Minutes - Public Works Committee - 05/15/2007

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. The material is not very dense and provides little lateral support for the edge of the pavement which is the weakest pati of the road. City Engineer Jankowski stated in 2004 there was only a small portion of overlay that needed to be shouldered in that year's program and a Class 2 shouldering material was used as an alternative to topsoil on a short segment of Bowers Drive. Class 2 is a dense well graded mixture of aggregate sizes which is similar to Class 5 except that the largest patiicle is % inches in diameter versus 1 inch for Class 5. This Class 2 shouldering aggregate eliminates the negatives outlined with topsoil used as a shoulder material. However, Class 2 generates complaints which include the aesthetic appearance of the aggregate material being less than that of lawn grass, and the presence of loose rock migrating into the lawn and thus being a mowing hazard. Mr. Jankowski stated in the subsequent 2005 year program Class 2 shouldering was used on 7 miles of overlaid roadway adjacent to 253 property owners, and in the 2006 program 8.15 miles of street was overlaid adjacent to 274 property owners. Staff presented pictures illustrating the use of shouldering materials within the past several programs. Mr. Jankowski stated in the 2007 program 4.4 miles of mral streets are scheduled to receive a bituminous overlay adjacent to 149 propeliies. Staff feels that the use of Class 2 material provides a superior shouldering material when compared to the use of topsoil. It is especially valuable at intersection radii where shoulders are particularly difficult to maintain with the use of lighter topsoil. Councilmember Dehen expressed concern in establishing Class 2 as a policy throughout the City. He stated there are a lot of places in the City where the grass is growing fine up to the road edge and it would seem to him that the breaking up of the pavement would be more problematic around corners and intersections. He suggested using the Class 2 where it is needed and allowing the grassy areas up to the road where they work. City Engineer Jankowski explained it becomes difficult to determine where to put the different materials with the number of miles of roadway that need to be addressed throughout the City. The Committee discussed the following in relation to the appearance of the transition area from the new raised grade of the pavement to the adjacent grade: · Maintenance · A policy that would include using different materials based on the condition of the shoulder area and the maintenance that is performed by the landowner. o Problems could include the cost involved going back with a different shouldering material in areas that have already been completed by the contractor. · Homeowner maintenance is required with the black dirt and seed · Staff effort involved in asking every resident whether they would prefer black dirt or Class 2. Councilmember Dehen suggested the homeowner could be provided with information requesting them to notify the City if they would prefer Class 2 with the notification about the paving project. Public Works Committee / May 15, 2007 Page 7 of 11