Hs004

Attribute: SUBSTRATE18

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)