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Albany
229.883.0332
229.883.0543 FAX
Augusta
706.261.4040
706.261.4042 FAX
Savannah
912.354.4499
Smyrna
770.952.2481
770.955.1064 FAX
info@speng.com
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Overview
Since 1960, Stevenson & Palmer Engineering
has served many municipal, county, private, and industrial clients.
At Stevenson & Palmer Engineering, Inc. we are able to meet
the needs of municipal, industrial, agricultural, and private clients
with solutions for: wastewater, water, stormwater, transportation,
site development, planning, surveying, solid waste, inspection,
funding assistance and many other civil engineering services.
Our areas of service include Environmental, Transportation, Surveying/Mapping,
Governmental Consulting, and Industrial.
Featured Project
The continuous population growth of Coweta County, recurrent droughts,
and the potential shortage of purchased water, necessitated the
County to initiate the project of building the B.T. Brown Water
Treatment Plant (WTP). Stevenson & Palmer Engineering, Inc.
was chosen to provide engineering services for design and construction
administration. This is the County's first water treatment plant.
Previously, the County purchased drinking water from several entities,
primarily the City of Newnan. The new WTP has a design capacity
of 8.0 MGD. It will initially be limited by a withdrawal permitted
rate of 6.0 MGD. The new B.T. Brown WTP will help provide water
to the County's 22,000 customers.
The source of drinking water is the 339 acre B.T. Brown Reservoir
which was a soil conservation service project, constructed in 1984
primarily for the purpose of flood control. Coweta County will
now maintain the reservoir. Another source of water is from Cedar
Creek. The recently revived Coweta County Water & Sewer Authority
will operate the WTP.
The WTP utilizes state-of-the-art controls and instrumentation
for the conventional process design treatment scheme. Raw water
from the reservoir intake is conveyed via triplex pumps with a
peak pumping rate of 9.5 MGD. Chemical addition of up to six different
chemicals is available prior to a static mixer, followed by duplex
4-stage hydraulic flocculation chambers. Duplex sedimentation basins,
employing vacuum suction sludge collectors are provided, followed
by 4 foot 60 degree tube settlers. Four conventional dual-media
filters complete the process treatment. Post-treatment chemical
addition of up to four chemicals is provided prior to the chlorination
contact/finished water clearwell of 2 million gallon capacity.
High service pumps consist of two-10.1 MGD and three-5.0 MGD pumps.
Alum sludge storage ponds and a modern control/laboratory building
complete the facility.
Coweta County is located approximately 35 miles southwest of
Atlanta in the western central portion of the State of Georgia.
The County includes a 443.1 square mile area bounded to the north
by Fulton County. Coweta County is part of the Atlanta Standard
Metropolitan Area, as well as the sixteen (16) county Metropolitan
North Georgia Water Planning District (MNGWPD). The County Seat
is centrally located in the City of Newnan, which is the largest
municipality in the county.
For more information contact Braiden Griffiths at 770-252-8216
Previous Featured Project
In 2004, the existing Northside Wastewater Treatment
Facility in Commerce, GA was expanded from 1.05 MGD to 2.1 MGD
average daily flow. The expansion was necessitated by population
growth, aging equipment, and the need to meet increasing discharge
standards. The original plant was built in 1974 with a design
capacity of 0.7 MGD and upgraded to 1.05 MGD in 1986. The last
addition was a sulfur dioxide dechlorination unit that was added
in 1999. City management and the engineering staff of Stevenson & Palmer
Engineering considered various options for expansions and improvements
at the plant and selected the process design and associated equipment
to provide a cost-effective equipment facility that would meet
all state standards and allow efficient and flexible operation.
The existing bar screen was retained and existing aeration basins
were converted to equalization basins. New equipment includes
a grit removal unit, nitrification/denitrification aeration ditch,
effluent settling tanks (clarifiers), tertiary filters, ultraviolet
disinfection and effluent aeration. Solids handling uses the existing
belt filter press to dewater solids from two new digesters. Dewatered
sludge is landfilled. For more information, contact Bill White
@ 770-952-2481.
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