department

Keeps and perpetuates a section corner record book showing original government section corners. Checks and references yearly at least 5% of all corners shown in the record book and establishes, locates and references at least 5% of all original government section corners. This serves to create and maintain an accurate framework that all other land based government information is based on.
Stormwater

Manages the maintenance construction and reconstruction of all County Regulated (Legal) Drains in conjunction with the Lake County Drainage Board & Advisory Committee. Click here to find out what the Surveyor's Office is doing to coordinate area wide and county wide stormwater management efforts.
MS4 Stormwater Quality

According to U.S. EPA, polluted storm water runoff is a leading cause of impairment to the nearly 40 percent of surveyed U.S. water bodies. Click_here to find out how Lake County is combating this problem in the unincorporated areas and what you can do to help.
Geographic Information Services

It is estimated that more than eighty percent of governmental functions are associated with managing information about specific locations or geographic areas. A Geographic Information System (GIS) is a computer system for the input, editing, storage, maintenance, management, retrieval, analysis, and output of geographically referenced information. GIS supports applications such as stormwater maintenance projects, land planning, Homeland Security,law enforcement, property appraisal, civil engineering, natural resource monitoring, transportation planning, public health and environmental analysis, economic development, census analysis, and much more.
Government Center Green Roof?

As the county continues to develop as a highly urbanized society, the loss of pervious surface is an unavoidable consequence resulting in the loss of water absorption which decreases water quality and increases flooding. We propose a "green roof" for the county complex, which would be both functional and a useful demonstration project.