The structure comprises approximately 902m rock amoured 1:2 sloping revetment with horizontal crest and toe berm. Since the start of construction the contractor was faced with a number of challenges of which were impacting the planned completion date. After exploring a lot of options without any success to increase the yield at the quarry, a proposal was initiated by the contractor to alter the current design based on design criteria. The new design was test in the 2D flume and proved to be stable. However, sourcing the prescribed rock sizes remained a challenge.