A GIS-Enabled Approach for Assessing Damage Potential of Levee Systems Based on Underlying Geology and River Morphology

Table 6

Summary of available geotechnical investigation borehole logs and cone penetration tests (CPTs) in the study areas.

Area	URS boreholes					URS Historical	USACE	URS CPTs
	Borehole (B)	Hollow stem auger (A)	Hand auger (H)	Sonic core (S)	Piezometer (M)	Historical log	Borehole	CPT
West Sacramento	26	—	—	—	4	9^a	34	25
American River	10	—	—	—	6	27^a	—	—
Marysville	49	—	—	4	16	—	—	—
RD784	21	—	—	2	—	—	—	—
Feather North	10	14	5	—	—	—	—	19
Feather South	14	10^b	6	—	—	—	—	74
Total	267							118

aMany more available. These are a short list of historical boreholes used for this study.
^bOne borehole was “solid” and not “hollow” stem auger.