HomeMy WebLinkAboutApplication Files_82693_pg0442 ® Vanacce Hangen R�ctlin, Inc
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Proposed Conditions
Summary
The project will include four 53,290 square-foot studio production buildings,a 29,375
square-foot mill building,paved parking for 576±vehicles(including two porous
pavement parking areas),site access drives,secured entrance gates,landscape areas,
and a paved backlot staging area. The stormwater management system design was
guided by the 2004 Connecticut Stormwater Quality Manual.Existing grading and
drainage patterns were maintained to the maximum extent possible.Low impact
development(LID)stormwater management techniques were incorporated into the
design.These practices are focused at decentralizing stormwater management at the
Site and incorporating many smaller stormwater management techniques into the
design that will reduce peak runoff rates,maximizing groundwater recharge and
treating for water quality.
Under proposed conditions,the majority of stormwater runoff from the studio and
mill buildings,backlot staging area,and perimeter parking fields will flow overland
to deep sump catch basins and into a closed pipe network.This network will
discharge into Stormtech®infiltration chambers,where all storms up to and
' including the 100-year event will infiltrate. Runoff from abutting properties will be
conveyed to biofiltration basins or an infiltration basin with a sediment forebay. An
emergency overflow connection to the existing 48-inch culvert under John Fitch
1 Boulevard will be provided from the Stormtech®system if allowed by CTDOT. The
48-inch culvert will safely convey stormwater from storms exceeding the 100-year
event to the Podunk River. In addition to the Stormtech®infiltration system,several
LID components were incorporated into the design. These include two porous
pavement parking lots,numerous biofiltration basins,infiltration basins,and water
quality and vegetated swales to treat runoff from a portion of the major access drive.
Other water quality and quantity control measures include pavement
sweeping/vacuuming,and sediment traps/forebays.The stormwater management
system was designed to protect the surrounding natural resources from potential
' stormwater runoff impacts. (See Figure 3 in Appendix A).
Details of the stormwater water management system features are provided on the
following pages.
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