Once the winter weather ends, Concord General Services’ Highway and Utilities Division begins spring operations for the City of Concord. Fluctuating temperatures from winter to spring can cause roads to shift. Roads easily shift during the spring thaw, which occurs when any frozen ice underneath the asphalt begins to melt. The spring thaw can cause potholes, sink holes, cracks, and road damage. Crews work in the spring to prevent and repair any road damages created during the spring thaw.
Each spring, Concord General Services' Highway and Utilities Division flushes City-owned hydrants to remove any sediment from water distribution pipes to maintain water quality and clarity. This operation also checks for water pressure. Water customers may experience low water pressure and discolored water in their area during hydrant flushing. Residents should avoid doing laundry when flushing is occurring in their area. If discoloration occurs, please run your tap water on cold until the water runs clear.
2017 Hydrant Flushing
Hydrant flushing for the season begins on April 17, 2017 and will continue for several weeks in different areas of the city. Check back here to see our latest flushing schedule to see when hydrant flushing will be in your area.
Week 1 (4/17/17 - 4/21/17) Schedule
Week 2 (4/24/17 - 4/28/17) Schedule
Week 3 (5/1/17 - 5/5/17) Schedule
Load Limit Postings
The City of Concord has lifted spring road load limits as of April 24, 2017. All snow had to be completely melted and all ditches had to be dried up of any standing water before postings could be lifted. These postings were put in place to help protect Concord's streets during the spring thaw. The spring thaw refers to when the temperatures fluctuate and the roads begin to melt any ice frozen underneath the asphalt, typically in areas indicating frost heaves and recent potholes created during the cold winter weather. Heavy weight on roads during the spring thaw can cause cracks and potentially even big breaks in the street. The amount of road damage is directly linked to how often the road is used and the weight of each load, especially if the road does not have a solid foundation. Road damage can naturally occur during frequent thawing and freezing cycles, and heavy weight on weakened roads can cause excess damage. We appreciate all the cooperation to help maintain Concord's roads.
Road Damage and Potholes
Frost heaves occur in the winter when water underneath the road cannot drain through frozen soil. The water freezes and expands upward, thus heaving the road. When the pavement starts to warm up in the spring, the ground thaws and the road contracts back down and creates cracks in the pavement. Cracks weaken the road structure and eventually potholes are formed. Potholes are created from the ground shifting of the freezing and thawing cycles. Highway and Utilities crews repair potholes by cleaning out the debris in the hole and then filling the hole with Cold Patch. The material is then compacted with a tamper or roller.