1 March 1997
2-4. PUMPING STATION SITE SELECTION. The location of pumping facilities within a service
area will be based primarily on topographic considerations and the need to provide for future
development. Pump stations will be located so that all points within the intended service area
can be drained adequately by gravity sewers. Any planned development within the service area,
such as construction of new buildings or modifications to existing ones, or any projected shifts in
population and/or workforce will be considered. This type of information is generally obtained
from the installation master plans, or from personnel staffing requirements. It is a relatively
simple matter to design a pumping station with capacity for future development by providing
room for additional or larger pumps, motors, impellers, etc. However, the physical location of the
station is more critical since it cannot be moved to accommodate new buildings or population
increases. The following general guidelines for site selection and location of pumping stations
will be used:
-Pumping facilities will not be constructed beneath buildings, streets, roadways, railroads,
aircraft aprons or runways, or other major surface structures, to the maximum extent practical.
-Pump stations will not be located closer than 150 meters (500 feet) to buildings, or other
facilities to be occupied by humans, unless adequate measures are provided for odor and gas
-Pumping stations at wastewater treatment facilities will normally be located, adjacent to, or
in connection with, other plant elements as required for proper functioning of the treatment
-The location of pumping stations will be made with proper consideration given to the
availability of required utilities such as electric power, potable water, fire protection, gas, steam,
and telephone service.
2-5. PUMPING STATION BUILDING AND SITE REQUIREMENTS.
a. Floor and building elevations. The invert elevations of incoming sewers will determine the
depths of underground portions (substructure) of the pumping station. It is common practice to
set the maximum liquid level in the wet well equal to the 80-90 percent flow depth of the lowest
incoming sewer. Subsurface and soil conditions at the site will dictate the structural design,
excavation depths, and top of footing elevations required for the foundation. Surface conditions
such as adjacent buildings and site grading will determine the elevations of floors above ground
(superstructure), except that the elevation of the ground floor will be set above the maximum
expected flood level.
b. Architectural and landscaping. For pumping stations located in built-up areas, the
architectural exterior of the buildings should be made similar to or compatible with, surrounding
buildings. When the station is located in a remote area, building appearance is not important,
but the possibility of future development in the vicinity will be considered. Pump stations and
facilities will be provided with fencing where necessary to prevent vandalism, and to protect
people from hazardous contact with electrical transformers and switching equipment.
Landscaping should be considered in built-up areas, and will be required in residential
communities. Where stations must be constructed in close proximity to residences or other
quarters, buffer zones of planted shrubbery should be provided for noise reduction.
c. Access. All pump stations will be readily accessible from an improved road. For stations
that are not enclosed, access will be provided for direct maintenance from a truck equipped with