Haley and Ward, Inc.
Civil and Environmental Engineers
WEST STREET WATER SUPPLY
BOARD OF WATER COMMISSIONERS
GEORGETOWN, MASSACHUSETTS
The American Council of Engineering Companies of Massachusetts has awarded the Georgetown Board of Water Commissioners and Haley and Ward their 2002 Small Firm Award for Engineering Excellence. The project, West Street Water Supply, involved the construction of an access road, water main, bridge, well and pump station and a water treatment plant off West Street in the Town of Georgetown, Massachusetts.
While
the Georgetown Water Department
controls several hundred acres in
the area of the West Street Water Supply project; land area available for the
project development was somewhat limited. The
proposed pump station site, access road and bridge were all located in a
protected wildlife habitat area. The
Parker River, bordering wetlands and the adjacent uplands are excellent habitat
for two species of special concern: the Spotted Turtle and the Wood Turtle
Haley
and Ward designed the project to
follow a historical cart path across the
river at an existing ford.
The roadway width was minimized to limit impact but
also provide unrestricted year round access to the pump station site.
The bridge over the Parker River was designed to reduce on-site work
effort. The pump station foundation
includes concrete wing walls to eliminate wetland filling while keeping all the
station floor and equipment above the 100-year flood plain.
While the treatment plant construction
was completed partially within the habitat area, the restrictions here related
to the adjacent recreational
uses. In the
years prior to the
site development, the Board of Water Commissioners had allowed the local soccer
league to develop recreational fields. Today,
the fields are used extensively throughout the warm weather season.
The Board was initially concerned that a treatment plant would need this
upland area for backwash wastewater treatment.
The owner was hesitant to eliminate the available recreational field
space. Haley and Ward’s design of a backwash water reuse system
reduced the land area required for treatment lagoons by 90%. The reduced land requirement could be obtained within the
project site without the loss of any of the recreational fields.
Use of the fields continued throughout the construction process and the
site remains very active today.
Limited screening was maintained
between the road and the treatment plant
structure
to break up the size of the facility while also allowing visual inspection for
security reasons. The front
elevation has a red brick veneer; the side elevations are concrete block with
brick pilasters used to break up the mass of the 100 by 40 foot structure.
The net result of the building design was an attractive front façade as
the primary focus of the building. The
building developed a historical appearance that blended in well with the rural
neighborhood. The overall
construction was relatively economical. For
the cost of split block construction, the owner constructed a building that
created interest and was well accepted by the local residents.
The south facing elevation of the treatment plant
includes a 16-foot square
insulated glass roll up door. The
door provides passive solar heating of the concrete floor within the treatment
plant process area. The door also
provides visual access to the process area from the street.
The large treatment filters are visible through the door. This feature opens the treatment process to the public to
instill confidence in the water supply
|
Key
Project Components |
|
|
Water
source |
Gravel
pack well, approved rate 1048 gallons per minute |
|
Transmission
main |
1000
linear feet, 12” ductile iron mechanical joint main |
|
Bridge |
12-foot
span, precast deck with precast block abutment and approach at preexisting
ford |
|
Access
roadway |
1000
linear feet gravel base road constructed on historical cart path.
Paved access road at plant |
|
Water
Treatment Plant |
2.5
MGD greensand pressure filtration facility, lime feed for corrosion
control and chlorine disinfection |
|
Backwash
Reuse System |
Gravity
treatment train, 85,000-gallon reuse storage tank, variable rate booster
pump station, dual 65,000 gallon settling lagoons. |
|
Project Participants |
|
| Engineer: Planning, Design, Construction, Startup | Haley and Ward, Inc. |
| General Contractor: Roadway/Pipeline/Bridge | Busby Construction Inc. |
| General Contractor: Pump Station | Puma Construction Co. |
| General Contractor: Treatment Plant | Waterline Industries Corp. |
| Major Equipment Supplier | Tonka Equipment Company |