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HomeMy WebLinkAbout190 Gore Trl - 210716306001 - Summit Halfway HouseINDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT
EAGLE COUNTY ENVIRONMENTAL HEALTH DIVISION
P.O. Box 179 - 500 Broadway • Eagle, CO 81631
Telephone: (970) 328-8755
COPY OF PERMIT MUST BE POSTED AT INSTALLATION SITE. PERMIT NO. 2016-00 BP NO. 13258
OWNER: KENSINGTON PARTNERS PHONE: 970-390-5030
MAILING ADDRESS: P.O. BOX 988, EDWARDS, CO 81632
APPLICANT: CHRIS WILLIAMS, JOHNSON, KUNKLE & ASSOCIATES, INC. PHONE: 970-328-6368 EXT. 223
SYSTEM LOCATION: 290 WEBB PEAK, CORDILLERA GOLF COURSE, EDWARDS TAX PARCEL NO. 2107-163-016001
LICENSED INSTALLER: SPIEGEL CONSTRUCTION, CHRIS SPIEGEL LICENSE NO. 20-00 PHONE: 970-524-7148
DESIGN ENGINEER: JOHNSON, KUNKLE & ASSOCIATES, INC., CHRIS WILLIAMS PHONE NO. 970-328-6368
INSTALLATION HEREBY GRANTED FOR THE FOLLOWING: MINIMUM REQUIREMENTS FOR THE GOLF COURSE HALFWAY HOUSE RESTAURANT
1250 GALLON CONCRETE SEPTIC TANK, 4495 SQUARE FEET OF ABSORPTION AREA, VIA 145 INFILTRATOR UNITS AS PER ENGINEER'S DESIGN.
SPECIAL REQUIREMENTS: INSTALL AS PER ENGINEER'S DESIGN REVISIONS DATED 8/16/00. BE SURE TO MAINTAIN ALL APPLICABLE SET BACK
REQUIREMENTS. AN ENGINEER OR SOIL SCIENTIST NEEDS TO SUPERVISE THE INSTALLATION OF THE TRENCHES IN THE SOIL BELOW THE CLAY
LAYER FOR BETTER INFILTRATION. RAKE ALL TRENCH SURFACES TO PREVENT THE SMEARING OF SOILS. AND DO NOT INSTALL IN WET WEATH-
ER. ENGINEER IS RESPONSIBLE FOR FINAL INSPECTION. DO NOT BACK FILL ANY PART OF THE INSTALLATION UNTIL THE ENGINEER HAS
INSPECTED AND APPROVED IT. THE BUILDING CERTIFICATE OF OCCUPANCY WILL NOT BE ISSUED UNTIL THE SEPTIC SYSTEM HAS BEEN
INSPECTED AND APPROVED.
ENVIRONMENTAL HEALTH APPROVAL: a DATE: AUGUST 17, 2000
CONDITIONS:
1. ALL INSTALLATIONS MUST COMPLY WITH ALL REQUIREMENTS OF THE EAGLE COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM REGULATIONS,
ADOPTED PURSUANT TO AUTHORITY GRANTED IN 25-10-104, 1973, AS AMENDED.
2. THIS PERMIT IS VALID ONLY FOR CONNECTION TO STRUCTURES WHICH HAVE FULLY COMPLIED WITH COUNTY ZONING AND BUILDING
REQUIREMENTS. CONNECTION TO, OR USE WITH ANY DWELLING OR STRUCTURE NOT APPROVED BY THE ZONING AND BUILDING DEPARTMENTS SHALL
AUTOMATICALLY BE A VIOLATION OF A REQUIREMENT OF THE PERMIT, AND WILL RESULT IN BOTH LEGAL ACTION AND REVOCATION OF THE PERMIT.
3. CHAPTER IV, SECTION 4,03.29 REQUIRES ANY PERSON WHO CONSTRUCTS, ALTERS OR INSTALLS AN INDIVIDUAL SEWAGE DISPOSAL SYSTEM TO
BE LICENSED.
FINAL APPROVAL OF SYSTEM (TO BE COMPLETED BY INSPECTOR):
NO SYSTEM SHALL BE DEEMED TO BE IN COMPLIANCE WITH THE EAGLE COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM REGULATIONS UNTIL THE SYSTEM
IS APPROVED PRIOR TO COVERING ANY PORTION OF THE SYSTEM.
INSTALLED ABSORPTION OR DISPERSAL AREA: 4495 SQUAREFEET(VIA 145 INFILTRATOR UNITS. AS PER DESIGN )
INSTALLED CONCRETE SEPTIC TANK: 1250 GALLONS IS LOCATED DEGREES AND 40 FEET INCHES
FROM THE CLEANOUT ON THE EAST SIDF. OF THE BUTL.DTNG-
COMMENTS: THIS DEPARTMENT ACKNOWLEDGES THAT TH • SYSTEM INSTALLED WILL F N TTON, BUT IS NOT WHAT
WAS PERMITTED AND IS NOT IDEAL. THE ORIGINAL DESIGN CALLED FOR THE 2 SECTIONS OF THE LEACH
FTF.LD TO BE CONNECTED SERTAT,T.Y FROM THE T,AST TRENCH nF THE FAST FIEP,,D(THF. SMALLER OF THE 9), _
TO THE 1ST TRENCH OF THE NORTH FIELD. INSTEAD, THE FLOW IS DIVIDED WITH A SPLITTER TEE TO BOTH
FIELDS, IF THE TEE CONNECTION AT THE OUTLET OF THE TANK BECOMES UN—LEVFT, THE SYSTEM COULD FAIL
AT THAT POINT A REPAIR WOULD HAVE TO.BE DONE. THE ENGINEER HAS CERTIFIED THE''INSTALLATION'.-
ANY ITEM NOT MEETING REQUIREMENTS WILL BE CORRECTED BEFORE FINAL APPROVAL OF SYSTEM IS MADE. ARRANGE A RE -INSPECTION WHEN WORK IS
COMPLETED.
ENVIRONMENTAL HEALTH APPROVAL // IGtiw[ Q DATE: JULY 27, 2001
„
In^omplete Applications Will NOT Be Accepted
(Site Plan MUST be attached)
ISDS Permit # aC.KJ
Building Permit ##
APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT
ENVIRONMENTAL HEALTH OFFICE - EAGLE COUNTY
P. 0. BOX 179
EAGLE, CO 81631.
