Rating:
No votes cast

Tunnel Mill Bridge

Photos 

Piers on the northern bank

Photo taken by Kevin Skow in September 2014

Enlarge

BH Photo #295214

Map 

Street View 

Description 

Only the piers and raised earthen approaches remain from this bridge. Area now used as a canoe launching site. County highway R27 crosses the river a couple of hundred yards west of the piers. The old gravel roadbed is still visible on both the north and south side of the river.

Facts 

Overview
Lost Pratt through truss bridge over Boone River on Tunnel Mill Road
Location
Hamilton County, Iowa
Status
Replaced by a new bridge, only the piers and raised approaches remain
History
Built 1899; Replaced 1973
Design
Pratt through truss
Approximate latitude, longitude
+42.35038, -93.84490   (decimal degrees)
42°21'01" N, 93°50'42" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/430412/4689025 (zone/easting/northing)
Inventory number
BH 63111 (Bridgehunter.com ID)

Categories 

19th Century (6,181)
Boone River (23)
Built 1899 (305)
Built during 1890s (2,459)
Hamilton County, Iowa (43)
Have street view (22,040)
Iowa (5,781)
Lally columns (254)
Lost (18,649)
Lost 1973 (45)
Lost during 1970s (386)
Owned by county (18,846)
Pratt through truss (4,596)
Pratt truss (8,016)
Replaced by new bridge (12,349)
Through truss (12,893)
Truss (29,433)

Update Log 

  • June 12, 2016: Updated by Luke: Added build date
  • September 22, 2014: Updated by Luke: Added type based on historic aerial imagery
  • September 22, 2014: New Street View added by Kevin Skow