07-23-2014 Council Agenda - Laserfiche WebLink

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-Elf141I1% CE ASSOCIATES TftU lioam Memo TO: Honorable Mayor & City Council Members FROM: Lee Elfering, City Engineer DATE: July 18, 2014 RE: Noel Drive Sidewalk As indicated in the memo regarding the Water Tower valve and hydrant there will be impacts to the existing walls as part of that work. As such we are requesting pricing from the wall Contractor that will be on-site for relocation of the upper wall and modification of the lower wall to accommodate the sidewalk. There are two variables affecting the necessary wall work that we would like Council input on. The first is the location of the north tie in and the second is the maximum grade for the sidewalk. North Tie In Location The attached exhibit shows some possible sidewalk routes and connection points. At a minimum the sidewalk should be extended to the Gervais Mill Park parking lot. However it is likely if the trail ends at the parking lot that sidewalk users would utilize the street to access the trail on the west side of the creek instead of going through the park. Therefore, it may be better to extend the sidewalk along Noel Drive to the bituminous trail on the west side of Gervais Creek. However extending the sidewalk to the trail would require removal or modification of the planting area just west of the parking lot. Sidewalk Grade In most cases we typically try to design all pedestrian facilities to current ADA standards, which among other things require sidewalks to be installed at a maximum longitudinal grade of 5%. With that being said there are sidewalks and trails in town that do not meet that maximum grade standard due to what the existing topography and conditions would allow. An example of that is the bituminous trail north of Little Canada Road just east of McMenemy that goes down to Fire Fighters Trail. That section of trail was constructed at 10%. Modifications will be needed to the walls at the north end to allow a more gradual slope into the parking lot and we would recommend a grade between 5-8%. Based a quick review we would estimate it would cost approximately $5,000 more in wall modifications to obtain a 5% grade verses an 8% grade. 10062 Flanders Court NE — Blaine, MN 55449 — Ph: (763) 780-0450 Fax (763) 780-0452 Memo.071814-CC (Noel Sidewalk)