The Waterford Bridge, formerly designated Bridge L0327 and now Bridge L3275, is a historic steel truss bridge over the Cannon River in Waterford Township, Minnesota, United States. It was constructed in 1909 and is one of the state's earliest surviving bridges to use rigid rather than pinned connections. Moreover, it is Minnesota's only known road bridge in which some of the rigid connections are fastened with bolts rather than rivets.[2]
Waterford Bridge | |
 The Waterford Bridge viewed from the southwest | |
   | |
| Location | Canada Avenue over the Cannon River, Waterford Township, Minnesota |
|---|---|
| Coordinates | 44°29′15″N 93°7′42.5″W / 44.48750°N 93.128472°W |
| Area | Less than one acre |
| Built | 1909 |
| Built by | Hennepin Bridge Company |
| Architect | Charles A. Forbes |
| Architectural style | Camelback through truss |
| MPS | Iron and Steel Bridges in Minnesota MPS |
| NRHP reference No. | 10000580[1] |
| Designated | August 26, 2010 |
The bridge was listed on the National Register of Historic Places in 2010 for having state-level significance in the theme of engineering.[3] It was nominated for being a rare surviving example of Minnesota's once-common camelback through truss bridges, and for its early and uniquely transitional rigid connections.[4]
Description
editThe Waterford bridge is a single-span, eight-panel, camelback through truss. It measures 140 feet (43 m) long with a 16-foot-wide (4.9 m) deck. The setting is rural, despite being just two miles (3.2 km) northeast of Northfield, Minnesota.[4]
The Waterford Bridge is one of the few remaining camelback through trusses in Minnesota. The others that are also listed on the National Register of Historic Places are the Gateway Trail Iron Bridge, the Dodd Ford Bridge, and the Long Meadow Bridge.[4]
History
editThe Waterford Bridge was constructed in 1909. It replaced a previous bridge of unknown date which had been there since at least 1879.[citation needed] The new bridge was designed by Dakota County engineer Charles A. Forbes and built by the Hennepin Bridge Company for $5,000. At the time most truss bridges were still being constructed with the structural members held together by pins. The builders of the Waterford Bridge opted for stronger rigid connections, even though this was not yet legally required except for state-funded projects. Unusually, though, many of these connections were made with bolts, a unique intermediate choice proceeding the transition to fully riveted bridges.[4]
In the early 1980s the bridge was threatened by erosion and local citizens raised $40,000 to effect repairs.[4] However, in 1991 the bridge was sufficiently deteriorated that it was closed to vehicular traffic and the road rerouted over a new bridge built nearby. In 2014 the southeast abutment was rebuilt again with a grant from the National Trust for Historic Preservation. As of January 2014 the historic bridge carries a trail used by pedestrians, ATVs, and snowmobiles.[5]
See also
editReferences
edit- ^ "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
- ^ "Waterford Bridge (Bridge L3275)". Historic Bridges. Minnesota Department of Transportation. 2016. Retrieved 2016-08-24.
- ^ "Waterford Bridge". Minnesota National Register Properties Database. Minnesota Historical Society. 2009. Retrieved 2016-08-23.
- ^ a b c d e Gardner, Denis P. (March 2010). National Register of Historic Places Registration Form: Waterford Bridge. National Park Service. Retrieved 2016-07-04.
- ^ Minnesota Department of Transportation (MnDOT) Local Historic Bridge Report (PDF) (Report). Minnesota Department of Transportation. January 2014. Retrieved 2016-08-24.