The city of Kaiserslautern made land available for the proposed line. The connection between Kaiserslautern and Enkenbach was opened on 15 May 1875. The line included the stations of Kaiserslautern Nord and Eselsfürth. Alsenz Valley Railway was operated by the Palatine Northern Railway Company ("Gesellschaft der Pfälzischen Nordbahnen") and functioned as its main line. The Bad Münster–Enkenbach section was frequented by the 1920s by long-distance trains on the Cologne–Bingen–Neustadt–Landau–Wissembourg–Strasbourg route. However, after Alsace was ceded to France after the First World War, the line lost much of its traffic towards Neustadt. Since the Enkenbach–Eselsfürth–Kaiserslautern route is shorter than the route via Hochspeyer, most trains approach Kaiserslautern via Eselsfürth. After the Zeller Valley Railway ("Zellertalbahn") was completed from Langmeil to Monsheim) in 1873 and the Donnersberg Railway ("Donnersbergbahn") was completed from Alzey to Marnheim in 1874, the section between Kaiserslautern and Langmeil also carried long-distance trains to the Rhine-Main area via Worms to Frankfurt or via Alzey to Mainz. The Eis Valley Railway ("Eistalbahn") was opened in 1876 from Grünstadt to Eisenberg and connected to Enkenbach in 1932. Some of its services connected with Kaiserslautern. In 1942, during the Second World War, a major accident occurred on the line: in the morning a military train and a freight train collided with each other in Enkenbach. The incident killed two people and wounded many others. A greater tragedy was avoided because the first two carriages of the military train were only lightly occupied. After the Second World War, several intermediate stops (Neuhemsbach, Dielkirchen, Bayerfeld-Colln, Mannweiler, Ebernburg) were abandoned due to low patronage. After all the connecting lines, the Eis Valley Railway, the Zeller Valley Railway and the Donnersberg Railway, had been closed for passenger services between 1983 and 1994, the Alsenz Valley Railway was the only line that was in full operation in the Donnersbergkreis.