Assertion: aquifer | /r/HasProperty | below land surface
Facets:
value: in most of eastern colorado
type: LOCATION
Source sentences:
text: Structural mapping indicates the aquifers are 2,000 to 9,000 ft below land surface in most of eastern Colorado but outcrop in local areas in a narrow band along the Front Range of the Rocky Mountains.
text: As indicated by the widely spaced contours, the hydraulic gradient is much flatter in the Williston Basin where the aquifers are deeply buried and are as much as 10,000 feet below the land surface.