City of Waynesboro - Route 340 (Main Street) Bridge Replacement
Project at a Glance
Estimate $9.4 million
Lengths and Limits
Length: 0.25-mile. From: Intersection of Arch Avenue. To: Intersection of Charlotte Avenue
Keith N. Harrop, P.E.
The project is located along Route 340 Main Street which is classified as an urban minor arterial (GS-6) primary road in the City of Waynesboro. This section of urban roadway services commercial, industrial, recreational, governmental, and residential properties. In 2009, the traffic count taken on Route 340 showed an average daily traffic (ADT) count of 6,295 leading to predictions indicating that in the design year 2038 the ADT will be 8,300 vehicles per day.
The width of the approach roadway to the Route 340 Bridge is predominately 40-feet of paved surface. The existing bridge, built in 1934, has two thru lanes with a center left turn lane. On both sides of the roadway are 8-foot wide sidewalks. The overall structural width of the concrete bridge deck is 58-feet from out to out of the parapet walls. The superstructure is comprised of four steel multi-beam girder spans each measuring approximately 55-feet adding up for a total bridge length of 224-feet. The concrete substructure is comprised of two gravity abutments and three solid piers all built on timber pile foundations.
When originally constructed, the bridge had six street lights mounted on the parapet railings which have since been removed. Attached to the existing superstructure is a Columbia Gas line and a large number of Ntelos communication conduits. Within close proximity to the existing bridge substructure, a City of Waynesboro potable underground water line crosses the South River. There are also overhead utility lines, fire hydrants, power, and sewer lines in close proximity to the bridge approaches that may also be affected during construction.
The existing Route 340 superstructure was constructed with a pin and hanger system which is no longer considered a desirable design feature. Recent inspection reports have rated the existing bridge substructure as a four out of nine possible, due to deterioration in abutments and piers. The structure is posted at 15-tons and is Structurally Deficient. The current Sufficiency Rating of the bridge is 49.8 out of 99 possible. Total replacement is considered likely as opposed to rehabilitation. The condition of the existing bridge qualifies the structure as a candidate for federal funds for replacement.
The Route 340 approaches will be improved to included 6-foot wide bicycle lanes on either side of the two, 12-foot paved vehicular travel lanes. Pedestrian access will improve as the gaps in the approach sidewalks will be eliminated and replaced with continuous 6-foot wide sidewalks in both directions.
The new bridge alignment will closely match the existing. The transverse cross section will be comprised of 36-foot clear curb-to-curb width, 6-foot sidewalks on each side and bike/pedestrian parapet railings for an estimated total 51-foot, 2-inch width out-to-out.
VDOT Staunton District Traffic Engineering conducted a review of operations at the three-way intersection between Route 340 and East Avenue. Following the recommendations in that report, the existing left turn lane servicing eastbound Route 340 traffic turning north onto East Avenue will be eliminated.
The existing Route 340 and McElroy Street intersection and left turn lane will be relocated approximately 200-feet west of its current location. The new alignment will be renamed Race Avenue and will entail 700-feet of new pavement for two, 12-foot wide vehicular lanes with an 8-foot wide graded shoulder to the east and curb and gutter to the west. This re-alignment will improve the open-space conditions in Constitution Park.
The primary purpose of the reconfiguration of the East Avenue and McElroy Street approach intersections is the elimination of turn lanes on the proposed bridge.
The existing McElroy Street pavement width will be removed and reclaimed as green space allowing for future park development by the City of Waynesboro.
Currently Route 340 Main Street has a posted 25 mph speed limit. VDOT road design guidelines indicate that the design speed on an urban arterial road other than a freeway in a central business district should be no less than 30 mph. The characteristics of this section of Route 340 support 30 mph as an appropriate design speed.
Current standards for a GS-6 roadway with a design speed of 30 mph call for a 300-foot minimum horizontal curvature radius. Along the existing Route 340 centerline, the curve located on the eastern bank at the intersection with East Avenue does not meet this threshold. This location is constrained by the commercial buildings located on either side of the road. However, this section of roadway is 50-feet wide from curb to curb when only 36-feet of width is required for the conditions. As a cost effective measure, the proposed centerline and edge lines through this curve will be repainted to standard within the confines of the existing curb and gutter. This approach will also reduce impacts to the commercial buildings along the alignment.
The City has commented that, “aesthetic features are important to the City because the bridge is located essentially as a gateway to our downtown and is adjacent to one of our major parks.” Specifically, design consideration will be given to the use of form-lined/stamped concrete architectural features on parapet walls, exposed areas of the substructure, and sidewalks. New bridge and approach lighting will compliment the architectural lighting installed in the downtown area. Additional consideration will be given to the substructure, landscape and streetscape around the bridge approaches and park areas, special location specific signage and lighting beneath the new bridge.
This project replaces an existing substandard, structurally deficient bridge on a state primary route that serves residents of the City of Waynesboro. If not replaced the existing bridge will continue to deteriorate and would eventually have to be closed to vehicular and pedestrian traffic. Unless a replacement construction contract is awarded, the inevitable closure of the existing structure would inconvenience local residents, disadvantage area business and adversely affect traffic flow through downtown Waynesboro.
The bridge will be closed during construction and traffic will be detoured (less than 1-mile) to the adjacent Route 250 Broad Street Bridge with minimal impact to area industrial and commercial interests. Affected school bus routes will require additional coordination.
Traffic alerts can also be found on the VDOT website under Travel Center, Travel advisories and lane closures. Click on the area of the state you are interested in, and view current travel advisories and lane closures. Click here to go to the Staunton District Travel Center page: Staunton District
Real-time traffic information is available on the VDOT 511Virginia.org website and also by calling 511 on your landline or wireless phone. Click here to go to 511: Virginia 511 Web
State Project: 0340-136-330,P101, R201, C501, B611
Federal Project: BR-5136(118), BR-5136(119), BR-5136(120)