US Army Corps Report – Phase 1 Construction Activities Next 90 Days – December 2015

US Army Corps Report – Muddy River Flood Risk Management & Environmental Restoration Project Phase 1 Construction Activities Next 90 Days

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upperfenspond

Upper Fens Pond

We have been very busy since the last November update!  We implemented another traffic change to both vehicular and pedestrian traffic on Brookline Avenue, Park Drive, and Riverway.  This traffic change opened the end state new left turn onto Park Drive from Riverway to vehicular traffic and the end state crosswalks for pedestrian use.  In addition, the Jug Handle roadway and its sidewalk were removed permanently for vehicular and pedestrian traffic flow.  This traffic change will allow us to “daylight” the Muddy River in the Jug Handle roadway area.

Even since the preparation of this December update on Friday, we have done tremendous work over this past weekend!  On Saturday, 19 December (ahead of schedule), we turned off the river diversion pumps and opened the river back at Upper Fens Pond, flowing through the Avenue Louis Pasteur Culvert in the new constructed river channel.  Attached are a couple of photos of Upper Fens Pond showing the constructed Olmsted Island on Sat right after the pumps were turned off and today.

It is wonderful to see a section of the completed work for the project!  I want to thank the entire construction team for their hard work over these last few months so that we can open the Upper Fens Pond with river flow before the end of 2015.  In addition, the patience and interest of the local residents continue to make this challenging work possible. 

Wishing you a Happy and Safe Holiday Season!


General: The Muddy River Flood Risk Management (FRM) & Environmental Restoration Phase 1 Construction Project is located in the footprint generally between the Riverway downstream to Avenue Louis Pasteur. The major project components involve the installation of a 10-foot by 24-foot box culvert under the Riverway roadway, the installation of 10-foot by 24-foot box culvert under the Brookline Avenue roadway, daylighting of the area between the Riverway and Brookline Avenue, and daylighting of the area between Brookline Avenue and Avenue Louis Pasteur. Daylighting is the removal of existing twin 72″ culverts and excavation of the area to return the waterway to a natural state. This Notice is intended to identify the general construction activities that will be performed in the next 90 days. A figure that shows the existing conditions and the proposed improvements is at the end of this report.

December 2015 through February 2016 Period:

  • In order to continue work on the project, a traffic shift took place on 5 December in order to open the end state new left turn onto Park Drive from Riverway and open the end state crosswalks for pedestrian use. This shift allowed for the permanent closure of the Jug Handle roadway and its sidewalk so that the Muddy River can be daylighted in this area. Since the closure, the sidewalk and roadway has been removed. Upcoming activities is the installation of the steel sheeting and active excavation of the southside (right side, looking downstream) of the Jug Handle area. Excavation to construct the northside will take place in early March once the existing twin 72” culverts are abandoned and the river is flowing through the new culverts and the southside of the constructed river. 
  • The relocation of a portion of the existing 24” sewer line in the former Sears Parking Lot began mid October. Since that time, the southern portion of the new sewer line was installed from the existing manhole on Riverway Connector to a new manhole on the street, and has been advanced up to the river diversion sheeting and backfilled. The completion of the northern portion and connection to the existing system will take place in early 2016, once the existing twin 72” culverts are abandoned.
  • In the former Sears Parking Lot work area, active excavation to construct the southside (right side, looking downstream) of the new river channel from the new Riverway Culvert to the new Brookline Avenue Culvert has begun to include grading of the new banks and installation of articulated concrete blocks (ACBs) at the downstream outlet of the new Riverway culvert. Excavation will continue to the new Brookline Avenue Culvert now that the southern portion of the new sewer line is installed and backfilled; and the sheetpile support of excavation has been removed. Excavation to construct the northside will take place in early March once the existing twin 72” culverts are abandoned and the river is flowing through the new culverts and the southside of the constructed river.
  • Upstream of Avenue Louis Pasteur (ALP), the precast concrete culvert sections and granite veneer facade were installed just before the end of November. Since that time, the “daylighting” between the Upper Fens Pond and this extension piece of precast concrete culvert have continued with the removal of the existing twin 72” culverts, and the recreation of the historic Olmsted Island, which will allow the Muddy River to flow through this area and the diversion pumps to be removed before Christmas. Remaining plantings on the upland areas of this “daylighted” area will be planted in the next planting season, starting 1 May 2016.
  • Downstream of Avenue Louis Pasteur, the contractor has completed the construction of the new flood risk management channel. The temporary steel sheeting cofferdam at this downstream end of Phase 1 Construction will be removed when the river diversion pumps are turned off. Remaining plantings on the upland areas will be planted in the next planting season, starting 1 May 2016.
  • At the end of this notice we have included some pictures that show the traffic change; and construction progress for the pedestrian walkways; the former Sears Parking Lot; the
  • If you have any questions, require additional information or would like to be added to the Project Contact List, please email the projectmailbox at MuddyRiver@usace.army.mil

OCTOBER Traffic Patterns and Project Photos

Project Phase 1

(U.S. Army Corps of Engineers photos)