Hobbs, Upchurch & Associates has participated
in the planning, design, and construction of numerous sewer line
extensions, sewer line replacements, and wastewater pump stations.
Following is a brief summary of some of our sewer line and pump
station projects.
 North
Carolina Department of Correction, Anson County, North Carolina
The new station was designed to serve the new prison and two existing
prisons, a total of 2,200 beds. The design required the pump station
to discharge to an existing 6-inch force main, which created significant
high head conditions. The 30 HP pumps in the new station operate in
series at 525 gallons per minute at 200 feet of head. A total of four
pumps were needed to provide the redundancy required by the State.
The existing backup generator is being used to provide standby power
for the new pump station.
Sewer Service to Town of Peachland
Funding acquisition, design, project administration, and construction
inspection for county sewer extension to the Town of Peachland. The
project included an evaluation to determine current and future flows
into the collection system to ensure the long-term needs of the area
would be met. The design included 15,500 linear feet of 10-inch of
gravity sewer, a 240 gpm sewer pump station, and 4,000 linear feet
of 6-inch force main.
Burlington, North Carolina Influent
Pump Station Rehabilitation
Planning, surveying, engineering design, and construction management
for a project to upgrade and modify the existing influent pump station
at the South Burlington Wastewater Treatment Plant. The project included
the replacement of existing 125 HP pumps with new 225 HP variable
frequency drive pumps, as well as the replacement of the original
16-inch suction line and gate valves from the wet well and the 16-inch
check valves and 16-inch discharge gate valves on the pump discharge.
The existing 30 inch header was also recommended for replacement.
New Sewer Collection System, Calypso, North Carolina
HUA helped the Town obtain over $3 million in grant funding from the
North Carolina Rural Center and from the CDBG Infrastructure program.
The project included layout, design, and permitting of a new sewer
collection system to serve the Town of Calypso. The Calypso collection
system will discharge to the wastewater treatment facility in the
Town of Mount Olive. Calypso has experienced significant problems
with failed septic systems caused by poor soil conditions and shallow
water tables. As part of the sewer design HUA evaluated the current
flow conditions and the sewer needs over the 20-year planning horizon.
The new system includes three pump stations , 30,000 linear feet of
gravity sewer lines, and approximately 23,000 linear feet of force
mains. Each of the pump stations will be equipped with an on-site
backup generator. In addition, the primary pump station into the Mount
Olive sewer system will include flow metering for billing purposes.
Camp Lejeune, North Carolina
Replace Pump Station AS629. The new pump station
includes a new cast in place wet well, influent trough with 12-inch
comminutor, a manual bypass bar screen, four 15 HP submersible centrifugal
pumps. The wet well is divided into two sides with two pumps in each
side and isolation slide gates capable of diverting flow to either
side for maintenance on pumps in wet well if necessary. The pump station
is equipped with an on-site standby generator as required by Camp
Lejeune design standards.
Piney Green Road Pump Station
Replacement and Sewer Improvements. Design of 7,000 linear
feet of new 8-inch gravity sewer and a new 180 gpm pump station. The
project eliminated six existing pump stations that were located along
Piney Green Road. The flow from each of the lift stations was combined
to the new lift station completed by HUA. The Piney Green Road Pump
Station was equipped with an on-site backup generator with underground
fuel tank.
STT Area, Pump Station Replacements. Design
of three new wet pit/dry pit pump stations with comminutors to replace
one existing 180 gpm pump station and two existing 320 gpm pump stations.
Each pump station was equipped with a backup generator and underground
fuel tank.
Bldg. 85 Pump Station Replacement. Design
of one new wet pit/dry pit pump station with comminutor to replace
an existing 180 gpm pump station. The new pump station was equipped
with an on-site standby generator with an underground fuel tank.
Hadnot Point, Beach Area, and Rifle Range Force Main. Provided
civil engineering design services for the replacement of force mains
and gravity sewer lines in the Hadnot Point, Beach Area and Rifle
Range Areas of Camp Lejeune. Projects included design of over 128,388
LF of 3 inch to 36 inch sewer line, including pump stations, manholes
and services.
