SUMMARY AND CONCLUSIONS 



Few changes in water quality parameters were measured that could be 

 attributed to gravel removal; most of the observed changes were within the 

 range of that expected by natural variation. The major reason for a lack 

 of measurable effects was the age of the sites, as most were visited several 

 years after mining had ceased. The few changes that were observed were 

 related to physical changes in the rivers, generally due to a reduction in 

 velocity and spreading of flow. 



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