Top 10 Stormwater Management Review Items :

STORMWATER MANAGEMENT REVIEW ITEMS for LOUDOUN COUNTY

JANUARY 2010 EDITION

Prepared by Building & Development Water Resources Team Members: Jimmy Edmonds, Ryan Sauder, Ali Bokaee, & Zhongqiang Zhu

The following items are stormwater design issues that are most often omitted, incomplete, or presented inaccurately. Along with the 10 topics, we include “what we are looking for” in order to satisfy the related County requirements.

While we believe that these recommendations are consistent with the intent of the County’s Facilities Standards Manual, approved references, and related ordinances, some may present a combination of information from several sources. It is important to note that these items are “recommendations” and there are other, equivalent methods and strategies which can be presented to meet County standards. However, in preparing this document, it is our goal to both enhance the quality of stormwater management plans and reduce review times.

Future Updates to the

We plan to revisit these recommendations at least annually and possibly semi-annually, should the need arise. Significant changes to the State Stormwater Management Handbook and Regulations in the future may also prompt a re-evaluation of the information provided.

Abbreviations Used:

Ac = Acre
BMP = best management practice
B & D = Loudoun County, Dept. of Building & Development
DA = drainage area
DCR = Virginia Department of Conservation & Recreation
DGS = Loudoun County, Dept. of General Services

fps = feet per second
FSM = Loudoun County Facilities Standards Manual
NRCS = Natural Resources Conservation Service
pvc = polyvinyl chloride (pipe)
Std. & Spec. = standard and specification
T c = time of concentration
T t = travel time
Virginia SWM Handbook = Virginia Stormwater Management Handbook
VDOT = Virginia Department of Transportation
VESCH = Virginia Erosion and Sediment Control Handbook
WSE = water surface elevation

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