- Ada Covered Bridge
bridge_name=Ada Covered Bridge
caption=Upstream view from observation deck in park.
carries=Fase/Bronson St. (footpath)
maint=Kent County Road Commission
Brown truss Covered bridge
closed=still open, foot traffic only
TIGERimage, Red dot marks bridge
The Ada Covered Bridge is a convert|125|ft|m|sing=on span
Brown truss covered bridgeerected in 1867 in Ada, Michigan, United States. Carrying Bronson Street across the Thornapple River, it is located just south of where the Thornapple enters the Grand River, in turn just south of M-21. It is listed on the National Register of Historic Places.
The bridge uses the Brown truss system, consisting of diagonal compression beams and almost vertical tension members (slanting in at the top toward the center of the span) was patented by Josiah Brown of Buffalo, New York in 1857. A timber bearing Brown's name was discovered during repair work carried out in 1913.Historical marker data, from [http://www.michigan.org/travel/detail.asp?m=2&p=B5658 marker detail] page on michigan.org site, accessed October 09, 2006]
The bridge is convert|125|ft|m long, and originally rested on wooden pilings. As is typical for covered bridges, its gabled roof is covered with creosote shingles.
Michigan State Legislatureauthorised Ada Township to borrow up to $3,000 for building or maintaining bridges in the area. Construction of this bridge, also known as the "Bradfield Bridge" was carried out in 1867 by William Holmes.
Prior to construction of the upstream dam, [An image of this dam: posted at the bridge, "it is said that farmers used to drive wagons loaded with stones onto the bridge during high water to hold it to the foundation."Historical marker data, from [http://www.wmta.org/coveredbridges/ada_bridge.html ada bridge] page on wmta.org site, accessed October 09, 2006]
Repair work was carried out in 1913 to modify the trusses, and replace the timber abutments with reinforced concrete. The bridge was part of an important artery into the village of Ada until 1930, when the main highway was rerouted and a concrete bridge built further down the Thornapple River. At that time the bridge was closed to automobile traffic, reverting to pedestrian use only.
In 1941 the Kent County Road Commission and the
Works Progress Administrationmade extensive restorations, re-roofing the bridge with new protective creosote shingles and replacing many of its decayed underlying supports with new beams. The Road Commission purchased a nearby barn to supply wood for replacement of badly deteriorated elements. [synthesised from [http://www.wmta.org/coveredbridges/ada_bridge.html wmta.org] and [http://www.relocate-america.com/states/mi/cities/ada.htm Ada page] on relocate-america.com site, accessed October 09, 2006]
The bridge was listed with the Michigan State Register on
May 9, 1969and with the National Register on February 16, 1970. It was awarded a Michigan Historical Marker (site L0075) on August 28, 1974. [marker data from [http://www.michmarkers.com/startup.asp?startpage=L0075.htm L0075] page on michmarkers.com site, accessed October 09, 2006] It is one of four existing publicly owned covered bridges in Michigan.from [http://www.relocate-america.com/states/mi/cities/ada.htm Ada page] on relocate-america.com site, accessed October 09, 2006]
In 1979 the roof collapsed due to heavy snow, and the bridge was restored using funds raised by private donations. Shortly after the repairs were finished, the bridge was completely destroyed by fire. The citizens again rallied, this time with the help of the Amway corporation, headquartered in Ada, and rebuilt it once again. The replica bridge, now resting on concrete abutments, is convert|14|ft|m wide and convert|125|ft|m long.
List of Michigan covered bridges
List of Registered Historic Places in Kent County, Michigan
* [http://my.net-link.net/~michaelf/ada.htm Michigan Covered bridge site]
* Aerial view from [http://maps.google.com/maps?hl=en&ie=UTF8&om=1&z=18&ll=42.952477,-85.486325&spn=0.002843,0.004517&t=h Google maps]
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