Sound Beach Avenue Bridge (No. 03954)

Project Update: 

Week of 1/23/23 -- The bridge structure is now complete. Work will continue as weather permits. This week, the contractor will pour concrete for the sidewalk at the southwest corner, and continue with the stone veneer, drainage installation, curbing, and sidewalk on the northwest side. Sidewalk restoration on the east side will take place once Aquarian Water Company completes its water main installation.  A 90-day settlement period is required before the roadway can be repaved.  This will take place in the spring along with the landscape restoration.

The Sound Beach Avenue Bridge is scheduled to be completed in the Winter and landscape restoration is to be completed in the Spring of 2023.  

Significant delays have been the result of necessary utility relocations. 

Potential intermittent traffic is anticipated. Please give yourself a little extra time when traveling, stay vigilant for signage, and obey police directions. For the safety of the workers, stay alert, slow down, and select alternative routes. Pedestrians will be routed through Binney Park during construction. The pedestrian detour will remain in effect until the sidewalks are completed. Follow @GreenwichPublicWorks on social media for updates. 

Pedestrian Detour Route

Pedestrian Detour Route

Anticipated Project Timeline

  • Spring 2023 -- Landscape restoration will be completed.
  • Winter -- Major bridge construction and project completion. 
  • Week of 1/23/23 -- The contractor will pour concrete for the sidewalk at the southwest corner, and continue with the stone veneer, drainage installation, curbing, and sidewalk on the northwest side. Sidewalk restoration on the east side will take place once Aquarian Water Company completes its water main installation. A 90-day settlement period is required before the roadway can be repaved.  This will take place in the spring along with the landscape restoration.
  • Week of 1/9/23 -- The contractor stripped concrete forms, and continued with the stone veneer, drainage installation, curbing, and sidewalk on the west side. Sidewalk restoration on the east side will take place once Aquarian is complete with the water main installation.  A 90-day settlement period is required before the roadway can be repaved.  This will take place in the spring along with the landscape restoration.
  • Week of 1/2/23 -- The bridge structure is now complete. The Town's contractor will continue with the stone veneer and drainage installation as weather permits. Connecticut Natural Gas is completing the installation of the gas main this week. Sidewalk restoration will take place once Aquarion Water Company is complete with its water main installation. A 90-day settlement period is required before the roadway can be repaved.  This will take place in the spring along with the landscape restoration. 
  • Week of 12/26/22 -- Town’s contractor poured the concrete for endwall and continued stone veneer work. At the end of the week, the contractor completed the bridge structure. They will continue with the stone veneer as weather permits. Sidewalk restoration will take place once Aquarian Water Company completes its water main installation.
  • Week of 12/12/22 Frontier Communications encased cables in conduit on the east side of the bridge and Connecticut Natural Gas installed the permanent gas line on the west side. The contractor installed stone veneer on the parapet and endwalls on the east side of the bridge. 
  • Week of 12/5/22 --  The contractor formed the parapets and remaining sections of endwall on the east side. Frontier Communications completed the encasement of the conduits on the south side. Aquarion Water Company commenced the installation of the water main this week. Connecticut Natural Gas completed the gas line switchover.
  • 12/2/22 -- Installation of the bridge membrane waterproofing
  • Week of 11/28 -- Following utility work, the Town's contractor worked on the east side, open stream flow, and strip forms by the end of the next two weeks. The contractor also worked on the installation of dampproofing, backfilling the wingwalls and endwalls, installation of the water main, and preparation for the bridge membrane installation.
  • Week of 11/21/22 -- Frontier Communications encased their conduits on the Sound Beach Avenue bridge. Connecticut Natural Gas (CNG) and Aquarion Water Company are next to install their utilities on the bridge. In conjunction with the utility work, the Town's contractor will be working on the footing of the southeast endwall of the bridge and the stems for the endwalls on the east side of the bridge.
  • Week of 11/14/22 -- Frontier Communications is on-site to relocate their conduits on the bridge.
  • 11/11/22 -- Concrete forms were stripped from the last precast section. Wingwalls and endwalls on the east side of the bridge were poured.
  • Week of 10/21/22 -- Work scheduled to complete wing walls and coordinate with Frontier's telecommunication conduits installation work on the bridge
  • Week of 10/24/22 -- the contractor forming and laying out the rebar for the concrete pour for the last culvert section. By the end of the week, the contractor will be removing forms and backfilling. 
  • 6/11/22 -- 2/3 of the pre-cast concrete culvert sections have been installed, the road reopened and the vehicular detour ended
  • 4/1/22 -- Major construction began with a full detour in place  
  • Fall 2021 – Contract awarded to A. Vitti Excavators, LLC.
  • May 2020 -- Sound Beach Avenue Bridge public information webinar held
  • 12/3/2020 -- DPW public hearing held
  • 11/17/2020 -- P&Z CAM approval and recommendations for the construction of a scenic road were received 
  • 11/10/2020 -- ACOE permit received
  • 10/26/2020  -- WWA Permit received

