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2014 Main Street/S. Winooski Drainage Improvements
2014 Main Street/S. Winooski Drainage Improvements
In response to the frequent flooding at the intersection of Main Street and South Winooski Avenue and on South Winooski Avenue south of Main Street and the resultant flooding of businesses in that vicinity, the City of Burlington Department of Public Works initiated a flooding mitigation evaluation in late 2013. Unlike some other areas of the City, where flooding is caused primarily by a lack of capacity in the subsurface pipes, the main mechanism of flooding in this area was determined by DPW Engineering Staff to be primarily the result of an inability of the drains themselves to drain the flow of water coming down the Main Street and South Winooski hills. Essentially, the vessel is big enough, but the opening to the vessel is too small and can also be too easily clogged to keep up with the flow of water.
Since this type of flooding can be mitigated by simpler changes to the number, location and type of storm drains versus wholesale replacement of pipes, the City decided to move forward with a drainage improvement design involving additional storm drains with larger inlet capacity.
Based on this information and strategy, in early 2014 the Department of Public Works engaged our On-Call consultants Aldrich Elliot to undertake a feasibility study and ultimately to produce construction documents.
The final project will involve the addition of 4 new drainage structures on Main Street above the intersection and 2 new drainage structures uphill and downhill of the intersection on S. Winooski Avenue. The new drainage structures will be high capacity inlets, with larger grates and curb inlets.
Consultant: Aldrich + Elliot, PC
Project Schedule: May 12, 2014 - mid June 2014
Project Costs: Engineering: $21,205
Construction Cost estimate: $171,000
Total: $192,205
Funding Sources: Stormwater, Wastewater
Project Documents: Feasibility Study Memo, Feasibility Study Attachments , Construction Plans (revised)
