water street hydrologic and hydraulic (h&h) analysis (drainage study) water street hydrologic...
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Existing ConditionsTRANSCRIPT
Water Street Hydrologic and Hydraulic (H&H) Analysis
(Drainage Study)
City of PlattevilleCommon Council
Presented by:Caroline Burger, P.E.
Theran Jacobson, E.I.T.AECOM
Madison, WI
Outline Existing Conditions Fire Station Impacts Alternatives Cost Estimates Conclusions Recommendations
Existing Conditions
Fire Station Location #1 and #2 were modeled separately
Purpose was to determine the individual impact from each
Modeling indicates neither location will “adversely impact” the Water Street Basin
“Adversely impact” means increasing water surface elevations
Fire Station Impacts
Location #1
Location #2
1. Regrade Open Channel
2. Replace Open Channel with Box Culvert
3. Construct Stormwater Pond
4. Combination of 1 - 3
Alternatives
Regrade open channel
Reconstruct junction Results in no adverse
impacts
Location #1
Alternatives - Scenario 1
Replace open channel with box culvert
Reconstruct junction Results in no adverse
impacts
Location #1
Alternatives - Scenario 2
Alternatives – Scenario 3
Location #2
Replace open channel with box culvert
Results in adverse impacts
Alternatives – Scenario 4
Location #1
Location #2
Construct stormwater pond by high school
Results in no adverse impacts
Alternatives – Scenarios 5-7
Location #1
Location #2
Scenario 5: Combination of Open Channel at Location 1 and pond
Scenario 6: Combination of Box Culvert at Location 1 and pond
Scenario 7: Combination of Box Culvert at Location 2 and pond
All result in no adverse impacts
Cost Estimates
Location #1
Location #2
Scenario Capital Cost ($)
1 $174,000
2 $311,000
3 $300,000
4 $203,000
5 $377,000
6 $514,000
7 $503,000
A Fire Station at either location will not adversely impact the basin
Improvements to Location 1 will not adversely impact the basin
Improvements to Location 2 will adversely impact the basin
If Location 2 is chosen, the stormwater pond must also be constructed
The stormwater pond will reduce water surface elevations in the basin
Conclusions
Location #1
Location #2
Proceed with the selection of the Fire Station location
The junction box downstream of location 1 and the sanitary main adjacent to location 1 should be addressed
Conveyance improvements will likely require permitting – meet with WDNR staff early during design
Recommendations
Location #1
Location #2
Questions?