HomeMy WebLinkAbout1.03 Water Supply•
COLORADO
RIVER
igsv ENGINEERING, INC.
P.O. Box 1301
Rifle, CO 81650
Tel 970-625-4933
Fax 970-625-4564
Ms. Gaye Leo
PO Box 986
Silt, CO. 81652
June 28, 2000
RE: Leo Subdivision — Water Supply
Dear Gaye:
As Requested, Colorado River Engineering, Inc. has completed investigations to determine
the adequacy of the existing well at your property located on Taughenbaugh Mesa to serve three
homes as part of the proposed Leo Subdivision. It is our opinion that the well will provide a
reliable source of water supply based on the estimated demand level and available physical supply
of groundwater. We have prepared this letter report to summarize our findings and the proposed
water supply for the subdivision.
Background
The proposed Leo Subdivision is located on Taughenbaugh Mesa in Garfield County,
Colorado. The size of the property is about 52 acres situated in the western half of the SW/4 of
Section 20, Township 6 South, Range 93 West, of the 6'h P.M. as illustrated on the attached General
Location Map (Figure 1). Taughenbaugh Mesa overlooks the Colorado River to the North and is
bordered on the west and east by Beaver Creek and Helmer Gulch, respectively. The mesa and
subject property consists of sloping (6%±) pastures and historically irrigated hay crops with water
diversions originating from Beaver Creek.
The proposed subdivision will create 3 lots with about 42 acres remaining with the existing
home and the creation of two new 5± acre lots as shown on Figure 1. Each lot will be limited to one
single-family dwelling unit. The source of domestic water supply will be from a shared well. The
well will provide in-house demands and limited outside irrigation use. The well is an exieting
structure serving the residence constructed on the 42 -acre parcel. The well is registered as an
exempt structure with Colorado Division of Water Resources under Permit No. 221943 (attached).
An exempt permit is limited to maximum pumping rate of 15 gallons per minute (gpm), ordinary
use within three single-family dwelling units, no more than one acre of irrigation, and the watering
of domestic animals. Each dwelling unit will have wastewater treated through an Individual
Sewage Disposal System.
• •
The property is currently irrigated with 0.52 cfs in the Taughenbaugh Ditch. We understand
that this water right will be split among the three parcels. The preliminary plan map should identify
easements for any existing or required water delivery ditches, laterals, and pipes to service each lot.
Also, we understand that this water right is "junior in priority" and is typically administratively
curtailed in most years following the peak runoff months of Beaver Creek. We recommend that a
plat note be_added identifying that the irrigation water source is limited by physical availability.
Also, if any irrigation structures are to be shared, then a sharing agreement should be developed.
The remainder of this report addresses the domestic water supply to be provided by the well.
Water Demands
Water demands for the subdivision were estimated assuming each home would average 350
gallons per day for in-house uses. Outside irrigation water demands were included for lawns,
gardens, and landscaped areas and were estimated to be 3,000 square feet per unit, or 9,000 square
feet total. This is substantially Less than the 1 -acre (43,560 sq. ft.) allotted under the well permit and
shall serve as a conservation measure to minimize impacts to the groundwater resources. We
recommend that the 3,000 square feet limit be identified in either the subdivision covenants or as a
plat note. The unit irrigation water demand was estimated at 2.12 feet per year and an application
efficiency of 80%. Water use estimates also include 9 livestock units at 10 gallons per day per unit.
The attached Table 1 summarizes the estimated monthly water demands for the proposed
subdivision. The average annual diversion to meet these demands is 1.1-gpm with a peak monthly
demand of 1.7-gpm during the irrigation season.
The instantaneous peak demands from the three parcels could exceed the 15-gpm limit of
the exempt well permit. We recommend that each lot be required to provide a small storage tank
and booster pump to meet peak demands. The tanks should be sized at a minimum of 250 gallons
or up to 500 gallons if the full -irrigated area allotment is to be used.
The subdivision plat should identify easements for access to the well and water supply lines
to each lot. Also, a well sharing agreement should be developed to identify maintenance and cost
sharing responsibilities for the shared well and any shared delivery lines.
