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31

2021 Update-Phase III of the Chesapeake Bay Watershed Implementation Plan, Agricultural Sector Goals and Actions Part 1

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One year after sediment and nutrient reduction goals were finalized, Virginia’s agricultural sector is working hard to meet these goals.  This presentation will provide an update to agricultural sector goals and what the Department of Conservation and Recreation, in partnership with Soil and Water Conservation Districts and the USDA-Natural Resources Conservation Service, is doing to […]

33

Everything in Life Must Have Balance…Including Water Quality and Quantity

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Virginia Beach, is experiencing more frequent flooding due to sea level rise, increased storm intensity, and aging infrastructure. These issues coupled with tidal impacts and low elevations has resulted in severe flooding in portions of the City. Hurricane Matthew (2016) resulted in the worst structural flooding ever experienced.  As a result, the City embarked upon […]

34

Northern Virginia Stream Restoration Bank (NVSRB) – Wetland Success?? Case Study of an Urban Stream Priority 1 Restoration Project Restoring Riparian Wetlands

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Wetland Studies and Solutions, Inc. (WSSI), a Davey Company, established the NVSRB in 2006 as the first dedicated stream mitigation bank in Virginia. The approval process began in 2004, culminating in approval of the bank in 2006.  Construction on the first reach began in 2008, with the final reach completed in 2019 (including a 5-year […]

35

Delegating Well: Examining Best Practices When Outsourcing Development Plan Review

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As the responsibilities of municipal stormwater personnel continue to grow, development plan review is becoming an increasingly popular item that can be effectively outsourced. This presentation will focus on best practices and lessons learned from performing hundreds of development plan reviews for two localities in Virginia and include: How to effectively manage client communication How […]

36

Leveraging PCSWMM to Improve Neighborhood Floodplain Modeling

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Neighborhood residential and structural flooding is one of the worst aspects of any significant rainfall event. In undersized drainage systems, even a small downpour can quickly flood streets, yards, and seep into the homes of unsuspecting citizens. Municipalities are often faced with the challenge of improving localized flooding in these areas with limited knowledge on […]

37

How to Drain an Impoundment – Design, Repair and Replacement

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The Virginia Impounding Structure Regulations (Regulations) require that low-level outlet systems in existing dams be kept operational. For dams built without low-level outlet systems, the Regulations stipulate that low-level outlet systems be retrofitted when practicable. In December 2020, the Department of Conservation and Recreation (DCR) and Virginia Soil and Water Conservation Board published a new […]

38

Brighton Dam Rehabilitation

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The Brighton Dam is a concrete slab and buttress dam that has been in continual service for over 75 years.  Over those years, the dam developed a number of deficiencies that resulted in a reduction of the safety of the dam and increased difficulties in operation of the dam to its full capacity. These deficiencies […]

39

eLOMA – A Collaborative Tool for Licensed Professionals, Communities, and FEMA

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The Federal Emergency Management Agency’s (FEMA) eLOMA (Electronic Letter of Map Amendment) tool to provides licensed land surveyors and professional engineers with an internet-based system to submit a variety of LOMA requests as a faster alternative to using the standard application process.  The eLOMA tool is available to any licensed professional who registers through FEMA’s […]

40

Balancing Stream Restoration with Floodplain Ordinances

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As streams incise and erode, their vital interaction with the abandoned floodplain, or terrace, continues to decrease. This not only flushes excess sediment and pollutants downstream but separates the floodplain ecosystem from its source of life: the stream. Reconnecting the stream to a floodplain is critical for a successful restoration and has been incentivized through […]