Spring Creek Basin Rehabilitation

 LOCATION: Morristown, Tennessee

 KEY PERSONNEL:

• Taylor Hagood
• Steve Bostic

 DATES: 2011-2014

 CONSTRUCTION COST: $11 Million

 PROJECT HIGHLIGHTS:

• TDEC Driven Project
• Phased Basin Construction
• High Flow Conditions
• Residential and Commercial Coordination
• High Traffic Work Area

The City of Morristown is currently under a TDEC Order.  LDA is providing program management and design services to the City.  The City of Morristown is made up of multiple sewersheds totaling 1.3 million feet of pipe and 28 pump stations.  As part of our program management services, the system was divided into 28 unique sewersheds flowing to a single pump station, as well as 4 gravity sewersheds which are conveyed via interceptor to the treatment plant.  Following a hydraulic model assessment, the basins were prioritized by need and LDA commenced design on the basins.  LDA first provided a full range of engineering services including:

• Field Investigations and Surveying
• Hydraulic Modeling
• CCTV Review
• Design
• Bidding Assistance
• Contract Administration
• GIS Development

The first priority project was the Spring Creek basin, which accounted for almost 1/3 of the City’s wastewater system.  The rehabilitation techniques used in the sewershed included slip lining with HDPE pipe, pipe bursting, cured-in-place,“dig and lay” replacement, and manhole rehabilitation.  The Spring Creek rehabilitation was phased into multiple projects to expedite construction, and the basin was split into three different “sub-basins” with construction beginning on the upper two basins first.  The final basin was constructed last, when flow monitoring data could be processed from the first two rehabilitation projects.  By phasing construction in this way, the City was able to more accurately size the rehabilitation efforts in the remaining section.