Rating:
4 votes

Bunker Mill Bridge

Washington County, Iowa
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Photos 

Photo taken by Jason Smith in August 2011

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Map 

View Uglybridges.com report

Facts 

Overview
Through truss bridge over English River on Nutmeg Avenue
Location
Kalona, Washington County, Iowa
Status
Closed to all traffic
Future prospects
Slated for rehabilitation for pedestrian use.
History
Built 1887; M-frame portal bracing was added to the Town Lattice portal bracing ca. 1913; closed to traffic in 2003, awaiting rehabilitation as part of a bike trail
Design
Pin-connected Pratt through truss bridge with Town Lattice and M-frame portal bracing
Dimensions
Length of largest span: 118.1 ft.
Total length: 290.0 ft.
Deck width: 13.5 ft.
Vertical clearance above deck: 11.6 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
Kalona (Nutmeg Avenue) Bridge
English River Bridge
Approximate latitude, longitude
+41.46815, -91.68838   (decimal degrees)
41°28'05" N, 91°41'18" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/609526/4591558 (zone/easting/northing)
Land survey
T. 77 N., R. 7 W., Sec. 17
USGS topographic map
Kalona
Inventory numbers
IA 337570 (Iowa bridge number)
BH 14665 (Bridgehunter.com ID)
Inspection (as of 03/2007)
Deck condition rating: Poor (4 out of 9)
Substructure condition rating: Serious (3 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 0.0 (out of 100)
Average daily traffic (as of 2002)
160

Categories 

19th Century (3,854)
Beam (6,159)
Built 1887 (131)
Built during 1880s (1,055)
Closed (2,085)
English River (Iowa) (4)
Historic Bridge Weekend 2013 (144)
Iowa (3,622)
Kalona, Iowa (1)
M-frame portal (33)
NR-eligible (3,751)
One-lane traffic (7,119)
Owned by county (16,527)
 Pin-connected (1,568)
Pratt through truss (3,185)
Pratt truss (5,689)
Span length 100-125 feet (3,307)
Structurally deficient (16,730)
Sufficiency rating zero (307)
Through truss (9,256)
Timber stringer (1,895)
Total length 250-500 feet (3,383)
Town lattice portal bracing (10)
Truss (23,618)
Washington County, Iowa (64)
Wooden deck (5,415)

Update Log 

  • October 26, 2012: Updated by Jason Smith: Added categories "Town lattice portal bracing", "Pin-connected", "English River (Iowa)"
  • August 7, 2012: Updated by Jason Smith: Updated the information on the bridge
  • July 12, 2012: Updated by Nathan Holth: Bridge to be rehabbed. Added exact closure date, and added common name.
  • September 6, 2011: Updated by Jason Smith: Added information on the bridge
  • July 18, 2011: Updated by Jason Smith: Bridge is still standing

Sources 

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Comments 

Kalona (Nutmeg Avenue) Bridge
Posted September 6, 2011, by Anonymous

Nice pics. The top part in #10 looks like it says Phoenix Iron Co.