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Sound Beach Avenue Bridge and Intersection Improvements Information (Town Project #12-17)

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Replacement of the Sound Beach Ave. Bridge over Cider Mill Brook
Roadway Improvements on Sound Beach Ave.
 Intersection Improvements at Sound Beach Ave./Laddins Rock Rd./Harding Rd.
Intersection Improvements at Sound Beach Ave. and Forest Ave.

Contact: Gabriella Circosta-Cohee, P.E., Senior Civil Engineer
              DPW-Engineering Division

E-Mail:  Gabriella.Cohee@greenwichct.org


Description:

The Sound Beach Avenue Bridge was built in 1925 and rehabilitated in 1977.  It has rated poorly during the last series of inspections.  It has continued to deteriorate and is in need of replacement.  After notification was initially received of the bridge’s poor rating, the Town began to gather preliminary information and seek 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.  The 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 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.

The 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) which is why these items have been included with the Sound Beach Avenue bridge project.  Additional review of crash history data during the design process has expanded the scope of the project to include reviewing the intersection of Sound Beach Avenue and Forest Avenue.  Finally, based on recommendations from the Town’s Flood and Erosion Control Board and input from Emergency Services organizations, this is a high priority project to alleviate flooding issues on Sound Beach Avenue because emergency vehicles are prohibited from passing through the intersection of concern during large storm events, as well as to mitigate flooding caused during high tide and extreme rain events.

A preliminary design was completed to come up with a reasonable cost estimate reviewing the issues noted above, and shortly thereafter, DPW applied for a grant for the funding through the STP program and later LOTCIP.  The Town was given approval for the LOTCIP grant in the amount of $5 million dollars.

Public Information Meeting No. 1 – November 21, 2013:

The Town of Greenwich, DPW Engineering Division along with the Town’s consultants, held a Public Information meeting to introduce the project to the public.  The Town presented the bridge replacement along with the concept of a roundabout at the Sound Beach Avenue/Laddins Rock Road/Harding Road intersection.  Also discussed were the road closure and detour options.  The Town obtained input from the public and proceeded with preliminary design.

Public Information Meeting No. 2 – May 18, 2017:

The Town of Greenwich, DPW Engineering Division along with the Town’s consultants, held a Public Information meeting to introduce the 30% preliminary design to the public.  The Town presented the bridge replacement along with the roundabout at the Sound Beach Avenue/Laddins Rock Road/Harding Road intersection, a “T” intersection to improve traffic safety at Forest Avenue, road raising of Sound Beach Avenue.  Also discussed were the road closure and detour options.  The Town obtained input from the public and proceeded with preliminary design while incorporating public comments.

Public Information Meeting No. 3 – January 25, 2018:

The Town of Greenwich, DPW Engineering Division along with the Town’s consultants, held a Public Information meeting to explain the revisions to the 30% preliminary design to the public.  The Town presented the bridge replacement along with the roundabout at the Sound Beach Avenue/Laddins Rock Road/Harding Road intersection, a modified intersection to improve traffic safety at Forest Avenue, road raising of Sound Beach Avenue.  Also discussed were the road closure and detour options.  The Town presented changes in the design since the last Public Information Meeting which were based on public comments.  The changes since the last Public Information Meeting were as follows:

   Intersection at Sound Beach Ave./Laddins Rock Road/Harding Road:

·                   Proposed 5’ wide sidewalk in lieu of 10’ wide sidewalk

·                   Renderings created to show proposed conditions

·                   Accident Data Clarification

·                   Address taking of park land

·                   Address existing versus proposed impervious area

   Intersection at Sound Beach Avenue & Forest Avenue:

·                  Maintain traffic island and several trees

·                  Minimize impact to property owners

·                  Improve Traffic Safety

   Flood Control and Emergency Access Road Raising:

·                  Emergency services access clarification

·                  Reduce trees to be removed

    Click the link below to see a recorded video of the presentation as provided by "INGreenwich":  

https://www.facebook.com/INGreenwichCT/videos/2069353109772287/

 

 
Documents
 
   

Documents Coming Soon:

Public Information Meeting No. 3 – January 25, 2018 Q&A

 

Other Information:

If you are interested, the following is link for your information, to the federal highway standards for roundabouts.  They have some really useful outreach and education materials posted on their website that helps educate the public on Roundabouts as a proven safety countermeasure:

https://safety.fhwa.dot.gov/intersection/innovative/roundabouts/


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