Comment 6. Gravel is available by scraping in the high-water channel, 

 but precautions must be taken to avoid channel diversion. Refer to Scraping 

 Guidel ines (VI B 2). 



Comment 7. Mining is not recommended in or near the active channel of 

 small split channel rivers because there is not much material available. 



Comment 8. There generally is not much material available in these de- 

 posits and they should be avoided. If only a small amount (<I0,000 m ) of 

 gravel is needed, these deposits may be considered for scraping. Refer to 

 Scraping Guidelines ( iV B 2). 



Comment 9. Grave! is available by either pit or scrape methods. Generally 

 these should be considered for large amounts of gravel that are not present 

 in adequate amounts in exposed deposits. Pits should be considered when more 

 than 50,000 m are required. Refer to Scraping Guidelines (VI B 2) and Pit 

 Guidel ines (VI B 3) . 



Comment 10. Some gravel is available by scraping, but the general config- 

 uration of the channel should be maintained. Refer to Scraping Guidelines 

 (VI B 2). 



62 VI. SITE OPERATION 



