Agenda - Public Works Committee - 12/18/2007 - No Meeting

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used as the sealcoat cover aggregate on the City's programs. It is the lowest cost cover aggregate. ,Because it not as likely to lie on its most stable side, it tends to be more susceptible to plow damage and being rolled by turning tires which can lead to tracking complaints. Crushed aggregate on the other hand becomes embedded on its flattest side and is less prone to stripping and tracking. Staffproposes using crushed granite in the 2008 program. Another proposed modification will be to use a polymer modified asphalt emulsion on cuI de sacs. The cost of is anticipated to be 20% higher than the CRS 2 oil which has been used in the past and will continue to be used on the remainder of the streets. CuI de sacs experience a great number of turning vehicles and are the sites of most areas of aggregate loss of our programmed streets. The polymer creates a strong electrical bond between the oil and the aggregate which greatly increases the adherence of the chip to the street surface A citizen informational meeting will be held again this year to answer questions regarding the program and also to identify any additional improvements that should be made in advance of the street maintenance work. Staff will use this as an opportunity to hear from local residents of any issues which could best be remedied prior to the street work taking place, as well as to answer questions regarding the program and its process. Recommendation: Staff recommends that the committee direct staff to prepare a feasibility study for the 2008 Street Maintenance Program for review at the January 15,2008 Public Works Committee meeting. Action: Motion to recommend that the City Council direct staff to prepare a feasibility study for the 2008 Street Maintenance Program for review at the January 15, 2008 Public Works Committee meeting. Reviewed by: Director of Public Works/Principal City Engineer Street Maintenance Supervisor PW: 12/18/07 28