328-8755/927-3823 (El Jebel)
**************************************************************************
* FEE SCHEDULE
* PERMIT APPLICATION FEE $150.00 PERCOLATION.TEST FEE $200.00
* SIZING AND SITE VISIT FEE $85.00 (WHEN ENVIRONMENTAL HEALTH SIZES THE
* SYSTEM USING YOUR SOILS REPORT)
* MAKE ALL REMITTANCE PAYABLE TO: 'EAGLE COUNTY TREASURER"
**************************************************************************
PRnPF.RTY nWT\TFR
MAILING ADDRESS: box- C?e c3 cis ►C�_ rSl.�3'L PHONE: ` %0-YQ -b0
APPLICANT/CONTACT PERSON: CHR-,-3 U3\LLIAM") PHONE: 3'L9 -b3i E-ICA�
LICENSED SYSTEMS CONTRACTOR: SQosz� C �N.Q�: PHONE: 54y-"7jyg
COMPANY/DBA: ADDRESS: �2105 NP,1Zn Scr��h�so
***************************************************************************
PERMIT APPLICATION IS FOR: ()0 NEW INSTALLATION ( ) ALTERATION ( ) REPAIR
LOCATION OF PROPOSED INDIVIDUAL SEWAGE DISPOSAL SYSTEM:
Legal Description: C� da ���cc. U.►�lUr Ll
40 /
Tax Parcel Number: R(AtC \ k.�'"y 163 -6/Sot Size: NA
Physical Address: ac(o U,)O b%
BUILDING TYPE: (Check applicable category)
( ) Residential/Single Family Number of Bedrooms
( ) Residential/Multi-Family* Number of Bedrooms
04 Commercial/Industrial* Type
*These systems require design by a Registered Professional Engineer
TYPE OF WATER SUPPLY: (Check applicable category)
( ) Well ( ) Spring ( ) Surface
(ICJ Public Name of Supplier: C�__c�:��. Mb.an��;.� il.0-�ro
APPLICANT SIGNATURE: (22 , 1�/,.XX Date: 1/ 2112-t�
***************************************************************************
AMOUNT PAID: RECEI PT # : DATE:
CHECK # : 00(062 CASHIER:
Community Development Department
(970)328-8730
FAX (970) 328-7185
TDD (970) 328-8797
Email: eccmdeva@vail.net
http: //www.eagle-county.com
EAGLE COUNTY, COLORADO
Date: August 17, 2000
TO: Spiegel Construction
FROM: Environmental Health Division
Eagle County Building
P.O. Box 179
500 Broadway
Eagle, Colorado 81631-0179
RE: Issuance of Individual Sewage Disposal System Permit No.2016-00. Property
Location: 290 Webb Peak, Cordillera Golf Course, Edwards, Kensington Partners
property.
Enclosed is your ISDS Permit No. 2016-00. It is valid for 120 days. The enclosed copy of the
permit must be posted at the installation site. Any changes in plans or specifications
invalidates the permit unless otherwise approved. Please note any special requirements
that may have been added to the design by this department.
Systems designed by a Registered Professional Engineer must be certified by the Engineer
indicating that the system was installed as specified. Eagle County does not perform final
inspections on engineer designed systems. Your TCO will not be issued until our office
receives this certification.
Permit specifications are minimum requirements only, and should be brought to the property
owner's attention.
This permit does not indicate conformance with other Eagle County requirements. Please
notify this office if you have not been contracted to perform this installation.
If you have any questions, please feel free to contact the Environmental Health Division at 328-
8755.
cc: files
Johnson, Kunkle & Associates, Inc., Chris Williams
Community Development Department
(970) 328-8730
FAX (970) 328-7185
TDD (970) 328-8797
Email: eccmdeva@vail.net
http: //www.eagle-county.com
July 27, 2001
Kensington Partners
Attn: Dennis Stoner
P.O. Box 988
Edwards, CO 81632
EAGLE COUNTY, COLORADO
Eagle County Building
P.O. Box 179
500 Broadway
Eagle, Colorado 81631-0179
RE: Final of ISDS Permit 92016-00, Tax Parcel #2107-163-01-001. Property
location: Cordillera Golf Course Halfway House, 290 Web Peak, Edwards, CO.
Dear Mr. Stoner:
This letter is to inform you that the above referenced ISDS Permit has been inspected and
finalized. Enclosed is a copy to retain for your records. This permit does not indicate
compliance with any other Eagle County requirements. Also enclosed is a brochure regarding
the care of your septic system.
Be aware that later changes to your building may require appropriate alterations of your septic
system.
If you have any questions regarding this permit, please contact the Eagle County Environmental
Health Division at (970) 328-8755.
Sincerely, f
Janet Kohl
Environmental Health Department
Eagle County Community Development
ENCL: Informational Brochure
Final ISDS Permit
cc: files
Johnson, Kunkel & Associates, Inc.
CIVIL ENGINEERING • LAND PLANNING • SURVEYING • MAPPING
July 24, 2001
Eagle County Environmental Health
500 Broadway
Eagle, CO 81631
Attn: Ray Merry
Subject: Septic System As -Built, ISDS Permit No. 2016-00
Cordillera Summit Golf Course Half Way House at Hole 9
Property Location: 290 Webb Peak, Cordillera
Dear Mr. Merry:
As per our phone conservation on the 23rd of July, I went to the site and took some updated
pictures. The cart path does not encroach on either of the leach areas nor does it effect any of the
portholes. The east leach field area is in compliance with the design plans. The north leach field
was modified to accommodate the main cart path. The design was modified in the field from
having the two fields being connected, to both fields being separated through the use of a tee
connection at the outlet of the septic tank. The lower trench of the east leach field was too deep
to allow a gravity connection with the first trench of the north field. Thus the as -built drawings,
along with the pictures, show the system being different from what was approved.
The approved design was very conservative and the system should perform to the design as it
was intended. It would not be beneficial to dig up any of the cart path crossing to redo the system
as originally designed. The gravity connection will not work due to the infiltrators being buried
in the sandy layer of the soil which are approximately 4'-7' deeper thannatural ground level.
If you have any questions or comments, please contact me at 328-6368, ext. 223.
