The 1829 Haverhill-Bath Covered Bridge is a historic covered bridge over the Ammonoosuc River joining Bath and Woodsville in Grafton County, New Hampshire.

Formerly used to carry New Hampshire Route 135, the bridge was idled in 1999. Restored in 2004, it is now open to foot traffic only. It is believed to be the oldest covered bridge in the state and is the first and only bridge to be erected at this site.

Located in the northwestern corner of the town of Haverhill, it connects the village of Woodsville to a rural area in the southwestern corner of Bath. In September of 1828, the town of Bath set aside $300 to purchase stone and timber for a bridge. In March 1829, Ariel Miner was given the position of superintendent, but upon his request in June of that year, he was released from this position and replaced by Moses Abbott and Leonard Walker. The bridge was completed later in 1829 with funding provided by both towns. The bridge is a Town lattice truss bridge with two spans, resting on stone and concrete abutments, and a stone pier. The roadbed is 256 ft. 8 inches long and 14 ft. 4 in. wide, and the roof is 277 ft. 8 in. long, covering not just the bridge but also framed entrances on both sides. There is a sidewalk (not part of the original construction) on the east (upstream) side of the bridge that is 6 ft. 1 in. wide. The roof on that side is extended over the sidewalk, giving the roof profile that of a saltbox house. The downstream side is finished in vertical board siding, with diamond openings spaced along its length and two larger rectangular openings near the ends.

The bridge has survived a number of flooding events, most notably in 1927 when the latticework was pierced by a tree trunk, and a barn was carried into the structure. In 1973 it was repaired at a cost of $38,710. Ice damaged the structure in the winter of 1980 and the bridge was repaired by the state in March of 1981 at a cost of $8,000. Someone unsuccessfully attempted to burn it on the night of September 11, 1983. It was renovated again in 2004. 

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 1977.

Located at:  N44 09.283    W72 02.187     -     WGCB #29-05-04

Photographed in July of 2019.