07/26/2000 Env Bd Packet - Laserfiche WebLink

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• • ENVIRONMENTAL BOARD MEETING MAY 31, 2000 Mr. Johnson commented on the natural water table in this area and impact caused by the construction of the road, deep sanitary sewer, and other projects. He advised that all of the ponds are in nonhydric soils and are dry because of the low water table level. Trehus asked about the suggestion of staff to connect Pond 1 to the other side of Apollo Drive. Mr. Johnson stated Pond 2 is on the south side of Apollo Drive and the proposal is to divert water from the freeway culvert to the west into Pond 2 until it is at an elevation to outflow into the culvert under Apollo Drive. Staff's proposal is to connect Pond 1 with Pond 2 via a pipe under Apollo Drive. Mach asked if there is an opportunity to install a cattail wetland to act as a filter to Marshan Lake. Asleson stated he understands the desire for a vegetated filter strip but he does not think there is an opportunity to do so. Mr. Johnson stated this site is a long way (three - quarters to one mile) upstream from that point and he doe . now what is available from Lake Drive to Marshan Lake to provide additi trea sent. Also, the area is very flat. Mach advised of a different project that successfully filter. Acting Chair Lanyon asked the members to addres ents via a vegetative Donlin suggested plantings that do not uire e' nsive watering such as prairie stock and oak trees. Davidson noted that resident o visual year -round screen. Asleson stated a plan can be presented to t . - en hat area including the option of a vegetation buffer with a wooded t r` ^ uatio as well as prairie vegetation. He suggested oak trees planted in laye O'Connell as ! if a be .. vegetation would better block sounds. Mr. Johnson stated he does not kn ._ • "` uses will be but the City has previously indicated the uses on that edge must b om atible with the residential homes to the west. He agreed that landscaping will vide a better visual buffer a story and a half off the ground than a berm would provide. Acting Chair Lanyon asked why there is a need to do anything on the berm at this point. Mr. Johnson stated they now have the opportunity to obtain fill material at a lower cost. Because of that, they would like the ability to accept that fill material and stockpile it until it is needed. Acting Chair Lanyon stated that depending on what is built, a berm may be better or a vegetative screen may be better. Until it is known what is being built, that decision can be delayed. 5