Highway 401 Sewer Project, Hoke County, North Carolina
Design and construction management of a sewer extension project to
serve the Highway 401 business corridor. The project included one
350 gallon per minute above-ground lift station, 4,500 linear feet
of 15-inch gravity sewer, 6,500 LF of 12-inch gravity sewer, and 2,500
LF of 8-inch sewer force main. The project also included valves, piping,
motor control center with heavy duty thermal-magnetic circuit breakers,
magnetic motor starters, radio telemetry, automatic pump controls,
and all related appurtenances in a concrete block structure constructed
over a new 10 foot diameter precast concrete wet well. The project
also included an on-site emergency generator. The lift station was
designed to accommodate business and residential growth in the Highway
401 area. Significant planning and coordination with the North Carolina
Department of Transportation was required, as the project was constructed
within the right-of-way of a road.
Silver City Sewer
Project
Planning, funding, surveying, design, plans, specifications, permitting,
cost estimates, and construction coordination. Hobbs, Upchurch & Associates
worked with Hoke County to obtain approximately $1.1 million in funding
to extend sewer service to the Silver City Community. The community
had significant health problems caused by failing septic systems.
These failures were documented by HUA as part of the preliminary engineering
process. The project is regional in that sewer treatment will be provided
by the City of Raeford. HUA completed the surveying, easement acquisition,
engineering design, permitting, and construction inspection for 20,000
LF of 8 and 12-inch sewer mains to serve 120 low and moderate income
homes.
KCI Pump Station and Force Main Project, Kershaw,
South Carolina
Installation of approximately 34,446 LF of 8 inch force main, 15 LF
of 6 inch force main, approximately 1,016 LF of 8 inch gravity sewer,
five five manholes, upgrading an existing duplex submersible pump
station to 600 gpm, upgrading an second duplex submersible pump station
to 200 gpm, and one new 200 gpm duplex submersible pump station.
Lancaster County Water and Sewer District, South Carolina
Bear Creek Sewer Outfall. Scope consists of approximately
16,500 LF of 15" and 18" gravity sewer outfall, pump station and force
main to service the existing community of Elginwood, several proposed
developments, and projected flows for a 12,000 acre drainage basin.
This project also evaluates two possible scenarios for routing the
discharge to the City of Lancaster's' WWTP based upon capacity of
existing infrastructure and proposed capital improvements of downstream
sewers.
Woodland Hills Sewer Improvements. Design
assistance, permitting and administration of Woodland Hills Sewer
Improvements project for Lancaster Water and Sewer District. Project
included 15,500 LF of 8 inch sanitary sewer, 2,500 LF of 4 inch force
main and 120 GPM pump station.
Inflow and Infiltration
Rehabilitation Project,Lancaster County Water and Sewer District,
South Carolina
This SRF loan will result in approximately 576 LF of dig up and replace
of existing 6 inch sewer with new 6 inch sewer, 3,282 LF of dig up
and replace of existing 8 inch sewer with new 8 inch sewer, 3,485
LF of dig up and replace of existing 10 inch sewer with new 10 inch
sewer, 2,323 LF of dig up and replace of existing 15 inch sewer with
new 15 inch sewer, 65 LF of dig up and replace of existing 18 inch
sewer with new 18 inch sewer, 27 - 4 inch sewer service reconnections
2 manholes, miscellaneous street repairs, 4,311 LF of 8 inch sewer
to be internally reconstructed with Cured-In-Place methods, 923 LF
of 10 inch sewer to be internally reconstructed with Cured-In-Place
methods, 498 LF of 15 inch sewer to be internally reconstructed with
Cured-In-Place methods, sewer service reconnections, manhole inserts.
Rehabilitation of Pump Station No. 1, Lumberton, North Carolina
HUA completed the preliminary evaluation, design, and construction
management for the upgrade to the City's primary sewer lift station.
