Old Elkhorn Ave Bridge
Photo
Overview
https://www.flickr.com/photos/abstractstv/5262900306/in/pool...
https://www.flickr.com/photos/abstractstv/5262900306/in/pool-39289335@N00/
License: Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)
BH Photo #293712
Facts
- Overview
- Concrete pony arch bridge over Fresno Slough on an old alignment of Elkhorn Ave
- Location
- Fresno County, California
- Status
- Open to pedestrians only
- History
- Built 1916;
- Design
- Concrete Pennsylvania Pony Truss, or maybe a Concrete pony arch
- Also called
- Burrel Bridge
- Approximate latitude, longitude
- +36.48528, -120.00493 (decimal degrees)
36°29'07" N, 120°00'18" W (degrees°minutes'seconds") - Approximate UTM coordinates
- 10/768310/4041946 (zone/easting/northing)
- Quadrangle map:
- Five Points
- Inventory number
- BH 62921 (Bridgehunter.com ID)
Update Log
- September 7, 2014: Updated by Fmiser: Changed design from "concrete arch" to "concrete pennsylvania pony", added construction year.
- September 6, 2014: New Street View added by James McCray
Comments
Looking at the upper chord, I believe this may actually be an extremely rare concrete pony truss, perhaps even a Pennsylvania, which would certainly be the only one I've ever seen! I think this because the upper chord is polygonal whereas rainbow arch chords are smoothly curved, and also, the web members clearly show the Pennsylvania truss configuration. I can't tell if it's fully concrete or concrete-encased steel, but very unique either way!
It is clearly a Rainbow Arch, but I doubt it is a Marsh Arch. Marsh Arch bridges don't seem to have diagonal members - at least not that I have encountered.
Found this awesome bridge! Not on NBI, and not previously listed on here. Now, is this a "Marsh Arch?" Or is it something else? I just listed it as generic "Concrete Pony Arch." Anyone with more info please comment.
This page's URL is http://bridgehunter.com/ca/fresno/old-elkhorn-ave/
Clearly shaped like a Pennsylvania truss. Does it function like a truss? I don't know. I don't think it's really an arch, but without stress/load measurements it can be tricky to figure out what it _acts_ like - but it _looks_ like a Pennsylvania truss.
It can't be plain concrete as those diagonals are under tension - and concrete is nearly useless under tension.
The construction date is from a comment on the Flicker page.
Nice find!!