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HS004

Attribute: SUBSTRATE20

code  description    
B    Basin     
BG    Bridge     
BI    Basin island     
BL    Boulder     
BN    Bank (WS#3 after 1996 only)     
BR    Bedrock (early use only)     
C    Channel (WS3 early use only)     
CB    Cement bottom (WS9 only)     
CR    Channel - unknown code (WS3 early use only)     
CS    Cement slope (WS9 only)     
D    Delta (deposit in basin)     
DM    Dam (early use only)     
DV    Diversion structure (WS#3 only)     
FL    Flume or concrete spillway     
FS    Fine sediment     
G    Gravel     
N    Not surveyed     
OB    Out of basin     
OD    Organic debris     
OM    Organic matter (early use only)     
P    Peninsula     
R    Rock (early use only)     
RD    Road (early use only)     
RP    Ramp (WS1, early use only)     
S    Slope     
ST    Stream     
TD    Top of dam     
TW    Top of wall (early use only)