Sincerely,
Chris Williams
Production Administrator
Johnson Kunkel and Associates. Inc.
pc: Denny Stoner, Cordillera
P.O. Box 409 • 1286 Chambers Ave. • Suite 200 Eagle, Colorado 81631 • Phone (970) 328-6368 • Fax: (970) 328-1035
P.O. Box 771 196 • 1 120 So. Lincoln Ave. • Suite 202 Steamboat Springs, CO 80477 • Phone: (970) 879-4676 • Fax: (970) 879-4870
Johnson, Kunkel &Associates, Inc.
CIVIL ENGINEERING • LAND PLANNING • SURVEYING • MAPPING
July 20, 2001
Eagle County Environmental Health
500 Broadway
Eagle, CO 81631
Attn: Ray Merry
Subject: Septic System As -Built, ISDS Permit No. 2016-00
Cordillera Summit Golf Course Half Way House at Hole 9
Property Location: 290 Webb Peak, Cordillera
Dear Mr. Merry:
Please find enclosed the septic system as -built drawing and field photos for the Half Way House
at Hole 9. The as -built drawing shows the surveyed information, or actual location of the
infiltrator runs and septic tank. Field reports were done on two different days, and the
construction was being completed in conformance with the design drawings. Also enclosed is a
field report from HP Geotech.
If you have any questions or comments, please contact me at 328-6368, ext. 223.
Sincerely,
6&{-�
Chris Williams
Production Administrator
Johnson Kunkel and Associates. Inc.
pc: Denny Stoner, Cordillera
\\JKASVRE1\PROJECTS-N\EA00127\EC-Site Inspection.doc
RECEIVED
JUL202U01
EAGLE COUNTY
COMMUNITY DEVELOPMENT
P.O. Box 409 • 1286 Chambers Ave. • Suite 200 Eagle, Colorado 81631 • Phone (970) 328-6368 • Fax: (970) 328-1035
P.O. Box 771 196 • 1 120 So. Lincoln Ave. • Suite 202 Steamboat Springs, CO 80477 • Phone: (970) 879-4676 • Fax: (970) 879-4870
Johnson, Kunkel, and Associates, Inc.
P.O. Box 409
Eagle, CO 81631
Phone: 328-6368
TO: Eagle County Environmental Health
Laura Fawcett
THE FOLLOWING WAS NOTED:
Date: ! 29-Aug-00 Job No.: EA00127
Project: Summl C Half Way House, Hole 9
Location: 290 Webb Peak, Edwards, CO
Contractor: Spiegel Owner: Cordillera
Weather: Sunny Temp: 80 F
Present at Site: Chris Spiegel (contractor), and Kathy
Scott (J&K)
1) This inspection took place before backfilling operations.
2) The sides of the trenches were raked to ensure absorption.
3) The trench under the pipe was smooth and level, and free of rocks.
4) The bends and joints of the pvc pipe were connected well.
5) The tee just outside of the septic tank was level. The concrete pad underneath the tee was formed, but
not poured.
6) The trenches were approximately 7-8 feet deep, due to the position of the sandy soil layer. The
infiltrators were in the sandy soil, as specified by the geotechnical engineer.
COPIES TO: MELD ; FU U
SIGNED:
REA0012700CUMENTSTIELD REPORT-2.xis 8129l00
Johnson, Kunkel, and Associates, Inc.
P.O. Box 409
Eagle, CO 81631
Phone: 328-6368
TO: Eagle County
Laura Fawcett
Environmental Health
THE FOLLOWING WAS NOTED:
Date: 23-Aug-00 JJob No.: EA00127
Project: Summit GC Half Way House, Hole 9
Location: 290 Webb Peak, Edwards, CO
Contractor: Spiegel Owner: Cordillera
Weather: Sunnv Tema: 80 F
Present at Site: Chris Spiegel (contractor), and Kathy
Scott (J&K)
1) This inspection took place before backfilling operations.
2) The sides of the trenches were raked to ensure absorption.
3) The trench under the pipe was smooth and level, and free of rocks.
4) The bends and joints of the pvc pipe were connected well.
5) Clean -out was placed within three feet of the building foundation.
COPIES TO: VDCEdD NIEP U
SIGNED:
REA0012700CUMENTS\FIELD REPORT-1.xls 8129/00
JUL-20-2001 11:34 H—P GEOTECH
P.02/04
C�tech
August 31, 2000
Hepworth-Pawlak Geotechnical, Inc.
$020 County Road 154
Glenwood Springs, Colorado 81601
Phone:970-945-7988
Fax: 970-94$-8454
hpgeo@hpgeotech.com
Kensington Partners
Attu: Denny Stoner
P.O. Box 988
Edwards, Colorado 81632 Job No. 199 834
Subject: Observation of Excavation, Proposed Comfort Station No. 2, Halfway
House; Golf Course, The Summit at Cordillera, 290 Webb Peak Road,
Eagle County, Colorado.
Dear Mr. Stoner:
As requested by Darryl Lundholm with R.A. Nelson, a representative of Hepworth-
Pawlak Geotechnical, Inc. observed the excavation at the subject site on August 17,
2000 to evaluate the soils exposed for foundation support. The findings of our work
and recommendations for the foundation design are presented in this report. We
previously conducted a preliminary geotechnical study and percolation testing for the
proposed comfort stations and presented our findings in a report dated January 17,
2000, Job No: 199 834.
Proposed comfort station No. 2 will consist of a single story wood. frame structure with
a slab -on -grade floor. The structure will have a footprint of about 24 by 35 feet. An
allowable bearing pressure of 2,000 psf was assumed in the design based on the
preliminary study. The ground surface slope is moderate down to the north.
At the time of our visit to the site, the foundation excavation had been cut in multiple
level from 2 to 12 feet below the adjacent ground surface. The soils exposed in the
bottom, of the excavation consisted of stiff sandy clay to clayey sand. Results of swell -
consolidation testing performed on a sample of the clay taken from the site, shown on
Fig. 1, indicate the -soils have low compressibility under existing moisture conditions
and light loading and a low expansion potential when wetted under a constant light
surcharge. A sample of the clayey sand was tested and found to have a moisture
content of 15.7 %, a dry density of 98 pcf and 37 % passing the Nei. 200 sieve (silt and
clay fraction). No free water was encountered in the excavation and the soils were
moist.
