HomeMy WebLinkAbout980176.tiff DEPARTMENT OF PLANNING SERVICES
Weld County Administrative Offices, 1400 N. 17th Avenue, Greeley, CO 80631
Phone (970) 353-6100, Ext. 3540, Fax (970) 353-6312
USE BY SPECIAL REVIEW APPLICATION �
Application Fee Paid ( ()OE° Receipt#D)0a.4- Date 38 k(9),7
Recording Fee Paid / Receipt# Date /
Application Reviewed by:
TO BE COMPLETED BY APPLICANT: (Please print or type, except for necessary signature)
LEGAL DESCRIPTION OF SPECIAL REVIEW PERMIT AREA: ) O}- R Vit. n4- 1\160
5i3 -T30 - R(psw
PARCEL NUMBER: 1 .3 Qang1(12 digit number-found on Tax I.D.
Information or obtained at the Assessor's Office.
Section 1 2) , T 3 N, R (Dg W-Total Acreage 5 Zone District PGOverlay Zone Kim.
Property Address (if available) Ic3eOI 1;0(1 -3i �ig4J-PJ11Ie , Co 8Q(0,37
Proposed Use C0 IT)rnAkr,int 6pnosoRC;hip maNii gemekJ+
R0ph q Peer.JKl
SURFACE FEE (PROPERTY OWNERS) OF AREA PROPOSED FOR THE SPECIAL REVIEW
PERMIT
Name: BQiA J Anir1 L(sf WAIIRre Address: 1r'QI UJj e .e 13
i
City/State/Zip: V\N e J i I(P Home Telephone: Business Telephone c - () T)()
Co Sofc'5'(
Name: Address:
City/State/Zip: Home Telephone: Business Telephone
APPLICANT OR AUTHORIZED AGENT(if different than above)
Name:
Address: City/State/Zip:
Home Telephone: Business Telephone:
DEPARTMENT OF PLANNING SERVICES USE ONLY
Case# l A''Q - 1l IPr1
Floodplain: o Yes o No Geologic Hazard: ❑ Yes o No
I hereby state that all statements and plans submitted with the application are true and correct to the best of
my knowledge.
Meld tiounty Planning Dep 1
AUG 2 2 1997 � "lZ-2
Rev: 1-27-97 ignature: Owner or Authorized Agent
REGIVED 7 W oJZQ a c°
980176
1. How is this proposal consistent with the Weld County Comprehensive Plan?
Weld Country's Comprehensive Plan "promotes controlled or orderly urban
expansion in relation to the existing and future land use patterns...", (Weld
County Comprehensive Plan, p. 1-14). Our site is located approximately 1/4
mile south of WCR #34, on WCR #13. The area currently supports agricultural
and residential use. Conversion of agricultural land is allowed by the plan in
some instances. We feel our site does not meet the criteria for being prime
farm land since the majority of the site is used for residential purposes. In
addition we have no water rights.
We believe our request is consistent with Weld County's Comprehensive Plan
for the following reasons.
A. All buildings and improvements to the property will be constructed
primarily for agricultural use, ie: barns and sheds. All business activities
will be housed in structures comparable to those found in an agricultural
zone. NO buildings of a design similar to those found in a typical
commercial or industrial area will be constructed.
B. There will be NO signage advertising our business on the site.
C. The majority of the acreage will be used for the upkeep of our family's
horses. Thus providing several acres of open grassland within the area.
2. How does this proposal meet the intent of the zone district it is located in?
The intent of the agricultural zoning district is to preserve prime farmland and
as previously stated, we do not believe our 5 acres is considered prime
farmland. Additionally, our proposed usage is NOT IN CONFLICT with the
surrounding agriculture usage.
"The A district is also intended to provide areas for the conduct of Uses by
Special Review which have been determined to be more intense or to have a
potentially greater impact than Uses Allowed by Right". (Weld County Zoning
Ordinances, p. 1-30). We are asking to use a small portion of the 5 acres to
operate a Sports Marketing Company. The business requires space for
parking of employee vehicles and a future building as described above to
house the business activities.
3. Is this use compatible with future development as stated in the Weld Count
Comprehensive Plan? If Yes, How?
The only development we are requesting is the construction of a barn and a
roping arena. The development will remain compatible with the existing
agricultural uses.
980176
4. What type of uses surround this site? Is the request compatible with
surrounding uses?
The properties within 500 feet of the site are used for agricultural and
residential purposes. There is an arena 2 miles south on WCR 13 that is used
for a jackpot barrel racing events. Our property adjoins Thomas Lake on the
South side. Given the nature of our request, we believe our proposal is
compatible with the existing uses in the area.
5. Is this property located within a Flood Hazard Zone, Geologic Hazard Zone, or
Airport Overlay Zone - and does it meet these special requirements?
The property is NOT located within a flood hazard zone, geologic hazard zone,
or an airport overlay zone.
6. What efforts have been made to conserve productive agricultural land?
All of the proposed buildings and improvements will be constructed with the
intent that they can be used solely for agricultural purposes in the future if
desired. The proposed building that will be used to house the business will be
a barn and can be converted back into a barn in the future. We feel our site
does not meet the criteria for being productive agricultural land since the
majority of the site is used for residential purposes. In addition, we have no
water rights.
7. How will public health, safety and welfare be protected?
The special use that we are requesting will have no adverse affect on the
public health, safety and welfare.
