A bridge replacement project located in Weston along the Stony Brook and Hobbs Brook confluence.
The Weston Transfer Station Bridge Replacement has been completed. As of 9/9/13, outstanding items including constructing the stormwater/flood storage basin and the wetland replication area have been completed
Planning for the Weston Bridge Transfer Station began in 2010 after high floods in March damaged the structural integrity of the bridge. Construction began in the summer of 2013 and was completed early September 2013.
After flooding in March 2010, the Town of Weston is replacing a small bridge to its heavily used Transfer Station. The bridge crosses the Stony Brook and the roadway leading to it abuts the Hobbs Brook, the two major tributaries feeding Cambridge’s water supply reservoirs. The project will ultimately benefit water quality and water supply security by pulling the road back and pitching it away from the Hobbs Brook, by creating a larger opening under the new bridge to reduce flooding, and by constructing a combination compensatory flood storage and stormwater treatment basin near the southern parking lot. Watershed staff made routine inspections to ensure construction phase impacts were minimal and that erosion controls were functioning as intended.
Initial condition of the Weston Transfer Station Bridge and access road. The bridge and roadway are set too low for the high flood levels in the Stony Brook, forcing water to pass over the bridge. Photo taken in the fall of 2008.
Water from Stony Brook passing over the road and joining Hobbs Brook. The flood waters further erode the streambank of Hobbs Brook and degrade the structural stability of the bridge. Photo taken in the fall of 2008.
Massive flooding over the Transfer Station Bridge prior to construction. Photo taken on March 29, 2001.
Good placement for a no-parking zone! Photo taken on May 15, 2006.
Extreme flooding at the Weston Transfer Station Bridge. Photo taken on March 14, 2010.
Flooding in the wooded wetland north of the confluence. Photo taken on May 15, 2006.
Photo showing the build up of sediments and road-sand along the streambank. Photo taken on March 17, 2004.
Silt curtain placed along the streambank prior to construction of the new bridge and road repairs. The curtain tapers the impacts that construction might have on the stream by preventing downstream plumes and isolating suspended sediments from the main channel of the stream. Photo taken on July 10, 2013.
Basin construction next to the Weston Transfer Station parking lot. This basin will intercept stormwater from the parking lot, which will settle sediments and slow water velocity before joining Stony Brook. Photo taken on July 17, 2013.
Streambank that the basin will discharge to. Construction erosion control BMPs are in place (the black silt fence and yellow silt curtain). Photo taken on July 17, 2013.
Slope further armored with temporary straw waddles and gravel to filter out sediments from stormwater during construction before it reaches Stony Brook. Photo taken on July 26, 2013.
Photo of stormwater pooling along the parking lot access road. After the basin construction, this water will be routed through the basin to be treated and slowly discharged to Stony Brook. Photo taken on July 26, 2013.
Beginning of construction on the bridge. Bypass pipes have been placed to allow Stony Brook to flow through the work zone. The large white sandbags channel Hobbs Brook around the work zone, which will be dewatered for construction. Photo taken on July 19, 2013.
View of construction work zone from the road. Photo taken on July 19, 2013.
Stabilized construction entrance/exit for sediment transport mitigation. The gravel stones are placed over filter fabric to help remove sediment from construction equipment and vehicles which will reduce sediment transport from the site. Photo taken on July 19, 2013.
Straw wattles and silt curtain along Hobbs Brook streambank. These are common construction BMPs that filter and contain suspended sediments from construction activities. Photo taken on July 19, 2013.
Construction workers placing stone into the pit for base of the gabion walls. Photo taken on July 24, 2013.
Metal cages placed for the construction of the gabion walls. Photo taken on July 24, 2013.
Completed portions of the gabion retaining walls along the Hobbs Brook and adjacent road. The road will be back-filled to meet the top of the wall. Photo taken on July 26, 2013.
Portion of the gabion wall surrounded by straw waddles and the silt curtian. Photo taken on July 26, 2013.
Site Map for the Weston Transfer Station Bridge Replacement Project.
Panorama; preparing the new bridge deck footings, Photo taken 8/6/13
Securing new bridge deck over Stony Brook, Photo taken 8/12/13
New bridge deck. Photo taken 8/15/13 at Stony Brook right bank facing northeast at the confluence with Hobbs Brook
Stony Brook facing south at the new transfer station bridge, Weston. Photo taken 8/15/13
Guard rail and rip-rap stream bank. Photo taken 8/19/13
Guard rail installed on the bridge deck. Photo taken 8/19/13
Roadway abutting Hobbs Brook resurfaced. Photo taken 8/19/13
Finished stormwater, flood storage basin
Runoff from roadway, parking area sheeting to basin
Have questions or comments about the Weston Transfer Station Bridge Replacement Project? Email us!