Project Introduction

The existing Sound Beach Avenue Bridge was built in 1925 and rehabilitated in 1977 while adding an additional culvert to the south to relieve flooding. The current structure consists of 2 spans, a concrete deck span, and a concrete box culvert span, which creates a center pier. The existing bridge is located adjacent to Binney Park in Old Greenwich and it has a deteriorated stone masonry fascia. It has rated poorly during the last series of inspections and is recommended for immediate replacement. A most recent routine and underwater inspection concluded that the bridge had continued to deteriorate and the superstructure showed the most damage with exposed rebar, cracking, spalls, honeycombing, and scale on the concrete slabs. If the deterioration continues and is rated at 3 (critical), a load rating restriction will have to be in place which will restrict a majority of truck traffic. The Average Daily Traffic (ADT) in 2017 was approximately 14,500 cars per day.

Project History

Upon notification of the bridge’s poor rating, the Town began to gather preliminary information and seek grant funding for the bridge design and replacement. The Town hired Weston and Sampson, Consultant Engineers, and TranSystems, Traffic Engineers to complete a preliminary assessment of the bridge and surrounding area. A preliminary bridge design assessment requires that the existing roadway and adjacent intersections are reviewed to make sure that they meet the most recent Federal Highway Standards for Roadway Design. Also required is a review of the accident history, emergency access, turning movements, compliance with the most recent Manual on Uniform Traffic Control Devices (MUTCD) standards, and FEMA 100-year flood capacity requirements. This assessment concluded that the current configuration at the intersection of Sound Beach Avenue/Laddins Rock Road/Harding Road is not compliant with the Federal Highway Standards (FHWA). An additional review of crash history data during the design process recommended improvements to the intersection of Sound Beach Avenue and Forest Avenue. Additionally, this area was flagged by the Town’s Flood and Erosion Control Board (FECB) and Emergency Services as an area prone to flooding. This area is listed as a high-priority project under the FECB to mitigate flooding caused during high tide and extreme rain events. Emergency Services flagged this area because emergency vehicles are prohibited from passing through the intersection of concern during large storm events. Three Public Meetings were held, between 2013 and 2018 to present the issues and recommendations noted above. A Municipal Improvement was denied by the Planning and Zoning Commission causing the Town to move forward with only the bridge replacement. The State of Connecticut provided the Town with a commitment to fund through the Local Transportation Capital Improvement Program (LOTCIP) in the amount of $3.9 million dollars.

Project Overview

The existing bridge will be replaced by a single-span precast concrete structure with masonry facing which will match the look of the Wesskum Wood Road Bridge and pedestrian bridges within Binney Park with rounded stones, deep grout, and capstones. The new design will eliminate the center pier which will increase the hydraulic efficiency of the bridge. The bridge can be constructed utilizing Accelerated Bridge Construction (ABC) techniques. This could significantly reduce the road closure time to approximately 3 months. If the road were to remain open to alternating one-lane traffic, it is anticipated the project could take one year to complete. The proposed structure will have masonry fascia to match the existing look and flow with the park setting and surroundings. The elevation of the bridge will change. The bridge serves three purposes – supporting traffic traveling on Sound Beach Avenue, allowing water to flow from Cider Mill Brook into Binney Pond, and allowing pedestrians to safely travel to and from their destination. The bridge replacement will ensure that all of these functions can continue for years to come. Funding for Construction has been requested through the Capital Budget Process for Fiscal Year 2020/2021 and granted in the amount of $3.5 Million. The temporary traffic and pedestrian detour will be the most noticeable impact of this project. Both detours will be posted with signage and last approximately 3 months. For vehicles, it will utilize Harding Road and Forest Avenues. Local driveway access will be maintained throughout construction. For pedestrians, it will utilize the existing crosswalks in the vicinity and the existing sidewalks through Binney Park. It is anticipated that the total project duration will be approximately 1 year. Existing utilities, such as sewer, drain, water, communication lines, and gas will be temporarily relocated prior to the removal of the existing structure.

Sound Beach Ave- pic 1Sound Beach Ave- pic 2

Additional Information 

  • To view the Sound Beach Avenue Bridge closure press release, CLICK HERE

Sound Beach Avenue Bridge Public Information Webinar - May 2020

  • To view a narrated version of the webinar, CLICK HERE.  
  • To view PowerPoint slides of the webinar, CLICK HERE.
  • DPW has created a list of Frequently Asked Questions, CLICK HERE to view this document. 

Sound Beach Avenue Bridge Public Hearing - December 2020

  • To view the PowerPoint slides of the presentation, CLICK HERE.   
  • To view the hearing decisionCLICK HERE.

Contact

Gabriella M. Circosta Cohee, P.E., Senior Civil Engineer
DPW – Engineering Division
E-Mail: gcohee@greenwichct.org
Phone: 203-861-3151