8. What will the site be used for?
The site will be used to house a family owned business. Our business
implements and manages sponsorship contracts on a national basis for the
sport of rodeo. We have contracts with National Sponsors to fulfill and
administer specific sponsorship programs with rodeos across the United States
and Canada. All of our business is conducted by phone, therefore we have no
customer traffic. The sponsorship programs we manage require us to ship
promotional materials to and from approved events. These items may include
arena banners, posters, rodeo programs, rodeo tickets, and other promotional
materials. We may be required to print with laser printers information specific
to each event ie: dates on rodeo posters, information on rodeo tickets.
In addition, we would like to construct a roping arena as shown on the
enclosed map. The arena may have jackpot rodeo, 4-H and other youth
events from time to time. The primary use for the arena will be for training and
practicing with our own horses.
980176
9. How close is this site to other residential structures?
The closest residential structure is approximately 1 ,200 feet to the north on
Weld County Road 13.
10. How many people will be employed at this site & what hours will they work?
During our peak season (April to September) we will employ up to 8
employees. During the off season we will retain a staff of 4 to 5 employees.
The hours of operation we require our employees to be at the site will be from
8:00am to 6:00pm Monday thru Friday.
11 . How many people will use this site?
The only other people that will visit our site to conduct business in addition to
our employees will be Federal Express. Federal Express will Pick-up and drop
off packages once a day as a regularly scheduled stop. There will be NO
customer traffic.
The rodeo arena may be used for jackpot rodeo and 4-H events from time to
time and would be attended by a minimal number of visitors.
12. What type and how many animals if any, will be on this site?
Any animals kept on the site will be used for personal use and not used by the
Sports Marketing business.
13. What type and how much, if any, operating and processing equipment will be
utilized on site?
The only equipment used on this site will be personal computers and computer
laser printers.
14. What type and how many structures will be erected (built) on this site?
One additional structure will be built for use by the business. The purposed
structure will be a barn and can be converted back into a working barn in the
future if desired. Our overall objective is to construct only structures that
would be analogous with a rural residential site similar to those in the
surrounding area. Our desire is to maintain the future market value and
appeal of the property as an agricultural, rural residence.
15. What kind (Type, Size, weight) vehicles will access the site, and how often.
Only the personal automobiles driven by the employees and our family will
access the site daily. A standard size van used by Federal Express for
delivery will access the site ONCE a day. Pickup trucks pulling horse trailers
will access the site occasionally by 4-H club members.
980176
16. Will the site use a septic system or public sewer facilities?
The site will use a septic system. The original septic was designed by E.O.
Church Inc. and was designed for the existing residence. When installed the
system was over built by 35% as per E.O. Church's recommendations to
accommodate a business of up to 10 employees. (See Attached)
17. Are you proposing storage or stockpile of waste on this site? If so, what is the
size and type proposed?
No waste will be stored or stockpiled on the site.
18. How often will debris junk, or waste be disposed of? By what means?
A residential trash service will dispose of basic office trash one to two times
per week.
19. How long will it take to construct this site and when will construction begin?
The business is currently housed in the existing structure. An additional
structure will be built as required within the next two years.
20. Explain the purposed landscaping plans and erosion control measures
associated with this site.
Future landscaping plans include a 6 foot wood privacy fence that will act as a
visual screen to block the view from all public roads of employee parking. In
addition, native dryland grasses will be planted and maintained for the
prevention of soil erosion. Additional standard residential landscaping will be
done around the buildings in the next three to five years.
21. Explain any purposed reclamation procedures when termination of the special
review use begins.
No soil or land reclamation procedures will be required due to the special use
of this property.
22. Explain the need for the proposed use (activity) in Weld County.
The nature of our business requires that we employ people with a rodeo
background. The majority of people with rodeo experience come from rural
and agricultural backgrounds thus making Weld county a prime location for this
type of business. Employment in the sports marketing part of rodeo is very
difficult to find and extremely desirable for those with a rodeo background. We
believe that our business offers a unique and desirable opportunity for the
residents of Weld County. There are VERY few if any rodeo arenas available
in the area for use by 4-H clubs that don't charge an excessive amount for
rent. An arena available to 4-H clubs and other Non-Profit organizations is
greatly needed and would be a significant benefit for many of the youth in the
surrounding area of Weld County
980176
23. Who will provide fire protection for this site?
The Mountain View Fire Protection District is within 5 miles of the property.
24. What or who will provide water to this site?
The Little Thompson Water District will provide water to the property. Please
see enclosed letter from the Little Thompson Water District stating that there is
adequate water supply.
25. How will storm water drainage be handled on the site?
Storm water drains into a natural ditch (The ditch used as an overflow for
Thomas Lake) south of the property.
fDEPARTMENT OF HEALTH
1517 16 AVENUE COURT
GREELEY, COLORADO 80631
C ADMINISTRATION (970)353-0586
HEALTH PROTECTION (970)353-0635
COLORADO COMMUNITY HEALTH (970) 353-0639
FAX (970)356-4966
July 29, 1996
Brian Wallace
3430 South Jellison Court
Lakewood, Colordo 80227
4
RE: Individual Sewage Disposal System Permit No. : SP-9600325
Location: NE corner of WCR 13 and oil well service road, Lot B
Dear Mr. Wallace:
This is to inform you that your Engineer Designed Septic System has been reviewed
by the Weld County Board of Health and approved.
A copy of the Weld County Board of Health I.S.D.S. Review Form and
your I.S.D.S. Permit are enclosed. PLEASE NOTE THAT THE SYSTEM MUST
DE INSPECTED BY A REPRESENTATIVE OF THIS DEPARTMENT AND BY THE
DESIGNING ENGINEER. BEFORE THE SYSTEM CAN BE APPROVED FOR OPERATION.