The soil conditions exposed in the excavation are consistent with those previously
encomtered on the site. Spread footings designed for an allowable bearing pressure of
2,000 psf can be used with some risk of potential heave if the bearing soils become
JUL-20-2001 11:35 H-P GEOTECH
F
v ,
,,,
Kensington Partners
August 31, 2000
Page 2
wetted. A minimum dead load pressure of 600 psf could be used on the footings to
limit the potential heave. Loose and disturbed soils should be removed in the footing
areas to expose the undisturbed natural soils. Other recommendations presented in our
previous report which are applicable should also be observed.
The recommendations submitted in this letter are based on our observation of the soils
exposed within the foundation excavation and the previous limited subsurface
exploration at the site. Variations in the subsurface conditions below the excavation
could increase the risk of foundation movement. We should be advised of any
variations encountered in the excavation conditions for possible changes to
recommendations contained in this letter.
If there are any questions or if we may be of further assistance, please let us know.
Sincerely;
HEPWORTH - PAWLAK
. 1
rordy Z. Adamson, 7 ., P E.
Rev. by: -SLP
TZAIksw
attachment
MCHNICAL, INC.
297 fir.
cc: R.A. Nelson •- Atta: Darryl Lundholm
0
H-P GEOTECH
JUL-20-2001 11:35 H-P GEOTECH
V
P.04/04
to 1
r
0
fl.
x
w
t 0
c
0
a
0
C�
2
Moisture, Content = 23.7 percent
Dry Density = 102 pcf
Sample of. Sandy Clay
From: Bottom of Excavation at
Expansion
upon
0.1 1.0 10
APPLIED PRESSURE -- ksf
100
199 834 I HE0 ORTH C PA NC SWELL— CONSOUDATiON TEST RESULTS Fig. 1
TOTAL P.04
i.F7: _1,i H—r >>c 1-E�7H
P.011. '-
,iiv9%vQrth-Pws'1jk Gpi'A^C# nical, ine.
500 County Road 154
G99
f.:6e�1SsnOd 4prinatechv, Cnit,rurio S(bf►!
Phone: 970-94g•7935
Fax- 970.935•84i4
Aualst 14, 2iM 21pg.tSce';� gtntce9S.^orre
Cordillera Construction Corporation
'ltrru Denny Stoner
P.O. Box 988
Edwards, Coluradc 81632 Jo , No. 199 834
Subject; Percolation Testing, Proposed Halfway House:, The Summit Golf Course
at Cordillera, Eagle Cowuty, Cptorade.
Clear Mr. Stoner:
As requested by you., Hepworth PawJak Geotecbxical, .Inc. perfom ed percolm on
testing at the subject sire. The work was done in accordaace with our Agreement for
Professiunai Sefvices it) you, dated October 15, 1999. W-c FrLvic'usly performed
pe%olatiun testing :or comfort Stations i ;nrougb 4 at the Su nrnit Golf Course and
reported our fwdir.gs January 17, 2000, Job Number 199 834.
J� A Profile Pit and two percolation test holy, were excavated on Augwt 7, 2000 at the
13� locadons shown on Fig 1 The testing was conducted at the location of Comfort
its 3 and 4). The subsoils exposed in the ProfLlC pit onnsisfed of about l V2
fee? of topsoil overlying clayey sand with gravel co 4 feet .aiid samly clay to the bottom
` L, pi: depth of ilia feet. No free Nvarer was observed in the pit and the soils were slightly
�^1 moistFo moist, Percolatiun test holes were land dui; in the i ottom of shaflow backhoe
''V
l�itss and soaked with, water on August 7. LOOO.
Percolation testing was conducted can August 8, 20CC1, by a I eprl scat -*LVC of Hepworth
Pawiak Geotechrical, Inc. The percolation test result, are surnrua ized oil- Table I.
Based on the subsurfw;e conditions encountered and the percolation test results, a
prcfessicnaI civil eagineer should design the septic disposal systern..
If you have any ques'lio is or deed ftlirtbei assistance, please call our off -cc,
Sincerely,
HEPWORTH •- P.AWLAK GEOTECRNICAL. PNrC.
Louis E. Eller
Reviewed by, ,
b.
Daniel E. 3H,.ardin, P.E. � c
LEE!rsolkl.
attachments
cc. Johnson, Kunkc-1 &
,- W11
24`sw,4
Mai Dr!A n: C;hri�; Williams
H--F GEDTECH
APPROX4ATE SCALE
1" - 60C'
Rr;PIN-. I A n
BORING I
(PITS 3 & 4),
a
199 834 � HEPWORTH - PAWLAK
GEOTLCHNICAL, INC.
LESEND-
al PROF;IE P'T ANC PER'Cl; - All0'q TEST HOLES
FOR �ZRRiNT TEST.
PROPO.SEnw COMFORT S7ATiQN
• clORIING LAL.ED FOR J,,^)S 440. 199 473
0 ElORING CPI --CD FOR JOS NO. 1197 407
LUCATION QF PER""'CLATICN 7;'AT HOL'S I Pig, I
„ k_i3-14-:2000 16;
K '
HEPWORTH-PAW LAK GEOT'ECHN{CAL, INC..
TABLE I
PERCOLATION TEST RESULTS JOB NO.199 834
HOLE NO.
HOLE DEPTH
f_ZNGTH OF
WATER DEPTR �
WATER DEPTH
CROP IN
AVERAGE
{INCHES!
INTERVAL
AT START OF
AT END OF
WATER
PERCOLATION
(MINI
INTERVAL
INTERVAL
LEVEL
RATE
(INCHES)
ONCHE&
{INCHES}
MIN.1 NcW
47
15
7 1,4
7 114
7 114
0
7 Its
11$
7 VS
7
118
7
6 7/8
i rg-
6 718
6 314
1i8
1
6 314
6 516
its
Oslo-
6 112
120
11i3
is
7 114
1 P-r b i 67
7
1.14
078 r
i 5 3/4
Ifs
{
6 314
6 618
s 518
6 112
i!8
I M
fi 112
B 3i8
11s
63,18
1 61,)4
Now Last MfO readings used to determine average percnlaticn rate.
