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APPLICATION FOR
1 PRELIMINARY PLAT APPROVAL
OF
SUBDIVISION NUMBER TWO
LOS AMIGOS RANCH
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1 February 17, 19$2
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TABLE OF CONTENTS
Subdivision Number Two
Preliminary Plat Application
LOS AMIGOS RANCH
VOLUME ONE PAGE
I. INTRODUCTION 1
II. SUBDIVISION SUMMARY FORM 3
III. BASIC INFORMATION 4
IV. PHYSICAL INFORMATION
A. GEOLOGY 9
B. SOILS 13
C. VEGETATION 14
D. WILDLIFE 14
V. GRADING & DRAINAGE PLAN 16
VI. UTILITY PLAN
A. WATER 19
B. SANITARY SEWAGE DISPOSAL 22
C. UNDERGROUND UTILITIES 23
MAPS
M1 VICINITY MAP
M2 PRELIMINARY PLAT
M3 GEOLOGY
M4 SOILS
M5 SLOPE
M6 VEGETATION
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PRELIMINARY PLAT APPLICATION
LOS AMIGOS RANCH
SUBDIVISION NO. TWO
I. INTRODUCTION
This application requests approval of Subdivision
Number Two Preliminary Plat of the Los Amigos Ranch,
Planned Unit Development (PUD). Subdivision No. One con-
sists of the 96 unit Auburn Ridge apartment complex on
14.63 acres across County Road 114 from Colorado Mountain
College.
Subdivision Number Two contains 201.6 acres and con-
sists of 53 single-family lots. The design and layout of
Subdivision Number Two is consistent with the PUD Master
Plan which was approved by the Garfield County Commission-
ers in Resolution No. 81-358 on Tuesday, December 1, 1981.
Subdivision Number Two represents a resubdivision of the
initial Subdivision Number Two, of which Final Plat, Filing
One was recorded on March 3, 1980. Ir addition, this resub-
division will render null and void the Subdivision
Improvements Agreement which was recorded on March 5, 1980.
Following approval of the preliminary plat, the final
platting of Subdivision Two will take place in three sep-
arate phases or filings as follows:
Phase One
Phase Two
Phase Three
10 lots
25 lots
18 lots
53 lots
The timing for application of phase one, final plat approv-
al will occur shortly after preliminary plat approval. The
timing of subsequent applications for phases two and three
has not been established at this time.
This application is in two separate bound reports and
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a separate set of drawings. The first report contains the
application, the preliminary plat maps and written mater-
ial. The second report contains proposed Declaration of
Restrictive Covenants and Design. Requirements and Guide -
II lines as required in the subdivision process. The separate
set of drawings also includes the official plat and addi-
tional supporting technical maps and drawings specified in
IIthe Garfield County Subdivision Regulations.
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Preparation of the Preliminary Plat Application was
the responsibility of Resource Managment, Inc. Schmueser
and Associates, Engineers and Lincoln-DeVore Engineers also
participated in preparation of the application.
II. SUBDIVISION SUMMARY FORM
Garfield County Type of Subdivision:
Request for Exemption
Date 2/16/82 Preliminary Plan XX
Final Plat
Subdivision Name: Filing
Los Amigos Ranch
Location of Subdivision: TOWNSHIP 7 RANGE 88 SEC. 5 & E 1/2 6
Owner(s) NAME Thomas E. Neal & James A.R. Johnson
ADDRESS c/o Los Amigos Ranch, Box 1506, Glenwood Springs, Co 81601
Subdivider(s) NAME Malcolm Wall
ADDRESS Same as above .
Designer NAME Resource Management , Inc .
ADDRESS P.O. Box 11536 , Aspen , Co 81612
Number of
Type of Subdivision Dwelling Units
Area % of
(Acres) Total Area
(0 Single Family 53
Apartments
( ) Condominiums
( ) Mobile Home
( ) Commercial N.A.
( ) Industrial N.A.
161.1 79.9.
