CSN Technical Bulletins

A Visual Guide for Constructing, Inspecting, Maintaining and Verifying the Bioretention Practice

This Technical Bulletin outlines the best current science on urban stormwater nutrient management, and is intended to help states and local governments define their baseline loads and choose the most cost effective combination of practices to
meet their local load allocations under the Chesapeake Bay TMDL.

Watershed managers are increasingly interested in isolating the land cover components of urban land use (turf cover, impervious cover and forest cover) in order to obtain better predictions about current and future runoff, pollutant export and stream quality.

In the last year there has been growing recognition about the need to expand pollution prevention activities, particularly at federal facilities.

This technical bulletin is intended to accompany the ESD to MEP spreadsheet compliance tool that was developed to simplify compliance with the 2008 MDE stormwater management regulations.

Managing the quality of stormwater runoff from redevelopment projects in highly urban watersheds can be complex and controversial.

The objective of this memo is to provide the scientific basis for creating a workable engineering framework for runoff reduction and stormwater treatment practices.

The Impervious Cover Model (ICM) was first proposed in 1994 as a management tool to diagnose the severity of future stream problems in urban subwatersheds.

Most stormwater practices were originally developed in the Piedmont physiographic region and have not been adapted for much different conditions in the coastal plain.