VER-94D (Hoopeston)

Illinois State Water Survey

Located in Iroquois County, Illinois, this groundwater monitoring location is associated with a water well in the Sand and gravel aquifers (glaciated regions).

Well Construction

Depth Description
0.0-315.0 ft 2.0 in diameter none casing
- ft none screen
Depth Lithology Description
0.0-3.0 ft unknown clay, black, very silty to clayey silt, crumbly (topsoil)
3.0-9.0 ft unknown clay, yellow-brown to olive-brown, moderately silty; sticky
9.0-18.0 ft unknown clay, medium gray, slightly to moderately silty; stiff, cuts into "ribbons" (lacustrine?)
18.0-33.0 ft unknown clay, medium dark gray, faintly greenish cast; somewhat stiff, slightly sandy, slighty pebbly
33.0-39.0 ft unknown clay, gray, sandy (till)
39.0-56.0 ft unknown clay, medium dark gray, silty, stiff, very little sand; firm, smooth drilling
56.0-60.0 ft unknown clay, greenish-gray, moderately silty, very slightly sandy; with thin brown layers of clay at about 58'
60.0-65.0 ft unknown clay, brownish olive gray, gravelly
65.0-89.0 ft unknown clay, medium dark gray, sandy, pebbly (till)
89.0-99.0 ft unknown sand, olive gray, medium to coarse; with many very fine & fine sand grains, abundant with white rock fragments (limestone?)
99.0-121.0 ft unknown clay, gray to pinkish gray, moderately silty, sandy, pebbly (till)
121.0-123.0 ft unknown sand & gravel; mostly coarse sand
123.0-130.0 ft unknown clay, gray to pinkish gray, moderately silty, sandy, pebbly
130.0-136.0 ft unknown sand
136.0-149.0 ft unknown clay, gray to pinkish gray, moderately silty, sandy, pebbly
149.0-165.0 ft unknown sand, brownish-gray, medium to very coarse; with very fine to medium gravel, lots of black & gray rounded grains up to 3/8" diameter
165.0-171.0 ft unknown clay, sandy
171.0-223.0 ft unknown sand, gray, medium to very coarse; with very fine to medium gravel & some very fine sand, poorly sorted; fines are mostly rounded shale, limestone & quartz
223.0-233.0 ft unknown sand, gray, fine to coarse; finer-grained than overlying interval & tends to be medium sand
233.0-245.0 ft unknown sand & gravel, gray; increased percentage of fine gravel (1/4")
245.0-300.0 ft unknown sand & gravel, gray, medium to very coarse sand with 3/8" gravel; abundant light gray grains with lesser amounts of white chert & medium brown dolomite fragments in samples
300.0-301.0 ft unknown rock; rig chatters loudly as it pushes aside obstruction
301.0-318.0 ft unknown sand & gravel; very fine sand to medium gravel, poorly sorted; red grains very common, finer grains typically rounded quartz while others are mostly shale & limestone
318.0-320.0 ft unknown shale, bluish to greenish-gray, moderately silty, very calcareous; very hard drilling
320.0-323.0 ft unknown dolomite (?), bluish gray, noncalcareous; lithified, is likely fractured as drillstem dropped about 1' at 322 foot depth

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