Street 21.2 10.5
Walkways
Dedicated School Sites
Reserved School Sites
Dedicated Park Sites
Reserved Park Sites
Private Open Areas 5.4 2.7
Easements 13.9 6.9
Other (specify)
Total
201.6 100%
Estimated Water Requirements 43,670 Gallons/day
Proposed Water Source Wells (ground water)
Estimated Sewage Disposal Requirement 10,500 Gallons/day
Proposed Means of Sewage Disposal Septic tank/Spring Valley San. District
ACTION:
Planning Commission Recommendation
Approval ( ) Disapproval ( )
Remarks
Date , 19 .
Board of County Commissioners
Approval ( ) Disapproval ( )
Remarks
Date , 19
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III. BASIC INFORMATION (4.02.01; K.1-9)
A. Subdivision Name: Los Amigos Ranch
B. Owner: Thomas E. Neal
James A.R. Johnson
Address: c/o Los Amigos Ranch
P.O. Box 1506
Glenwood Springs, CO 81601
(303) 945-9797
C. Organization preparing the preliminary plat:
Resource Management, Inc.
P.O. Box 11536
Aspen, CO 81612
(303)925-6615
D. Adjacent owners' names and address:
1. W.K.P., Inc., P.O. Box 1796, Aspen, Colorado 81612.
2. Lyons, Harold R. & Marianne E., 4206 100 road,
Carbondale, Colorado 81623.
3. Herring, Albert T. & Marie A., 0596 County Road 113,
Carbondale, Colorado 81623.
4. Becker, Charles J., 0670 266 Road, Rifle, Colorado 81650.
5. Hall, Jack L. & Naomi E., Box 606, Glenwood Springs,
Colorado 81601.
6. Reynolds, William & Renwen, Inc., Box 1666, Boulder,
Colorado 80302.
7. Dodson, Stanley L., Box 248, 0033 Marand Road, Glenwood
Springs, Colorado 81601.
8. Mobile Assoc., Box X, Basalt, Colorado 81621.
9. Scott lard Ltd., Suite 103 First National Bank Building,
Pueblo, Colorado 81003.
10. Dunkel, Lenore E., 2203 Bennett Avenue, Glenwood
Springs, Colorado 81601.
11. Scottland Ltd., Suite 103 First National Bank Building,
Pueblo, Colorado 81003.
12. Hue Mart Corporation, 6822 Highway 82, Glenwood Springs,
Colorado 81601.
13. Fuller, Mary Lynn & John Jr., 0575 West Bank Road,
Glenwood Springs, Colorado, 81601.
14. Rogers, Diane. Marie, 1836 E. 8th Avenue, Mesa, Arizona
85201.
15(a). Slaterley, William R. & Judith J., Rt. 1 Box 139,
Glenwood Springs, Colorado 81601.
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15(b). Sorenson, Gordon C. & Margaret J., Box 786, Glenwood
Springs, Colorado 81601.
15(c). Boyles, Jake 0. & Evelyn F., 6296 Highway 82,
Glenwood Springs, Colorado 51601.
15(d). Coryell, patrick B., 6931 State Highway 82,
Glenwood Springs, Colorado 51601.
16. Crull, Dennis R. & Penny K., Box 610, Glenwood Springs
Colorado 81601.
17. Ryman, Richard W., 4728 154 Road, Glenwood Springs,
Colorado, 81601.
18. Witte, Eddie C.J. & Leola M., 4698 County Road 154,
Glenwood Springs, Colorado 81601
19. Smith, Charles C. & Barbara A., 5633 W. County. Road
#52E, Bellvue, Colorado 80512.
20. Hughes, David J. & Norma R., 2558 Highway
Springs, Colorado 81601.
21. Kirkham, Analee, 4602 County Road 154,
Colorado 81601.
22. Kirkham, Analee, 4602 County Road 154,
Colorado 81601.
23. Rose, James L, Box 566, Glenwood Springs,
81601.
24. Jammaron, Leo, 4915 Highway
Colo9rado 81601.
25. Jackson, Carter T. & Louise
Springs, Colorado 81601.
26. Ould, A.W., c/o George William Ould, N. 1929 Barker
Road, Greenacres, Washington 99016.
27. Ould, A.W., c/o George William Ould, N. 1929 Barker
Road, Greenacres, Washington 99016.
