nathan davis steven reid kristen ulmer graduate assistant: nathan dye
TRANSCRIPT
Nathan DavisSteven ReidKristen UlmerGraduate Assistant: Nathan Dye
PROJECT
N
Design a stormwater drainage system for the city of Bluffdale
•Assess current infrastructure
•Assess current drainage needs for a 100 year 24 hour storm
•Design of new infrastructure using EPA SWMM
•Prepare a cost estimate
EXISTING INFRASTRUCTUREMap of Existing Inlets and Pipe LocationsMap of Existing Inlets and Pipe Locations
EXISTING INFRASTRUCTURE• 3 Drains in Neighborhood
• 1 drain has no pipe exit• 2 drains empty into trench
9 Drains on Northern Street• Pipes over to Bangeter
Highway system
ANALYSIS OF DRAINAGE NEEDS
STEPS
Create drainage basins for each inlet
Find the depth of the 100 year 24 hour storm
Calculate flow lines and accumulations
Calculate curve number using soil type and land use data
Export information into HEC-HMS
0 5 10 15 20 25 300
0.51
1.52
2.5
Type-II SCS cumu-lative depth curve
Time [hr]
Dep
th [
in]
Map of Drainage Basins
HEC HMSHEC-HMS Model
HEC-HMS Output
EPA SWMM
NodeAverage
Depth (ft)MaximumDepth (ft)
1 0.13 0.72 0.18 0.823 0.2 1.044 0.2 1.045 0.11 0.476 0.08 0.43
Outfall 0.66 0.66
LinkMax Flow
(CFS)Max
Depth (ft)1 2.57 0.282 3.25 0.463 6.23 0.554 7 0.695 3.19 0.326 7.98 0.66
Flow Volume vs. Time in Fullest Pipe
Depth of Water in Pipe vs. Time
Depth of Water and Inlets
Depth and Flow in Pipes
FINAL DESIGN
1
2
3
4
65
1b
6b
5a
2b
2a
1a
4a
3
4b
5b
6a
Final DesignExisting..................
Proposed…………….Pipe Labels…………… Inlet Label……………
FINAL DESIGNPipe ID Surface Upstream Surface Downstream Invert Upstream Invert Downstream Length Grade Pipe Diameter
1 4453 4447 4449.5 4443.5 307.3 2.0% 1.5
2 4447 4446 4443.5 4440.5 612.1 0.5% 1.5
3 4450 4446 4446.5 4440.5 304.4 2.0% 1.5
4 4446 4444 4440.5 4438 238.9 1.0% 1.5
5 4444 4444 4438 4437 152.4 0.7% 1.5
6 4444 4437 4437 4436 20.0 5.0% 1.5
Total Length 1635.0
Inlet ID Surface Elevation Invert Elevation Depth of Pipe1a 4453 4449.5 3.51b 4453 4450 32a 4447 4443.5 3.52b 4447 4444 33 4450 4446.5 3.5
4a 4446 4440.5 5.54b 4446 4441 55a 4444 4438 65b 4444 4438.5 5.56a 4444 4437 76b 4444 4437.5 6.5
Cross Pipes Upstream Invert Downstream Invert Grade1 4450 4449.5 2.1%2 4444 4443.5 2.1%4 4441 4440.5 2.1%5 4438.5 4438 2.1%6 4437.5 4437 2.1%
Pipe elevation and length information
Inlet elevation and box depthsCross Pipe depths
COST ANALYSISITEM QUANTITY UNIT UNIT
COSTITEMCOST
Mobilization 1 LS $ 8,000.00 $ 8,000.00
Furnish and Install 18-inch RCP Pipe 1635 LF $ 52.00 $ 85,020.00
Furnish and Install 15-inch RCP Pipe 152 LF $ 40.00 $ 6,080.00 Manhole 6 EA $ 2,550.00 $ 15,300.00 Inlet 8 EA $ 2,200.00 $ 17,600.00
Roadway Patching 596 SY $ 20.00 $ 11,913.33
Remove Surface Materials (asphalt) 1787 LF $ 9.00 $ 16,083.00
Construction Cost: $ 159,996.33
Construction Contengencies (20%): $ 31,999.27
Engineering Design and Construction Management (15%): $ 23,999.45
Total Cost: $ 215,995.05
Total Cost (Rounded): $ 216,000.00