THE ENGINEER MUST CERTIFY TO THIS DEPARTMENT. IN WRITING. THAT THE
SYSTEM HAS BEEN INSTALLED ACCORDING TO HIS/HER SPECIFICATIONS.
Should you have any questions regarding your septic system, please contact this
office at your earliest convenience at 353-0635.
Sincerely,
Troy Swain
Environmental Protection Specialist
TS/rb-0839
cc: Ed Chruch Engineer
980176
WELD COUNTY HEALTH DEPARTMENT
1517 16TH AVENUE COURT, GREELEY, CO 80631
(970) 353-0635 EXT 2225 FAX (970) 356-4966
Permit # : SP-9600325 Sec/Twn/Rng: PERMIT
Permit Type : RNEW C-commercial, R-residential ♦ NEW, REPair, l
VauLT
_
DM (Pi
� Applied: 06/14/1996
Parcel No: 1207 13 `3 � Expires: 06/09/1997
Location: NORTHEAST CORNER WCR 13 & OIL WELL SERVICE RD LOT B
Legal Desc :
APPLICANT DIVERSIFIED HOUSING Phone : 303-986-4705
3430 SOUTH JELLISON CT, LAKEWOOD, CO 80227
OWNER WALLACE BRIAN Phone : 303-986-4705
3430 S JELLISON CT, LAKEWOOD, CO 80227
Description: HOUSE 13-3-68
Commercial (Y/N) : N Residential (Y/N) : Y Acres : 5 . 00
Number of Persons : 2 Basement Plumbing (Y/N) : Y
Number of Bedrooms : 3 Bathrooms-> Full : 2 3/4 : 1/2 :
Water Public (Y/N) : N Utility Name :
Water Private (Y/N) : Y Cistern (Y/N) : Well (Y/N) : Y
Water Permit, No: i�
_ Percolation Rate : IS D.0 Limiting Zone : D ft _ in Desc :
Ground Slope : I Dir: Soil Suitable (Y/N) : /
engineer Design Req' d (Y/N) : In 100 Yr Flood Plain (Y/N) :
From the application information supplied and the on-site soil percolation data the following minimum installation specifications
are required: ll
Septic Tank( j000 gallons, Absorption Trench'-^ sq. ft .
or
t(t tanaQ ( Absorption Bed (.0.400 sq. ft .
In addition, this permit is subject to� the follo ing additional terms and
conditions : tjm * Oc , 4,0 'fIL C{(}gyp �Qca �
l
NOTICE
This permit is granted temporarily to allow construction to commence. This permit may be revoked or suspended by the Weld County
Health Department for reasons set forth in the Weld County individual sewage disposal system regulations including failure to meet
any term or condition imposed thereon during temporary or final approval. The issuance of this permit does not constitute
assumption by the department or its employees of liability for the failure or inadequacy of the sewage disposal system.
This permit is not transferable. Before issuing final approval of this permit the Weld County Health Department reserves the'right
to impose additional terms and conditions required to meet our regulations on a continuing basis. Final permit approval is
contingent upon the final inspection of the completed system by the Weld County Health Department.
‘.46L
7_ 2 7.--12-6
X ��
-7
Eny' rrinf al Specialist Date
980176
10-29-1996 O3:42PM FROM E CHURCH_MERRITT HOUSE TO 18009889252 P.02
EOCI
! E.O. CHURCH, INC.
' �; ENGINEERS & GEOLOGISTS
October 29 , 1996
Brian Wallace
500 9th Avenue, Suite 6
Longmont, Colorado 80501
Subject: Installation Observation, Proposed Residence
Lot B, Record Exemption 1207-13-1RE1217
Part of NE/4 , Section 13 , T3N, R68W, 6th P.M.
weld County, Colorado
Job No. 7362
Dear Mr. Wallace,
As requested, we observed the installation of the onsite wastewater
system (Ows) for the subject site. The system was designed under our
Job No. 7362 , dated June 13 , 1996.
We observed the installation for the proposed three bedroom residence
on October 28 , 1996 . The installed system includes two 1000 gallon,
two compartment, precast concrete septic tanks with a pump in a
screened vault in the second chamber of the second tank and 8400
square feet (SF) of drip irrigation field in eight sections. The OWS
was designed for three bedrooms requiring 6400 SF of drip irrigation
field but the system was oversized to accommodate up to four bedrooms. •
The pump and alarm were in place, but power was not available at the
time of our observation. The components of the OWS were installed in
general conformance with the plans and specifications.
If there are any questions, or if we can be of further service, please
call .
Very truly yours_:'e?PNd K�� e•.
E. 0. C1urch, It 0r -- �90N9o`
9994 �;
',. _ /v 1!•20'7:'
Joseph C. Kordzi-' ..,X •"
fax: 1-800-988-9252 , Attn: Brian Wallace
2 copies sent
cc: Weld County Health Department
980176
925 East 17th Avenue • Denver,Colorado 80218.1407 P.O. Sox 2859 • Evergreen,Colorado 80437.2869
(303)832-9692 FAX(303)832-3517- (303)674.0560 FAX(303)674-0513
TOTAL P.02
E0C!
E.O. CHURCH, INC.
ENGINEERS & GEOLOGISTS
June 13 , 1996
Diversified Building
Attn: Dennis Klimko
3430 South Jellison Court
Lakewood, CO 80227
Subject: Onsite Wastewater System Design, Proposed Residence
Lot B, Record Exemption 1207-13-1RE1217
Part of NE/4 , Section 13 , T3N, R68W, 6th P.M.
