Fenwick Island
Delaware Geological Survey
Located in Sussex County, Delaware, this groundwater monitoring location is associated with a water well in the Northern Atlantic Coastal Plain aquifer system.
Well Construction
| Depth | Description | |
|---|---|---|
| -1.85--380.0 ft | 2.0 in diameter pvc casing | |
| 380.0-420.0 ft | 2.0 in diameter pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-15.0 ft | sand; trace: shell, silt | sand; trace: shell, silt |
| 15.0-35.0 ft | sand; silty, lithologic information does not exist for this well in the database. code Qtz of type s_mat not found.; trace: medium sand, rock fragments | sand; silty, lithologic information does not exist for this well in the database. code Qtz of type s_mat not found.; trace: medium sand, rock fragments |
| 35.0-55.0 ft | silt; fine to very fine sandy; trace: gravel, coarse sand | silt; fine to very fine sandy; trace: gravel, coarse sand |
| 55.0-65.0 ft | sand; silty, medium slightly sandy; trace: gravel | sand; silty, medium slightly sandy; trace: gravel |
| 65.0-145.0 ft | sand; slightly silty; trace: gravel | sand; slightly silty; trace: gravel |
| 145.0-150.0 ft | silt; trace: fine to coarse sand, gravel | silt; trace: fine to coarse sand, gravel |
| 150.0-260.0 ft | sand; silty, lithologic information does not exist for this well in the database. code Qtz of type s_mat not found.; trace: medium sand, rock fragments; very thick (> 1m) interbed: sand, silt | sand; silty, lithologic information does not exist for this well in the database. code Qtz of type s_mat not found.; trace: medium sand, rock fragments; very thick (> 1m) interbed: sand, silt |
| 260.0-300.0 ft | sand, silt; trace: wood, rock fragments | sand, silt; trace: wood, rock fragments |
| 300.0-350.0 ft | sand; slightly silty; trace: rock fragments | sand; slightly silty; trace: rock fragments |
| 350.0-360.0 ft | silt; fine to very fine slightly sandy | silt; fine to very fine slightly sandy |
| 360.0-420.0 ft | sand, fine to medium sand; slightly silty; trace: coarse sand, gravel, wood | sand, fine to medium sand; slightly silty; trace: coarse sand, gravel, wood |
| 420.0-430.0 ft | sand | sand |
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Agency Delaware Geological Survey Site Name Fenwick Island Site Number Rj22-16 Site Type WELL Lat/Long (NAD83) 38.4723, -75.0522 Well Depth 420 Feet Elevation (NAVD88) 6.78 ft Latitude 38.472257735 Longitude -75.052207171 Local Aquifer Name Manokin (None) National Aquifer Name Northern Atlantic Coastal Plain aquifer system (S100NATLCP) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Known Changes 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 12.25 1.40 -2.67 2000-10-18 2025-10-29 6378 25.0 2.73 48.1 Statistics Calculated 2025-11-01 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 Jan 2.54 2.02 0.55 -0.1 -0.55 -0.76 -1.11 25 25 Feb 3.57 1.0 0.1 -0.44 -0.82 -1.06 -1.48 24 24 Mar 1.40 1.19 0.0 -0.53 -1.15 -1.50 -1.64 23 23 Apr 3.28 1.64 -0.30 -0.78 -1.12 -1.44 -2.65 25 25 May 6.01 4.67 0.33 -0.1 -0.42 -0.62 -0.72 23 23 Jun 8.89 6.26 5.48 4.28 3.35 2.76 1.57 23 23 Jul 10.95 9.63 8.40 7.84 7.01 5.83 5.13 25 25 Aug 12.25 10.3 9.30 8.74 7.91 7.38 6.84 23 23 Sep 9.10 8.84 7.97 6.85 5.78 4.90 3.38 23 23 Oct 8.82 5.53 4.08 2.78 2.25 1.75 0.65 26 26 Nov 3.04 2.29 1.66 1.38 0.76 0.30 0.08 20 20 Dec 2.64 2.1 0.94 0.49 0.0 -0.31 -1.21 20 20 Statistics Calculated 2025-11-01 -
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