Physical Availability \c,t) Ni\j-,/1\
The existing well was drilled to a depth of 130 feet and encountered colluvium material
clays, volcanic rocks, and gravels that overlay the Wasatch Formation. The primary water -bearing
portion of the aquifer is at a depth of 90 to 100 feet and consists of sand, gravel, and cobbles
overlying the Wasatch Formation. The gravel lens can be seen in the exposed cut through Helmer
• •
the deposits that occur on mesas located south of the river in this portion of the County. The aquifer
is recharged from natural precipitation and from deep percolation of irrigation water on
Taughenbaugh Mesa.
The well was pump tested on April 25th, 2000 using the existing 7-gpm 1/2 horsepower pump
installed in the well. Well drawdown and recovery data is summarized on the attached Table 2.
The initial water level was measured at a depth of 89'-0" and provides approximately 41 feet of
drawdown capability (130' total depth — 89' static level). The water level dropped to about 2'±
within the first hour and a half and stabilized at 2.25' of drawdown after 21 hours. The pump test
was terminated after 24 -hours and recovery data was collected for an additional 24-hour period. As
shown in table 2, the well recovered to the initial static level. Given the minor drawdown amount
and the recovery data the well exhibits a yield in excess of the 7-gpm pumping rate. The well yield
is capable of meeting the peak average monthly demand of 1.7-gpm for the subdivision.
The long-term ability of the aquifer to serve the well on a year round basis is a function of
the size of the aquifer, recharge patterns, and other well pumping depletions. The pump test was
completed following the winter period and prior to irrigation water being diverted on to the mesa.
This period is typically when water levels are lowest for these types of aquifers. It is our opinion
that the underlying aquifer has substantial storage capabilities and will provide a reliable physical
supply given the large aerial extent of the Taughenbaugh Mesa combined with irrigation water
recharge and minimal well development in the area
Water System
The water system will be comprised of the shared well delivering water to individual water
storage tanks at each lot. The existing pump has the power to deliver water to all the lots. Each
amply line to the lots should have a minimum diameter of 1 -inch to minimize friction losses. The
construction of the delivery lines, tank, and tank level controls will be the responsibility of each lot
owner.
The water system will serve less than 15 residences or 25 people and thus will not be
regulated by the Colorado Department of Public Health and Environment. However, water quality
tests were taken for Bacteria and Nitrate/Nitrite during the pump test. Results from Grand Junction
Laboratories (attached) indicated no presence of bacteria or nitrites. The total nitrate measured was
1.72 mg/1 and is less than the 10.0 mg/1 limit set by the health department for regulated systems.
Summary
The proposed uses of the well are within the limits of the exempt well permit. The well has
sufficient physical yield and availability to meet the total demands of the subdivision. The
following lists summarizes recommendations presented in this report:
3
• •
1. Identify and develop easements for ditches, laterals, or pipelines for delivery of
irrigation water rights in the Taughenbaugh Mesa Ditch. Add a plat note identifying
limited availability from the surface rights due to administrative curtailment.
2. The Plat or covenants should identify the use of the shared well for use in 1 -single
family dwelling unit and 3,000 square feet of irrigation per lot.
3. Each lot will be required to develop individual storage and booster pump systems to
provide daily peak demands. Easements should be provided to access the well and to
construct water delivery lines to the two 5 -acre parcels. A well sharing agreement
should be developed.
If you have any questions, please do not hesitate to call 970-625-4933.
CM:cm
Encl:
CC: Caloia & Houpt, P.C.
WatSuply.doc
Sincerely,
Christopher Manera, P.E.