28. Land changing hands.
29. Kindall, Harmon H.
30. Kindall, Harmon H.
31. Kindall, Harmon H.
32. Miller, Moffatt, Van Pelt, Main, Bier.
33. Ould, William George, North 1929 Barker Road,
Greenacres, Washington 99016.
34. Foster Petroleum, Box 729, Bartlesville, Oklahoma 74003.
35. Foster Petroleum, Box 729, Bartlesville, Oklahoma 74003.
36. Foster Petroleum, Box 729, Bartlesville, Oklahoma 74003.
37. Colorado Mountain College.
38. BLM.
39. BLM.
82,
Glenwood
Glenwood
Glenwood
Springs,
Springs,
Colorado
82, Glenwood Springs,
Van K., Box 1137, Glenwood
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E. Uses, Acreages:
Single-family 161.1 acres
Streets & Roads 21.2 acres
Utility Easements 13.9 acres
Recreation/
Greenbelt/
Open Space
79.9% of total area.
10.5% of total area.
6.9% of total area.
5.4 acres 2.7% of total area.
F. Terms of public use dedications:
Streets in Los Amigos Ranch Subdivision Number Two will be publi��
dedicated roads. There are no public dedication sites in
Subdivision Number Two.
G. Terms of Proposed Covenants - Los Amigos Ranch will be gov-
erned by Declarations of Protective Covenants, and physical
development will be regulated by the Los Amigos Ranch
Design Requirements and Guidelines of which draft copies
are included in this application.
H. Zoning Compliance - as per Los Amigos Ranch P.U.D. Zoning
District Map and Area and Bulk Requirements
ZONE DISTRICT MAP SUBDIVISION #2
1. Permitted/Additional Uses: Regulated by Building
Single -Family Dwellings Permits
Accessory Uses --
Churches, community
Services, Nursery,
School Site, Home
Occupation as Conditional.
2. Minimum Lot Area:
65,000 Sq.Ft.(1.5 acres)
Maximum Lot Coverage:
10% (6500 Sq.Ft.)
Setbacks --to be specified
at time of final plat by
designating building envelopes.
Height --30 feet.
Smallest Lot in Subd.
65,000 Sq.Ft.(1.5 acres)
Regulated by Building
Permits
To be specified on final
plat
Regulated by Building
Permits
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Maximum Floor Area Ratio:
0.15 (for structure) to
1.0 (lot size)
Regulated by Building
Permits
I. Amount of non-residential floor space --none.
J. Number of non -single family residential. off-street parking
spaces --none.
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IV. PHYSICAL INFORMATION (4.02.03)
A. Geology --Prepared by Lincoln DeVore as follows.
B. Soils --Prepared by Lincoln DeVore as follows.
C. Vegetation --Prepared by Resource Management and based on
information from the U.S. Soil Conservation Service as
follows.
D. Wildlife --Prepared by Resource Management and based on
information from the Colorado Division of Wildlife as
follows.
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Lincoln DeVore
1000 West Fillmore St.
Colorado Springs, Colorado 80907
(303) 632-3593
Home Office
Los Amigos Ranch
P.O. Box 1506
Glenwood Springs, Colorado 81602
ATTN: Malcom Wall
February 5, 1982
Re: File No. GS -740
Preliminary Geologic Hazards Investigation for
Los Amigos Ranch P.U.D., Garfield County, Colorado
Dear Mr. Wall:
Personnel of Lincoln-DeVore completed a preliminary geologic
hazard site inspection on the above referenced property on
September 5, 1978, in order to identify and define geologic and
soils constraints which may effect the development. A set of
three maps were prepared in connection with this report. The set
of three maps were based on a regional study done by
Lincoln-DeVore for Garfield County in 1975 under the provisions
of Colorado House Bill 1041. The House Bill 1041 mapping was
amended and added to, to prepare the set of maps for this site,
but the set of three maps which accompany this study must still
be considered as preliminary in nature. The three maps are:
Plate I - Preliminary Geologic Map; Plate II - Preliminary Soils
Hazards Zone Map and; Plate III - Preliminary Slope Hazard,
Floodway and Stability Map.
