Residential Area 1B & Arterial Zone 7 Rehabilitation Project

OE provided design engineering, construction management, and inspection services to the City of Diamond Bar on the Residential Area 1B & Arterial Zone 7 Rehabilitation Project. The Area 1B and Zone 7 project consisted of 8.9 miles of residential streets, 1.3 miles of collector streets, and 2.5 miles of arterial roadways. For the annual project OE was tasked with providing a design for rehabilitating the streets in a manner that meets the City’s tight budget. Each street was individually inspected to determine the most cost effective remedy. The scope of work entailed 29,000 SY of chip seal, type II slurry seal, 5,235 tons of AC overlay, 210,000 SF of cold milling the existing pavement to a variable-depth of 6’ from the edge of the gutter, removal and replacement of 2,249 tons of AC pavement, adjusting 127 manhole frames and covers, and 147 water & gas valve covers, and installing 6 traffic loop detectors. Furthermore, an elementary school was within the project limits, which made construction scheduling and phasing for both the pavement and striping operations essential in order to provide safety and accessibility during the beginning and end of the school day.