Soil construction, foundation construction: Nuclear gauge setup and setup tools, for measuring density of soil. Soil is fresh fill behind a retaining wall that has just been compacted by a manually operated vibratory soil compactor, and the technician is measuring soil density. On left side is geo-fabric to contain soil fines and water, for water to drain out at base of wall through flexible corrugated plastic soil tubing. Huron Parkway, Ann Arbor, 2005. (Note: Non-nuclear gauges have made nuclear gauges obsolete. See Electrical Density Gauge and Geogauge at http://www.humboldtmfg.com, which won the Nova Award for construction innovation.)

Soil construction, foundation construction: Nuclear gauge setup and setup tools, for measuring density of soil. Soil is fresh fill behind a retaining wall that has just been compacted by a manually operated vibratory soil compactor, and the technician is measuring soil density. On left side is geo-fabric to contain soil fines and water, for water to drain out at base of wall through flexible corrugated plastic soil tubing. Huron Parkway, Ann Arbor, 2005. (Note: Non-nuclear gauges have made nuclear gauges obsolete. See Electrical Density Gauge and Geogauge at http://www.humboldtmfg.com, which won the Nova Award for construction innovation.)