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.3 City of Mounds View Staff Report Planning Case No.477-97:D.W.Jones Property May 24, 1997 Page 2 on the resolution related to the general concept plan first(Resolution No. 5127)and then take action on the change to the zoning map(Ordinance No. 599). Resolution No. 5127 is attached to this report, which covers the issues from the April 28 meeting. Ordinance No. 599 is attached to the staff report on the rezoning ordinance. At the April 28 meeting, City Council directed the applicants to provide additional information pertaining to certain issues as follows: • Redelineation of the wetland • Further review of the site impact traffic analysis • Analysis of drainage calculations and on-site ponding • Explore feasibility of underground parking at senior complex • Review of site plan by professional urban designer Discussion: Redelineation of the wetland; encroachment into the wetland buffer: The wetland on the site has been redelineated as shown on the revised site plan dated May 22, 1997. The new delineation indicates that the wetland area has decreased in size since the last delineation was done in 1992. As a result,the extent to which the uses encroach into the 100 foot wetland buffer decreases from and estimated 45 percent to 40 percent along the northwest and northeast • side of the wetland where development is concentrated. There is no encroachment from this development in the buffer area along the south side of the wetland. There is also more room on site for the placement and expansion of NURP ponds as a result of the new delineation. Further review of the site impact traffic analysis: Staff arranged to have traffic engineers at SEH review the traffic analysis prepared by Biko Associates for the applicants. Glen Van Wormer and John Hagen from SEH responded with their comments in a memorandum dated May 9, 1997 (attached). The original traffic study labeled the driveways as shown in the attached site plan. Their concerns with Biko Associates' traffic analysis were focused on: • traffic volume attributed to driveway"D • stacking on Silver Lake Road • absence of a.m. peak period analysis for driveways "A"and"B" • conflict points between traffic movements on the site SEH calculated volumes for the driveway D access point which were significantly different from those of BikoAssociates. The stacking of vehicles northbound on Silver Lake Road at peak periods could block access to driveway D, making it difficult for vehicles southbound on Silver Lake Road to gain access at driveway D. Bill Smith of Biko Associates responded to SEH's concerns in a memo dated May 15, 1997 (attached). Mr. Smith provided revised traffic volumes for driveway D, additional documentation concerning stacking on Silver Lake Road, explained that both MnDOT and the County had determined that a.m. peak period traffic analysis would not be needed, and presented further information regarding on-site circulation. • SEH reviewed Biko Associates' response to its concerns and offered conclusions in a memo dated May 20, 1997 (attached).