CCP 08-21-2000 - Laserfiche WebLink

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The merits of a drainage subbase along the Ingerson Road "hill" east ofPernwood Street were discussed since hills generally shed water very well as opposed to flatter profiles and therefor have less need for subdrainage. Although these points are true, the monetary savings would be approximately $25.00/per foot of roadway (IO% of roadway cost), differential settling at the transition from sand subbase to no subbase would likely cause a dip or bump in the roadway in that area and a lower level of performanee would still be expected from the non subbase roadway over the long run. Staff recommends that a drainage subbase be included throughout Ingerson Road. e Street Width Harnline A venue and Ingerson Road: 30 feet face to face of curb. (local collector) Carlton Drive, Cannon Avenue and Pernwood Street: 28 feet face to face of eurb. (local) Ingerson Court and Pernwood Court: 24 feet face to face of curb. (special case) Either driveway aprons or concrete valley gutters are proposed for Pernwood Court and Ingerson Court to help delineate these two minor cul-de-sacs from Ingerson Road. Hamline A venue Closure Staff recommends that Harnline A venue be closed and removed between Ingerson Road and Tiller Lane. The cost to reconstruct this segment of roadway would be much greater than the e average for the neighborhood and may cause some encroachment into the adjacent wetland if widened to 28-32 feet. Virtually no assessable properties lie on this segment of roadway raising the city cost of the project. The traffic movements provided by the roadway could be replaced by Dunlap Street and Pernwood Street. Traffic on those two streets will increase, the test performed earlier this summer indicated an ADT increase on Dunlap Street from IOO to 300 however, an ADT of 300 is still considered typical for a residential type street. A moderate speed increase was also measured during the test apparently as a result of the closure however speeds generally stayed below 30 mph. The project would include reconstructed curves and landscaping as necessary at the Hamline A venue and Ingerson Road intersection and at the Tiller Lane and Cannon Avenue intersection to present a smooth, finished design and not have the closure appear as an afterthought. A pedestrian/bicycle trail should be included between Ingerson Road and Tiller Lane in the general area of Hamline A venue however the trail could meander to highlight any regrading, ponding or stream construction which may occur in the area. Water Quality Improvements A. Pernwood Channel Staff recommends that some permanent ponding be created in the Pcrnwood Channel in order to improve the water quality of runoff entering Lake Josephine. The existing picnic area on the west side of the channel should essentially remain intact. Some of the edges of the channel . should be extended to the east in a serpentine nature to create the additional volume. A weir