HistoricBridges.org Menu:
HistoricBridges.org Menu:

Divider

HistoricBridges.org: Bridge Browser

Home

Divider

Bertram Bridge

Ely Street Bridge

   
                  


Advertisements:

Divider
Bach Steel - Experts at historic truss bridge restoration.
Bertram Bridge
Promotions:


Chicago's Bridges Book (By HistoricBridges.org author Nathan Holth): Available Here!

Divider

View Historic Bridges Available For Reuse (These make great cost-effective trail bridges.)

Divider

Show your support for preservation of Virginia's Waterloo Bridge by signing an online petition!

Bridge Documented: July 2, 2009
View Photos
and Videos
View Maps
and Links

Key Facts
Bridge Name Facility Carried / Feature Intersected Location Structure Type Construction Date and Builder/Engineer
X Bertram Bridge
Ely Street Bridge
Ely Street Over Big Creek Bertram: Linn County, Iowa Metal 5 Panel Pin-Connected Pratt Through Truss, Fixed 1891 By Builder/Contractor: J. E. Jayne and Son of Iowa City, Iowa
Technical Facts
Main Span Length Structure Length Roadway Width Main Spans Approach Spans
89 Feet (27.1 Meters) 208 Feet (63.4 Meters) 13.5 Feet (4.1 Meters) 2 2

Historic Significance Rating (HSR)

Primary Photographer(s): Nathan Holth and Rick McOmber

This Bridge No Longer Exists!

This bridge includes two relatively short five panel wrought iron through truss spans and two wooden stringer approach spans. The bridge was constructed by J. E. Jayne Bridge Company, a regional bridge builder from Iowa City of whom very few known examples would appear to remain. As such, this bridge is significant as a well-preserved, multi-span, unaltered example of this bridge company's work. The bridge retains good historic integrity although original railings are missing and some plates were welded to the floorbeam flanges. The unusually shaped original builder plaque remains mounted on top of the portal bracing.

The composition of this truss bridge is traditional, suggesting that the J. E. Jayne Bridge Company was a typical regional bridge builder similar to the various bridge regional bridge companies operating nationwide during the period. The composition of the truss is as follows: Top chord and end post: back-to-back channels with cover plate and battens. Hip verticals: loop-forged eyebars. Other verticals: back-to-back channels with lattice on each side. Bottom chord: loop-forged eyebars. Portal bracing: paired angles riveted to lattice webbing. Sway bracing: paired angles riveted together. Lateral bracing: rod. Floor beams: built-up "fishtail" style beams. Identified fabricator names on iron: Carnegie. Railing: Modern Armco guardrails. Deck: wooden deck stringers with asphalt wearing surface. Substructure: Metal caissons (lally columns).

The bridge has been well maintained and a preservation commitment seems apparent on this historic bridge. An attractive red paint highlights the complex beauty of the trusses and it also protects the bridge's metal from rust, thus preventing section loss and pack rust. With a continuing preservation commitment in the future, this bridge will serve faithfully for decades to come.

Information and Findings From Iowa's Historic Bridge Inventory

Discussion of Bridge

Click To View.These two identical Pratt through trusses extend across Big Creek in the village of Bertram in southern Linn County. A bridge plate indicates that it was built by J.E. Jayne and Son of Iowa City, Iowa, in 1891. Minutes of a meeting of the Linn County Board of Supervisors in January 1892 reported that the 224-foot Bertram Bridge, with iron tube piers and two 20-foot approaches, had cost an aggregate sum of $2,927. The Pratt through truss style was utilized on many bridges built in Linn County in the late nineteenth and early twentieth centuries. Since its construction, the Ely Street Bridge has carried sparse traffic and currently maintains a high degree of both structural and historically integrity [adapted from Roise, Hess, and Crow-Dolby 1992].

Bridge Considered Historic By Survey: Yes

Visit Iowa's Historic Bridge Website

Divider

Photos and Videos: Bertram Bridge

Available Photo Galleries and Videos

Click on a thumbnail or gallery name below to visit that particular photo gallery. If videos are available, click on a video name to view and/or download that particular video.

 
View Photo Gallery Bridge Photo-Documentation
Original / Full Size Photos
Includes overview and detail photos. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
View Photo Gallery Bridge Photo-Documentation
Mobile Optimized Gallery
Includes overview and detail photos. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer

View Maps
and Links

Divider
 
Home Top

Divider

About Contact Footer

© Copyright 2003-2014, HistoricBridges.org. All Rights Reserved. Disclaimer: HistoricBridges.org is a volunteer group of private citizens. HistoricBridges.org is NOT a government agency, does not represent or work with any governmental agencies, nor is it in any way associated with any government agency or any non-profit organization. While we strive for accuracy in our factual content, HistoricBridges.org offers no guarantee of accuracy. Information is provided "as is" without warranty of any kind, either expressed or implied. Information could include technical inaccuracies or errors of omission. Opinions and commentary are the opinions of the respective HistoricBridges.org member who made them and do not necessarily represent the views of anyone else, including any outside photographers whose images may appear on the page in which the commentary appears. HistoricBridges.org does not bear any responsibility for any consequences resulting from the use of this or any other HistoricBridges.org information. Owners and users of bridges have the responsibility of correctly following all applicable laws, rules, and regulations, regardless of any HistoricBridges.org information.