IOTA- .0-
A
h
M-1
G4'0f'1tech
Hepworth-Pawlak Geotechnical. Inc.
9020 County Road 154
Glenwood Springs, Colorado 81601
Phone: 970-945-7988
Fax: 970-945-845 4
hpgeo@hpgeotech.com
'JAB 2 5 �0
PRELIMINARY GEOTECHNICAL STUDY
AND
PERCOLATION TESTING
PROPOSED COMFORT STATIONS
GOLF COURSE
THE SUMMIT AT CORDILLERA
EAGLE COUNTY, COLORADO
0
JOB NO. 199 834
JAN[TARY 17, 2000
PREPARED FOR:
KENSINGTON PARTNERS
ATTN: DENNY STONER
P.O. BOX 988
EDjti ARDS. COLORADO 81632
LZI
HEPWORTH - PAWLAK GEOTECHNICAL, INC.
January 17, 2000
Kensington Partners
Attn: Denny Stoner
P.O. Box 988
Edwards, Colorado 81632 Job No. 199 834
Subject: Report Transmittal, Preliminary Geotechnical Study and Percolation
Testing, Proposed Comfort Stations, Golf Course, The Summit at
Cordillera, Eagle County, Colorado
Dear Mr. Stoner:
As requested, we have conducted a preliminary geotechnical study for the proposed
comfort stations.
Subsurface conditions encountered in the exploratory pits excavated in the proposed
building areas generally consist of between 2 to 3 feet of topsoil overlying sandy clay
and clayey sand with varying amounts of basalt fragments from gravel to cobble size. A
low to moderate expansion potential was indicated for the clay soils. Groundwater was
not encountered in the pits and the soils were slightly to moist to moist.
Spread footings placed on the natural subsoils and designed for an allowable bearing
pressure of 2,000 psf to 3,000 psf appear suitable for building support. The footings
should also impose a minimum dead load due to the expansive clays. The expansion
potential of the subgrade should be eYaluated at the time of construction.
The report which follows describes our exploration, summarizes our findings, and
presents our recommendations suitable for planning and preliminary design. It is
important that we provide consultation during design, and field services during
construction to review and monitor the implementation of the geotechnical
recommendations.
If you have any questions regarding this report, please contact us.
Sincerely,
HE-PWORTH - PAWLAK GEOTECHNICAL, INC.
i
Jorly Z.JAd son, Jr. P.
Rev. By: SLP
JZ A/ksm
TABLE OF CONTENTS
PURPOSE AND SCOPE OF STUDY ............................... 1
PROPOSED DEVELOPMENT ................................... 1
SITE CONDITIONS ...........................................
FIELD EXPLORATION ....................................... 2
SUBSURFACE CONDITIONS ................................... 2
PRELIMINARY DESIGN RECOMMENDATIONS ..................... 3
FOUNDATIONS ........................................
FLOOR SLABS ........................................ 4
UNDERDRAIN SYSTEM .................................. 4
SITE GRADING ........................................ 4
SURFACE DRAINAGE ................................... 5
PERCOLATION TESTING ................................. 5
LIMITATIONS .............................................. 6
FIGURE I - LOCATION OF EXPLORATORY PITS
FIGURE 2 - LOGS OF EXPLORATORY PITS
FIGURE 3 - LEGEND AND NOTES
FIGURES 4 through 7 - SWELL -CONSOLIDATION TEST RESULTS
FIGURE 8 - GRADATION TEST RESULTS
TABLE I - SUMMARY OF LABORATORY TEST RESULTS
TALE II - PERCOLATION TEST RESULTS
PURPOSE AND SCOPE OF STUDY
This report presents the results of a preliminary geotechnical study for the
proposed comfort stations to be located on the golf course at The Summit at Cordillera,
Eagle County, Colorado. The project site is shown on Fig. 1. The purpose of the
study was to evaluate the subsurface conditions and their impact on the project. The
study was conducted in accordance with our agreement. for geotechnical engineering
services to Cordillera Construction Corporation, dated October 15, 1999.
A field exploration program consisting of exploratory pits and percolation tests
was conducted to obtain information on the site and subsurface conditions. Samples of
the subsoils obtained during the field exploration were tested in the laboratory to
determine their classification, compressibility or swell and other engineering
characteristics. The results of the field exploration and laboratory testing were analyzed
to develop recommendations for project planning and preliminary design. This report
summarizes the data obtained during this study and presents our conclusions and
recommendations based on the proposed development and subsurface conditions
encountered.
PROPOSED DEVELOPMENT
The proposed comfort stations will consist of single story wood frame structures
with slab -on -grade floors at the locations shown on Fig. 1 Comfort Stations 1 and 3
will have.a footprint of about 15 by 20 feet. Comfort Station 2 will be a halfway house
and have a footprint of about 40 by 50 feet. Comfort Station 4 will be for the driving
range and have a footprint of about 24 by 40 feet. The development will be serviced
with municipal water and individual septic disposal systems.
If development -plans change significantly from those described, we should be
notified to re-evaluate the recommendations presented in this report.
-2-
SITE CONDITIONS
The comfort station sites were vacant at the time of our field work. The ground
surface in the areas of the proposed construction varies from slightly sloping at Station
4 and strongly to moderately steep sloping at Stations 1, 2 and 3. Up to 10 feet of fill is
located in the area of Station 4. Vegetation consists of brush, grass and weeds.
FIELD EXPLORATION
The field exploration for the project was conducted on October 19 and 20, 1999
An exploratory pit and profile pit were excavated at the comfort station locations shown
on Fig. 1 to evaluate the subsurface conditions. The its were dug with a trackhoe.
The pits were logged by a representative of Hepworth-Pawlak Geotechnical, Inc.
Samples of the subsoils were taken with relatively undisturbed and disturbed
sampling methods. Depths at which the samples were taken are shown on the Logs of
Exploratory Pits, Fig. 2. The samples were returned to our laboratory for review by
the project engineer and testing.
SLBSURFACE CONDITIONS
Graphic logs of the subsurface conditions encountered at the site are shown on
Fig. 2. The subsoils generally consist of between about 2 to 3 feet of topsoil overlying
sandy clay to clayey sand with varying amount of basalt fragments from gravel to
cobble size.