The scope of this present work consisted of 1) the tracing of
the Preliminary Geologic Map to a new topographic base map, and
2) the re -issuance of the original letter (dated September 14,
1978) describing the geology and hazards of the site. No addi-
tional site reconnaissance was conducted.
Geologically the site could be described as an upland mesa,
formed by basalt flows (Tb) (see Plate I) which were extruded
during the down cutting of the Roaring Fork Valley. These flows
covered the.Maroon Formation (PPm) (see Plate I), a thick
sequence of red interbedded sandstones, siltstones, and shales
which can be seen outcropping along the southwestern edge of the
site. The basalt flows also partially covered the Eagle Valley
Evaporite (Pev) in the southern portion of the site. The Eagle
Valley Evaporite locally consists of white to grey gypsum with
widely spaced fine grained sandstones and dark grey shales.
Colorado
9
Pueblo, Colorado Grand Junction, Colorado
Glenwood Springs, Colorado Evanston, Wyoming
Los Amigos Ranch
February 5, '1982
Page -2-
The following discussion of the engineering considerations of
these three formations is general in nature.
The Eagle Valley Evaporite (Pev) has undergone several types of
deformation which has resulted in a typical chaotic internal
structure. The contortion and deformation of the incompetent
materials of this formation dictates that wherever it is exposed
it must be considered as potentially unstable. Other hazards
associated with this formation include potential solution, hydro -
compaction and the presence of corrosive minerals.
The Maroon Formation (PPm) is highly fractured and, therefore,
easily eroded which provides an excellent source of material for
rockfall and debris flows when exposed on steep slopes. These
hazards are only present along the steep valley sides on the west
and southwest boundary of the site. Soils derived from the
Maroon formation may be susceptible to potential subsidence and
hydrocompaction.
The basalt flows (Tb), which underlie the majority of the site,
are dark grey, highly fractured, vesicular basalts attaining
several hunderd feet in thickness. The major hazard associated
with the basalt is rockfall which is present on the steeper slo-
pes below the cliff -like palisades along the Roaring Fork Valley
in the west and southwest edges of the site,.and along the
outcrops near the eastern boundary. Another large rockfall area
is present in the south central portion of the site just north of
the Colorado Mountain College access road.
Another slope stability problem in the presence of a moderate
sized landslide (Qls) was noted at the base of the palisade bet-
ween the two major drainage gullies just north of where they
intersect. This slide appears fairly old and moderately stable
but, without specific analysis, should be considered potentially
unstable.
The palisades which occur throughout the proposed development area
should be considered as potentially unstable and a minimum set-
back from the edges for buildings should be established prior to
construction.
The basalt bedrock appears to outcrop or be present at a shallow
depth throughout the majority of the site and wherever it is
encountered close to the surface will affect both construction
and excavation and may require blasting for removal. The shallow
bedrock is highly fractured and permeable, which will affect the
potential for individual septic systems and may necessitate the
use of a central septic system.
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Amigos Ranch
February 5, 1982
Page -3-
Surficial deposits mapped as colluvium (Qc) have potential
hazards which are dependent on the formations from which they are
derived and their modes of deposition. Colluvium, derived from
the Maroon formation, is mainly gravity transported and will be
susceptible to potential subsidence due to hydrocompaction only,
whereas colluvium derived from the Eagle Valley Evaporite will be
susceptible to solution, hydrocompaction and the presence of
corrosive minerals.
Alluvial deposits mapped as terraces (Qt1_2) consist mainly of
well rounded sands and gravels and have no inherent hazards except
where they overlie incompetent members of the Eagle Valley
Evaporite, which could cause them to be potentially unstable.
Sands and gravels also make up the deposit which surrounds the
Roaring Fork River labeled (QAL). The alluvial deposit mapped as
(QAL) in the eastern part of the site, however, consists mainly
of sand, silt and clay deposited by stream action. Expansive
clays and/or consolidating silts may be encountered in this
eastern alluvial area. Another geologic feature mapped as an
alluvial fan (Qf) was noted just south of the site but will not
affect the proposed developement.
