Description: B-3652 - GUILFORD COUNTY Location: Bridge #20 on SR 4121 over Deep River.
Item(s) of Interest:
3 span(65'-85'-65') Type IV girder bridge with 4' f drilled piers.
Electrical conduit and other utility issues.
On-site temporary detour bridge.
Permit mistakenly stated that detour bridge would span the river so temporary bents were not allowed to be placed in the river. Post-let, a need for maintaining pedestrian traffic was identified.
New bridge will have a closed drainage system.
Used standard overhang falsework plans.
Drop inlet in the approach slab.
"Floating" grade point.
Observations and Points of Discussion:
This site utilized a rock causeway for construction access, but the temporary detour bridge was required to span the stream.
All Units were encouraged to promote awareness of such errors among their staff and the regulatory agency staff.
There was some general discussion on the costs of on-site detours, with this site being cited as an example because of the requirement to span the stream and to provide a pedestrian walkway by supplemental agreement. There was consensus to include verbiage, in the planning documents, permit applications, and contract, that will avoid similar issues in the future.
Temporary bridge had a pedestrian walkway, which the city requested for access to a nearby park.
ACTION ITEM(S):
Structure Design will discuss the importance of carefully reviewing and discussing permits with their staff.
NC DOT
NC DOH
NC GOV
