At present this parcel is an old apple orchard with 2 single family residences at the south end, trees between them and the orchard, and trees at the north end. The existing residences will be demolished. The post card sent to nearby residents states: “The proposed project is for 16 unit multi-family units. Each ranch style unit has, two bedrooms, its own entry and a single car garage.” Here is the revised proposed site plan.

Thursday, January 31, 2013

Storm water Questions

At the last public meeting citizens asked questions about storm water run off from the site.  The city has specific requirements for commercial development but uses the County requirements for multi-family residential development.  

Jack Eaton contacted the County Water Resources Commissioner, Evan Pratt, and asked what the County storm water requirements were.   Jack reported he was told:
To manage both water quantity and quality basins must be designed to capture  . . . the 100 year storm event 
The developer proposed drawings state the area of the development is 115,000 sq ft.  A 100 yr storm event in Ann Arbor is usually considered to be 4.75 inches in a 24 hour period.  That amount, 4.75 inches over 115,000 sq ft is about 45,500 cubic ft of water.

But in the report by developers of their recent meeting with neighborhood citizens the developer states:
The developer is responsible for storm water management for the entire 2.64 acres. . ....The storm water detention system holds approximately 20,000 cf of water in pipes that are 72” in diameter.
We need to ask why there is such a large difference and if the County and the Planning Commission intend to accept the developers calculation.
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