Laserfiche WebLink
P.W. CASE: <br /> <br /> Standards Revision for Residential Streets <br />By: Brian E. Olson, Principal City Engineer <br /> <br />Background: <br /> <br />Over the past few years, new subdivisions were constructed with 2 V2 inches of <br />bituminous over 4 inches of gravel (Class 5). The bituminous that is used in this type of <br />section is similar to that which is used for driveways. It has much finer particles or <br />aggregate and tends to give the road a finished look. <br /> <br />Within the past year, the City Council formed a policy to require construction to be <br />staged such that a building permit could not be received unless there was a Class 5 or <br />gravel base installed. It also required that bituminous be installed before a certificate of <br />occupancy is received. Whereas this ensures continuous access for public safety <br />concerns, it presents a challenge to Developer's when it comes to construction staging. <br /> <br />Additionally, according to recommendation from our soil engineer, a 7 ton design would be 3 <br />inches of bituminous. Since bituminous should not be installed less than 1 V2 inches and since <br />the first layer of bituminous could be left over the winter, Staff recommends that the current <br />section in all new subdivisions within the MUSA be constructed with a minimum of 4 inches of <br />gravel, 2 inches of bituminous binder course, and 1 V2 inches of bituminous wear course. <br /> <br />This section has the following advantages: <br />· Mom flexibility for the construction project <br />· Ensures continuous access for police and fire activities <br />· Ensures a stable roadway over the winter months <br />· Allows the final layer of bituminous to be installed after the majority of the construction <br /> activity is complete <br /> <br />And the following disadvantages:" <br />· More construction cost ($25/LF compared to $20/LF) <br /> <br />Committee Action: <br /> <br />Motion to recommend to the <br />residential streets to 4 inches <br />bituminous wear course. <br /> <br />City Council to change the residential standards for <br />of Class, 2 inches of bituminous binder and 1 V2 of <br /> <br />Reviewed by: <br /> <br />Public Works Director/Fire Chief <br />City Administrator <br /> <br />PW: 2/18/03 <br /> <br /> <br />