County Farm Bridge
The bridge has two main components. The actual bridge section is a semi-circular arch of cut granite situated within a sloping stone causeway constructed of random-sized boulders The arch is incorporated into the causeway approximately 250 feet south of its northern endpoint at the Burton Highway. The contrasting masonry of the two structures merges along an angular interface which slopes sharply upward from the base of the arch. As a result, the actual arch opening is centered within a "V"-shaped section of evenly-coursed stonework overlain by a narrow band of irregular boulders.
Regarding dimensions, the stone arch has a 17'11" span and a through measurement of 28'2". The semi-circular opening is outlined by 18" thick voussoirs which begin at a spring line 7'2" above the water's surface and rise to a central keystone at the apex, 15'10" above the water. The crown section measures 6'8", carrying the roadway a total height of 22'6" over the brook. (NRHP Form)
- Stone arch bridge over Whiting Brook on Old County Farm Road
- Hillsborough County, New Hampshire
- Open to traffic
- Built 1885 by the Ward Brothers
- - Ward Brothers
- Stone arch
Length of largest span: 17.1 ft.
Posted to the National Register of Historic Places on May 14, 1981
- Approximate latitude, longitude
- +42.85749, -71.81733 (decimal degrees)
42°51'27" N, 71°49'02" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 19/269827/4748840 (zone/easting/northing)
- Quadrangle map:
- Inventory numbers
- NRHP 81000070 (National Register of Historic Places reference number)
BH 50636 (Bridgehunter.com ID)
- November 20, 2020: New photo from Geoff Hubbs
- November 26, 2014: Photo imported by Dave King
- December 19, 2011: Added by J.P.