The station pumps 15 MGD and is located next to the Lumber River in
the center of the City. The Public Works Staff has experienced problems
with overflows and near-overflows during rainfall and flood events.
Significant complications arose during the flooding that resulted
from Hurricane Floyd. HUA worked with the Town to obtain project funding
through FEMA and through the Clean Water Management Trust Fund.
The three original end suction centrifugal pumps were replaced with
two new 6,700 gpm, 50 hp submersible pumps. The project required the
construction of a new wet well and coordination with the contractor
to ensure the existing station remained in service during construction.
In addition, the design had to incorporate the existing electrical
service and the existing on-site backup generator. The project also
included the installation of guide rails, piping, valves, pump controls,
across the line motor starters, level sensing, disconnects, conduit,
power wiring, and control wiring. The contract required the removal
of existing pumps, piping, valves, electrical controls, etc. as necessary
to perform a complete installation. The contract also included the
provision of bypass pumping necessary to maintain the pump station
in operation while the pump replacement was ongoing.
Monroe,
North Carolina, Various Pump Station and Annexation Projects
Rocky River Road Annexation. Design of 12,909 linear
feet of 12-inch and 8-inch gravity sewer, 58 manholes, 8,847 linear
feet of 6-inch PVC force main and 180 gpm pump station to serve Rocky
River Road annexation area. The project included an on-site backup
generator for standby power.
Highway 200 and Highway
601 Annexation Project. The design of 12,000 linear feet of
12-inch and 8-inch gravity sewer along with a 340 gpm pump station
to serve the newly annexed project area. This project also included
the design of 8, 000 linear feet of 6-inch PVC water main. The pump
station included a standby power generator.
Monroe
Airport Industrial Park. Analysis, design and construction
administration of the sewer infrastructure to serve the proposed park.
Analysis included coordination of purchase of 8,000 linear feet of
12-inch gravity sewer from the County and upgrade of an existing pump
station. Design included 8,000 linear feet of 8-inch force main and
a 30 HP duplex submersible pump station. The project included design
of an on-site generator for standby power.
Steel Street
Sewer Main. Design of 234 LF of 16 inch, 2,618 LF of 12 inch
and 1,354 LF of 8 inch sanitary sewer mains and 20 manholes to serve
Steel Street, Secrest Shortcut, and Outfall "H" Sewer Extensions.
Mt. Gilead, North Carolina, Miscellaneous Pump Station Projects
WWTP Effluent Pump Station. Design and construction
services related to 1.5 mgd effluent pump station and 3 miles of 12
inch force main as portion of wastewater treatment plant project.
Highway 109 Pump Station. Design and construction
management of sanitary sewer improvements to serve Highway 109 target
area. Project included 100 gpm pump station, gravity collection lines
and 4-inch force main. The pump station was equipped with on-site
standby power.
Highland School Sewer. Designed
and managed construction of sanitary sewer improvements to serve Highland
School area. Project included 200 gpm pump station, gravity collection
lines and 6 inch force main. The pump station included an on-site
emergency power generator.
Homanit USA Sewer. Design
of a 320 gpm Pump Station along with 8,500 linear feet of 8-inch PVC
force main, and 1,200 linear feet of 8-inch gravity sewer to serve
the new Homanit USA fiber board plant. The pump station included an
emergency standby power generator.
Oak Island, North
Carolina, Sewer Service to Business District
HUA worked with the Town to obtain funding through the Clean Water
Bond High-Unit Cost grant program to construct a new sewer collection
system in the downtown business district. The area was severely limited
by poor soil conditions and failed septic systems. The project included
the design of 13,000 linear feet of 15 inch, 12 inch, and 8 inch gravity
sewer to serve the business district of Oak Island. This project included
one 320 gpm pump station and one 180 gpm pump station along with 10,000
linear feet of 8 inch and 6 inch sewer force main. Both pump stations
included backup power generators.
