The only twin covered bridges in the United States built in the 1800's by W.C. Pennington for $720.00 and named after John Paden who operated a nearby sawmill. The East Paden bridge is a 72' Queen truss and the West Paden bridge is a 121' Burr Truss. The bridges are now located in Twin Bridges County Park.  Photo by: Ralph E. Menne

 Knecht's Bridge is in Bucks County, Penna. It is one of more than 200 covered bridges in the State.photo by: Thomas E. Walczak

Kidd's Mill Covered Bridge was built in 1868 over the Shenango River in Mercer County. To save this bridge a highway was built 'beside' it. Photo by: B.Blayney 4/98
 
 

Barronvale Covered Bridge in Somerset County Pennsylvania.  This two span bridge is about 162 feet and was built in 1902.  It is a Burr arch construction.  This photo was taken by Thomas E. Walczak.

Otter Creek Bridge in Ripley County Indiana, built in 1880. The photographer is David Davis.

 
 

Dr. Knisley Covered Bridge built in 1867 with the low sidewalls that illustrate Burr truss construction. This bridge is in Bedford County and crosses Dunnings Creek near Route 96 in West Clair Township. This photo was taken by Lynn R. Whetzel.

Hillsgrove Covered Bridge sits in Sullivan County Pennsylvania.  One of three remaining bridges in the County.  The photo was adapted from one taken by Charles W. Probst.

 
 

Ryot Bridge in Bedford County also.  This one was built in 1868 in Clair Township. The photographer was  John S. Cuddy.

Here are some links I found on covered bridges:

        West Michigan Tourist Assoc.

  Columbia County - PA Covered Bridges

  Wm. King A guide to old covered bridges of southeastern PA and nearby areas.

This excellent book is available from Country Books, click on the book for a link to their page.