We provide both electromagnetic (EM) and magnetotelluric (MT) geophysical methods to map, analyze, and validate subsurface resistivity features. These measurements are correlated and calibrated with geologic/hydrogeologic conditions such as existing well information, formation type, fractures, geologic structure, sand/clay/gravel layers, and water quality to provide the most accurate interpretation. Our team has refined our methodology for over 25 years, with proven results on hundreds of projects.

Key Features of our geophysical system include:

• Flexible survey size and design

• Map a range of hydrogeologic features

• Depth capability up to 3000+ ft

• Environmentally friendly, non-invasive technology

• Rapid data collection and processing

• 2-D and 3-D data presentation and analysis

• Multiple aquifer parameter analysis (i.e., aquifer quality, formation type, depth, fractures, water quality, relative yield)

• Cost-effective Phase I investigation tool

Our experienced team of groundwater professionals brings a comprehensive, problem solving approach to every groundwater challenge. With a deep understanding of local geology and industry best practices, we provide reliable, actionable insights that empower informed decision-making, mitigate risk, and drive project success.

An understanding of the subsurface is highly beneficial for water resource planning, municipal water supply, mining operations, industrial construction and supply, geothermal operations, oil and gas water supply, and property development.

Rockfish’s hydrogeologic services are available to partner with our clients and increase project success, including:

Desktop Study

• Professional geoscientists compile, analyze, and evaluate available subsurface information surrounding your project location, including aquifer characteristics, existing well information, water quality, geophysics, and reports. We obtain existing information, evaluate it for usefulness, and present it in a clear and actionable manner. This is a cost-effective tool to support projects in the initial planning phase.

Rockfish provides hydrogeologic services to support drilling operations including:

• Desktop study/Hydrogeologic Research

• Well-site lithologic/formation logging

• Geophysical log evaluation

• Aquifer-test analysis with transmissivity

• Well construction recommendations (gravel pack and screen slot size)

• Degree of development

• Well efficiency analysis

• Water quality report analysis

• Radius of Influence (ROI)/Cone of depression analysis

• Cross-section mapping

• Contour map creation

• Hydrogeological Report for Groundwater Conservation District permitting