3 votes

Natural Pier Bridge


Natural Pier Bridge

Photo taken by Jack Schmidt in July 2013


BH Photo #275691



Through truss bridge over Clark Fork on CR 089
Mineral County, Montana
Open to traffic
Built 1916; rehabilitated 1999
- Lord Construction Co. of Missoula, Montana
Polygonal Warren through truss
Length of largest span: 174.9 ft.
Total length: 371.1 ft.
Deck width: 16.1 ft.
Vertical clearance above deck: 11.2 ft.
Posted to the National Register of Historic Places on January 4, 2010
Approximate latitude, longitude
+47.01392, -114.50742   (decimal degrees)
47°00'50" N, 114°30'27" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/689446/5209726 (zone/easting/northing)
Quadrangle map:
Stark South
Average daily traffic (as of 2003)
Inventory number
BH 23101 (Bridgehunter.com ID)
Inspection report (as of April 2017)
Overall condition: Poor
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 28.6 (out of 100)
View more at BridgeReports.com

Update Log 

  • May 7, 2020: Updated by Nick Boppel: Fix map marker
  • April 22, 2019: New photos from John Bernhisel
  • April 5, 2018: Added by Richard Doody
  • October 15, 2016: New photos from David Jones
  • June 3, 2016: Updated by Luke: Common name + builder from informational plaque
  • February 23, 2014: New photos from Jack Schmidt


  • Jack Schmidt - jjturtle [at] earthlink [dot] net
  • Luke
  • David Jones - david2jpix [at] yahoo [dot] com
  • Richard Doody
  • John Bernhisel - Johnmbernhisel [at] gmail [dot] com
  • Nick Boppel - nickboppel01 [at] gmail [dot] com


Natural Pier Bridge
Posted April 5, 2018, by Luke

It's no problem, it's happened to me as well.

Natural Pier Bridge
Posted April 5, 2018, by Richard Doody (rpdoody3 [at] gmail [dot] com)

It appears to be a broken hyperlink in the homepage map. I initially clicked on Mineral Co. MT which took me to a list that county which did not list this bridge. It was only when I attempted to import the NBI info that I discovered that a page for this bridge already existed. I had a similar experience with using the map for Whitman Co., WA to post the Tekoa viaduct. Sorry for the duplication.

Natural Pier Bridge
Posted April 5, 2018, by Luke
Clark Fork Bridge
Posted April 6, 2009, by Don

Very cool bridge, thanks for the pictures!

Clark Fork Bridge
Posted April 4, 2009, by Anthony Dillon (spansaver [at] hotmail [dot] com)


Nice pictures! Will look forward to seeing more.

Clark Fork Bridge
Posted April 4, 2009, by Van Hildreth (vanh-1 [at] excite [dot] com)

Hello - let me know if these work. As the sign indicates this bridge is known as the "natural pier bridge" for obvious reason as seen in photos.

I have a few more bridges to send your way today. And will be sending more in the future. Also, let me know if you like detail photos or just the whole bridge.