Four Mile Creek Tributary Wastewater Improvements Project


Project phase


 Project updates

The Four Mile Creek Tributary Wastewater Improvement Project includes the replacement of approximately 3,800 linear feet (LF) of 16, 15, and 8-inch diameter gravity sewer and 22 manholes.  A portion of the pipe was identified as being capacity limited as a result of flow monitoring. This capacity limitation along with increased development in the area necessitated the upsizing of this sanitary sewer to an undetermined size that will be finalized during the design of this project. Flow monitoring of this segment of gravity sewer indicates that there is a significant amount of inflow and infiltration (I/I) coming from upstream sources in the collection system. Efforts to identify and reduce sources of I/I will be performed in the upstream basin.  

The replacement portion of this project is located along a tributary to Four Mile Creek that stretches from north of Weddington Road to the inner loop of Interstate (I-) 485 in Matthews. The sub-basin to be investigated for sources of I/I is located between Weddington Road on the west, the outer loop of I-485 on the north, Pleasant Plains Road on the east, and McKee Road on the south in Matthews.

Estimated Schedule

Phase                                    Date

Real Estate                             Complete
Bid                                          Complete
Construction                         January 2019- January 2020
Warranty Inspection            January 2021

  • Clearing – trees, shrubs, bushes, and other vegetation inside the construction easement before installing the wastewater pipe. When and where possible, trees on the edge of the easement are preserved.
  • Pipe delivery and storage – Pipes, manholes, and other materials are delivered and stored within the construction easements and road right-of-ways.
  • Establishing a safe work zone – Fencing will be put in place and pipe will be stabilized to prevent it from moving.
  • Construction traffic (excavators, dump trucks) along the creek, within the easements or road right-of-way. Interstate 485 and Weddington Road will be open during the project. Bumble Bee Drive will be temporarily reduced to one lane during pipe installation
  • Trench digging (five-feet to more than twenty-feet deep)
  • Customers may feel a rumble
    • Crews may remove rock formations by use of small blasting.
    • Areas along the alignment where blasting is required will be determined shortly after site clearing.
    • Residents within a 500-foot radius of the blasting sites will be contacted. Blasting is a standard construction procedure and all safety precautions will be taken.
    • Residents may hear a warning horn and feel a slight vibration or rumble similar to a slammed door or thunder.
    • Blasting will be conducted Monday through Friday after 9:00 a.m. and before 5:00 p.m. as needed during construction.

Project Documents

The area serviced by this gravity sewer is experiencing a high rate of infill development and the existing gravity sewer cannot accommodate projected growth. A new pipe is required to serve customers.​

​Properties that will be directly affected by construction will be contacted to discuss easement agreements. Areas near construction will be notified before construction. ​

$2.64 million​


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