10/26/2005 Env Bd Packet - Laserfiche WebLink

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• Agenda Item 5B • Environmental Board Meeting Date: October 26, 2005 Topic: Preliminary Site Plan Review/ YMCA/The Village No. 3 Background: An EAW review of the Legacy at Woods Edge was completed and accepted in 2003. The YMCA site is located at the SE corner of the round -about and bordering the Rice Creek Regional Park (Attachment 16). Analysis: Pervious /Impervious / %Open Space All calculations for pervious, impervious, %open space was calculated for the project as a whole and within the context of the Environmental Assessment Worksheet, the Surface Water management plan, and permit requirements of the RCWD. Please note there is a proposed park area in the NE corner of the project. It is not labeled as such, but it is located in the square area immediately East of the Northern most parking lot. Surface water SEH will be reviewing the YMCA site for conformance to the previously reviewed and accepted plan. As part of the plan (but not shown on the plan), it is noteworthy to point out there will be two Stormwater /infiltration tanks located under the parking lot West of the building. Directly over these chambers there are two islands. These islands are shown with trees landscaped in them. It is possible to design these two islands as depressional to capture additional water draining the parking lot. I would recommend this change be looked at and a designed rain garden be installed should these islands become depressional. It is not recommended to plant trees directly over these Stormwater collection tanks. Landscape Infiltration areas should be constructed using low soil- compaction equipment. Any turf areas should be thoroughly tilled after top soil is spread. Tilling should be as deep as possible into the subsoil. Verification of this cultural practice should be done by the Environmental Coordinator. Some escrow should be held on to for this work. There are several suggested changes to the proposed landscape plant material pallet. I highly recommend changing some of the Autumn Blaze Maples to Northern Pin Oak. The Pin oaks will give the same appearance of bright fall color and are indigenous natives. Unless the YMCA is committed to a very rigorous pruning schedule with the Autumn Blaze there could be an expected loss of some of these trees 10 years down the road due to storm and wind