The power plant comprises the inlet structure in Mooserboden reservoir next to the Drossen Dam, the water works channel in the right flank of the valley, the surge tank, an armoured pressure shaft and the power plant cavern to the east of the old Limberg power plant. The tailrace channel runs from the power plant to the Wasserfallboden reservoir. The power plant can be accessed via a 6-km tunnel which begins shortly behind the valley station of the Kaprun glacial railway and connects Kaprun with the power plants Limberg and Limberg II.
The power plant is located in the large power plant cavern that is oriented roughly in a north-south direction with excavation dimensions of 62 x 25 m and a height of 43 m. The smaller transformer cavern is located approximately 35 m to the west. Both caverns are connected by tunnels in the centre and south and the access tunnel in the north.
The 62 x 25 x 43-m power plant cavern is divided into three levels. The turbine level with both Francis pump turbines and all of the hydraulic isolating equipment is in the lower area, the generators are in the middle area and the machine hall is in the upper area. The operating area for the process control technology, emergency base, sanitary rooms and the main staircase is located on the west side of the cavern. Two emergency stairs are located at the north and south ends of the cavern.
The 61 x 15 x 16-m transformer tavern, which was excavated at a distance of 30 m parallel to the machine cavern, accommodates the two 380-kV generator transformers. SFC transformers and KS inductors are located in a separate room between the generator transformers. A 16-kV and 400-V auxiliary plant is located at the north end of the access tunnel.
The Mooserboden inlet/outlet structure is situated between the Drossen and Mooser dams in the "Höhenburg", followed by the 32 x 19 x 22-m Höhenburg valve chamber, which can be accessed via a 581-m access tunnel from Turn 6 on Mooserbodenstraße. The immediate proximity to the existing surge tank of the upper stage of the power plant was taken advantage of when erecting the surge tank. It was designed as a two-chamber surge tank with an upper chamber, a 45° riser shaft and a flow-conducting lower chamber. The pressure shaft extends over a length of 577 m with an incline of 45° to the vertical bend which connects to a forked pipe for high-pressure distribution to both machine units. The 540-m tailrace channel runs from forked pipe on the downstream side to the Wasserfallboden inlet/outlet structure which is located in the right flank of the valley approximately 100 m to the waterside of Limberg Dam.