Weld County, Colorado
Job No. 7362
Dear Mr. Klimko,
As requested, we have reviewed subsurface conditions and prepared an
onsite wastewater system (OWS) design for the subject site. The design
is based on a review of plans and subsurface conditions investigated
by Soils and Materials Consultants , Inc. (SMC) , Project No. 1-1977-01 ,
dated May 17 , 1996 .
SITE CONDITIONS - The site is an approximate 5. 2 acre parcel located
in a rural area in Weld County, Colorado as indicated on Fig. 1 . A
single family residence is proposed in the northwestern portion of the
site. There is a gentle slope to the south at the proposed field.
The site has a moderate cover of native weeds and grasses .
PROPOSED CONSTRUCTION - The location of the proposed three bedroom
residence and field are presented on Fig. 1 . The sewage load for a
three bedroom dwelling is 450 gallons per day (GPD) , 675 GPD with a
1 . 5 safety factor. This loading includes a garbage grinder, dish
washer and washing machine. Water will be provided by an onsite well
to be located 100+ feet from the proposed field.
SUBSURFACE CONDITIONS - Subsurface conditions were investigated by
Soils and Materials Consultants, Inc. by drilling one profile boring
and four percolation holes at the locations indicated on Fig. 1.
Subsurface conditions in the profile boring consist of stiff to hard,
silty, sandy, clay to 3 .5 feet, underlain by stiff to very stiff, very
silty, sandy, clay to the maximum depth explored of 9 feet. No free
water was indicated at the time of drilling. Percolation test Hole 2
had a percolation rate of 60 minutes per inch (MPI) . The other three
percolation holes showed no movement. We recommend the OWS be designed
based on a percolation rate of 180+ MPI.
RECOMMENDATIONS - We recommend a low pressure shallow trench OWS be
installed in the natural soils. We recommend the OWS be designed
based on a percolation rate of 180+ MPI, which is an application rate
of 0 . 15 gallons/square-foot/day (GAL/SF/DAY) . This application rate
utilizes slow rate soil absorption and evapotranspiration (E-T) . The
septic system should be designed for a sewage load of 450 GPD. A low
pressure shallow trench dispersal system design based on an applica-
925 East 17th Avenue • Denver,Colorado 80218-1407 P.O.Box2869 • Evergreen,Colorado 80437-2869
(303)832.9692 FAX(303)832-3517 980176 (303)674-0660 FAX(303)674-0813
2
tion rate of 0 .15 GAL/SF/ DAY and a sewage load of 450 GPD is present-
ed on Figs. 1 - 4 . As indicated on Fig. 1 , the field has an area of
6400 square feet (SF) in 6 sections.
If the owner is anticipating finishing of additional bedrooms in un-
finished areas , we recommend the OWS be constructed to handle the ad-
ditional loading. The installation of a properly sized OWS to serve
future buildout can be cost effective. The proposed septic tank con-
figuration will serve up to a five bedroom residence. For greater than
five bedrooms, either or both of the septic tanks can be upsized to
1250 gallons to accommodate to seven bedrooms. For four bedrooms , 2106
SF of field should be added. Each additional bedroom over four bed-
rooms would require an additional 2106 SF of field.
We recommend the surface of the field be seeded after installation of
the low pressure shallow trench system. We recommend using a seed mix
such rs a "Foothills , Pasture, or Prairie" mixes available at seed
stores. The mixes do not require irrigation and develop a growth 10
to 15 inches . No automatic sprinkler system should be installed over
the field.
The owner must realize an OWS is different from public sewer service.
The owner must assume responsibility for maintenance of the system.
The system is relatively maintenance free , but the owner must have the
septic tanks pumped. We recommend the septic tanks be pumped every
two years and the screened vault be cleaned (hosed off) after pumping.
There are daily considerations , such as not putting plastic or other
nonbiodegradable material into the OWS. Water use must be monitored so
toilets are not allowed to run when seals malfunction. To illustrate
the point, a running toilet can consume in excess of 1000 GPD. An ex-
cess 1000 GPD loading could flood and irreparably harm the system and
stress the onsite well .
We caution against installation of a water softener. The hydraulic
loading from the backwash of a water softener is detrimental to OWS
and a separate drywell should be constructed for the backwash brine.
No landscaping or plastic can be used over the field, which will re-
duce performance of the field. Chemically treated water from a swim-
ming pool or spas should not be introduced into the OWS.
LIMITATIONS - A low pressure shallow trench design requires installa-
tion by a contractor who is experienced in its installation. Our
investigation, layout, design and recommendations are based on data
submitted. If subsurface conditions considerably different from those
described in this report are encountered, we should be notified to
evaluate the effect on the proposed septic system. If modifications
to this design are made by governing Health Departments, we should be
notified to evaluate the impact on the performance of our OWS design.
If there are any qu-_ .••. _ please call.
o• REG,
E. O. CH, N'4,vc/ tP T. S
a
� O9Q
_??9q9g94
oseph C. Kordz el,•,� P E.
JCK/cmcs A1-73-74
3 copies sent ``StONALE 980176
SSoils and
M Materials AR5604 KENDALL COURT
VADA.COLORADO 80002
CConsultants, Inc. (3031431-2335
SUBSOIL INVESTIGATION
PROPOSED RESIDENCE
LOT B
RECORD EXEMPTION 1207-13-1RE1217
WELD COUNTY, COLORADO
Project No. 1-1977-01
May 17, 1996
pEQ%S• Prepared for
_'�; •. 'gyp Brian Wallace
j',4 .
