7 votes

Mallaham Bridge


Photo taken by janis Fordin September 2009

BH Photo #193042



The bridge is an example of "Morrison's Patent Wrought Iron Arch Truss Bridge," based on a patent granted David H. Morrison in 1867. Unique among bowstring arches, this design used vertically-oriented I-beam flanges to form the bow. Morrison, founder of the Columbia Bridge Works of Dayton, Ohio, was one of the most important bridge engineers and manufacturers in 19th century Ohio.

-- Historic American Engineering Record


Bowstring pony truss bridge over Riley Creek on Township Road M-6
Putnam County, Ohio
Open to traffic
Built 1876 by the D.H. Morrison
- Columbia Bridge Works of Dayton, Ohio
- D.H. & C.C. Morrison of Dayton, Ohio (Columbia Bridge Works)
Bowstring pony truss
Length of largest span: 80.1 ft.
Total length: 86.0 ft.
Deck width: 16.1 ft.
Eligible for the National Register of Historic Places
Also called
Township Road M-6 Bridge
Approximate latitude, longitude
+40.97833, -83.99167   (decimal degrees)
40°58'42" N, 83°59'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/248297/4540663 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2015)
Inventory numbers
ODOT 6932509 (Ohio Dept. of Transportation structure file number)
BH 28308 (Bridgehunter.com ID)
Inspection report (as of December 2018)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Very Good (8 out of 9)
Sufficiency rating: 28 (out of 100)
View more at BridgeReports.com

Update Log 

  • April 22, 2014: HAER photos posted by Nathan Holth
  • October 25, 2011: New photos from Brian McKee
  • January 31, 2011: New photos from Eric Root
  • March 9, 2009: Updated by Anthony Dillon


  • Tony Dillon - spansaver [at] hotmail [dot] com
  • Eric Root - ejort [at] att [dot] net
  • Janis Ford
  • Brian McKee - bjmckee51 [at] yahoo [dot] com
  • HAER OH-88 - Mallaham Bridge, County Route M-6 spanning Riley Creek, Pandora, Putnam County, OH


Mallaham Bridge
Posted March 5, 2020, by Art S. (asuckewer [at] knite [dot] com)


Welcome aboard and thank you for sharing!

I happen to be a fan of your wife's ancestor's companies and have been researching their work. I've been involved in rescuing one of the remaining bridges (its safe but not yet restored), as well as researching the companies' diverse products.

I and a number of others here have identified numerous long lost bridges as well as confirming an existing bridge as being by Columbia Bridge Works.

You may be interested in some of the finds:




Your first drawing is similar to the Mallaham bridge, one of two known survivors.

The second drawing is of a through truss bowstring. Similar to:


There are no known survivors.


Art S.

Mallaham Bridge
Posted March 5, 2020, by Steven K (sjkst14 [at] gmail [dot] com)

I came across this while researching Columbia Bridge Works, which my wife's family has relations to. We had a few prints framed that we acquired from her grandmother's estate several years back. I noticed the Wrought Iron Arch Truss prints were similar to this bridge. I just wanted to share pictures of these. The smaller one I have hanging in my office and measures about 2' x 2'. The larger one is at home, and not being in front of it right now, I am going to guess is about 2.5' x 4'. Enjoy.

Mallaham Bridge
Posted July 22, 2018, by Art S. (asuckewer [at] knite [dot] com)
Mallaham Bridge
Posted March 31, 2015, by ArtS (asuckewer [at] knite [dot] com)
Mallaham Bridge
Posted February 2, 2015, by ArtS (asuckewer [at] knite [dot] com)

Bid notice:

