Geography and Geology
Sutter's Fort is located on level ground at an elevation of approximately 20 feet (6.1 m) above mean sea datum. The slope elevation decreases northward toward the American River and westward toward the Sacramento River. Slope elevation gradually increases to the south and east, away from the rivers. All surface drainage flows toward the Sacramento River. Groundwater in the vicinity flows south-southwest toward the Sacramento Delta; however, after peak rainfall, because of a swollen Sacramento River, the groundwater flow can actually reverse and flow away from the river.
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