Heaving-Bedrock Hazards, Mitigation,
and Land-Use Policy:
Front Range Piedmont, Colorado

DAVID C. NOE
Colorado Geological Survey, 1313 Sherman Street, Room 715, Denver, CO 80203


FIGURE 9: This trench has exposed dipping beds of bentonite (dark layers) at a high school site. Earlier drillhole surveys had not encountered the bentonite. The foundation design for the school was subsequently changed from a drilled-pier system to an overexcavation design.

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NOTE: This information is provided for general education only. For detailed information concerning reactive soils, you should always contact a geo-technical firm.




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