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Hesselberg Hydro

Khabour Dam, Syria

This embankment dam in north-east Syria formed part of an irrigation project for the Ministry of Irrigation (RIMA). The upstream facing of the embankment was originally intended to be hand-placed stone pitching. Practical difficulties in achieving a satisfactory end product, together with a lack of suitable rock in the vicinity, lead RIMA to look at alternatives.

Initially, machine placed rip-rap was rejected because of the greater demand for rock, with attendant extraction and transport problems.

Hesselberg Hydro was contracted to investigate the suitability of local materials for an Open Stone Asphalt (OSA) upstream facing:

Our report for RIMA provided details of mix designs, together with proposals to train local operatives in installation and quality control routines.

With an overwhelming technical and economic case, the OSA installation was accepted by the consulting engineers. However, for political reasons beyond the control of Hesselberg Hydro, the rip-rap option prevailed.