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TOWN OF MORRISVILLE
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6.2.6 Sanitary Sewer Installation and Maintenance and Road Crossings
Proper design and installation of wastewater infrastructure reduces spills. The Town of Cary
operates the wastewater collection system for the Town of Morrisville under a Wastewater
Collection and Maintenance permit, issued by the NCDWR. To make sure that flow is not
exceeded, the Town uses a reconciliation process for new development. Through this process,
estimated flows from new developments are added to the actual sewer flow. When the
development is complete, the new flow is added to the system.
The Town of Cary’s Standard Specifications and Details of July 1, 2004, address the design of
pump stations, gravity sewers, and force mains to ensure proper design and installation while
limiting spills. The document lists the minimum design standards for construction of these
facilities, including standards for separation distances, materials, installation techniques, and
overall design.
As part of its riparian buffer program, the Town avoids laying sewer lines within riparian
buffers and avoids installing sewer line stream crossings, where practical. If stream crossings are
necessary, the Town strives to minimize impacts by evaluating options, such as stream boring
instead of above-ground crossings. Directional boring is used to the maximum extent
practicable.
Final location and design is determined during the permitting process.
6.2.6
Water Conservation
As the Town of Cary is responsible for the water and sewer systems for the Town, the Town
of Cary’s water conservation and restriction plans are now followed.
In 1996, the Cary Town Council established a goal to reduce per capita water consumption by 20
percent by 2015. The weather-adjusted trend data indicate that the per capita consumption
values have reduced approximately 24 percent for the single-family residential customer
class since 1996, and approximately 20 percent for the combined residential and non-
residential consumption over the same time period (CH2M HILL and Brown and Caldwell,
2013). Figure 6-2 presents the trend in overall combined residential and non-residential
gallons per capita day since 1995.
The Town of Cary’s Water Conservation Program has a threefold approach to achieving
water conservation by Town residents and businesses—voluntary, regulatory, and incentive
mechanisms. This section provides a summary of the water conservation programs being
implemented by the Town; a comprehensive description of each individual program is in the
Town’s LRWRP (CH2M HILL and Brown and Caldwell, 2013).