Two major gullies and several minor ones were inspected to deter-
mine their potential for flooding and debris flows. The evidence
indicates that significant stream flow in most of the gullies
will exist only during and after torrential rains. The upper
part of the drainage basins are fairly flat, cultivated, and
cross the highly fractured and permeable basalt flows which tends
to reduce runoff to a level far below that which would normally
be expected; however, the potential for flooding within the
gullies does exist and has been mapped as floodways (fw) (see
Plate III). The lower part of the drainages become fairly steep
and contain considerable quantities of debris. Close inspection
of these gullies revealed no recent debris flow activity, and
actually very little potential for debris flows. In all the
areas of the proposed development which are located on the
uplands, the flood hazard to those areas is almost nonexistent.
There is a potential for hazards to exist for any roads and
dams placed in the area of the gullies; these must be designed
for the relevant peak flows and channel configurations.
Site specific studies are recommended in areas of proposed
construction which contain geologic hazards, at which time speci-
fic mitigation procedures can be outlined.
The following legend summarizes the geologic units included on the
Preliminary Geologic map.
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Amigos Ranch
February 5, 1982
Page -4-
Qal
Qc
ALLUVIUM (Quaternary) Stream deposited material.
Sand and gravel along Roaring Fork River; sand,
silt, and clay in eastern portion of site.
COLLUVIUM (Quaternary) Gravity transported
hillside deposits, including coalescing debris
fans. (Qf)
Qls LANDSLIDE (Quaternary)
Qt1, 2
Tb
PPm
TERRACE GRAVELS (Quaternary, subscripts indicate
relative age, 1 is younger) Old stream deposits
lying above present day water levels.
BASALT FLOWS (Tertiary) Dark grey, olivine
basalt, hard, vesicular, columnar jointing in places,
commonly fractured, weathered surfaces, brownish.
MAROON FORMATION (Permian - Pennsylvanian)
Reddish, arkosic sandstone with siltstone,
claystone, and some conglomerate and limestone,
current depositional structures common.
Pev EAGLE VALLEY EVAPORITE (Pennsylvanian) Gypsum and
dark grey shale, and mixtures of silt and salt;
chaotic internal structure, yellowish -grey weathered
surfaces, susceptibleto erosion and solution.
This description of the geologic characteristics of the site is
still applicable. If there are any questions please contact
Lincoln-DeVore at any time.
Respectfully submitted,
LINCOLN-DeVORE TESTING LAB., INC.
By: Joh' W. im elrei 4,
Prof-ssional Geolog.it
4,
By: Michael T. Weaver
Professoinal Geologist
JWH/ llm
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Lincoln DeVore
1000 Wes! FilImorn St
Colorado Sarongs, Colorado 80907
(3031632-3593
Home Ottrce
Summary of Preliminary Percolation Tests
Completed by Lincoln-DeVore on May 27, 1.979
Rate
Test Number Minutes Per. Inch Notes
1 75 Stiff Clay
2 10 Basalt at 9 feet
3 45 Basalt at 7 feet
4 40 Silty Clay
5 15 Clayey Sand
Respectfully submitted,
LINCOLN-DeVORE TESTING LABORATORY, INC.
By: �.�! / _ ( /1, ,,,�.
Michael T. Weaver/
Professional .Geologist
MTW/kmp
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1.41101way 5:) West
PufitIO. Coll) 8;00:i
(303) 546.1 150 •
P t� f.k„ t4?7
Giunwuu'i Sit+niys. Gcdo 81601
(303) 945-6020
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109 (-Iry ,hunt Plaza
Monlru ;t,, Colo 81401
(303) 249-7838
PO fox 188,2
Grand Junction, Colo 81501
(303) 242 8068
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P O. t3ox 1643
Hock Springs. Wyo 82901
(307) 382-2649
Resource Management inc.
C. VEGETATION: The Los Amigos Ranch property con-
tains agriculturally related plant materials and
native vegetation consisting of pinion/juniper,
sage and meadow grasses. Over half of the Los
Amigos land is pinion/juniper. To avoid exposing
development to public views by locating in open
meadows, most of the single-family units are lo-
cated within the pinion/juniper zone. Losses of
the pinion/juniper cover are kept to a minimum by
limiting building areas to 3000 square feet and
aligning roads to as near natural grade as poss-
ible. In addition, utilities are intended to be
underground and located in common easements
aligned next to roads.