`..' �7,t �\\�11 kuitIlll //////�j�
r ��,;��t A•C99.F� Reviewed by
Robert A. Granica, P.E. 'c'j y�o" Richard W. Weber, P.E.
Project Engineer . 22245 '. ___ Principal Engineer<:.?(:/e• •••••` 980176
TABLE OF CONTENTS
GENERAL Page 1
PROPOSED CONSTRUCTION AND SITE CONDITIONS 1
SUBSOIL CONDITIONS AND FIELD INVESTIGATION 1
FOUNDATION - NARROW SPREAD FOOTINGS 2
ADDITIONAL FOUNDATION DESIGN CRITERIA 2
INTERIOR FLOOR SLAB CONSTRUCTION 3
DRAIN SYSTEM 4
BACKFILL & SURFACE DRAINAGE 5
PERCOLATION TESTS 6
LAWN IRRIGATION 6
GEOTECHNICAL RISK 7
DESIGN CONSULTATION & CONSTRUCTION OBSERVATIONS 7
TEST HOLE LOCATION PLAN Figure 1
LOGS OF TEST HOLES 2
LEGEND AND NOTES 3
SWELL - CONSOLIDATION TESTS 4
GRAIN SIZE DISTRIBUTION 5
MOISTURE BARRIER DETAIL 6
DRAIN SYSTEM DETAIL 7-8
LANDSCAPING DETAIL 9
PERCOLATION TEST RESULTS Table 1
980176
GENERAL
This report presents the results of a subsoil investigation conducted at the
site of a proposed residence to be located at Lot B, Record Exemption 1207-13-
1RE1217, a portion of the NE 1/4 of Section 13, Township 3 North, Range 68
West, Weld County, Colorado. The investigation was performed to determine
the best types and depths of foundations, allowable soil bearing pressures,
ground water conditions, and any special precautions that should be taken in
the design or construction of the structure due to the soil and ground water
conditions.
The conclusions and recommendations presented are based on the data
gathered during the site investigation, the results of the laboratory testing and
our experience with similar soil and ground water conditions.
PROPOSED CONSTRUCTION AND SITE CONDITIONS
It is assumed that the proposed residence will be one or two stories with
a partial basement and an attached garage, and that construction will be of
reinforced concrete foundations with a wood frame and brick veneer superstruc-
ture.
The ground surface at the site slopes to the southeast with approximately
one foot of elevation difference noted between the test holes and profile hole.
SUBSOIL CONDITIONS AND FIELD INVESTIGATION
Two test holes, one profile hole and four percolation holes were drilled at
the locations shown on Figure 1 , Test Hole Location Plan. The soils en-
countered in the test holes and profile hole are shown on Figure 2, Logs of Test
Holes, and described on Figure 3, Legend and Notes. Samples of the soils
encountered were taken at the depths shown on Figure 2.
The soils encountered in the test holes are fairly uniform. Generally, 10
to 11 feet of silty, sandy clays and very silty, sandy clays were encountered
over bedrock. The bedrock consists of sandstone and claystone.
1
980176
The silty, sandy clays and very silty, sandy clays encountered in the test M
holes have low swelling potentials. The sandstone has a non swelling potential
and the claystone has a moderate to high swelling potential. The results of
swell-consolidation tests and other physical property tests performed on
selected samples are shown on Figures 4 and 5.
No free water was encountered in the test holes at the time of drilling.
However, free water was found in Test Hole 2 at depth 21 .5 feet, two days
after drilling.
FOUNDATION - NARROW SPREAD FOOTINGS
The residence may be founded on narrow spread footings that are placed
on the natural soils and designed for a maximum soil bearing pressure of 2,500
pounds per square foot and a minimum dead-load pressure of 800 psf. The use
of wall-on-ground foundations is not recommended. Minimum 14 inch wide
footings should be specified for wall support and minimum 14 inch square for
interior columns. Interior loads should be supported on beams and columns, on
isolated pads, designed as above. The bottom of the footings supporting
exterior walls should be a minimum of 30 inches below final grade for frost
protection.
It is recommended that the excavation around upper level, exterior walls
be lined with a polyethylene moisture barrier as shown on Figure 6. This will
help to prevent excess surface water from seeping down to the foundation soils.
Some in-place densification of the existing soils may be necessary. This
can be accomplished by wheel rolling the excavation bottom with a loaded front
end loader. We should be called to observe the excavations prior to con-
struction to verify the soil conditions at bearing depth.
ADDITIONAL FOUNDATION DESIGN CRITERIA
Lateral earth pressures on walls depend on such factors as the type of
wall, hydrostatic pressure behind the wall, type and slope of backfill material,
degree of backfill compaction, allowable wall movements, and surcharge
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980176
loading. The hydrostatic pressures may be minimized by placing a drain system
around the perimeter of the foundation walls.
Basement walls should be designed for an active equivalent fluid pressure
of 45 pcf. The backfill should be compacted following the recommendations
outlined below (see Backfill and Surface Drainage). No consideration was given
to sloping backfill, surcharge loading, hydrostatic pressures, or horizontal
swelling pressures in the computation of the active equivalent fluid pressure.
If any of these conditions are anticipated, we are available to assist you in
revising these criteria.
Foundation walls should be reinforced with a minimum of two #5 bars,
or equivalent, continuous at the top and bottom of the walls (at maximum
vertical spacing). Refer to the foundation design for additional reinforcing
details.
