Fuldatalbrücke Solms, Railway bridge in Niederaula, Germany.

The Fuldatalbrücke Solms is a two-track railway bridge on the Hanover–Würzburg high-speed line, 1628 m long and the longest valley bridge on that route. Its deck is a chain of 37 simply supported prestressed concrete single-cell box girders, each with a 44 m span, 14.3 m width and constant 4.0 m depth. The track runs up to 29 m above the valley floor on piers 8 to 21 m high.

Built between November 1984 and 1988 as part of planning section 15 of the Hannover–Würzburg high-speed line, the bridge replaced a 1976 variant that foresaw a 2145 m span up to 35 m high. During construction a loop of the Fulda was temporarily diverted, and one short stretch in the bridge's path was permanently moved about 30 m east; the trench dug for the diversion now serves as a wetland biotope. The Bad Hersfeld road authority supervised construction under the Bundesbahngesetz.

The bridge's 37 piers were fitted with nesting cavities for kestrels at the suggestion of the state bird-protection agency. Because the ecological impact could not be offset near the route, a compensation area was established 5 km away in Mengshausen, designated a nature reserve on 1 December 1987; white storks later returned to Niederaula.

The structure can be observed from several vantage points in and around Niederaula. Regular train traffic provides good opportunities to see the bridge and appreciate its scale.

The deck is not a continuous beam but a chain of 37 single-span girders of 44 m each, so individual segments can later be replaced. On the proposal of the state bird protection station, the piers were fitted with nest cavities for kestrels.