• At sites to be opened during winter, all work area locations 

 (such as active channels, buffer locations, vegetated areas, 

 and gravel deposits) should be surveyed from reference points 

 established during the initial open-water site visit (Figure 

 3). Reference points should be selected so they can be found 

 in heavy snow cover during future site preparation. Establish- 

 ment of these surveys will reduce accidental damage to active 

 channels and buffer zones. 



Do a summer travers 

 or stadia survey to, 

 locate material site/ 

 boundaries 



Material site 

 boundary 



-Three or more temporary 

 bench marks which can 

 be located during winter 



Figure 3. Schematic diagram showing recommended survey at sites 

 which are to be opened during winter. 



5. If winter active-channel mining is contemplated, an additional site 

 visit should be conducted during winter. This visit is to determine 

 the presence of water at or downstream from the proposed site. 



II. SITE PLANNING 