INTERIOR FLOOR SLAB CONSTRUCTION
The soils encountered at slab level are stable at their natural moisture
contents. However, the owner should realize that when wetted, the soils will
swell. The only positive method of preventing movement of concrete slabs is
to provide structural floor systems - the floors would be supported by the
foundation walls. Structural floors are fairly expensive and may not be
warranted; however, the owner should realize that there is a risk of floor
movement with any other construction alternative. Floors should be supported
on wood joists over a crawl space area where feasible.
If the owner desires to use a slab on ground floor system and is willing
to assume the risk of possible slab movement, the details outlined below should
be followed during construction of the slab. Experience with similar soil
conditions indicates that these construction details will help to prevent wetting
of soils supporting the slab and will minimize any damage should some wetting
take place:
1 . The slab should be placed directly on the undisturbed, natural soils or
well compacted fill.
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980176
2. Separate the slab from all bearing members and utility lines to allow its M
independent movement; i.e., construct a floating slab. Provide positive
control joints at the junction of the slab with foundation walls.
3. Joints should be scored in the slab at maximum 200 square foot areas.
4. Construct a minimum 2 inch void space above, or below, partitions on
the slab. In finished areas, all furring strips, drywall and paneling
should stop 2 inches from the top of the slab. The 2 inch void space
can be covered with a molding strip.
5. If hot water heat is used, the piping should not be placed beneath the
concrete slabs. If a forced air furnace is used, a 2 inch collapsible con-
nection should be provided between the furnace and the heat ducts.
6. All interior water and sewer line trenches should be lined with
polyethylene film, or equal. The exterior trenches should be lined for
a minimum of 10 feet from the foundation walls. Backfill in these
trenches should be carefully compacted (see Backfill and Surface
Drainage below).
7. Keep the soils that will support the slab moist during construction by
occasional sprinkling and especially a day or so prior to pouring the
slab.
In addition, good backfill and surface drainage should be provided, and
lawn irrigation minimized, as discussed below.
The property owner must be aware that the potential movement of slabs
supported directly on these expansive soils could exceed the void spaces
recommended above. These void spaces are not intended to anticipate total
potential slab movement, but are intended to prevent immediate damage to the
superstructure and serve as an indicator to slab movement. These void spaces
must be maintained by the homeowner for the life of the structure.
DRAIN SYSTEM
Free water was encountered in Test Hole 2 at depth 21 .5 feet. The
ground water is deep and should not affect the proposed shallow construction.
4
980176
However, the foundation will extend into stiff clay. This material is relatively M
impervious and tends to trap water. The source of the water could be from C
excessive irrigation and poor surface drainage accumulating in backfill areas
with resultant seepage to foundation depth. A drain system should therefore
be provided around the structure. Typical drain system details are as shown on
Figures 7 and 8. The type of drain system will depend on the owner's decision
concerning floor slab support options and risks. The drain system should be
graded to a sump permitting pump discharge. A pump would not be required
until actual water accumulation occurs, and the amount of water could not be
bailed from the sump. We should be called to observe the soils exposed in the
foundation excavations to verify the details of the drain system.
BACKFILL & SURFACE DRAINAGE
The foundation soils should be prevented from being wetted after
construction. This can generally be accomplished by insuring that the backfill
placed around the foundation walls, to include excavation ramp and utility
trench backfills, will not settle after the completion of construction, and that the
backfill material is relatively impervious. The backfill material should be free of
trash and it should be moistened and somewhat compacted. The top and
bottom two feet of the backfills should be well compacted, but the middle
portions of the backfills should be only slightly compacted. These compaction
recommendations also apply to foundation ramp and utility trench backfills,
which are especially important. All ramp and utility trench backfills that are a
minimum 4 feet away from foundation should be well compacted, if possible.
Do not puddle backfill materials. Care should be taken during backfilling to
insure that the walls are adequately braced.
The final grade of the backfill should have a positive slope away from all
foundation walls. A minimum fall of 12 inches in the first 10 feet away from
the structure is recommended. Downspouts and sill cocks should discharge into
splash blocks when the ground surface is not protected by concrete slabs or
asphalt topping.
5
980176
PERCOLATION TESTS M
One soil profile hole and 4 percolation test holes were drilled at the C
locations shown on Figure 1 , attached. The log of the soils encountered in the
profile hole is shown on Figure 2. The results of the percolation tests are
summarized on Table 1 . The percolation results are unacceptable in accordance
with the governing health department regulations. This precludes the use of a
standard leaching field in the location tested. A specially designed septic
system will be required unless it is desired to conduct additional percolation
testing on other areas of the site.
LAWN IRRIGATION
The builder and/or owner should understand that a sprinkler system
should not be installed next to foundation walls or next to exterior slabs (porch,
patio, driveway or sidewalk). If a sprinkler system is installed, the sprinkler
heads should be placed so the spray from the heads, under full pressure, does
not fall within 5 feet of the foundation walls or exterior slabs, It is strongly
recommended that the owner install automatic shut off valves as an integral
part of the sprinkler system to help prevent leakage. Lawn irrigation should be
controlled due to the expansive soils on the site.
Particular care should be taken during final landscaping of the site. If the
owner desires to plant next to foundation walls or exterior slabs it should be
understood that there is a risk of future damage if wetting of the foundation
soils occurs. Therefore, it is advisable to plant only native vegetation next to
the foundation or exterior slabs that requires very little irrigation or only natural
precipitation.
