It seems that the difference between the 504 test sites identified in the UNSW Water Research Laboratory 211-page report on Clarence riverbank vulnerability and the 252 sites implied in the newspaper article raised some local eyebrows, but it was this paragraph which appeared to elevate the blood pressure of one particular reader who perhaps was remembering that the Clarence River is over 300 km long:
While the study found there were sections of the river in those areas where management of activities was warranted, the majority of the river was suitable for water skiing and wakeboarding for vessels making up to 150 passes of the river a day.
The irate reader himself also had trouble with the number of sections in the 37 km study area. Though to be fair it appears he may be using the locally recognised distinctions between stretches of the river between Rogan's Bridge and Ulmarra.
The study has a contentious history with Seelands residents - see here and here.
The Daily Examiner 5 January 2015:
I refer to the DEX article "Report finds wakeboarding 'generally suitable' on Clarence" (30/12).