Hickory Log Creek Dam

Geocomp Corporation is installing instruments at the Hickory Log Creek Dam in Canton, Georgia for Thalle Construction. The dam will be about 950 feet wide and 180 feet high, making it one of the largest roller-compacted concrete dams authorized by the Georgia Safe Dams Program. The lake will be about 370 acres in size; the reservoir will hold over 5 billion gallons of drinking water; and as much as 44 million gallons of water per day may be withdrawn. It is designed by Schnabel Engineering and Brown & Caldwell for the City of Canton (GA) and the Cobb County-Marietta Water Authority. Geocomp is installing: 18 vibrating wire piezometers, 5 Casagrande-type piezometers, 3 inclinometers, 56 thermisters in seven different lifts, 19 survey monuments, 2 wiers, 4 observation wells, and a staff gage. The instruments are routed to two locations within the drainage gallery and within adit tunnels inside the dam. Instruments may be read manually or may be read by an optional sensor-to-screen technology using iSite data loggers to iSiteCentral.com.

Monitoring will take place during the reservoir-filling stage and will continue for two years after. Geocomp is proposing, after project completion, to provide continuous monitoring of the dam with a call-alert system that will automatically notify authorities of potential issues. The construction of the dam is projected to be finished by the later part of 2007, and the filling of the lake is expected to be completed by 2009. Installation of pre-cast panels and roller-compacted concrete