COMTech Pump Station
and Force Main, Pembroke, North Carolina
Project involves the construction of sewer mains and above-ground
pump stations to serve the Carolina Commerce and Technology Center
(COMTech). COMTech will be a high-tech, professional, commercial and
light industrial business park southeast of the Town of Pembroke on
Highway 711. HUA worked with the Town to obtain over $1.8 million
in grant funding from the North Carolina Rural Center, the CWB Industrial
Development Fund, and the Economic Development Agency to help fund
the project. The project includes 2, 200 LF of 15 inch gravity sewer,
17,200 LF of 12 inch gravity sewer, 2,200 LF of 6 inch force main,
and 5,900 LF of 4 inch force main. The project also includes the construction
of three new pump stations and the upgrade of one existing submersible
pump station.
Southern Pines, North Carolina
HUA has completed the design, permitting, and construction management
for multiple sewer system projects in Southern Pines. The following
summarizes some of the projects completed.
Maples Pump
Station Replacement and Force Main. The existing Maples Pump
Station was an old pneumatic ejector type, enclosed in a below ground
steel structure. The existing steel structure had deteriorated and
the structural integrity was of concern. Also, the existing equipment
was old and worn and the ability to find replacement parts hampered
routine maintenance. The station was replaced with a new concrete
wet well and submersible non-clog sewage pumps. This station was equipped
with a separate valve vault for easy maintenance. The project also
included 67 linear feet of new 6-inch PVC force main to tie into an
existing 6-inch force main, 34 linear feet of new 8-inch PVC sanitary
sewer main, and one new doghouse manhole to connect to the new wet
well.
Ridgeview Pump Station Replacement. The
original Ridgeview pump station pump station was equipped with pneumatic
ejector type pumps. The station was in poor condition and required
replacement. HUA completed the design and construction management
for the replacement project. The new pump station included a new wet
well and 180 gallon per minute submersible grinder sewage pumps. The
project also included new sewer force main to complete connections
into the collection system. The old pump station was demolished and
removed as part of the construction project.
Elks Club
Pump Station and Force Main. The existing Elks Club Pump Station
originally included an old concrete wet well with submersible pumps
and a dilapidated above-ground structure. The original pump station
was replaced with a new concrete below wet well and 180 gallon per
minute submersible sewage pumps. The project also included 750 linear
feet of new 6-inch PVC force main and 80 linear feet of 12 inch steel
casing bored under CSX Railroad. The new 6-inch force main ties into
existing 8-inch gravity sewer. Approximately 800 linear feet of new
8 inch PVC sanitary sewer main and 4 new manhole were required to
connect to the new wet well.
New Sewer Collection System,
Stem, North Carolina
Hobbs, Upchurch completed a preliminary study to document failed septic
systems and contaminated groundwater supply wells in Stem, North Carolina.
The study helped obtain $2.8 million in grant funding from the North
Carolina Rural Center for the construction of a new sewer collection
system in the Town of Stem. The Stem collection system will discharge
to the sewer system in the Town of Butner for treatment. The project
includes surveying, design, grant management, and construction management
for five new pump stations, 18,000 linear feet of gravity sewer, and
over 26,000 linear feet of sewer force main.
New Sewer
Collection System, Wagram, North Carolina
HUA helped the Town of Wagram obtain $3,000,000 in grant funding
through the Rural Center Unsewered Communities program for the construction
of a public sanitary sewer system. The engineering design required
evaluations of current conditions, as well as evaluations of future
sewer needs over the 20-year planning horizon. The project includes
39,000 linear feet of 8-inch, 10-inch and 12-inch gravity sewer,
three sewer pump stations, and 15,000 linear feet of 6-inch PVC
and DIP force main. Two of the three pump stations include 5 HP,
180 gallon per minute, above-ground pumps. The third pump station
has a higher head requiring 7.5 HP, 180 gallon per minute pumps.
All of the pump stations are equipped with backup power generators.
The Wagram sewer collection system discharges to a regional wastewater
treatment facility at the Laurinburg-Maxton Airport Commission.
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