02/23/2005 Env Bd Packet - Laserfiche WebLink

Home Search

• • • 5. Rare Species • There are no known rare species of plant or animal known on the site. 6. Greenway Considerations • The Open Space and Greenways Plan shows no proposed linear connections directly associated with the site. The plan does show a proposed City linking trail along Lilac Street(Attachment 9). Site Analysis 1. Surface Water : There are 5 ponds proposed for the site. Pond 1 exists as the smaller pond depicted on the Attachment 4 drawing. Almost all of the water flowing off the site goes to Marshan Lake via County Ditch 10. A small amount of pre- existing water on the North side may go to George Watch Lake. All of the water is proposed to go through ponds connected by pipe to a storm sewer pipe on Apollo Drive. The following suggestions are made: • Grade Plan calls out for ponds to be dug after construction of infrastructure, and than protected from compaction. At least pond 1 should be constructed before construction as part of NPDES program. All of the pond areas should be protected with fence prior to construction to avoid compaction. • Look for additional ways to infiltrate water. Parking lot swales /rain gardens, and perforated pipe connecting ponds are suggestions. • Infiltration ponds should be designed with organic filtration bottoms. • BMP NPDES plan should be submitted and accepted by the city as acceptible. • Water volume calculations are not verified yet. 2. Trees The Tree Preservation Plan is inadequate. It is not indicated on the plan which trees are planned for removal and which trees are planned to be saved. One can assume that the trees would be removed in building and parking lot spaces. The isolated eco -patch of oak woodland would almost be totally eliminated. A few remaining edge trees would be saved. It appears there are two proposed existing -oak island -trees proposed. The size of this island should be large enough to support the trees. At least 1.5 feet of root -zone area should be provided for each inch of tree diameter. All remaining trees proposed must have tree protection fence at the same distance requirement. 3. Landscaping • The Landscape Plan is inadequate.