The City of Tooele needed a new municipal well and had drilled a test well on one of their city properties. The well encountered dense quartzite bedrock at a depth of 740 feet. The area commonly has a water table near a depth of 700 feet below surface, so the well was abandoned. The City of Tooele hired Hydro to image the aquifer conditions on seven different city properties to identify which areas have saturated alluvium below 700 feet.
The project was located within the city. Cities have very strong electromagnetic energy within the air and ground due to power lines, metal structures and pipelines. Electromagnetic imaging systems can be greatly affected by the man-made power spectrum, often making it difficult to obtain usable information. Hydro’s Aqua Gem geophysical imaging system provides us with the best opportunity to filter outside influences to obtain the most reliable data.
Hydro applied extreme data filtering and calibration measures to obtain the best data possible. The resulting data accuracy was very high, resulting in successful drilling results.
The Hydro Geo-Science team reviewed the geophysical images on the seven properties and identified three properties which showed the potential for a deeper bedrock and more saturated alluvium than was found at the first test hole. Three new test holes were drilled on the recommended properties and found saturated alluvium with respective bedrock depths of 912 feet, 1,110 feet and 1,115 feet.
City of Tooele, Utah
KEY SERVICE(S) DELIVERED:
|WELL DEPTH:||912’, 1,110,’ 1,115’|
|TIME TO COMPLETION:||4 days to acquire data, 15 business days for Final Report|