LEGAL NOTICE request for letter of interest for Engineering services Putnam County Bridge #M6-5.72 rehabilitation (Put-br m6-5.75, pid 98795) The Putnam County Engineer in Ottawa, Ohio is requesting Letters of Interest to provide Engineering Services for the Putnam County Bridge #M6+5.75 Rehabilitation & Historic Preservation Project. The Project consists of providing detailed Engineered Bridge Plans for the disassembly, cleaning, galvanizing and reassembly of an 86 foot Span Steel Bowstring Truss Bridge. Additional services include roadway design, right-of-way plan development and environmental activities. Estimated Construction Cost: $386,000.00 Required Prequalification, Combination of Prime and Subconsultants Current Registered Professional Engineer in the State of Ohio bridge Design- Level 2, Roadway Design-Non Complex, Right-of-way Plan Development-Limited environmental services-Environmental Document Preparation CE, Ecological Surveys,Waterway Permits ESA Screen Phase 1 & ESA Phase 2 Cost Accounting System-Unlimited (Prime Consultant Only) Selection Subfactors Past experience designing similar bridge projects. Firms included on the current Federal list of firms suspended or debarred are not eleigible for selection. Selection Procedures As required by Ohio Revised Code Section 153.65-71, responding firms will be evaluated and ranked base on the qualifications contained in their letter of interest. Following this evaluation, the Putnam County Engineer will enter into contract negotiations with the most highly qualified firm. Should you wish to be considered for this work, submit one (1) copy of your letter of interest, no later than 4:30 P.M., Local Time, on February 12, 2015. Letter of interests received after this deadline will not be considered. The requirements for the letter of interest are available upon request from the Putnam county Engineer, 245 East Main street, Ottawa, Ohio 45875 or via email from troy.recker@putnamcountyohio.gov. The preliminary project description is as follows: Name of Project: Putnam County Bridge #M6-5.75 Rehabilitation & Historic Preservation Project (PID 98795) Location: Bridge #M6-5.75 spans Riley creek, and is located on TR M-6, just East of TR 7-Lin Section 6 of Riley Township, Putnam County, Ohio. Description: The Project consists of providing detailed Engineering Bridge Plans for the disassembly, cleaning, galvanizing and reassembly of an 86 foot Span steel Bowstring Truss Bridge, including abutment repairs, approach and guardrail improvements. Additional services include roadway design, right-of-way plan development and all required environmental activities. Schedule: It is anticipated that the Selected Consultant will be authorized to proceed by March 1, 2015. Construction Completion Date is November 1, 2016. Putnam County Engineer

Mallaham Bridge
Posted September 30, 2014, by ArtS (asuckewer [at] knite [dot] com)

Funding has been approved!:

Historic bridge in county approved for grant work

By: Nancy Kline

Tuesday, September 30, 2014 8:53 AM

PANDORA — Work on a historic bridge in Putnam County is expected to start in the fall of 2016.

The Putnam County Engineers Office has been awarded funds from the Transportation Alternatives Program (TAP) for the Mallaham Bridge, that crosses over Riley Creek on M6, northwest of Pandora.

The total estimated construction cost for the work needed on the bridge is $ 386,000. The county has been awarded a $308,800 grant.

Troy Recker with the engineers office said the remainder of the funding will come from the local bridge fund.

Built in 1875 the bridge is eligible for the National Register of Historic Places as a rare example of bridge fabricator David Morrison’s 1871 patented design for bowstring truss bridges.

Read more about this bridge in this week's Putnam County Sentinel.


Mallaham Bridge
Posted April 18, 2014, by Tony Dillon (spansaver [at] hotmail [dot] com)

Hopefully the funding will be approved!

Mallaham Bridge
Posted April 18, 2014, by ArtS (asuckewer [at] knite [dot] com)

Sounds like they are going ahead with the restoration:


Mallaham Bridge
Posted April 11, 2014, by ArtS (asuckewer [at] knite [dot] com)
Mallaham Bridge
Posted September 16, 2009, by Anthony Dillon (spansaver [at] hotmail [dot] com)

The name most often comes from the landowner at the time it was build.

Mallaham Bridge
Posted March 10, 2009, by Rick McOmber (r [dot] mcomber [at] comcast [dot] net)

Thanks for the updated listing on this bridge. I visited this wonderful Columbia Bridge Works structure back in April of 2006 and included a photo I took. This bridge apart from the deck retains much of its original historic integrity. I hope the original guard rails are still on it.