NC0056561_System Performance Annual Report_20220126

Town of Maggie Valley
System Performance Annual Report
2021
I . General Information
Facility Name - Town of Maggie Valley Sewage System
3987 Soco Road
Maggie Valley, NC 28751
Town of Maggie Valley Wastewater Treatment Plant (WWTP)
5320 Jonathan Creek Road
Waynesville, NC 28785
Contact Information
Town Manager
Nathan Clark
[phone] ext. 103
Public Works Director
Michael Mehaf fey (ORC) WWTP & CS
[phone] ext. 102
Public Works
Seth Boyd Backup (ORC) WWTP & CS
[phone] ext. 102
Permit Numbers:
• NPDES Permit #NC0056561
• Marketing & Distribution Permit #WQ0010615 (Class A Residuals)
• General Storm Water Permit #NCG110104
• Collection System Permit #WQC500122
• EPA Lab Code #NC01414
• North Carolina Lab Code #5171
II. Description of Facilities
A. Collection System
The Town of Maggie Valley's service area covers approximately 15 square miles. The Town provides
service to areas along Jonathan Valley from Fie Top Road to Interstate 40. There are over 46
miles of public sanitary gravity sewer line, one public pump station within the collection system and
approximately 1170 manholes system wide. There is another 4 miles of private sewer system that
drains to the Town's public collection system. The Town's collection system is considered young as
the majority of the lines were completed in 1986. Pipe sizes throughout the collection system
range from 4 inches to 18 inches with the majority (38 miles) being larger pipes 8 inches to 18
inches in size. Pipe materials used within the system include both polyvinyl chloride (PVC) and
ductile iron pipe (DIP) with the majority being PVC. The Town's 2,030 sewer customers reflect a
service population of an estimated 4,670 people.
B. Wastewater Treatment Plant (WWTP)
The present wastewater treatment plant (WWTP) is a 1.0 million gallon per day (MGD) extended
aeration secondary treatment plant serving Maggie Valley and the Jonathan Valley area. Overall
the Town services approximately 2,030 separate sewer customers with a combined customer

population of approximately 4,670. In 2021, the facility treated an average daily flow of 352,000
gallons per day. The plant consists of a step bar -screen with shaftless screw conveyor for
preliminary treatment. 2 - first stage and 2 - second stage aeration basins along with a
rectangular clarifier for secondary treatment. Disinfection is done by injecting chlorine into the
effluent and dechlorination is achieved with sulphur dioxide gas injection. Residuals are held in two
60,000 gallon aerobic digesters until dewatering is completed by a one meter belt filter press.
Dewatered sludge is then stabilized by using the N-VIRO Alkaline Stabilization Process. Part of
the sludge is land -filled. The WWTP produced approximately 200 tons of Dewatered sludge in
2021.
III. Performance Measures
A. Collection System
• The Town of Maggie Valley has an aggressive preventive maintenance program of high pressure
line cleaning and video inspection. This year over 30,800 lineal feet of pipeline was cleaned and
inspected in this way. This represents approximately 13% of the 46 miles of sewer system.
• Public Works completed and submitted to NCDENR-DWQ, during the yearly system inspection,
two six month High Priority Inspection Reports and a System Inspection and Maintenance
Report as required. The High Priority Line report documents inspection of aerial lines, siphons
and lines in proximity to creeks and streams. The System Inspection Report documents
oversight and walking of the entire sewer system and maintenance and repair logs.
• The collection system recorded no reportable sanitary sewer overflow (550) in 2021.
• Town Staff, has completed the majority of the repairs identified during the 2020 Inflow &
Infiltration Study. We see the results of the Study and related repairs showing up as reduced
average Daily flows from the previous year.
B. Wastewater Treatment Plant (WWTP)
• Performance measures were successfully achieved during the 2021 annual reporting period.
The WWTP continues to provide effective/efficient treatment services to the community
averaging BOD, TSS and Ammonia removal efficiencies well above the NCDENR and EPA
requirements. Flow to the WWTP continues to remain well below hydraulic capacity for the
plant, with an average flow of 352,000 gallons per day in 2021. The combination of Inflow &
Infiltration Repairs and rainfall near average, were contributors in significantly reduced
average Daily flows. The WWTP remained in compliance for all permitted parameters and
received a favorable review by NC-DENR Regional Office staff with respect to the annual
facility inspections.
IV. Certification
I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users and
customers of the Town of Maggie Valley sewer system and that those users have been notified
of its availability.
Michael Mehaffey, ORC/U O
Public Works Director
Town of Maggie Valley Sewage System
Date