Bridge Types By Decade
Some discrepancy in dates may be observed in the chart. This occurs when a bridge type associated with an earlier period, such as a pinned pony truss, appears to be built at a much later date. ODOT records sometimes shows a relocation date rather than a date of original manufacture. Research determined the construction date of some relocated spans and that information is reflected in the chart.
|
|
Pony Trusses
Bridge Types |
1890-1899 |
1900-1909 |
1910-1919 |
1920-1929 |
1930-1939 |
1940-1949 |
1950+ |
TOTAL |
Pratt |
|
16 |
41 |
36 |
24 |
11 |
5 |
133 |
Pratt Half-Hip |
|
15 |
42 |
34 |
22 |
9 |
7 |
129 |
Warren w/verticals |
|
32 |
137 |
212 |
107 |
65 |
11 |
564 |
Warren w/polygonal top chord |
|
2 |
8 |
|
2 |
2 |
|
14 |
Double Intersection Warren |
|
1 |
|
|
|
|
|
1 |
Parker |
|
|
3 |
|
2 |
1 |
|
6 |
Camel Back |
|
|
5 |
23 |
102 |
34 |
9 |
173 |
King Post |
|
|
|
1 |
|
|
|
1 |
Pratt, small 3-panel |
|
9 |
11 |
9 |
4 |
2 |
|
35 |
Truss leg bedstead |
|
11 |
23 |
14 |
10 |
3 |
1 |
62 |
Warren bedstead |
|
|
8 |
1 |
2 |
1 |
|
12 |
Other, Pony |
|
|
1 |
1 |
|
|
|
2 |
Subtotal |
|
86 |
279 |
331 |
275 |
128 |
33 |
1132 |
|
|
Through Trusses
Bridge Types |
1890-1899 |
1900-1909 |
1910-1919 |
1920-1929 |
1930-1939 |
1940-1949 |
1950+ |
TOTAL |
Pratt |
|
11 |
27 |
29 |
15 |
5 |
|
87 |
Pratt, modified |
|
|
1 |
23 |
12 |
7 |
2 |
45 |
Parker, modified |
|
|
|
2 |
1 |
2 |
|
5 |
Warren |
1 |
|
|
|
|
|
|
1 |
Warren w/verticals |
|
|
|
|
|
1 |
|
1 |
Double Intersection Warren |
|
|
2 |
|
|
|
|
2 |
K-Truss |
|
|
|
|
19 |
5 |
2 |
26 |
Parker |
|
4 |
14 |
12 |
8 |
8 |
2 |
48 |
Camel Back |
|
1 |
|
|
|
|
|
1 |
Subdivided Warren |
|
1 |
|
|
|
|
|
1 |
Subtotal |
1 |
17 |
44 |
66 |
55 |
28 |
6 |
217 |
|
|
Deck and Mixed Trusses
Bridge Types |
1890-1899 |
1900-1909 |
1910-1919 |
1920-1929 |
1930-1939 |
1940-1949 |
1950+ |
TOTAL |
Deck Trusses |
|
|
|
2 |
5 |
1 |
1 |
9 |
Mixed Trusses |
|
7 |
8 |
15 |
28 |
15 |
13 |
86 |
|
|
Masonary
Bridge Types |
1890-1899 |
1900-1909 |
1910-1919 |
1920-1929 |
1930-1939 |
1940-1949 |
1950+ |
TOTAL |
Concrete Arch |
|
2 |
28 |
21 |
29 |
9 |
2 |
91 |
Rainbow Arch |
|
|
1 |
|
|
|
|
1 |
Other, concrete |
|
|
1 |
|
1 |
|
|
2 |
Stone Arch |
|
|
5 |
1 |
9 |
1 |
1 |
17 |
Subtotal |
|
2 |
35 |
22 |
39 |
10 |
3 |
111 |
|
|
|
1890-1899 |
1900-1909 |
1910-1919 |
1920-1929 |
1930-1939 |
1940-1949 |
1950+ |
TOTAL |
Grand Total |
1 |
112 |
366 |
436 |
402 |
182 |
56 |
1555 |
|
|