U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Bridges & Structures

 

Drilled Shaft Rock Core Log

Type of Core Tool   Reference Elev.  
Core Tool Length   Rod + Tool  
Mas. Sample Length   Length Above  
Core Sample Diam.   Top of Core  
Length of Core Run (LR)      
Length of Recovery (SR)   % Rec. (SR/LR)x100% = (_____/_____)x100% =  
Σ Sample Length > 4(L4)   RQD (L4/LR)x100% = (_____/_____)x100% =  
Notes
 
 

Sample Recovery Depth Elevation RPM Time Rock Description & Notes
Rock Core Graph          
         
         
         
         
         
         
         
         
         
         
         
         

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Updated: 06/29/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000