Bridge Dimensions
The following table is a comparison of published measurements of length, width and load recorded in different sources using different methods, as well as the name or names cited. NBI measures bridge length between the "backwalls of abutments" or pavement grooves and the roadway width as "the most restrictive minimum distance between curbs or rails". The NRHP form was prepared by the Pennsylvania Historical and Museum Commission, which surveyed county engineers, historical and covered bridge societies, and others for all the covered bridges in the commonwealth. The Evans visited every covered bridge in Pennsylvania in 2001 and measured each bridge's length (portal to portal) and width (at the portal) for their book. The article uses primarily the NBI and NRHP data, as they are national programs.
| Length feet (m) |
Width feet (m) |
Load short tons (MT) |
Source (Year) |
|---|---|---|---|
| 78 feet (23.8 m) | 13.7 feet (4.2 m) | 5.9 short tons (5.4 t) | NBI (2008) |
| 78 feet (23.8 m) | 15 feet (4.6 m) | 3 short tons (2.7 t) | NRHP (1979) |
| 85 feet 11 inches (26.2 m) | 15 feet 1 inch (4.6 m) | NA | Evans (2001) |
| 78 feet (23.8 m) | 15 feet (4.6 m) | NA | Zacher (1986) |
Read more about this topic: Waterford Covered Bridge
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