The Dalton Covered Bridge is a historic covered bridge that carries Joppa Road over the Warner River in Warner, New Hampshire.

Its name refers to a nearby resident (first "Mrs. Dalton", then "Widow Dalton") at the time of its construction. The bridge was built in 1853 by Joshua Sanborn, and its original abutments were built by George Sawyer and Webster Davis; all were local residents. The bridge has a span of 76 feet, with a total bridge length (including portals and roof) of 84 feet. The bridge is 17 feet wide, with a roadbed width of 14 feet, although guard rails have reduced its usable width to just under 13 feet. Repairs were made to the bridge in 1871 at a cost of $134.81. In 1990, the state repaired the diagonal and the portal and installed a new metal roof.

The bridge uses a combination of truss types to support the load, following a patent issued in 1837 to Stephen Long, who also patented the Long truss. Its primary support mechanism is a king post truss, in which a vertical post is joined to chord members by iron bolts. This primary support is supplemented by a queen post truss system that flanks the king truss walls. The trusses are mounted on abutments that are primarily fieldstone but were capped in concrete in the 20th century. The mounting is secured by iron tension rods. The exterior walls of the bridge are vertical boarding with four windows; this finish was also rehabilitated in the 1960s. The gabled roof is made of corrugated metal.

There has been some debate as to the classification of the truss system. The Warner Historical Society in its 1974 publication, Warner N.H. 1880-1974, classified the bridge as a Haupt-type truss. the New Hampshire Department of Transportation indicates a classification of multiple Kingpost with an auxiliary Queenpost system. However, based on the National Register of Historic Places nomination form, it would appear to be classified as a Long truss with an auxiliary queen-post system. This is one of the oldest standing covered bridges in use today. It is also known as the Joppa Road Bridge. The bridge was rebuilt in 1963-1964. The rebuilding costs were shared by the town and the state.

Of the 400 covered bridges that once stood in the state of New Hampshire, as of 2019 only 54 remain.

The bridge was listed on the National Register of Historic Places in 1976.

Located at:  N43 16.608    W71 48.679     -     WGCB #29-07-05 

Photographed in July of 2019.