Creating a Capital Plan to Meet Infrastructure Sustainability and Wet Weather Compliance Program Needs
Abstract:The City of Virginia Beach has a large wastewater collection and conveyance system that includes 1500 miles of pipe and more than 400 pump stations. The City is a party to a regional Special Order by Consent (SOC) aimed at reducing sanitary sewer overflows (SSOs). The SOC requires the City and the other 14 participants to the SOC to prepare a Rehabilitation Plan and Regional Wet Weather Management Plan that will heavily impact the City's capital program over the next 20 years.
The City has been proactive in planning and implementing programs aimed at infrastructure sustainability. A Replacement Planning Model was developed that provided the City with a 20 year forecast of refurbishment and replacement (R/R) needs. These results were used to build a capital program that was focused on sustainability.
The SOC has caused the City to also plan for the compliance needs. The City's analysis has indicated that nearly 70 % of the sanitary sewer system has been classified as needing Sanitary Sewer Evaluation Surveys (SSES) and rehabilitation. Hydrologic and hydraulic modeling have indicated that there are areas of the system that have capacity challenges at higher levels of service. In addition, the City's Management, Operations and Maintenance (MOM) program has identified needs in non–SSES basins that add to the capital requirements.
The results of the City's planning efforts to forecast capital needs for both sustainability and compliance is a capital improvement plan (CIP) that increases from 25 million per year to nearly 50 million per year. This plan provides for both compliance and sustainability.
Document Type: Research Article
Publication date: 2011-01-01
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