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<br />. Environmental Aspects - Both materials cite the use of waste byproducts in their <br />manufacture. Concrete often incorporates fly ash. Asphalt can employ the use of roofing <br />shingles. <br /> <br />. Maintenance Aspects - If areas on concrete streets begin to fail they still need to be <br />patched or replaced. Bituminous patches to concrete streets result in bad aesthetics and <br />rideability. Replacing concrete panels is more expensive and could result in a patchwork <br />appearance of varying color. Underground repairs on bituminous roads could be <br />completed and open to traffic the same day. Concrete pavements usually require larger <br />removal areas to accommodate the repair to underground utilities, and the curing time of <br />the patch requires a longer inconvenience for the traveling public. <br /> <br />Recommendation: <br /> <br />Staff concurs with pavement experts that there is no clear cut answer to the question of which <br />material is better. Each material offers of number of advantages and disadvantages enumerated <br />above. A case could be made for either material depending on construction time frame, expected <br />life span, traffic loads and volumes, and initial construction budgets. Staff recommends <br />_ remaining vigilant for opportunities to utilize concrete as an alternate bid whenever market <br />conditions between the two materials are competitive. <br /> <br />Action: <br /> <br />This item is for informational purposes and discussion. <br /> <br />Reviewed By: <br /> <br />City Engineer <br />Director of Public Works / Principal City Engineer <br />Street Superintendant <br />,,, <br />PW:08/)f'/09 <br />