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Davidson Mesa Parking Lot Surface Alternatives <br />Material <br />Cost <br />Pros <br />Cons <br />Concrete <br />Install: $125,000 <br />$12 /sq. ft. <br />Maint: $400 per year <br />• Life Span 30+ years <br />• Lower heat island effect than asphalt alternative <br />• Lowest maintenance of all alternatives <br />• Will sustain higher volume of traffic without causing <br />maintenance impacts <br />• Will match existing sidewalk <br />• Can be plowed <br />• Aesthetically "Park Like" <br />• High color contrast compared to natural environment <br />• Will crack due to freeze /thaw cycles caused by expansive soils <br />(may require sectional replacement) <br />•Most expensive installation cost of all alternatives <br />Asphalt <br />Install: $61,500 <br />$6.00 /sq. ft. <br />Maint: $500 per year <br />• Life span 20 years (with routine maintenance) <br />• Can be patched if needed <br />• Matches Harper Lake Parking Lot <br />• Connects into existing asphalt pad at entrance <br />• Can be plowed <br />• Aesthetically "Park Like" <br />• Softens in summer heat <br />• Highest heat island effect of all alternatives <br />• Crack sealing first year to increase life span <br />Asphalt <br />Millings <br />Install: $35,000 <br />Maint: $500 per year <br />• Environmentally Friendly (Recycled Asphalt) <br />• May be able to get millings for free from local projects <br />to reduce installation costs to $23,000 <br />• Aesthetically "Park like" <br />• Frequent maintenance for potholes and ruts <br />• Can not be plowed <br />Soil <br />Stabilizer <br />(Applied to <br />Aggregate) <br />Install: $25,000 <br />$2 /sq. ft. <br />Maint: $500 -1000 per <br />year <br />• Aesthetically "Open Space Like" <br />• Can purchase spray tank /setup to apply future top <br />coating <br />• Will reduce dust and frequency of potholes and ruts <br />• Environmentally Friendly (pine tar emulsion) <br />• Stabilizer can also can be used on trails for erosion <br />reduction on steep slopes and corners <br />• Top coat application 2 time per year requires 2 day closure <br />• Cannot be plowed <br />• Maintenance of potholes and ruts <br />• <br />Aggregate <br />Install: Complete <br />Maint: $500 per year <br />• Aesthetically "Open Space Like" <br />• Consistent with Open Space values due to natural <br />materials and permeability <br />• Material colors blends in with the natural environment <br />• Frequent maintenance of potholes and ruts <br />• Closures twice per year for full re -grade (2 days per closure) <br />• Tracking of materials onto the street can be problematic <br />• Cannot be plowed <br />• Closures due to inclement weather may be necessary to reduce <br />maintenance concerns <br />