Water Street Hydrologic and Hydraulic (H&H) Analysis (Drainage Study) Water Street Hydrologic and Hydraulic (H&H) Analysis (Drainage Study) City of Platteville Common 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 Fire Station Location #1 and #2 were modeled separately Purpose was to determine the individual impact from each Purpose was to determine the individual impact from each Modeling indicates neither location will “adversely impact” the Water Street Basin 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 Alternatives

Regrade open channel Regrade open channel Reconstruct junction Reconstruct junction Results in no adverse impacts Results in no adverse impacts Location #1 Alternatives - Scenario 1

Replace open channel with box culvert Replace open channel with box culvert Reconstruct junction Reconstruct junction Results in no adverse impacts Results in no adverse impacts Location #1 Alternatives - Scenario 2

Alternatives – Scenario 3 Location #2 Replace open channel with box culvert Replace open channel with box culvert Results in adverse impacts Results in adverse impacts

Alternatives – Scenario 4 Location #1 Location #2 Construct stormwater pond by high school Construct stormwater pond by high school Results in no adverse impacts 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

A Fire Station at either location will not adversely impact the basin 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 1 will not adversely impact the basin Improvements to Location 2 will 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 If Location 2 is chosen, the stormwater pond must also be constructed The stormwater pond will reduce water surface elevations in the basin 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 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 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 Conveyance improvements will likely require permitting – meet with WDNR staff early during design Recommendations Location #1 Location #2

Questions?