Nevertheless, none of the alternatives considered for the railway would have given a connection to Staufen (because of the hilly terrain around the Schlossberg) and to Sulzburg (because of its location in a valley of the Black Forest).

Ultimately, it was decided to build a standard gauge branch line on the route that had already been chosen.

In February 1895, the line was added to the list of those to which the Convention concerning International Carriage by Rail would apply.

[3] The operation developed very favourably until the end of World War I; revenues were higher than were initially estimated.

On 31 March 1901, the DEBG took over the concession along with the Kander Valley Railway and the joint workshop in Sulzburg for the price of 967,000 marks.

Finally the DEBG was issued with a concession to build a branch line between Staufen and Untermünstertal on 30 July 1913.

Untermünstertal station is reached on an approximately three metre-high embankment and the end of the line lies in a cutting that is nearly seven metres-deep.

Following the insolvency of the last rail-connected industrial establishment in Grunern, operations on the remaining section were closed in 1996.

[9] On 23 July 2012, the Regional Council approved the electrification of the railway line and related work for an estimated cost of €14 million.

[10] In early 2013, it became known that the electric railcars could not run at 80 km/h, but only at 60 km/h as state funds had not been authorised to upgrade the level crossings.

On 21 September 2013, the state minister of transport, Winfried Hermann officially inaugurated electrified operations using the 15 kV AC catenary, which had been completed on 15 July 2013.

Individual services are operated by Deutsche Bahn via Norsingen, Schallstadt, Ebringen, Freiburg-St. Georgen to Freiburg Hauptbahnhof, reversing in Bad Krozingen.

The class NE 81 diesel multiple units that had been used on the Münstertal line from the early eighties were replaced in the 1990s by Regio-Shuttles.

Since the delivery of two new electric vehicles of the Bombardier Talent 2 class (ET 150 and 151)[14] was delayed from June to September, substitute Regioshuttles were hired from Ostdeutschen Eisenbahn-Gesellschaft (ODEG).