Laboratory testing performed on samples obtained from the pits included natural
moisture content, density, Atterberg limits and gradation analyses. Results of swell -
consolidation testing performed on relatively undisturbed drive samples, presented on
Figs. 4 through 7, indicate low compressibility under existing moisture conditions and
light loading. �1ost of the samples showed a low to moderate expansion potential when
wetted under a constant light surcharge. The sample from Pit 6 at a depth. of 3 feet at
H-P G_OTEC-
-3-
Comfort Station 3 showed a minor collapse potential (settlement under constant load)
when wetted and high compressibility upon increased loading after wetting. Results of
a gradation analysis performed on a disturbed bulk sample of the gravelly sand soils
(minus 5 inch fraction) from Pit 1 are shown on Fig. S. The laboratory testing is
summarized in Table I.
No free water was encountered in the pits at the time of excavation and the
subsoils were slightly moist to moist.
PRELIMINARY DESIGN RECOM'MENDATIONS
The conclusions and recommendations presented below are based on the
proposed development, subsurface conditions encountered in the exploratory pits, and
our experience in the area. The recommendations are suitable for planning and
preliminary design but site specific studies should be conducted for individual building
development.
FOUNDATIONS
Bearing conditions will vary depending on the specific location of the building
on the property. Based on the nature of the proposed construction, spread footings
placed on the natural subsoils should be suitable for building support. We expect the
footings can be sized for an allowable bearing pressure in the range of 2,000 psf to
3,000 psf. Expansive clays encountered in building areas may need to be removed or
the footings designed to impose a minimum dead load pressure to limit potential heave.
The expansion potential of the subgrade should be evaluated at the time of construction.
Foundation walls should be designed to span local anomalies and to resist lateral earth
loadings when acting as retaining structures. Below grade areas and retaining walls
should be protected from wetting and hydrostatic loading by use of an underdrain
system. The footings should have a minimum depth of 48 inches for frost protection.
M
FLOOR SLABS
Slab -on -grade construction should be feasible for bearing on the natural soils.
There could be some post construction slab movement at sites with collapsible matrix{ or
expansive clays. To reduce the effects of some differential movement; floor slabs
should be separated from all bearing walls and columns with expansion joints. Floor
slab control joints should be used to reduce damage due to shrinkage cracking. A
minimum 4 inch thick layer of free -draining gravel should underlie slabs to facilitate
drainage.
UNDERDRAIN SYSTEM
Although free water was not encountered in the exploratory pits, it has been our
experience in the area and where clayey soils are present that local perched groundwater
can develop during times of heavy precipitation or seasonal runoff. An underdrain
system should be provided to protect below -grade construction, such as retaining walls,
cra::-lspace and basement areas from wetting and hydrostatic pressure buildup. The
drains should consist of drainpipe surrounded above the invert level with free -draining
F
granular material. The drain should be placed at each level of excavation and at least
1 foot below lowest adjacent finish grade and sloped at a minimum 1 % to a suitable
gravity outlet.
SITE GRADING
The risk of construction -induced slope instability at the sites appears low
provided cut and fill depths are limited. Cut depths for the building pads should not
exceed about 10 to 12 feet. Fills should be limited to about 10 feet deep, especially
where they encroach steep downhill sloping areas. Structural fills should be compacted
to at least 95 o of the maximum standard Proctor density near optimum moisture
content. Prior to fill placement, the subgrade should be carefully prepared by removing
all vegetation and topsoil.. The fill should be benched into the portions of the hillside
exceeding 20 o grade. The on -site soils excluding oversized rock and topsoil should be
suitable for use in embankment fills.
P GE ,
SIB
Permanent unretained cut and fill slopes should be graded at 2 horizontal to
1 vertical or flatter and protected against erosion by revegetation, or other means. This
office should review site grading plans for each building prior to construction.
SURFACE DRAINAGE
The grading plan for the building sites should consider runoff from steep uphill
slopes through the project and at individual sites. Water should not be allowed to pond
which could impact foundations. To limit infiltration into the bearing soils nest to the
buildings, exterior backfill should be well compacted and have a positive slope away
from the building for a distance of 10 feet. Roof downspouts and drains should
discharge well beyond the limits of all backfill and landscape irrigation should be
restricted.
PERCOLATION TESTING
Percolation tests were conducted on October 20 and 21, 1999 to evaluate the
feasibility of an infiltration septic disposal system at each site. One profile pit and three
x
percolation holes were dug at each of the comfort station locations shown on Fia. 1.
The test holes (nominal 12 inch diameter by 12 inch deep) were hand dug at the bottom
of shallow, backhoe pits and were soaked with water -one day prior to testing. The soils
exposed in the percolation holes are similar to those exposed in the profile pits shown
on Fig. 2 and typically consist of about 2 to 3,feet of topsoil overlying sandy clay -to
clayey and.with.varying amounts of.basalt fragments-from;gravel to cobbles. ske. The
percolation test results are presented in Table II. Based on the subsurface conditions
encountered and the percolation test results, the tested areas at Comfort Stations 1, 3
and 4 should be suitable for conventional infiltration septic disposal systems. Testing at
the Comfort Station 2 aoc'ation showed very low to no percolation. Based on` These$
results, we =recommend •the septic system=for °this area b& designed by -a civil engineer.
r-P G=01-
M
LIMITATIONS
This study has been conducted according to generally accepted geotechnical
engineering principles and practices in this area at this time. We make no warrantv
either expressed or implied. The conclusions and recommendations submitted in this
report are based upon the exploratory pits and percolation tests located as shown on
Fig. 1, the proposed type of construction and our experience in the area. Our findings
include interpolation and extrapolation of the subsurface conditions identified at the
exploratory pits and variations in the subsurface conditions may not become evident
until excavation is performed. If conditions encountered during construction appear
different from those described in this report, we should be notified so that re-evaluation
of the recommendations may be made.
This report has been prepared for the exclusive use by our client for planning
and preliminary design purposes. We are not responsible for technical interpretations
by others of our information. As the project evolves, we should provide continued
consultation, conduct additional evaluations and review and monitor the implementation
of our recommendations. Significant design changes may require additional analysis or
modifications to the recommendations presented herein. We recommend on -site
observation of excavations and foundation bearing strata and testing of structural fill by
a representative of the geotechnical engineer.
