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41

The Applicability of Filter Compatibility Evaluation Procedures for Existing Embankment Dams – Hearthstone Lake Dam Case Study and General Evaluation and Design Considerations

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Hearthstone Lake Dam was constructed in the mid-1960s in Augusta County, Virginia, under the administration of the NRCS. The dam, which is classified as a high hazard structure by the VA DCR and the NRCS, is located on US Forest Service property but is owned and maintained by the Headwaters SWCD and Augusta County. The […]

42

“Weir” Here to Fix Your Flooding!

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The Lake Bradford / Chubb Lake Drainage Improvement Plan is a multi-phase engineering project to alleviate widespread flooding due to moderate rain events and during periods of high tides in the Chesapeake Bay. The Little Creek Basin, located in the City of Virginia Beach, Virginia, consists of both residential and commercial areas, along with the Joint Expeditionary Base […]

43

Engineered Ecosystems, a Cyborg Approach to Ecosystem Restoration – Grand Lake St. Mary’s Littoral Wetland Restoration

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Direct modification of an ecosystem as a whole is beyond the technological, physical and financial limitations of society. However, the resilience of the processes within the ecosystem can be used to synergize an effect on the system as a whole given proper nurturing and support. The initiation of this process may require establishing a symbiotic […]

44

Making Waves in Stormwater Master Planning: A Case Study on Project Prioritization in Linkhorn Bay

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To combat the challenges of increased storm intensity and sea level rise, the City of Virginia Beach Public Works Stormwater Engineering Center (City) is currently developing a Comprehensive Stormwater Master Plan (SWMP). The City has used several stormwater models that contain all the major drainage networks to identify areas where flooding is occurring, known as […]

45

Snakeden Branch at Lake Audubon Stream Restoration: A Tale of Constraints, Creativity, and Collaboration

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Under a Stream Stabilization/Restoration, Environmental, Permitting & Ancillary Services Basic Ordering Agreement, Stantec was awarded a Task Order by the Fairfax County Department of Public Works and Environmental Services (DPWES) to provide Stream Restoration Design and Construction Administration services for Snakeden Branch at Lake Audubon in Reston, Virginia. Initial scoping of the site (approximately 800 […]

46

Hydrilla-based Phytoremediation Water Quality Management Strategy to Reduce Lead Concentrations in an Urban Lake, Central Florida

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Urban lakes are common throughout the United States and are susceptible to anthropogenic inputs stemming from point and nonpoint source pollutions. In this study, effectiveness of an in situ water quality management strategy was investigated by employing phytoremediation and subsequent water quality modelling methodology for an urban lake, Lake Wire, in the downtown area of […]

48

An Interdisciplinary Approach for Determining Efficacy of Agricultural Best Management Practices

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Despite increasing numbers of agricultural best management practices (BMPs) on the landscape and billions of dollars spent on BMP programs, stream health continues to decline in Virginia due to agricultural nonpoint-source pollution. The efficacy of BMPs for restoring stream health is potentially enhanced or constrained by conditions in the stream and watershed, as well as […]

49

Problem to Product: Evaluating the Use of Stormwater Pond Algae to Bioremediate Ponds and Generate Compost

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While stormwater ponds are an effective best management practice for reducing stormwater runoff, often the algae that accumulates in them is considered a nuisance. Traditional treatments such as copper-based algaecides are not environmentally friendly, and other methods of removal can be costly and time consuming. Additionally, algae has a high capacity to remove contaminants from […]

50

Effects of Acid Mine Drainage and Strategies to Remediate

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Historical mining operations have left the country with abandoned mine lands and other nonpoint sources of pollution that produce Acid Mine Drainage (AMD).  When subsurface sulfide materials are exposed to oxygen and water, a sulfuric acid is produced that is capable of dissolving heavy metals and mobilizing them into solution.  This presentation will discuss analysis […]