Wastewater (West Virginia) - Anderson & Associates, Inc.

www.andassoc.com
Sewer System Analysis & GIS
Town of Blacksburg, Virginia
Firm’s Responsibility:
Surveying & Mapping
Owner:
Town of Blacksburg
300 South Main Street
Blacksburg, VA 24060
Ms. Adele Schirmer
540-961-1126
Completion Date:
Updated in 2005
For years the Town of Blacksburg has been monitoring sewer upgrades
and making adjustments on basic 24”X36” tax maps. As the
years passed and the sewer system became more complex, the growing
need for a computerized sewer mapping and modeling system
was apparent. The Town hired Anderson & Associates to map and
model the Sanitary Sewer System for incorporation into the Town’s
developing GIS (Geographic Information System).
The first step in the plan was surveying critical manhole sites (about
750) around the Town using GPS (Global Positioning Systems) and
conventional surveying. We located approximately 1/3 of the manholes
and the remainder of the manholes were digitized from sewer
mapping. The second step was to inspect the manholes to determine
flow capacity, elevation, pipe materials, and other information pertaining
to a given area. Field data was collected using a hand held computer.
After the implementation of the GIS, a user is able to click on
a specific point in the mapping and pull up a data base of information
including condition and available capacity of a specific sewer line.
In January 1996, the first phase of the Blacksburg Sewer project
was up and running. The interactive computer model of the sanitary
sewer system was the first step in setting up a sanitary sewer GIS to
assist in evaluating system capacity and reduction of infiltration and
inflow in the system.
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