City chipseals West Colorado Avenue from interstate to 31st StreetAfter several weeks of pavement patching, a city-contracted crew laid a quarter- inch overlay of chipseal on West Colorado Avenue between I-25 and 31st Street. The work took place in the daytime June 7-8, as well as the night of the 8th.
The mixture of tiny rocks and oil represented the city's first curb-to-curb resurfacing along that 2½-mile stretch since a full milling and repaving in August and September of 2007.
Scalfri also clarified that the new surface will eventually be striped as it was before. In Old Colorado City, a number of merchants have urged two-laning and diagonal parking, but the city has yet to approve such a plan.
A common criticism of chipsealing is that some rocks can get loose and fly around when cars drive over them. Public Works deals with this problem through the added step of “fogsealing” the mix after it's applied to preserve the oil and bind the rocks in. This was done on West Colorado, Scalfri said.
Chipseal is typically about a fifth the cost of pavement.
Scalfri said no time frame has been established for the Colorado Avenue chipseal longevity. But he described the rocks that were used as a “very hard aggregrate” from Pueblo that's a byproduct of steel slag. “We will monitor the performance,” he added.
The pavement-patching that went before the chipseal involved filling potholes and repairing or repaving the pavement as needed.
Under established city policy, Colorado Avenue qualified for chipsealing at this time because its pavement is no more than a decade old and is holding up well.
In the past, city street officials have estimated that chipsealing can add five to seven years to the life of adequate pavement.
A Westside example is South 26th Street, which had chipseal applied over what was then 8-to-10-year-old pavement in 2005. Twelve years later, that surface has not shown serious deterioration. It is slated for a full milling/repaving this summer under the city's 2C “road tax” program.
Westside Pioneer article