REP01903

• Permit No: M1999098
• IBM Index Class Name: Report
• Doc Name: SLOPE STABILITY REPORT FOR RIVERVIEW RESOURCE
• Media Type: D
• Archive: No

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The sandy silt varies to a silty sand, is nonelastic to slightly
plastic and is damp to near saturated in its natural condition.
(4) Sand, Gravel and Cobbles: The gravel stratum was
encountered in all borings below the upper subsoils at depths
of two and one-half (2-1 /2) to eleven and one-half (11-1 /2)
feet below the surface and extends to the bedrock below. The
sand and gravel is well graded, contains cobbles ranging in
I size up to six (6) to eight (8) inches in diameter, traces of
silt and is medium dense to dense in situ.
(5) Sandstone-Siltstone Bedrock: The bedrock was encountered in
all borings at depths eleven and one-half (11-1/2) to
forty-one (41) feet below the surface and extends to greater
depths. The upper one-half (1 /2) to one (1) foot of the
bedrock is highly weathered; however, the underlying
interbedded sandstone and Siltstone is firm to dense.
(6) Ground Water: At the time of the investigation, free ground
water was encountered at the site at depths of one and
one-half (1-1/2) to thirteen and one-half (13-1 /2) feet below
the surface. Water levels in this area are subject to change
due to seasonal variations, irrigation demands on the site and
the volume of flow in the Cache La Poudre River adjacent to
he project area.
RECOMMENDATIONS AND DISCUSSION
Test borings drilled at the site indicate that the sand and gravel
stratum at the site varies in thickness from four (4) to thirty and
one-half (30-1/2) feet. The overburden thickness at the site varies in
thickness from two and one-half (2-1 /2) to eleven and one-half (11-1 /2)
feet below the surface. Average thickness of the gravel is twenty-two
(22) feet along the northern edge of the site in the area of Borings 1
through Sand nine and one-half (9-1/2) feet throughout the remainder
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