HomeMy WebLinkAbout982530.tiff GEOLOGIC AND MINERAL
EVALUATION FOR THE PROPOSED
REMINGTON PLACE MINOR SUBDIVISION
WELD COUNTY, COLORADO
Prepared for
Intermill Land Surveying
1301 North Cleveland Avenue
Loveland, Colorado 80537
October 16 , 1997
Commission No . : 1119-85-01-01
Prepared By
FOUNDATION & SOILS ENGINEERING, INC .
5110 Granite Street , Suite D
Loveland, Colorado 80538
EXHIBIT
I IB
982530
TABLE OF CONTENTS
Transmittal Letter I
Scope
Site Description 1
Site Investigation 2
Geology
2
Potential Geologic Hazards and Recommendations 3
Potential Mineral Resources 4
Conclusion 4
List of References 7
Geologic & Vicinity Map Figure 1
Sand, Gravel , & Quarry Aggregate Resources Figure 2
FOUNDATION II Engineering,
AND SOILS Inc.
October 16 , 1997
Commission No . : 1116-85-01-01
Intermill Land Surveying
1301 North Cleveland Avenue
Loveland, Colorado 80537
Gentlemen:
The enclosed report presents the results of a geologic and mineral
evaluation for Remington Place Minor Subdivision, a proposed
subdivision of Weld County, Colorado.
We appreciate the opportunity to be of service to you on this
project . If you have any questions, please feel free to call .
Respectfully,
Thomas W. Fey,
Engineering Geologist
FOUNDATION & SOILS ENGINEERING, INC.
TWF/jle
5110 Granite Street,Suite D • Loveland,Colorado 80538 • (970)663-0138 • Fax (970) 663-1660
515 Main Street, Suite C • Longmont, Colorado 80501 • (303) 702-0661
s r o P $
The following report presents the results of our geologic and
mineral evaluation for Remington Place Minor Subdivision, a
proposed subdivision situate in the East Half of the Northeast
Quarter of Section 7, Township 7 North, Range 67 West of the 6th
Prime Meridian, Weld County, Colorado .
It is our understanding that the 29 . 4± acre site is to be divided
into five (5) residential lots ranging in size from 4 . 5 acres to
6 . 9 acres . The purpose of this investigation is to identify
potential geologic hazards and potential mineral resources which
may conflict with the development intended. The conclusions and
recommendations presented in this report are based upon the
acquired field data, review of the available literature, and
previous experience with similar geologic conditions in this area.
,S r T E DESCRTPTION
The site is located east of Fort Collins, north of Colorado Highway
14 on Weld County Road 15 . The parcel consists of a cornfield with
gradual slopes in all directions away from a centrally located
hill . The Larimer County Canal forms the west and south property
boundaries .
SITE INVESTIGATION
The site was visually inspected on October 10, 1997 . The locations
of geologic features are approximate and should be considered only
to the degree implied by the methods used to make those
measurements. A preliminary radiation survey was also conducted at
this time.
GROL OGY
The proposed site lies near the eastern edge of the Colorado
Piedmont Section of the Great Plains Physiographic Province. The
Colorado Piedmont is an elongated trough in the Great Plains,
adjacent to the Front Range of the Southern Rockies . The Colorado
Piedmont was formed when uplift of the area in Miocene-Eocene times
(20 - 50 million years ago) produced an increase of stream erosion
resulting in scouring next to the foothills and outlying areas .
The Piedmont is bordered by the southern Rockies to the west, Great
Plains escarpment to the northeast, and Palmer Divide to the south.
Structurally, the site lies in the Denver Basin, which is a thick
accumulation of Paleozoic and Mesozoic Era sediments involved with
down warping in the basin area and uplift of the adjacent
highlands . It is our understanding that faulting has not taken
place in the recent historic past in this area. This area is
2
classified as being in Seismic Zone 1 (Uniform Building Code-
Chapter 23) .
The site is overlain with surficial eolian sandy soils . These
soils consist primarily of sand, silt, and clay with small amounts
of gravel .
The Upper Cretaceous Pierre Shale - Transition Zone underlies the
surficial soils . The Pierre Shale consists of shale, siltstone,
and sandstone. The thickness of Pierre Shale is in the order of
several thousand feet in this area.
POTENTIAL GEOLOGIC HAZARDS AND
g E C O M M E N D A T I O N a
The siltstones of the Pierre Shale and associated soils may be
potentially expansive. The effects of the potentially swelling
and/or collapsible soil and rock can be minimized by careful
planning prior to construction at the site . A geotechnical
investigation should be conducted at each site to identify if these
conditions exist . Our preliminary radiation survey detected no
radiation levels higher than background levels . We further
recommend that preliminary radon mitigation measures be
incorporated in the construction of the homes at the site. Steep
banks were observed at the irrigation canal embankments which could
3
become unstable . No signs of significant movement were observed.
Building construction should be avoided within fifty (50) feet of
those slopes to avoid potential damage should slope movement occur.
POTENTIAL MINERAL RESOURCES
The Colorado Geological Survey describes part of this site as being
in a non-resource area. Therefore, we believe that there are no
economically extractable mineral resources (excluding oil and gas)
on the property.
S'' O N C L U S I O N
Potential geologic hazards such as expansive soils may be located
in various areas of the property. Care should be taken in choosing
each building site and designing the roadway. Follow-up
inspections and recommendations should be conducted as necessary
for each building site. Economic mineral resources were not found
in the property.
In conclusion, we feel that the development intended is compatible
with the geologic conditions at the site provided the
recommendations in this report are met .
4
i1
The data presented herein were collected to help determine the
feasibility of this project . Professional judgments on design
alternatives and criteria are presented in this report . These are
based on evaluation of technical information gathered, partly on
our understanding of the characteristics of the development
proposed, and partly on our experience with geologic conditions in
the area. We do not guarantee the performance of the project in
any respect, only that our geologic study and judgments rendered
meet the standard of care of our profession.
5
JJ,ST OP RR,FRRRN P,S
Schwwochow, S.D. , Schroba R.R. , and Wicklein, P.C. , Atlas of Sand,
r ve nd Ou rry Aggregate Resources -_Colorado Front Range
Counties, Colorado Geological Survey, Special Publication 5-B,
1974 .
Rogers, W.P. Ladwig, L.R. , Hornbaker, A.L. , Schwochow, S.D. , Hart,
S . S . , Shelton, D.C. , Scroggs, D.L. , and Soule, J.M. ,
Sui,clalinas and Criteria for TdentificPtion and Land-Use
controls of Geologic Hazard and Mineral Resource Areas,
Colorado Geological Survey, Special Publication 6 , 1974 .
Shelton, David C. And Rogers, William P. Environmental and
�nginee ng Geology of the Windsor Stud• area . Larimer and
W- ld Counties, Colorado, Colorado Geological Survey,
Environmental Geology 6 , 1987 .
6
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