4
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Residential In-house ac -ft 0.100
Lawn irrigation ac -ft 0.000
Livestock ac -ft 0.009
Totalsac-ft 0.108
--- �
gpm 0.8
CONSUMPTIVE USE
Residential In-house ac -ft 0.010
Lawn irrigationac-ft 0.000
Livestock ac -ft 0.009
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• •
Table 2
Leo Subdivision
Pump Test - Exempt well 221943
Date
Time
Water Level
Total Drawdown
Total Time
Flow
Note
(feet)
(in)
(ft)
(hrs:min:sec)
(gpm)
25 -Apr -00
11:32 AM
89
0
0.00
0:00:00
7
Pump on
25 -Apr -0O
11:34 AM
89
10
0.83
0:02:00
25 -Apr -00
11:35 AM
90
0
1.00
0:03:00
25 -Apr -00
11:36 AM
90
3
1.25
0:04:00
25 -Apr -00
11:37 AM
90
4
1.33
0:05:00
25 -Apr -00
11:38 AM
90
6
1.50
0:06:00
25 -Apr -00
11:43 AM
90
10.5
1.88
0:11:00
7
25 -Apr -00
11:53 AM
90
11
1.92
0:21:00
25 -Apr -00
1:10 PM
91
0
2.00
1:38:00
7
25 -Apr -00
3:48 PM
91
0.5
2.04
4:16:00
25 -Apr -00
10:43 PM
91
3
2.25
11:11:00
26 -Apr -00
8:42 AM
91
3
2.25
21:10:00
7
26 -Apr -00
11:52 AM
91
3
2.25
24:20:00
26 -Apr -00
11:54 AM
91
3
2.25
24:22:00
Pump Off
26 -Apr -00
11:57 AM
90
3
1.25
24:25:00
26 -Apr -00
11:59 AM
89
11
0.92
24:27:00
26 -Apr -00
12:00 PM
89
9.5
0.79
24:28:00
26 -Apr -00
12:02 PM
89
7
0.58
24:30:00
26 -Apr -00
12:18 PM
89
5
0.42
24:46:00
26 -Apr -00
2:47 PM
89
3
0.25
27:15:00
27 -Apr -00
11:00 AM
89
0
0.00
47:28:00
Water sample
5/16100 3:20 PM
Colorado River Engineering, Inc. pumptest.xls
FORM NO.
SWS-42
07/93
STATE OF COLORAR .For
OFFICE OF THE STATE ENGINEER
818 Centennial Bldg., 1313 Sherman St, Denver, Colorado 80203
(303) 866-3581
Office Use only =
" ... - '
3
' �' '.
MAR 0 6 2000
- IVA(ER RESG;RCES
STATE ENGINEER
^,OLO
/may/&
*,',-t; / I 1
3/((ZpoO a:3"•f4
4, ZQ,Ov
az- puJL # C.<a`?
' PRIOR TO COMPLETING FORM, SEE INSTRUCTIONS ON REVERSE SIDE
1. APPLICATION FOR WELL LOCATION AMENDMENT
WELL PERMIT NUMBER aaJ s4/ 3
2. WELL OWNER
g, /,
NAME(S) &$i r Lev
Mailing Address , • o , B0?<
City, St. Zip ..1--.071 g'.).4_2---
Phone (1. v.. ) & as - -2 11 3
3. ACTUAL WELL LOCATION: COUNTY..6.f`.r..1lr)
OWNER'S WELL DESIGNATION
..D Rifle c ........�a..s0.....
(City) (State) (Zp)
Twp. ' .Sv t.A. . , Range C%3 ..V ).S'71-• , (a P.M.
(North or South) (East or West)
Section Line, ••41Dd Ft. from 2;};+-- Section Line.
(East or West)
Lot Block Filing (Unit)
4-Nvf-c.4 CLI-re\it..
(dress at well locafon)
fel W 1/4 of the 51,x.1 1/4, Sec. 2-0
Distances from Section Lines
2100
Ft. from
.g ...50Lkt-1i....
(North or South)
Subdivision
4. The location of the existing well needs to be amended for the following reason(s): (Attach appropriate documentation as necessary)
7 r 1111.....5 r1 -e. L .46 a../. e..red 5..L.i..9i ±..1y b' '4,-1 Ile rs.
5. I (we), the above listed owner(s) own the well described herein. I (we) have read the statements made herein,
know the contents thereof, and state that they are true to my (our) knowledge. (Pursuant to Section 24-4-104 (13)(a) C.R.S.,
the making of false statements herein cor 'itutes perjury in the second degree and is punishable as a class 1 misdemeanor.]
