| Prairie Island Observation Well PI98-09 |
| County: |
Goodhue |
| Township: |
Welch (T114N R16W) |
| Location: |
0.2 miles southwest of Prairie Island Boulevard, 3.5 miles
southeast if the intersection of Co. Rd. 68 and Co. Rd. 54 |
| Land-surface elevation: |
681.82 feet, NAVD88 |
| Installation: |
May 6, 2014, By the USGS |
| |
|
| Well
information |
| Depth: |
21.11 feet |
| Open interval: |
18.05–21.05 feet |
| Original and current use: |
monitoring, USGS |
| |
|
| Aquifer
information |
| Type: |
surficial sand and gravel |
| Thickness: |
more than 22 feet (0–>22 feet, BLS) |
| Deposit: |
sand and gravel alluvium deposited by a glacial melt-water
stream |
This site is operated in cooperation with the Prairie Island Indian
Community
Water levels below land surface are accurate to 0.01 feet. Water levels
above National American Vertical Datum of 1988 (sea level) are
calculated by subtracting recorded water levels from the land surface
elevation, which is accurate only to plus-or-minus 0.01 foot based on
optical level survey. The well went dry below 8.79 feet below land
surface during October 25, 2011–May 6, 2014. Water levels
recorded at or below this level during this periodrepresent a water
table less than 8.79 feet below land surface. After May 6, 2014, water
levels are recorded at a new, deeper well, which was drilled at this
site to replace the shallow one that would go dry.
Water temperature is accurate to plus-or-minus 1°C, but differences
in temperature is accurate to 0.1°C.
NOTE: During winter months, stage
and discharge may be significantly affected by backwater from ice,
resulting in incorrect discharge data. Consequently, discharge data may
not be displayed during periods of ice effect.
Click
here for more information.