As an alternative to planting next to foundations and exterior slabs, it is
advisable to install decorative landscaped areas such as gravel and/or bark. If
decorative areas are installed, the gravel or bark should be placed directly on the
soils or on a non-woven, geotextile fabric, which will allow natural evaporation
to occur and will still inhibit weed growth - the use of polyethylene is not
recommended. The edges of decorative areas should be constructed to allow
6
980176
surface drainage to be quickly discharged away from foundation walls or M
exterior slabs. This can be accomplished by insuring that the edges of
decorative areas are above the adjacent lawn or ground surface, and that
drainage is not impeded by grass stops. All grass stops should be perforated
or constructed to allow discharge out of the decorative areas. Refer to Figure
9 for a typical decorative installation detail.
GEOTECHNICAL RISK
The concept of risk as it applies to structure construction on expansive
soils sites is the single most significant aspect of any geotechnical evaluation.
The primary reason for this is that the methods used by geotechnical engineers
to develop recommendations for construction on expansive soils sites are not
an exact science. The methods used are typically empirical and, therefore,
engineering judgement and experience must also be applied. The solutions
presented in any geotechnical evaluation therefore cannot be considered risk
free, and are therefore not a guarantee that the interaction between the soils
and the proposed structure will act as desired or intended. The engineering
recommendations presented in the preceding sections are our best estimates of
the measures that are necessary to help the proposed structure perform in a
satisfactory manner. These recommendations are based on the information
generated during this and previous evaluations and our experience in working
with these types of conditions. The builder and owner must understand this
concept of risk, as it is they who must decide what is an acceptable level of risk
for the type of structure to be constructed on the site.
DESIGN CONSULTATION & CONSTRUCTION OBSERVATIONS
This report has been prepared for the exclusive purpose of providing
geotechnical design criteria for the proposed project in accordance with
generally accepted soils and foundation engineering practices. No other
warranty, expressed or implied, is made. If any changes in the nature or design
of the project are planned, the conclusions and recommendations contained in
7
980176
this report shall not be considered valid unless the changes are reviewed and the
conclusions and recommendations of this report are modified or verified in
writing.
It is recommended that we be provided the opportunity for a general
review of the final design and specifications to insure that the earthwork and
foundation recommendations have been properly interpreted and implemented
in the design and specifications.
It is also recommended that the owner be aware of those items covered
under the headings Interior Floor Slab Construction, Backfill and Surface
Drainage and Lawn Irrigation. The owner should also be especially aware of the
necessity of maintaining good surface drainage on the site and the importance
of keeping excessive water from the foundation backfill soils.
In any geotechnical investigation it is necessary to assume that the
subsoil conditions do not vary from those encountered in the test holes. Our
experience has shown that these variations exist and that they become apparent
in the foundation excavations. It is therefore recommended that we be called
to observe the foundation excavations prior to construction and to test the
placement of fill on the site.
Please contact us when further consultation or construction observation
services are necessary. The costs of these further services are not included in
the fee for this report.
RAG/akc
Copies: 3
8
980176
SCALE:1"=100'
Bench Mark -
Top of ground
at property
corner.
Assumed
elevation 100
feet.
TEST HOLE 1 `
PERCOLATION HOLE 1 I • M1 2
PROFILE HOLE va HOUSE
•
4 2
LEACH FIELD
O
O
O
cc
Lu
O M
5 o
W O
tocc
J }
W
J O
O O
J
W
WELD COUNTY ROAD 13
SSoils and
Materials C Project No. 1-1977-01 Consultants, Inc. TEST HOLE LOCATION PLAN
Figure No. 1
980176
TEST HOLE 1 2 PROFILE HOLE
-100
op100
221/6 _
$ 10/12
_
-
95 \\\ \� ,\` 95-
- \\\ \\ \\\
\\\ \\ 28/12 \\ -
- \\ 11/12 \\ \\\ -
\\ \\ \\\' -
90 \\
\\ - w
- u.
1
-85 } 25/5 -' 9i
85- w
28/3 -
80
- 80-
75 20/1 -
75-
Soils and Refer to Figure 3 for Legend & Notes
M Materials Project No. 1-1977-01
C Consultants, Inc. LOGS OF TEST HOLES
Figure No. 2
9801_76
LEGEND
• CLAY, silty, sandy (fine grained), stiff to hard, slightly moist to medium moist,
brown (CL)
riCLAY, very silty and sandy (fine grained), some soluble sulfates noted, stiff to
very stiff, slightly moist, slightly calcareous, brown (CL)
• SANDSTONE BEDROCK, fine to medium grained, weak to fair cementation,
silty, very hard, medium moist, yellow brown ISM-SP)
® CLAYSTONE BEDROCK, sandy (fine grained), low plasticity, hard, medium
moist to moist, iron staining noted, soluble sulfates noted, yellow brown and
gray (CL)
■ SANDSTONE BEDROCK, fine grained, silty, moderate cementation, very hard,
moist, iron stained, yellow brown (SM-SP)
NOTES
1 . The test holes were drilled on May 5, 1996, using a 4 inch diameter,
continuous flight, solid stem auger.
2. (10/12) Indicates location of penetration test as performed in this area. (10/12)
means that 10 blows with a 140 pound hammer, falling 30 inches, were
required to drive a two inch inside diameter sampler 12 inches.
3. The stratification lines represent the approximate boundary between soil types
and the transition may be gradual.
4. The locations of the test holes were approximately determined by pacing from
known property corners and using site plans made available to this firm. The
elevations of the test holes were approximately determined using a hand level.
The locations and elevations of the test holes should be considered accurate
only to the degree implied by the method(s) used.
