HomeMy WebLinkAbout004_Sewer ReportProject:
Prepared By:WGM Group/LRC
Reviewed By:WGM Group/GDF
Date:
Description:
11
0
2.11
2
23
4.37
150
0.72
108
89
1.51
91 gallons/hour
6.60
396 gallons/hour
0.01
*
**Based on City of Bozeman Design Standards and Specifications Policy
***
W:\Projects\210902\Computations\[Water Demand Calculations - 05.16.22.xls]Wastewater Demand Calculations
Peak Wastewater Flow Rate
Peaking Factor Calculation
Wastewater Demand Calculation
gpd
Assumed Infiltration Rate**
Lot Area
Number of Residential Dwellings (Dus)
Number of People Per Residential Dwelling
gal/day/person
gpmAverage Wastewater Flow Rate***
Average Wastewater Flow Rate
gpmPeak Wastewater Flow Rate
5/16/2022
West Beall Townhomes: The sewer stub that runs toward the lot is 6" vitrified clay per City GIS. The existing manhole in Beall is
12.85' to the invert in. The sewer main extending out of this manhole to the north is 8" vitrified clay.
people
DU
gallons/acre/day
Acres
Population
Peaking Factor*
21-09-02
Image 1: Bozeman Infrastructure Viewer
Number of commercial Dwellings (Dus)
Number of People Per Commercial Dwelling
DU
persons/DU**
persons/DU**
Infiltration Rate
Wastewater Generation Rate
Peak Wastewater Flow Rate cfs
WGM Group, Inc.
5/23/2022 2:48 PM
Project Description
Friction Method Manning Formula
Solve For Discharge
Input Data
Roughness Coefficient 0.013
Channel Slope 0.40000 %
Normal Depth 6.00 in
Diameter 8.00 in
Results
Discharge 0.70 ft³/s
Flow Area 0.28 ft²
Wetted Perimeter 1.40 ft
Hydraulic Radius 2.41 in
Top Width 0.58 ft
Critical Depth 4.73 in
Percent Full 75.0 %
Critical Slope 0.00773 ft/ft
Velocity 2.48 ft/s
Velocity Head 0.10 ft
Specific Energy 0.60 ft
Froude Number 0.63
Maximum Discharge 0.82 ft³/s
Discharge Full 0.76 ft³/s
Slope Full 0.00333 ft/ft
Flow Type SubCritical
GVF Input Data
Downstream Depth 0.00 in
Length 0.00 ft
Number Of Steps 0
GVF Output Data
Upstream Depth 0.00 in
Profile Description
Profile Headloss 0.00 ft
Average End Depth Over Rise 0.00 %
Normal Depth Over Rise 75.00 %
Downstream Velocity Infinity ft/s
Worksheet for Circular Pipe - 1
11/4/2021 11:04:12 AM
Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03]
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of1Page
GVF Output Data
Upstream Velocity Infinity ft/s
Normal Depth 6.00 in
Critical Depth 4.73 in
Channel Slope 0.40000 %
Critical Slope 0.00773 ft/ft
Worksheet for Circular Pipe - 1
11/4/2021 11:04:12 AM
Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03]
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of2Page