Respectfully Submitted,
HEPWORTH - PAWLAK
_.ram
Jordv Z. Adamson, Jr. P.
Reviewed By:
Steven L. Pawlak, P.E.
JZ A: ksm
C.
APPROXIMATE SCALE
LEGEND:
1"=600'
®
PROPOSED COMFORT STATION
®
BORING DRILLED FOR JOB
NO.
199 4-73
O
BORING DRILLED FOR JOB
NO.
197 407
BORING 16
O
9
8
10
7
80
ING
6
11
•
■
12
• ORIN 8
13
STATION 3
(PITS 5 & s)
BLOCK 1
5
16
14
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17
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15
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2
TRAIL
19
3
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BORING
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22
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23
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(PIT 7)
25
4
3
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2
6
B ING 3
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HEPWORTH — PAWLAK
LOCATIC�,
—
0� EXPLORATORY
PIT
PITS
F ic.
'•.
GEOTECHNICAL, INC.
PI-1PIT .2 , ►'
0
WC=21.7 QJ WC=22.6
DO=100 DD=100
LL-
WC=12.1
DD=101
200=33
CU
LL=35
m
WC-1 9.4
DD=100
5
v
WC=23.4 L
DD=101 I
L
CL
ID
PI=15 C
10 i t4=t4 10
- J -200=7
NP;
l
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STATION 1
15 STATION 2 15
PIT 5 PITS 6
0 0 --,
wC=16.4
',-V
'
WC=26.4
DD=95
5
;'•
OD=94
-200=37
O4
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WC=11.4
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e
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STATION 3
15 15
NOTE: Explanation of symbols shown on Fig. 3.
199 834 HEPWORTH - PAWLAK LOGS OF EXPLORATORY PITS Fig. 2
G`OTE CHNICAL, INC.
LEGEND:
TOPSOIL; sandy silty clay, scattered gravel, organic, firm, slightly moist, dark brown.
CLAY (CL); silty, sandy, scattered basalt gravel and cobbles, stiff to very stiff, slightly moist
to moist, reddish brown, high plasticity.
SAND AND CLAY (SC); silty, scattered basalt gravel and cobbles, dense to very stiff, slightly moist
to moist, light brown to white, calcareous.
SAND (SC); clayey, silty, scattered basalt gravel and cobbles, medium dense to dense, slightly
moist to moist, light brown, calcareous.
M
SAND AND GRAVEL (SC —GC); clayey, scattered cobbles, dense, slightly moist, light brown.
2" Diameter hand driven liner sample.
Disturbed bulk sample.
_J
NOTES:
1. Exploratory pits were excavated on October 19, 1999 with a backhoe.
2. Locations of exploratory pits were measured approximately by pacing from features
on the site plan provided.
3. Elevations of exploratory pits were not measured ,and logs of exploratory pits are drawn to depth.
4. The exploratory pit locations should be considered accurate only to the degree
implied by the method used.
5. The lines between materials shown on the exploratory pit logs represent the approximate
boundaries between material types and transitions may be gradual.
6. No free water was encountered in the pits at the time of excavating.
Fluctuations in water level may occur with time.
7. Laboratory Testing Results:
WC = Water Content ( % )
DD = Dry Density ( pcf )
+4 = Percent retained on No. 4 sieve
—200 = Percent passing No. 200 sieve
LL = Liquid Limit ( % )
PI = Plasticity Index (� )
NP = Nonplastic
199 874 HEPWOR TH — PAWLAK LEGEND AND NOTES
G`OTECHNICAL, INC.
Fig.
2
0]
7
bt
Moisture Content = 21.7 percent
Dry Density = 100 pcf
Sample of: Sandy Clay
From: Pit 1 at 3 Feet (station 1)
Expansion
upon
wetting
0.1
1.0 . . 10
APPLIED PRESSURE — ksf
100
Moisture Content = 22.6 percent
Dry Density = 100 pcf
Sample of: Sandy Clay
From: Pit 3 at 3 Feet (station 2)
Expansion
upon
wettina
0.1 1.0 10 100
APPLIED PRESSURE — ksf
199 834 HEPWORTH — PAWLAK qwc-' L—CONSOLIDATION TEST RESULTS Pig- c
GEOTECHNICAL. INC.
b\
C
0 1
.N
C
O
O_
X
W 0
I
C
0
En1
a�
o_
E
U 2
0.1
1.0
10 100
APPLIED PRESSURE
— ksf
C:_o
.N
C 1
O
n.
X
W
0
C
O
N
aNi 1
n
E
0
U
0.1 1.0 10 100
APPLIED PRESSURE — ksf
199 834
HEPWORTH - PAWLAK
SWELL -CONSOLIDATION TEST RESULTS
Fig. 5
GEOTEC='LAICAL, INC.
Moisture Content = 19.4 percent
Dry Density = 100 pcf
Sample of: Sandy Clay
From: Pit 4 at 3 Feet (station 2)
i
I
Expansion
upon
wetting
Moisture Content = 23.4 percent
Dry Density = 101 pcf
Sample of: Sandy Clay
From: Pit 4 at 6 Feet (station 2)
Expansion
upon
wetting
0 0
c
0
.y
0 1
x
W
I 2
c
o_
'N
N
F
n 3
E
0
U
Moisture Content = 26.4 percent
Dry Density = 94 pcf
Sample of: Sandy Clay
From: Pit 5 at 4 Feet (station 3)
Expansion
upon
wetting
0.1
0
ON
L
7
1.0 10
APPLIED PRESSURE — ksf
100
Moisture Content = 16.4 percent
Dry Density = 95 pcf
Sample of: Clayey Sand
From: Pit 6 at 3 Feet (station 3)
Compression
upon
wetting
8
0.1 1.0 10 100
APPLIED PRESSURE — ksf
199 83d HEP4VORTH — PAV�lLAFC SWEL L—CONSOLIDATION TEST RESULTS Fig. 6
GECTECHNICAL, INC.
Moisture
0
c 1
0
IN
N
m
n 2
ti
E
0
U
3
4
0. i
100
1.0
APPLIED
PRESSURE
—
10
ksf
199 834
HEPWORTH — PAWLAK
GEOTECHNICAL, INC.