5. Water level readings were made in the test holes at times and under conditions
stated. This data has been reviewed and interpretations made in the text of
this report. It must be noted, however, that fluctuations of the ground water
depth may occur because of seasonal variations in rainfall, temperature, and
other factors which may differ from those at the time the measurements were
made.
6. No free water was found in the test holes at the time of drilling.
Indicates free water level two days after drilling.
Soils and
M Materials Project No. 1-1977-01
LEGEND & NOTES
Consultants, Inc. Figure No. 3
980176
No Change under constant
pressure, due to wetting
m
2
e 1
O
C
0
•Ce
a 0
N
C
0
U 1
Water added
to sample
2
3
100 500 1,000 10,000 100,000
Load - psf
Sample of silty, sandy Clay from Test Hole 1 at depth 3 feet.
Natural Moisture Content 9.6% Natural Dry Density 110 pcf
•
Swell under constant
pressure, due to wetting
3
cn
0 1
co
0
7 0
_
C
0
0
v 1
Water added •
to sample
2 •
3
100 500 1,000 10,000 100,000
Load - psf
Sample of silty, sandy Clay from Test Hole 2 at depth 6 feet.
SNatural Moisture Content 8.2% Natural Dry Density 106 pcf
M Soils and
Materials SWELL - CONSOLIDATION Project No. 1-1977-01
Consultants, Inc. TESTS
Figure No. 4
PERCENT PASSING BY WEIGHT
(;111DIC) 0 0 0 0 0 `0' 0 0 CO 0 0
o o cl 3 —
. _
to fD N w 2" 1 O
n, 1 1/2 1 ---
.: m = �
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980_17F
Foundation Wall
\\\:..
Backfill - moistened
and compacted
Footing \
Polyethylene Moisture
Barrier
0 Soils and
Materials
Consultants, Inc. NOT TO SCALE
MOISTURE BARRIER DETAIL
Figure No. 6
980176
Foundation Wall
\\Waterproofing
\::\\
Slip joint between Backfill
slab and wall ` \
Slab i
— Building paper on top
o� of gravel.
=o .
•�CS'.o :o,:o.o•.!• Minimum 8" thick
layer clean gravel
\ (minimum size '/.").*
t Polyethylene
1
Six inches of compacted fill may be
placed under the system at the high
point to better allow the required
slope. The drain excavation, if
used, must not extend below a line Perforated drain pipe -
extending down at a 1 to 1 slope from the minimum 3" diameter. Minimum
outside bottom edge of the footing. slope of pipe and gravel should
be 1/8 inch per foot. Discharge
by gravity or mechanical means
to a positive outfall.
* Coarse Aggregate
Specifications for
Drain Gravel
Sieve Percent Passing
Size Sieve Size
1Y2" 100
1" 90-100
CM
0-15
Soils and 9801'��j '�■" 0-5
Materials
Consultants, Inc. NOT TO SCALE
DRAIN SYSTEM DETAIL
Figure No. 7
Polyethylene barrier to be sealed against
foundation wall with a mastic compound.
Joints also to be sealed. If desired, the
polyethylene barrier can be omitted if
the crawl space is properly vented. 1
/
Foundation Wall
J� Floor Joist
Backfill X///://////: Crawl Space
I
Footing ;P.' b:.; J Min. 6"
\vmorA\ I
Drain excavation must not extend ��~ r
below line extending down at a 1 to
1 slope from the inside bottom edge Min. 12"
of the footings. —1 �—
Perforated drain pipe - minim m 3 inch diameter,
bedded in minimum 0.75" gravel. Minimum slope
of pipe and gravel should be 1/8 inch per foot.
Discharge by gravity or mechanical means to a
positive outfall. The drain gravel should be tied to
the exterior side of the foundation at several points
(away from footing pads) to allow water accumulation
to travel to the drain system.
J \M Soils and
Materials
C(1..„)
Consultants, DRAIN SYSTEM DETAIL
Inc. NOT TO SCALE
Figure No. 8
980176
Brick or
Siding
Frame
Wall
5' Minimum
Wood or metal edging above top Rock or bark area with
or sod with weep holes in bottom downspout extended
to allow water flow out onto lawn. beyond edging.
Sod oaoo .o°.;U �.°.:p.;.u•;v:�.o o;�gep:o',
III III IIIIIIIII�IIIIIIUIIliOulllllmll111111 UIIIIII '
. �'.°.0i o'er �''•'
Non woven geotextile fabric.
Sloped away from foundation,
under edging and above sod
elevation.
Maintain designed slope away from foundation.
Minimum fall of 12" in the first 10 feet away
from the foundation is recommended.
Foundation Wall
Soils and
M Materials NOT TO SCALE
Consultants, Inc. LANDSCAPING DETAIL
Figure 9
0C S Soils and
M Materials PERCOLATION Project No. 1-1977-01
Consultants, Inc. TEST RESULTS
Table No. 1
980176
PERCOLATION TEST RESULTS
Percolation Depth Soil Type Percolation Rate
Hole in. (Lower Foot) {min./in.}
1 36 silty Clay No Movement *
2 36 silty Clay 60
3 36 silty Clay No Movement *
4 36 silty Clay No Movement *
* - indicates percolation rate exceeding the specifications of the Weld County
Health Department
Note - Percolation tests performed in accordance with the regulations of the Weld
County Health Department.
nSoils and
Materials PERCOLATION Project No. 1-1977-01
J Consultants, Inc. TEST RESULTS
Table No. 1
9801.76
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