HomeMy WebLinkAboutFOX HILLS 2 FILING SUBDIVISION FINAL - 36 93D - SUBMITTAL DOCUMENTS - ROUND 1 - GEOTECHNICAL (SOILS) REPORTFOUNOATIO N ENGINEERING
SUMMARY OF LABORATORY TEST RESULTS
Atterberg Limits
Unconfined
Compressive
Standard
Penetration
Soil or
Samole Location
.Natural
Natural
Gradation
Percent
Passing
Hole
Depth
moisture
Dry Density
CPCP).
Gravel
Sand
No. 200
Liquid
Plasticity
Strength
Blows/Ft.
Bedrock Type
(Feet)
Content (X)
(X)
(X)
Sieve
Limit
Inaex
* (PSF)
1
1-3
11.5
Sandy clay
2
1-3
9.5
Sandy clay
3
1-3
12.5
Clay with shale
3
4-5
---
50/7
Limestone
4
1-3
13.4
IT
35
48
37
16
---
5
1-3
18.5
Clay w/limestone
6
1-3
11.2
12
44
44
30
9
Sandy clay
7
1-3
6.4
50/10
Limestone
8
R = 7
16/12
I
10
1-3
13.9
30
43
27
NP
NP
Clayey sand
11
1-3
10.9
Clayey sand
12
1-3
13.2
Clayey sand
*Based on Pocket Penetrometer
AASHTO
"lassif. .
A-6(4)
A-4(1)
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Date April 11, 1994
Commission No. 1585-02-01-03
BORING• LOGS
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FOUNDATION ENGINEERING FIG.3
Date April 11, 1994
Commission No. 1585-02-01-03
BORING• LOGS
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Date: April 11, 1994
Commission No.: 1585-02-01-03
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FIG. 1
April 11, 1994
Commission No.: 1585-02-01-03
Page 2
County Road No. 38E
(DTN = 200, 18k ESAL = 1,460,000, psi = 2.0, Reliability Factor
= 85%, Design Structural Number = 3.98)
Option 1
HBP 4"
ABC 6"
SSB* 16"
TOTALS 26"
* NOTE: Existing and future
or a portion of the
could be conducted a
borrow materials are
verify the materials
Option 2
611
6„
19
Option 3
9-1/2"
9-1/2"
embankment fill could be considered all
Select Subbase (SSB). Further testing
s the subgrade is opened or as future
selected. The tests will be needed to
for use as Select Subbase.
The top three (3) inches of the Hot Bituminous Pavement (HBP) shall
meet Grading C (SC Type 2) or CX (SC Type 1) or equivalent of CDOT
Standards. The remaining HBP shall meet Grading G of CDOT
Standards. All Aggregate Base Course (ABC) shall meet Class 5 or
6 of CDOT Standards and be compacted to at least 95% or Standard
Proctor. All select subbase (SSB) shall meet Class 1 of CDOT
Standards or equivalent. The subgrade shall be stripped of
vegetation and topsoil, scarified to a depth of six (6) inches, and
recompacted to at least 95% or standard Proctor at plus or minus
two percent (+2%) of optimum moisture content. Additional
stabilization of the subgrade may be required. Stabilization
techniques such as lime, fly ash, cement or fabric can be
recommended at a later date, if needed.
If you have any questions, please feel free to call.
Respectfully,
Thomas W. Fin y, :.
Engineering Geologist;"
Revie ed by:
i!�.�^^'
Kevin W. Pat erson
FOUNDATION & SOILS ENG:INEERININC.
TWF/jlb
FOUNDATION Engineering,
AND SOILS Inc.
April 11, 1994
Commission No. 1585-02-01-03
Springfield Sixth Filing Joint Venture
213 Smokey Street
Fort Collins, Colorado 80525
RE: Pavement Recommendations for Fox Hills P.U.D., Larimer County,
'Colorado
Gentlemen:
Enclosed are the results of our investigation and recommendations
for the roadways to be constructed in and for Fox Hills P.U.D.,
Larimer County, Colorado. These recommendations are based on
software using the 1993 AASHTO "Guide for the Design of Pavement
Structures".
Test results conducted by A.G. Wassenaar in Denver, Colorado
indicate R-values of 7. The DTN's were provided by Larimer County.
R-values of subgrade soils = 7 (MR = 3775)
Design Life = 20 years
Standard Deviation = 0.44
Structural Coefficients
Asphalt (HBP) = 0.44
Plant Mix Bituminous Base (PMBB) = 0.34
Aggregate Base .Course (ABC) = 0.11
Select Subbase (SSB) = 0.10
All Interior Roadways (including Luther Lane)
(DTN = 5, 18k ESAL = 36,500, psi = 2.5, Reliability Factor = 70%,
Design Structural Number = 2.04)
Option 1 Option 2
HBP 3" 5"
ABC 6-1/2" -
TOTALS 9-1/2" 5"
100 East 3rd Street • Loveland, Colorado 8OS37 • (303) 663-0138