If you are not happy with the results below please do another search
Timmons Group is providing drainage and street improvement services to reduce water impacts and minimize safety concerns for several neighborhoods in northern Norfolk, VA. With resident flooding and water ponding complaints after recent construction in the area and no formal drainage infrastructure, something had to be improved to get the water away safely and quickly. […]
Fairfax County currently utilizes over 110 Public Porous Paver/Pavement Best Management Practices. As area percentages of impervious surface increase, such BMPs are an increasingly popular stormwater facility type. The recommended maintenance for these facilities can be costly. As such, effective management requires a better understanding of maintenance type and intensity. Working with GKY, Fairfax […]
A ‘High Hazard’ dam has the potential to cause loss of human life or damage to critical infrastructure if there were to be a failure of the structure. These structures require regular monitoring and specific observations during flood watch alerts and other high-risk events per the Virginia Dam Safety Act and outlined in the required […]
Under Section 22 of Water Resource Development Act (WRDA) of 1974 (PL 93-251), United States Army Corps of Engineers (USACE) can provide states, local governments, other non-federal entities, and eligible Native American Indian tribes assistance in the preparation of comprehensive plans and technical assistance in support of water and related land resources.. This is generally […]
Stormwater Master Planning helps to identify where future investments are needed by deficiencies of the existing stormwater system. At the planning stage, many assumptions are made, which are based on the best available information. But what happens when elements of that Master Plan move into design and field discoveries and phasing plans challenge these assumptions? […]
Among the challenges faced by municipal stormwater management programs, the management of invasive flora and fauna often prove as challenging as any. In recent years, Fairfax County, among only a handful of Virginia jurisdictions, has discovered an invasive plant that threatens both County stormwater quality as well as the functionality of the stormwater retention basins […]
In the face of increasing average annual rainfall totals, Washington, DC, has sought to better control its runoff over the last decade through the use of Best Management Practices (BMPs). This research seeks to detect where DC could improve its stormwater management in the Rock Creek watershed by using a Python code to recreate the […]
Driven by more intense rainfall, expansion of impervious surfaces, and aging drainage infrastructure, flash flooding in urban areas is becoming increasingly commonplace across the United States. Providing flood relief in fully developed areas is expensive and almost always subject to space constraints. Using the 2D modeling capabilities of software such as XPSWMM can reveal complexities […]
Historically, stormwater utilities (SWUs) in Virginia and around the country have primarily utilized the impervious surface rate methodology to develop the billing unit by which the SWUs fees are charged. In its simplest form, the SWU uses either a sample of several hundred single-family residential (SFR) parcels or an entire SFR parcel planimetric dataset, to […]
DCR Dam Safety requires annual inspections of all regulated dams. Whether the inspection is by the owner or the engineer, this is more than filling out a form. The observations pertaining to maintenance, access, seepage, settlement, etc. can be indicators of larger changes that are occurring at the dam, riser, or outfall. Dam inspections are […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