SWELL —CONSOLIDATION TEST RESULTS
Fig. 7
Content = 11.4 percent
Dry Density = 105 pcf,
Sample of: Clayey Sand
From: Pit 6 at 6 Feet (station 3)
No movement
upon
wetting
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HEPWORTH-PAWLAK GEOTECHNICAL, INC.
TABLE 11
PERCOLATION TEST RESULTS JOB NO. 199 834
r atinn 'i Dnm- I _-; n
HOLE NO.
HOLE DEPTH
(INCHES)
LENGTH OF
INTERVAL
(MIN)
WATER DEPTH
AT START OF
INTERVAL
(INCHES)
WATER DEPTH
AT END OF
INTERVAL
(INCHES)
DROP IN
WATER
LEVEL
(INCHES)
AVERAGE
PERCOLATION
RATE
(MINJINCH)
P-1
31
15
'
10114
8 1 /2
1 3/4
24
8 1/2
7 1/4
1 1/4
7 1/4
6 1/4
6 1/4
5 1/2
3/4
5 1/2
4 314
3/4
4 3/4
4 1/
1/2
4 1/4
1/2
3/4
1/2
3
112
P-2
43
30
11 3/
11 114
112
80
11 1/4
10 1/2
314
10 l2
118
` 318
10 118
9 3/
3/8
P-3
42
15
10 1/2
9 1/2
1
30
9 1/2
9
1/2
9
8 1/4
314
81/4
71/2
4
7 1/2
7
1/
7
6 112
1/2
6
5 1 /2
1/2
NOTE: Percolation test holes were hand dug in the bottom of backhoe pits and soaked on October 19, 1999. The holes were
covered with rigid foam insulation to protect against freezing overnight. Percolation tests were conducted on October
20, 1999. The average percolation rates were based on the last two readings of each test.
HEPWORTH-PAWLAK GEOTECHNICAL, INC.
TABLE II
PERCOLATION TEST RESULTS JOB NO. 199 834
C0*rrif6"tation ;2,xv Paoe 2 of 4
HOLE NO.
HOLE DEPTH
(INCHES)
LENGTH OF
INTERVAL
(MIN)
WATER DEPTH
AT START OF
INTERVAL
(INCHES)
WATER DEPTH
AT END OF
INTERVAL
(INCHES)
DROP IN
WATER
LEVEL
(INCHES)
AVERAGE
PERCOLATION
RATE
(MIN./INCH)
P-1
33
15
11 114
9112
1 3/4
60.
9 1/2
8 3/4
3/4
8 3/4
8 5/16
7/16
85116
7 15/16
3/8
7 15/16
7 518
5116
7 5/8
7 7/16
3/16
P-2
35
15
30
8 3/8
8 5 /16
1/16
?
Z iJ
8 5/16
85116
0
8 5/16
8 1 /4
1116
8 1/4
8 1/4
0
P-3
44
15
30
813/16
813/16
0
f Ze>
8 13116
8 13/16
0
8 13/16
8 13116
0
813/16
813/16
0
NOTE
Percolation test holes were hand dug in the bottom of backhoe pits and soaked on October 20, 1999. The holes were
covered with rigid foam insulation to protect against freezing overnight. Percolation tests were conducted on
October 21, 1999. The average percolation rates were based on the last two readings of each test.
HEPWORTH-PAWLAK GEOTECHNICAL, INC.
TABLE II
PERCOLATION TEST RESULTS JOB NO. 199 834
Comfort Station 3 Panc% I „f d
HOLE NO.
HOLE DEPTH
(INCHES)
LENGTH OF
INTERVAL
(MIN)
WATER DEPTH
AT START OF
INTERVAL
(INCHES)
WATER DEPTH
AT END OF
INTERVAL
(INCHES)
DROP IN
WATER
LEVEL
(INCHES)
AVERAGE
PERCOLATION
RAT
(MIN./INCH)
P-1
15
30
101/8
91/16
1 16
19
91/16
81/8
1 5/16
8 1 /8
6 911
1 9/16
6 9/16
5
1 9/16
P-2
51
30
11 9/16
10 314
13116
31
10 3/
10 1 /8
5/8
0118
91/16
1 1/16
9 1/1
8 3/16
7/8
P-3
33
30
81/4
711/16
9116
28
7 11/16
7
11/16
7
5 718
1 1 /8
5 7/8
4 7/8
1
NOTE: Percolation test holes were hand dug in the bottom of backhoe pits and soaked on October 20, 1999. The holes were
covered with rigid foam insulation to protect against freezing overnight. Percolation tests were conducted on
October 21, 1999. The average percolation rates were based on the last two readings of each test.
HEPWORTH-PAWLAK GEOTECHNICAL, INC.
TABLE 11
PERCOLATION TEST RESULTS JOB NO. 199 834
rnrnfnrt Ctatinn A n_ _ _ A
HOLE NO.
HOLE DEPTH
(INCHES)
LENGTH OF
INTERVAL
(MIN)
WATER DEPTH
AT START OF
INTERVAL
(INCHES)
WATER DEPTH
AT END OF
INTERVAL
(INCHES)
DROP IN
WATER
LEVEL
(INCHES)
AVERAGE
PERCOLATION
RATE
(MIN./INCH)
P-1
36
15
water added
7 1/2
6 1/2
1
20
6 1/2
5 1/2
1
5 1/2
4 3/4
314
4 3/4
4
314
4
3 1/4
314
7
6
1
6
5 1/4
3/4
5 1/4
4 1/2
3/4
P-2
39
15
water added
8 1 /4
6 314
1 1/2
20
6 3/4
5 114
1 1/2
5 1/4
4 112
314
4 1/2
3 3/4
3/4
3 3/4
3
3/4
9
8
1
8
7 1/4
3/4
7 1/4
6 1/2
3/4
P-3
34
15
water added
10 1 /2
5 1 /2
5
15
5 1/2
3 114
2 114
10
71/2
21/2
7 112
5 3/4
1 3/4
5 314
4 1/4
•1 1/2
4 114
3
1 1/4
3
2
1
2
1
1
NOTE: Percolation test holes were hand dug in the bottom of backhoe pits and soaked on October 19, 1999. The holes were
covered with rigid foam insulation to protect against freezing overnight. Percolation tests were conducted on
October 20, 1999. The average percolation rates were based on the last two readings of each test.
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