Replacement of N. Carlin Springs Road Bridge over George Mason Dr. Approximate schedule with phases and proposed Maintenance of Travel (MOT) plans February 2017
Project Elements Removal of existing bridge span over George Mason Drive Construction of new bridge with four travel lanes, bike lanes, wider sidewalks, jointless deck, higher clearance and refurbished bridge abutments Installation of new sanitary sewer line under N. Abingdon Street and Carlin Springs Road Site restoration & enhancement
5 25.5 4 25.5 5 Existing Centerline Existing Cross Section 65 Wide 8 5 11 10.5 10.5 11 5 8 Final Centerline Planned Cross Section 69 Wide
New Bridge s Design
Projected Schedule Spring 2017 Advertisement for contractor bids on project Summer 2017 Award of contract Fall 2017 Construction begins Winter 2018/19 Construction complete Summer 2019 Landscape restoration
Permitted work times Most work in the roadway will take place during weekdays between 9:00 AM and 4:00 PM Work outside of the roadway can begin at 7:00 AM on weekdays If needed, work may take place on weekends or overnight (but only with special permission) to address significant tasks that must be expedited. There will be two periods of total roadway closures; each is anticipated to be five days or less in duration. County will work with contractor to expedite. Vehicle and pedestrian access to/from adjacent properties will be maintained at all times
Phases of Bridge Replacement Phase 1 The center median and existing southern span (currently northbound lanes) are removed. A temporary edge barrier is installed. Approximate duration is one month. Phase 2 All vehicle & pedestrian traffic is shifted to northern span (currently southbound lanes). There will be one travel lane per direction plus the existing sidewalk. New southern span is built. Approximate duration is 6 months. Phase 3- After new southern span is built, all traffic is shifted to it. Again one travel lane per direction plus a temporary walkway. Existing northern span is removed. New northern span is built. Approximate duration is 6 months. Phase 4 After the northern span is built the two halves are joined. All four vehicular traffic lanes are restored. Temporary sidewalks and barriers are replaced by permanent sidewalks and railings. Approximate duration is 2 months.
Phase 1 Work & Maintenance of Traffic Set up work site Removal of roadway median; existing bridge is split into two parallel bridge spans. A temporary barrier is installed between the spans. Southern span (northbound lanes) is removed. During median removal, traffic is reduced to one lane per direction When south span is removed, all traffic on Carlin Springs and George Mason must be rerouted via detours (up to five days duration)
Detours - Used for up to 5 days during Phases 1 and 3
Phase 2 Work & Maintenance of Traffic Construction of new south side bridge section All traffic (vehicles and pedestrians) is shifted to the north span
Phase 3 Work & Maintenance of Traffic Removal of existing north side span Construction of new north side bridge span Construction of new sewer line in Carlin Springs Rd and Abingdon Street. All traffic (vehicles and pedestrians) is shifted onto the new south side span. When north span is removed, all traffic on Carlin Springs & George Mason Drive must be rerouted via detours (up to five days duration) Abington Street within sewer line construction zone is reduced to one lane (Northbound only)
Sewer Line Construction
Phase 4 Work & Maintenance of Traffic Refurbishment of bridge abutments and wing walls Completion of permanent sidewalks on new bridge Vehicular traffic on Carlin Springs Road will be returned to two lanes per direction across bridge Pedestrian traffic will be restored as permanent sidewalks are completed
Completion Removal of construction trailer, temporary signage and building materials Restoration of site and planting of new landscaping No impacts on traffic movement (vehicles or pedestrians)
Expected Construction Concerns Noise & dust from demolition and construction Cut-through traffic as a result of short-term lane closures and traffic detours Potential traffic congestion from lane reductions & detours during construction Some access restriction on N. Abingdon Street Pedestrian crossings of N. Carlin Springs Road at N. Wakefield and N. Edison streets Rerouting or disruptions to Metrobus Route 25 service
Landscaping Tree Removal & Replacement
Community Preconstruction Meeting to be held in late summer or early fall Community members to meet with Contractor and key County staff Will provide more details about schedules, detours and process Civic associations and all nearby properties will receive invites Updates to be provided on County s project webpage Date and location TBD Web page: www.arlingtonva.us/projects/carlin-springs-road-bridge/
Contacts: Web page: www.arlingtonva.us/projects/carlin-springs-road-bridge/ Bridge Engineer Ravinder Singh, 703 228-3661, rksingh@arlingtonva.us Sanitary Sewer Engineer Jaime Rojas, 703-3675 jrojas@arlingtonva.us Project Manager Richard Viola, 703 228-3699, rviola@arlingtonva.us
Details of Maintenance of Traffic (MOT) Phases
MOT Phase 1- Full Closure with Detours
MOT Phase 2 Travel on North Side Only
MOT Phase 3 Travel on South Side Only
MOT Phase 4 Completion of Sidewalks