FM2-4
Iowa Geological Survey
Located in Mitchell County, Iowa, this groundwater monitoring location is associated with a water well in the Silurian-Devonian aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.8-49.0 ft | 5.5 in diameter steel casing | |
| 0.0-278.0 ft | 1.5 in diameter pvc casing | |
| 278.0-348.0 ft | 1.5 in diameter slotted pvc casing |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-5.0 ft | Quaternary | No Color Noted soil or fill |
| 5.0-37.0 ft | Quaternary | Gray till |
| 37.0-43.0 ft | Quaternary;Devonian-Lithograph City | No Color Noted sand and gravel |
| 43.0-53.0 ft | Devonian-Lithograph City | Brown limestone and shale |
| 53.0-60.0 ft | Devonian-Lithograph City | Gray limestone |
| 60.0-68.0 ft | Devonian-Lithograph City | Brown/Yellowish limestone |
| 68.0-79.0 ft | Devonian-Lithograph City/Coralville | Brown/Greenish limestone |
| 79.0-83.0 ft | Devonian-Coralville | Green limestone |
| 83.0-91.0 ft | Devonian-Coralville | Brown limestone |
| 91.0-93.0 ft | Devonian-Coralville | Green shale |
| 93.0-113.0 ft | Devonian-Coralville | Gray limestone and shale |
| 113.0-120.0 ft | Devonian-Coralville | Brown limestone |
| 120.0-138.0 ft | Devonian-Coralville/Little Cedar | Brown limestone |
| 138.0-143.0 ft | Devonian-Little Cedar | Gray shale |
| 143.0-151.0 ft | Devonian-Little Cedar | Brown limestone |
| 151.0-161.0 ft | Devonian-Little Cedar | Brown dolomite |
| 161.0-163.0 ft | Devonian-Little Cedar | Gray dolomite |
| 163.0-185.0 ft | Devonian-Little Cedar | Green shale |
| 185.0-193.0 ft | Devonian-Little Cedar | Brown dolomite |
| 193.0-243.0 ft | Devonian-Little Cedar | Gray dolomite |
| 243.0-246.0 ft | Devonian-Little Cedar | Brown/Grayish limestone |
| 246.0-259.0 ft | Devonian-Little Cedar/Pinicon Ridge | Brown limestone |
| 259.0-264.0 ft | Devonian-Pinicon Ridge | Brown dolomite |
| 264.0-279.0 ft | Devonian-Pinicon Ridge | Gray shale |
| 279.0-303.0 ft | Devonian-Pinicon Ridge/Spillville | Brown dolomite |
| 303.0-333.0 ft | Devonian-Spillville | Gray dolomite |
| 333.0-341.0 ft | Devonian-Spillville | Gray dolomite |
| 341.0-348.0 ft | Devonian-Spillville | Green dolomite |
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Agency Iowa Geological Survey Site Name FM2-4 Site Number 56985 Site Type WELL Lat/Long (WGS84) 43.3772, -92.8119 Well Depth 348 Feet Elevation (NAVD88) 1209.0 ft Latitude 43.37724 Longitude -92.81185 Local Aquifer Name Lower Devonian (None) National Aquifer Name Silurian-Devonian aquifers (N400SLRDVN) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 26.81 18.47 10.04 1992-08-04 2025-03-12 90 32.6 22.59 Statistics Calculated 2025-04-22 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record -
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