TM 5-814-2/AFM 88-11, Vol. 2
CHAPTER 7
PUMP STATION COMPONENTS
collection of wash down, seepage, and stuffing box
7-1.
Construction requirements
leakage. These wastes will be piped or conveyed to the
a. Station configuration. The space requirements
wet well, either by gravity or by sump pump. Openings
of pumps, piping and equipment, along with the storage
to the wet well and dry well through the main floor of the
volume required in the wet well, will be carefully
station will be above the maximum flood level, or will
determined so that the proper size, shape and
otherwise be protected from flooding.
configuration of the pumping station can be selected.
c. Materials of construction. Large to medium
The size and shape of the station will often be dictated
sized, conventional type stations will ordinarily be
by equipment other than pumps, such as bar screens,
constructed of reinforced concrete. The above ground
comminutors, grit collectors, etc. Rectangular or square
portion of the building may be of masonry, wood or
structures normally have more usable interior space
metal panel construction.
The requirements of
than circular ones, and will be employed whenever
Department of Defense (DOD) Construction Criteria
possible in the design of medium to large sized pumping
Manual 4270.1-M will be followed in designing for fire
facilities. However, where the below ground portion of
resistive structures. Small package type stations will
the station must be made deep to accommodate
generally be manufactured of steel or fiberglass, with
incoming sewers, and where foundation conditions are
separate wet wells constructed of precast concrete or
poor, circular caisson type structures will be required if
fiberglass manhole sections. Where steel structures are
lateral earth pressures are excessively high. Factory
used, cathodic protection or appropriate corrosion
assembled or package type stations will generally be
control measures will be provided for the underground
circular in design, and will be anchored to base slabs
steel shell in conformance with TM 5-811-4 or AFM 88-
where warranted by subsurface conditions.
Pump
45. Alternatively, steel structures may be protected by a
stations located in cold regions or in seismic zones will
concrete or gunite coating where proof can be furnished
require special design considerations.
by the manufacturer of satisfactory design life. All
b. Designing for operation and maintenance. The
structures will be designed to withstand flotation.
design of medium to large sized, conventional type
d. Personnel safety. Guards will be placed on and
pumping facilities will include adequate floor openings,
around all equipment where operators may come in
doorways, or access hatches for the installation,
contact with moving parts. Railings will be required
removal, and replacement of the largest items of
around all floor openings, and along platforms or
equipment. Interior dimensions in the dry well will
walkways, where there is a danger that personnel may
provide a minimum clearance of 4 feet between
fall. Warning signs will be placed at all hazardous
adjacent pump casings, and a minimum of 3 feet from
locations. Rubber mats will be provided in front of all
each outboard pump to the closest wall. Other major
electrical equipment where the potential exists for
items of equipment will be provided similar spacing. A
electrical shock. Adequate lighting and ventilation will
7-foot minimum clearance between floor and overhead
be provided as required in paragraphs 7-2 and 7-3. In
piping will be maintained where practicable. Smaller
attended stations where the possibility exists for toxic,
package type stations will be furnished with necessary
explosive, or otherwise hazardous atmospheres, proper
access openings for removal of pumps and equipment,
design for personnel safety will be in conformance with
however interior dimensions and clearances will
chapter 19 of TM 5-814-3/AFM 88-11, Vol. 3. Design
generally be less than for field erected stations. Wet
for fire protection will be in accordance with DOD
wells for medium to large sized stations will be divided
Manual 4270.1-M and TM 5-812-1.
Wastewater
into two or more compartments to facilitate cleaning and
pumping stations will be classified as light hazard,
repairs. Wet wells for all stations will have no length,
industrial type occupancies.
width or diameter smaller than 4 feet. Eye bolts or
trolley beams will be provided in smaller stations, and
overhead bridge cranes in large stations, for hoisting
7-2.
Heating and ventilation
a. Heating.
All pumping stations subject to
and removing equipment from mountings. Stairs will be
provided in medium to large sized stations so that
possible freezing will be supplied with automatically
personnel may inspect and maintain equipment.
controlled heaters in the equipment areas. For
Smaller stations, except those utilizing submersible
pumps, will require the use of vertical safety ladders. A
suitable means will be provided to service and maintain
all equipment. A floor drainage system will be provided
in the dry well, and throughout the superstructure, for
7-1
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