Name\T•rtle (Please type or print) .
i} y e LE 0
Signature
Date
—3/.2--/z-a7)
Z
APPROVED
TO POLICY
flier fr a iia
alieillio.A.".....
State Engineer
Court Case No. Div.
FOR OFFICE USE ONLY
FOR A CORRECTION OF LOCATION! PURSUANT
MEMORANDUM 93-1 DATED JULY 7, 1993
'Y'?1 A c
• A///1/ O0
Date
MD
BY
Co. 2 3 WD . 4_.5"--- Basin ..
APR- 7-CSFF' 12:11 F.vi
FA.:
;;fl,
Jjj.
WELL CONSTRUCTION AND TEST REPORT FOR OFFICE USE ONLY
STATE OF COLORADO, OFFICE OF THE STATE ENGINEER
.
WELL PERMIT NUMBER 221943/MH-37642
2.
Owner Name(s) : Gaye Leo
Mailing Address : P.O. Box 986
City, St. Zip : Silt, Co. 81652
Phone (970) 876-5850
APPROVAL # GWS31-91-03
3.
WELL LOCATION AS DRILLED: NW 1/4 SW 1/4 Sec. 20 Twp. 06S Range 93W
DISTANCES FROM SEC. LINES:
2400 ft. from South Sec. line. and 900 ft. from West Sec. line. OR
SUBDIVISION : LOT BLOCK FILING(UNIT)
STREET ADDRESS AT WELL LOCATION :
4
GROUND SURFACE ELEVATION ft. DRILLING METHOD Air Rotary
DATE COMPLETED 02/04/00 TOTAL DEPTH 130 ft. DEPTH COMPLETED 130 ft.
5. GEOLOGIC LOG :
6. HOLE DAM. (in)
FROM (ft)
TO (ft)
Depth
Type of Material (Size, Color, and Type)
9.0
0
31
000-090
Clays, Volcanic Rocks
6.5
31
100
0§0-100
Gravels
5.
100
130
090-125
Clays
7. PLAIN CASING
125-130
Wasatch Formation
OD (in)
Kind
Wall Size
From (ft)
To (ft)
7.0
Steel
0.240
-1
31
5.5
Steel
.188
21
90
4.5
Steel
.188
100
120
PERF. CASING : Screen Slot Size :
5.5
Steel
.188
90
100
4.5
Steel
.188
120
125
WATER LOCATED : 90 - 100
REMARKS :
8. Filter
Material:
Size :
Interval
Pack
:
9. Packer Placement
Type :
Depth :
10. GROUTING RECORD :
Material
Amount
Density
Interval
Placement
cement
3 sks
16 gal
10-30
poured
11. DISINFECTION : Type : HTH Amt. Used : 2 oz.
12. WELL TEST DATA : [ ] Check Box If Test Data is Submitted On Supplemental Form.
TESTING METHOD : Air Compressor
Static Level : 85 ft. Date/Time Measured : 02/04/2000 Production Rate : 8+ 9Pm•
Pumping Level : Total ft. Date/Time Measured : 02/04/2000 Test Length : 2 hrs.
Remarks :
i haw reed the staienwnts made herein and know the conBen� thereof,
J. petJmy h the second degree and ie punishabb as a class 1 misdemear
CONTRACTOR : Shelton Drilling Corp.
Mailing Address - P 0 Box 1059 Ba
and that they are true to my to ew1odge. (Pursuant to Samson 244104 (13)(a) CRS, the making
r.)
Phone : (970)
It CO. 81621 Lic. No. 109
of fats° statements ConstieAes
927-4182
Name / Title (Please Type or Print)
Wayne Shelton / President
Signature
Date 02/18/00
FILE COPY
t OM NO.
G'NS- 11
07/:13
STATE OF COLORAD
OFFICE OF THE STATE c GWEER
818 Centennial Bldg.. 1313 Sherman SI. Denver, Colorado 80203
(303) 8664581
i For Ottica t c,l -.'^' -r; .�.,
Z.,,e„ . if .v, i ..
�,u
11 TO
ST NE o�RS
,GLEWELL
.
."'",--- RECEIVED
-= '1*
MAR 0 6 2000
i :; :.
