Measure the earth response
The Wenner array measures apparent soil electrical resistivity for a documented location, equal electrode spacing, orientation, and field condition.
260 regional and city project guides
Wenner four-pin soil resistivity testing across the United States
Calicore performs in-situ soil electrical resistivity surveys for grounding studies, substations, solar and battery facilities, wind farms, transmission, utilities, data centers, pipelines, and corrosion evaluations.
Vary spacing deliberately
A spacing sequence samples progressively larger earth volumes. The required range comes from the project model, site dimensions, layering, and available clear line length.
Mobilize by project scope
Nationwide pricing accounts for station count, maximum spacing, access, utility clearance, terrain, security, work windows, travel, and deliverables.
Why regional guides?
Regional ground conditions guide the survey plan—not the answer.
U.S. project markets differ in precipitation, seasonal drying, frost, groundwater, surficial geology, terrain, fill history, infrastructure density, and the amount of straight, undisturbed ground available for an array. Those differences affect station coverage, access, orientation, maximum spacing, interference, and timing.
They do not justify a published “typical soil resistivity” for an entire city. Each result must remain tied to the actual location, line, spacing, measured resistance, calculation, units, surface condition, and limitations.
107
Metro guides
Broad regional planning for major U.S. infrastructure markets.
153
City guides
More focused context for industrial, utility, technology, renewable, port, transportation, and public-infrastructure markets.
Browse the city directoryRegional directory
Find a metro Wenner testing guide
Each guide explains the regional setting, field method, likely applications, station and spacing plan, site responsibilities, deliverables, limitations, and technical starting points.
Alaska1 metro
Appalachian Plateau1 metro
Arizona2 metros
Arkansas River Valley1 metro
Capital Region1 metro
Carolinas Piedmont1 metro
Central Alabama1 metro
Central Coast2 metros
Central Florida1 metro
Central Florida I-4 Corridor1 metro
Central Maryland1 metro
Central Midwest1 metro
Central Ohio1 metro
Central Plains2 metros
Central Texas4 metros
Central Valley4 metros
Central Virginia1 metro
Chihuahuan Desert1 metro
Coastal Virginia1 metro
Connecticut River Valley2 metros
Delaware Valley1 metro
East Central Florida1 metro
East Tennessee1 metro
Florida Gulf Coast1 metro
Florida Space Coast1 metro
Florida Treasure Coast1 metro
Front Range3 metros
Georgia and South Carolina Coast1 metro
Georgia Piedmont1 metro
Great Lakes6 metros
Hawaii1 metro
Inland Northwest1 metro
Intermountain West1 metro
Lower Mississippi1 metro
Lower Mississippi and Gulf Coast1 metro
Lower Rio Grande Valley1 metro
Mid-South1 metro
Middle Tennessee1 metro
Mississippi River Valley1 metro
Missouri River Valley1 metro
National Capital Region1 metro
New England1 metro
New Mexico1 metro
New York Metropolitan Area1 metro
North Bay1 metro
North Carolina Piedmont1 metro
North Texas1 metro
Northeast Florida1 metro
Northeast Ohio1 metro
Northern California3 metros
Northern Delaware1 metro
Northern Nevada1 metro
Ohio River Valley2 metros
Pacific Northwest2 metros
Permian Basin1 metro
Research Triangle1 metro
South Carolina Lowcountry1 metro
South Carolina Midlands1 metro
South Carolina Upstate1 metro
South Florida1 metro
Southern California3 metros
Southern California Coast1 metro
Southern Nevada1 metro
Southern New England1 metro
Southern Plains3 metros
Southern San Joaquin Valley1 metro
Southwest Florida1 metro
Susquehanna Valley1 metro
Tennessee Valley1 metro
Texas Gulf Coast2 metros
Texas High Plains1 metro
Upper Midwest2 metros
Upper Texas Gulf Coast1 metro
Wasatch Front2 metros
West Central Florida1 metro
Western Lake Erie1 metro
Western Michigan1 metro
Willamette Valley2 metros
Nationwide field work
Questions before mobilization
Does Calicore travel nationwide for Wenner testing?+
Yes. Field programs are accepted throughout the United States when the technical scope, station count, spacing, access, schedule, and mobilization are practical.
What do you need to price a survey?+
Send the location and site plan, intended design or investigation use, requested stations and spacings, line-length constraints, utility-clearance responsibility, construction stage, site access, safety requirements, schedule, and required report.
Can one reading represent an entire solar farm or substation?+
Not automatically. Station coverage should reflect site size, grading, mapped or observed ground changes, electrical layout, fill zones, route segments, and the receiving engineer's model.
Is soil resistivity the same as corrosion rate?+
No. Soil electrical resistivity is one environmental property. Corrosion behavior also depends on material, moisture, chemistry, aeration, drainage, coatings, electrical continuity, and other exposure conditions.
Start with the receiving engineer
Plan the stations, spacings, and site access before travel.
Send the request, drawings, site location, station matrix, access and utility-clearance details, schedule, and required output. If the scope is still open, Calicore can help make it field-ready.
Request a proposal