Metal truss
bridges were most frequently erected in Iowa between about 1895 and
1910. The Pratt truss bridge design was originally patented by
Thomas and Caleb Pratt of Boston in 1844. In its earliest form, the
Pratt truss was a combination wood and iron truss. The top chord
and verticals acted in compression and were made of wood, while the
bottom chord and inclined members acted in tension and were made of
iron. A Pratt truss bridge can be recognized by its vertical
members and diagonals that slope down towards the center. This
combination Pratt truss was built in the early 1900's and
originally spanned Old Mans Creek near Iowa City.
Beautiful F.W.
Kent Park comprises 1,082 acres with over 9 miles of trails,
and 7 old-time county-road bridges that have been relocated for
crossing different parts of the lake and ponds there. Enjoy the
park and be sure to visit its other not too far bridges
too.
A trail map is available at link listed
below.
http://www.johnson-county.com/conservation/pdf/KentParkMap.pdf
Take care
finding this one and in replacing it as
found.
This
cache was placed with the permission given by the Johnson County
Conservation Board.