Numbers (WGN) are listed, when known. WGN assigned numbers are coded,
such as 46-03-01. The first two numbers are the assigned State number
in alphabetical order. The second two numbers represent the county
number, also in alphabetical order. The third pair of characters
or numbers is the bridge number. All non authentic bridges, as well
as a few authentic bridges, are numbered with an alpha character in lieu
of the last two digits, i.e., 45-08-A (Vermont's Joe's Pond non authentic
Stringer Covered Bridge).
Covered Bridge (WGCB) numbers have been assigned by the National
Society for the Preservation of Covered Bridges (NSPCB) are
referenced for all listed bridges. Assigned numbers are coded, such
as NH-05-12 or VT-115-a. The first two characters are the postal
abbreviations for the state (formerly digits starting at 01 represented
the state in alphabetical order). The second two digits represents
the county in alphabetical order starting at 01 for each state. The
third pair of characters represents the bridges place in the NSPCB tally
of that county's bridges, starting at 01 for authentic truss type bridges
or a letter for non authentic type bridges, an upper case letter for motor
vehicle bridges, and a lower case letter for footbridges. Additionally,
bridges that have a leading "(" before the last letter, are considered
O.C.B.I. - "Of Covered Bridge Interest" - a Covered Bridge that is under
12' or is just on the ground and not over anything, i.e., 45-12-(b.
- General information. The first covered bridge to be
built in the United States was located on Market Street in Philadelphia,
Pennsylvania, and spanned the Schuylkill River. It was built in 1805.
It was quite a lengthy structure. Shortly thereafter, the second
covered span in America, a 1,008 foot giant that crossed the Delaware River
between Morrisville, Pennsylvania, and Trenton, New Jersey was built.
greatest period of bridge building activity took place from the 1820s to
the end of the nineteenth century. During this time period there were at
least 1,500 covered bridges built in a variety of sizes and truss designs.
Records show that at one time, all but three of Pennsylvania's sixty-seven
counties had covered bridges in use. Today, there are still forty
counties in which covered bridges still stand, Fortunately
interest in them has been growing and there are many people working to
preserve them. A small number have even been disassembled and placed
in storage until full restoration can be scheduled.
not only leads the nation as the birthplace of covered bridges, but it
has the largest number of covered bridges still standing. Of these,
151 still carry motorized vehicular traffic. Many of those not open
to vehicular traffic have been preserved in parks or on private property
and are still in use for two-legged and four-legged traffic.