Bright alleys

摘要

The combined city and county of Denver is saving time and money by using its own forces to cold-mill and resurface 1,100 alleys in a dedicated four-year program. The result is a substantial reduction in the backlog of alley work, improved cash flow for other street maintenance projects and thousands of satisfied citizens whose crumbling alleys are transformed in days from a patchwork pavement to milled surface to fresh hot-mix asphalt (HMA) pavement. "In Denver we have about 5,000 alleys total, of different lengths," said Dan Roberts, director, Street Maintenance Division, Department of Public Works for the combined city and county of Denver. "Some are of different configurations ― some L-shaped, some T-shaped ― but all are about a block in length." Of those 5,000 alleys, half are concrete surfaced and in good shape. But about 1,400 of these alleys are a century old, or older, constructed of port-land cement concrete and overlaid in the 950s or 1960s with HMA.