Sagamore Bridge

The Sagamore Bridge in Sagamore, Massachusetts carries Route 6 and the Claire Saltonstall Bikeway across the Cape Cod Canal, connecting Cape Cod with the mainland of Massachusetts. It is the more northeastern of two automobile canal crossings, the other being the Bourne Bridge. Most traffic approaching from the north follows Massachusetts Route 3 which ends at Route 6 just north of the bridge, and the bridge provides direct expressway connections from Boston and Interstate 93.

Sagamore Bridge
Cape Cod Canal - Sagamore Bridge
Coordinates41°46′34.14″N 70°32′36.13″W
Carries4 lanes of US 6
1 lane of Claire Saltonstall Bikeway
CrossesCape Cod Canal
LocaleBourne, Massachusetts (Sagamore Beach-Cape Cod)
Maintained byU.S. Army Corps of Engineers
Characteristics
DesignArch bridge with suspended deck
Total length1,408 ft (429 m)
Width40 ft (12 m)
Height275 ft (83.82 m)
Longest span616 ft (188 m)
Clearance below135 ft (41 m)
History
Construction start1933
Construction end1935
OpenedJune 22, 1935
Statistics
TollNone
Location

There is a six-foot wide[1] sidewalk for pedestrian and bicycle access on the east side of the bridge. The sidewalk is slightly raised, but there is no fence or barrier between it and car traffic, so cyclists are recommended to walk their bicycle.[2] The bridge road is plowed in winter, although the sidewalk is sometimes unplowed and unpassable.[3] The bridges to the Cape are sometimes closed for safety during high winds.[4]

History
The southern approach to the bridge

The bridge and its sibling the Bourne Bridge were constructed beginning in 1933 by the Public Works Administration for the U.S. Army Corps of Engineers, which operates both the bridges and the canal. Both bridges carry four lanes of traffic over a 616 feet (188 m) main span, with a 135 feet (41 m) ship clearance. They opened to traffic on June 22, 1935. The design of the Sagamore and Bourne bridges was later copied in miniature for the John Greenleaf Whittier Bridge that connects I-95 from Newburyport to Amesbury, Massachusetts.

The bridges replaced a drawbridge which was built before the canal was widened. The original bridge approaches are still visible to the north of the modern bridge, though both approaches are in low-traffic residential areas. In 2004, construction began to replace the rotary that connects Route 6 and Route 3 to the bridge with a trumpet interchange known as the "Sagamore Flyover". This project had been delayed for many years because of a controversy about the disruption of homes and businesses in the area. The project finally commenced because of the severe gridlock at the rotary, which was built to accommodate a much smaller amount of traffic. The flyover was completed in late 2006.

The Army Corps of Engineers replaced the bridge deck, the sidewalk, and the lighting in May 2010. In October 2019, the Army Corps of Engineers recommended replacing the bridge with a wider bridge with four travel lanes, one auxiliary lane in each direction, bike and pedestrian paths, shoulders, and a median. The recommendation said that replacement was more cost-effective than upgrading the existing bridge in order to reduce long summertime backups.[5]

See also

References
  1. "Sagamore And Bourne Bridge Statistics". The Enterprise. 30 January 2015. Retrieved 9 September 2017.
  2. Sullivan, John (20 September 2015). "Coffeeneuring the Cape Cod Canal. Both Sides End to End and Crossing Both Bridges". A Midnight Rider. Retrieved 9 September 2017.
  3. Burke, Kevin (19 January 2017). "Army Corps: No Snow Clearing From Bridge Sidewalks". The Bourne Enterprise. Retrieved 9 September 2017.
  4. Bourne, Sagamore bridges may close if Hurricane Sandy brings sustained winds of 70 mph
  5. Knapschaefer, Jonanna (October 14, 2019). "Corps Call for $1-Billion Cape Cod Bridge Replacements". Engineering News Record. p. 20.
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