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WRA to Present at Water Jam 2016.
September 12th, 2016
WRA will take part in the 2016 WaterJAM conference, taking place on September 12, 2016 in Virginia Beach, VA. The annual conference is hosted by the Virginia Section of the American Water Works Association (VA AWWA), the largest nonprofit, scientific and educational association dedicated to managing and treating water, and the Virginia Water Environment Association (VWEA), a volunteer-based organization with leaders and members from all across Virginia.
WRA employees Dean Westman, Allan Fontanilla, Bruce Schwenneker, and John Thomas will be giving the following presentations: Restoration of a Sanitary Sewer Interceptor Easement – Good Engineering Management and Sound Environmental Stewardship, Conditional Assessments to Ensure the Reliability of Arlington County’s Water Supply, Methods for Reducing MS4 Pollutant Removals Required by the Chesapeake Bay TMDL Action Plans, and Hampton Roads Sanitation District King William Treatment Plan Effluent Utilization - Water Reuse, a Success Story.
The first article, written by Dean Westman, discusses Sustainability and Water Reuse. Pipeline easements are an essential but often overlooked component of infrastructure planning, design and management. This presentation describes the acquisition, restoration and long term management of the easement for a large diameter interceptor sewer located in a pristine natural public park containing woodlands, wetlands, rare and endangered plant and animal species and historical resources and sites. Engineers and environmental scientists collaborated to develop construction and restoration methods that greatly reduced environmental impacts to the easement and surrounding land, creating a better environment than previously existed. The project case study provides valuable lessons in environmental sustainable utility planning, construction and management.
The next article, written by Allan Fontanilla, Aman Tuteja and Joe Cogswell of the Arlington County Department of Environmental Services, discusses Condition Assessment. The Chain Bridge is a well-known viaduct in the D.C. Metropolitan region that crosses the Potomac River in the vicinity of Chain Bridge, which connects Washington D.C. with Arlington and Fairfax counties in Virginia. Less well-known are the pipelines that supply water from the Dalecarlia Water Treatment Plant to Arlington County, via three (3) 20-inch water mains and a 48-inch water main. A series of breaks to these water mains led to various conditional assessments being performed to ensure system reliability. Field inspection and conditional reassessment were performed on the 48-inch water main crossing by way of a subaqueous pipeline inspection and surveying. The work also involved an underwater dive inspection, hydrographic survey, and sonar scanning of the water main in areas identified as concerns. The high flows in the Potomac River proved challenging and required innovative methods to conduct the survey.
The next article, written by Bruce Schwenneker and Nathan Sturre, discusses the Reduction of Municipal Separate Storm Sewer System (MS4) Pollutants. On December 29, 2010, the U.S. Environmental Protection Agency established the Chesapeake Bay Total Maximum Daily Load (TMDL), a comprehensive "pollution diet" for the Bay, necessary to meet applicable water quality standards. The TMDL requires a 25 percent reduction in nitrogen, 24 percent reduction in phosphorus and 20 percent reduction in sediment from the 6 states and the District of Columbia in the Bay watershed. The Commonwealth of Virginia submitted and submitted its Phase I and Phase II Watershed Implementation Plans (WIPs) that provide the strategies by which it will reduce its pollutant loadings to meet the TMDL. One of its strategies requires the Municipal Separate Storm Sewer System (MS4) permits to achieve specified reductions in nitrogen, phosphorus and suspended solids loads from its regulated land over three 5-year permit cycles ending in 2028. Communities with MS4 permits may be able to reduce their required loading reductions by delineating the drainage basins of each outfall rather than developing the required reductions based on the land uses of the designated urbanized area. The results of two Phase II communities and examples from a Phase I community are presented to demonstrate the tremendous savings that can be achieved in their TMDL compliance plans.
The final article, written by John Thomas highlights successful water use projects in the area. The King William Sewage Treatment Plant currently discharges its effluent into Moncuin Creek in King William County, VA. The plant currently performs costly additional treatment prior to discharge. A local Industry relies heavily on ground water pumped from a well on site. Discussions began in November 2012 with the local Industry and the project was advertised in April 2015. HRSD is excited to bring a reuse project to the area from which both HRSD and local industry will benefit This project consists of two miles of 6-inch HDPE pipe, a pump station to deliver the water from the King William Sewage Treatment Plant to the local Industry, and metering and controls. The presentation will summarize design requirement including pump selection, surge protection, expedited design, design of receiving facilities at the local Industry, future expandability, and permitting issues. The construction of the pipeline and pump station will be completed in February 2016.
Please stop by to hear WRA presentations at the upcoming WaterJAM conference in Virginia Beach, VA.