Haselstein reservoir is a component of KELAG’s Fragant Group of hydropower facilities. Haselstein serves as an intermediate elevation daily storage pumping reservoir with a maximum depth and operating capacity of about 18 m and 40,000 m3, respectively. It is situated at an elevation of about 1470 m on a moderately steep hillside within a deep-seated landslide deposit which caused deformations on the surface.

The reservoir has an asphaltic concrete lining whose actual shape and condition should be assessed and measured using the JointMetriX3D system aiming to plan future refurbishment measures.

Using existing reference points from geodetic measurements done earlier the JointMetriX3D results were transformed into the national co-ordinate system.

Using the JMX Analyst software any arbitrary position on the surface can be determined (x, y, z) co-ordinates, as well as the extension of areas to refurbish in square-metres. Furthermore the JointMetriX3D results represent a comprehensive documentation of the actual conditions (conservation of evidence) and it allows the determination of zones were deformation occurred if applied repeatedly.

The whole data acquisition process can be performed trouble-free within one day.