AA ; t. ri RE SOURCES
SLATE ^ ENGINEER
LO
s, i '. .
Pi'll0R TO COMPLETING FORM, SEE INS THUCTIONS ON REVERSE SIDE
CHANGE IN OWNERSHIP/ADDRESS / LOCATION
PERMfT, UVESTOCK TANK OR EROSION CONTROL DAM
1.
NEW OWNER
NAME(S)• . Gaye....Leo
Mailing Address P.O. Box 986
Silt, Co. 81652
City, St. Zip
Phone (..9.7.Q ) $76-5850
2.
THIS CHANGE IS FOR ONE OF THE FOLLOWING:•
Y �l
❑
WELL PERMIT NUMBER 221943
UVESTOCK WATER TANK NUMBER
EROSION CONTROL DAM NUMBER
3.
WELL LOCATION: COUNTY Garfield OWNER'S WELL DESIGNATION _,. _ ...... .
(Address) (City)
NW 1 /4 or the SW 1/4. Sec.._ 20 .Twp._ 6 ❑ N. « EIS., Range.... 9 3
......... ❑ E. Of
Distances from Section Unes 2400 Ft. from ❑ N. « MIS. Line, 900 Ft. from
(State)
❑
W. 6
E. « S
(Gp)
P.M.
W. Une.
Subdivision Lot Block _ Filing (Unit)
4.
UVESTOCK TANK OR EROSION CONTROL DAM LOCATION: COUNTY _
1/4, Sec. Twp ❑ N. or
S., Range ❑ E. or ❑ W. P.M.
5.
The
The
I
above listed owner(s) say(s) that he (they) own the structure described herein.
existing record is being amended for the following reason(s):
I Change in name of owner. ❑ Change in mailing address. 14 Correction of location.
6.
I (we) have read the statements made herein, know the contents thereof, and state that they are true
to my (our) knowledge.
[Pursuant to Section 24-4-104 (13)(a) C.R.S., the making of false statements herein constitutes perjury In
the second degree and is punishable as a class 1 misdemeanor.)
Namerritle (Please type' or print)
Gil ye E
Signature
al)
az ic...."...40
Data
z/7/�0p
FOR OFFICE USE ONLY
ACCEPTED AS A CHANGE IN OWNERSHIP
AND/OR MAILING ADDRESS.
'L
' ! of " (17,.2 /V 0
_
State Engineer BY Date
Court Case No. Div. Co. WD Basin MD Use
• •
JOHN C. KEPHART & CO.
LA
-
4At
4ItS
4osNORTH AVENUE • pnowc 242-7618 • GRAND JUNCTION, COLORADO a1so1
ANALYTICAL REPORT
Recieved from: Leo Well, Taughenbaugh Mesa Colorado River Engineering
Chris Manera Chris Manera
PO Box 1301
Rifle, CO 81650
970 984-0311
3531 water
CustomerNo.Labvr�v�m^. Sample
Date Receive4 / 28/ 00 Date Reported 5 / 10/ 00
GJ Lab No.: 3531 Test Date Lower
PWSID#: N/A Method Tested Limit
County: Garfield of Detection
Date: 04 / 27/00 AM11:00
Sys. Name: Leo Well, Taughenbaugh Mesa
Sys. Add.: PO Box 1301
Contact: Chris Manera
Culled. by: Chris Manera
(X)Treatmt: Raw X
Chlorinated
Other
Source: Groundwater (well)
Location:
Sample Pt.: hose bib
Total Coliform Bacteria:
0 colonies/100m1 SM9222B 4/29/2000 1
Nitrate(N) 1.72 mg/1 D386790B 5/8/2000 0.01
Nitrite(N) 0.00 mg/1 D386790B 4/29/2000 0.01
Nitrate/Nitrite-N 1.72 mg/l D386790B 5/8/2000 0.01
NOTES: Samples were not taken by, or composited in lab. X
Method references are SM=Standard Methods, D=Annual Book of ASTM
Standards, EPA=EPA Methods, Metals Supplement.
mg/l = milligrams per liter Lab Dir.: Brian S. Bauer