HomeMy WebLinkAbout20192425.tiffLeft Hand Water District
10/22/2018
Steve & Stacy Gentry
Peter & Kristi Shattuck
16520 Essex Rd N
Platteville, CO 80651
Re: Highway 52 & WCR 5; North of 6594 CR S
Legal Description: PT NW4 33 2 68 LOT A REC EXEMPT RE -5065
Weld County Parcel ID: 131333200062
TO WHOM IT MAY CONCERN:
The property at the above legal description is within the "Service Area" of Left
Hand Water District. If all conditions and requirements are met, water
service may be available to the above stated area in the future.
Sincerely,
O747 ci7L,-
Christopher P. Smith, P,E.
General Manager
Left Hand Water District
P.O. Box 210 N Niwot, CO 80544-0210 r. Phone 303-530-4200 N Fax 303-530-5252 K www.lefthandwater.org
Date: November 9, 2018
Subject: Septic System Design, Gentry
Family Farm, 0 Weld County
Road 5, Weld County, Colorado
Job No.: 18-333
Mr. David Wolfer
11721 Elmer Linn Drive
Longmont, Colorado 80501
Dear Mr. Wolfer.
As requested, Hollingsworth Associates, Inc. has prepared the septic system for the proposed
homes and office building located at Gentry Family Farm, 0 Weld County Road 5 in Weld
County, Colorado.
Proposed Construction: It is planned to build a new five -bedroom home, a new four -bedroom
home, and an office building. The system will be designed for a five -bedroom residence, a four -
bedroom residence, and an office building (with an employee count of 9).
Site Conditions: At the time of our field investigation, the site was vacant. The site had a native
grass and weed cover. The ground surface sloped slightly from east to west with a change in
elevation of approximately 6 feet.
Subsoil Conditions: The subsurface conditions at the site, as indicated by exploratory test pits
TP-1 through TP-6, consisted of 12 inches of topsoil and 0 to 3 feet of medium stiff sandy to
very sandy clay, 0 to 9 feet of loose to medium dense clayey to very clayey sand which
occasionally grades into a very silty sand or a sandy clay, 0 to 3 feet of firm weathered
Hollingsworth Associates, Inc.
Geotechnical & Environmental Engineers 2875 W. Oxford Ave. #7 Sheridan, Colorado 80110
303-781-5188/fax 303-781-5224
claystone/sandstone overlying 0 to 6 feet of hard claystone/sandstone for the depth excavated,
10 feet. No free water was encountered in the test pits at the time of excavation. The test pits
were excavated with a rubber tire backhoe.
Septic System: The septic system was designed based on a five -bedroom, four -bedroom
dwelling. A design flow rate of 1,410 gal/day was determined from Table 2. The septic system
should consist of a 1,500 -gallon septic tank and a 2,820 square feet ieachfield.
Limitations: This report has been prepared in accordance with generally accepted soil and
foundation engineering practices in this area for use by the client for design purposes. The
conclusions and recommendations submitted in this report are based on the data obtained from
the profile hole drilled at the location indicated on the site plan and the proposed type of
construction. The nature and extent of subsurface variations across the site may not become
evident until excavation is performed. If during construction, fill, soil, rock, or water conditions
appear to be different from those described herein, this office should be advised at once so
reevaluation of the recommendations may be made. We recommend on -site observation of
excavations and foundation bearing strata by a representative of the soil engineer.
Sincerely,
HOLLLNGSWORTH ASSOCIATES, INC.
Lindsey Gulbrandsen, Staff Geologist
TRH: lg
Reviewed by: HH
Attachments
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Job No: 18-333
Site: Gentry Family Farm
Weld County, CO
LTAR(Table 9) 0.35 gallons/day/sqft
No: Bedrooms N/A
Flow rate: 1410 gal/day (Table 2)
Soil Treatment Area
A= Design Flow/LTAR pg.66
4029 sq feet
Adjusted Soil Treatment Area
Al= Soil Treatment Area x Size Adjustment Factors pg. 66
Septic Tank
Adj Factor -
0.7 for chambers Table 11
1 trench
Al=
2820 sqft
1,500 gallons (Table 8)
Infiltrator chambers
# of chambers=
12 sqft per chamber
235
25'
50'
93' TO PROPERTY LINE1
N
` \
Leachfeld: 8 rows of 30 chambers
Area: 2,820 sq ft
F[evatioo of Bed: 4981 fl
V.yr4 TP-3 +,�1
Mir .0 TP-4 . GeQ"ci
or
ID
`� ,
Base map provided by the client,
18-333
HOLI I`G$ OKTh ASSOCIATES
ceatecli auE vnamemasFsgs�ss
4980'
7
c 6C.+S!' T
4982'
4984'
44,"4.01;i31
FmFo. ! - i-
aEFJ r Rf ,gaa.a.M
w`GR
4986'
4988'
µ1ilmust$llry,j
��p #FG�sr,„—No unsuitable soil, disturbed or compacted soil
.•••'4 `'�
If pt.
�a3vo existing wells within 100 ft of treatment area
•IT -1
—Exploratory test pit
—Elevation contour line
Septic System Plan
Fig. I
A
1.500 gallon seEaictank
A
k
WEN/
XSCRI-'.or
DA —E
CLIENT:
ESTABLISH VEGETATIVE COVER
MR DAVID WOLFER
11721 ELMER LINN DRIVE
LONGMONT, COLORADO 80501
SE
LL u
ASSOCIATE
GeobchmgUEmn
2295 w word A
363-781-5 WS1ra.
3'
52'
120'
PLAN
not to scale
NATIVE BACKFILL
7
leN
4' i , 3'
InfUuator Quick4 Plus StandardClsnber
S rows of 30
Infiltrator Quick4 Plus
Standard Chamber
52'
4'
[ON A -A `�p►�l__lulumok,f,
A scale �...� , ! REG► �•,�—
leek _
rell Engineers
Stereldan, Cdaado 80110
2.5224
DESICESIM 7811
DRAWN TRH
REVIEWED TRH
DATE I119/18
4' i, 3' i/ 4'
SEPTIC SYSTEM
GENTRY FAMILY FARM
0 WELD COUNTY ROAD
WELD COUNTY, COLORADO
3'
JOB NO. 18-333
FIGURE 2
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