HomeMy Public PortalAbout13-pumping-stnRevised 12/15/2014 122
13. SEWAGE PUMPING STATIONS
13.010 General
A sanitary sewage pump station will only be considered where a thorough study of all alternatives clearly indicates a gravity
collection and disposal system is not practical or feasible. The minimum size of a pump station dedicated to the District shall
have an average daily flow rate influent of 6 gallons per minute (GPM) or greater. In residential terms, this is 20 homes or
more. Where the construction of a sanitary sewage pump station is being considered, the current guidelines regarding plan
review procedures, construction drawing preparation, easements, specifications and acceptance will be provided by the
District in a document called Pump Station Design Requirements (PSDR). Reasonable variances to the PSDR may be
granted by the District. Variance requests must be made in writing and must clearly state why the variance is necessary. A
brief summary of the plan review procedure is described below:
13.020 Pump Station Plan Review Procedure
The following material must be submitted to the District Engineering Department for review.
13.020.01 Design Report
1. The Pump Station Design Report shall be typed and bound in 8½ inch by 11
inch booklet form.
2. The following information shall be included in the report:
a. Title page
b. Sewer system information
c. Pump station and force main design calculations
d. Cycle times/Detention Pipe Design Calculations
e. Summary of results from design calculations
f. Manufacturer's specifications for the mechanical and electrical
components
g. Pump performance curves
13.020.02 Design Drawings
1. The design drawings shall be individual 24 Inch by 36 Inch Design Plan
Sheets
2. The following information shall be included on the drawings:
a. Cover sheet
b. General site plan (Scale 1” = 50’)
c. Pump station site plan (Scale 1/4 inch = 1 foot)
d. Force main plan and profile (Scale 1” = 10’ vertical, 1” – 50’
horizontal?)
e. Gravity sewer plan and profiles with elevations for the building
lateral and the lowest finished floor connection indicated
f. Pump station structure sheet (Scale ½ inch = 1 foot)
g. Pump station mechanical sheet (Scale 1” = 1 foot)
f. Electrical plans and details
h. Miscellaneous details (service panels, alarm towers, etc.)
i. Pump station design requirements
(*Note-Thrust Blocks are no longer required since change to certain approved mechanical joint restraints.)
Revised 12/15/2014 123
13.020.03 Required Submittal
For any project utilizing a pump station, three (3) additional sets of plans and a total of four (4) sets of pump station
design report must be submitted to the Engineering Department. Refer to Section 1.040.02 of this manual for further
information. Incomplete sets will not be reviewed by Engineering or the Pump Station Division and shall be returned to
the Engineer with a request for missing material.
13.030 Low Pressure Sewer Systems (LPSS)
13.030.01 General
A sanitary sewage low pressure sewer system will only be considered where a thorough study of all alternatives clearly
indicates a gravity collection and disposal system or a sewage pump station is not practical or feasible. This will include
developments requiring pumping but fall below the 6 GPM average daily flow rate. Where the construction of a sanitary low
pressure sewer system is being considered, the current guidelines regarding plan review procedures, construction drawing
preparation, easements, specifications and acceptance will be provided by the District in a document called Low Pressure
Sewer System Design Requirements. Additional protection of the existing downstream gravity system (e.g. coatings, linings)
and odor control/treatment facilities may also be required. A brief summary of the plan review procedure is described below.
13.030.02 LPSS Plan Review Procedure
The following material must be submitted to the District Engineering Department for review:
1. Low Pressure Sewer System Design Report:
a. The Low Pressure Sewer System Design Report shall be typed and bound in 8-1/2” x 11” booklet
form.
b. The following information shall be included in the report:
(1) Title page
(2) Sewer system information
(3) Pump station and force main design calculations
(4) Downstream pump station detention pipe design calculations
(5) Summary of results from design calculations
(6) Pump performance curves
2. Design Drawings:
a. The design drawings shall be individual 24” x 36” design plan sheets
b. The following information shall be included on the drawings:
(1) Cover sheet
(2) General site plan
(3) Force main plan and profile
(4) Miscellaneous details
13.030.03 Required Submittal
For any project utilizing a low pressure sewer system, three (3) additional sets of plans and a
total of four (4) sets of the low pressure sewer system design report must be submitted to the
Engineering Department. Refer to Section 1.040.02 of this manual for further information.
Incomplete sets will not be reviewed by Engineering or the Pump Station Division and shall be
returned to the Engineer with a request for missing material.