Areas of existing native vegetation, includ-
ing pinion/ juniper, sage and meadow grass, if
outside a building site and regardless of owner-
ship, are protected against removal or impacts
such as would be caused by the keeping of horses
- see Draft Master Declaration of Protective
Covenants - SectionXIII.
D. WILDLIFE: Wildlife conditions on the Los Amigos
Ranch Property, particularly the area incorporated
in Subdivison Number Two, were investigated by
Mr. Rick Adams of the Colorado Division of
Wildlife. His site investigation took place during
the first week of February 1982, and the pertinent
points of his conclusions on wildlife conditions
and impacts from development follow. Current ac-
curate mapping of wildlife characteristics is
not available, and since the HB 1041 wildlife
maps are out of date, maps have not been included
in this application.
1. An estimated 300 mule deer winter in and
around the Los Amigos Ranch property. Twenty-
one deer were actually seen on the site
inspection.
2. Sage Grouse likely winter in the areas where
sagebrush is prevalent, although, they are
not as numerous as in the past.
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3 The area is not known to host any endangered
species.
4. Recommendations to accompany development
approval.
a. Discourage construction of fences. If
fences are built, maintain a maximum
height of 42 inches, and the top of the
fence should be wood (or other material
that would not harm wildlife jumping over
fences) .
b. Discourage the use of non -indigenous land-
scaping plants. Wildlife often seek out
these plants for food and eventually de-
stroy the plants. Purchasers of property
in Los Amigos should be advised of this
liability to non -indigenous plants.
c. Establish strict and enforceable measures
to control the dangers to wildlife from
dogs. Dogs should not be allowed to roam
free and should be. under their owners'
control at all times when outside.
d. Discourage livestock (horses, cattle,
goats, domestic fowl). The vegetation
available to wildlife will diminish con-
siderably if livestock are allowed in
the development.
These points are addressed in the Declaration
of Protective Covenants.
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V. GRADING AND DRAINAGE PLAN (4.02.04)
The Grading and Drainage Plan which follows was pre-
pared by Schmueser and Associates.
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GRADING AND DRAINAGE REPORT
PRELIMINARY PLAN - SUBDIVISION 2 � M. G0R9
LOS AMIGOS RANCH
Prepared by: Dean W. GorP �.
SCHMUESER & AS OC,I,ATE
ON, a N
z� J F ��, yw
Date: February 10, 1982
The purpose of this report is to discuss the preliminary grading and
drainage concepts as shown on the drawings included with this application
and in compliance with Section 4.02.04 of the Garfield County Subdivision
Regulations.
GRADING AND DRAINAGE PLAN:
a.) There will be no overlot grading on any of the lots or open
space. The only grading that will occur will be as required
for road construction and will be contained wholly within the
road right-of-way. Road cuts and typical sections are shown
on the road plan and profile sheets.
b.) With the large lots and rural nature of the entire Subdivision,
all lots have been able to be designed with at least a portion
of their boundary that abuts the roadway with cuts or fills of
less than three feet. That is, the vertical alignment of the
road has been kept very close to the original ground contours.
There are basically no lots that will require large cuts or
fills at driveway access points or drawings with excessive
grades.
c.) All street profiles are shown on the road plan and profile
drawings.
d.) The pertinent information relating to drainage is presented
in tabular form on the Drainage Plan. Runoff from precipita-
tion is to be conveyed by road ditches and natural drainage
channels. All major drainage channels will remain in their
natural states except for roadway crossings. All culverts
are sized to pass the 10 -year storm event.
The 10 -year and 100 -year peak discharge were calculated at
each roadway crossing using the Soil Conservation Service
Manual "Peak Flows in Colorado", which includes Technical
Release No. 55, "Urban Hydrology for Small Watersheds",
dated March, 1980. Peak flows of the developed property
will remain nearly identical to the undeveloped condition
SCHMUESER & ASSOCIATES
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because of the low density of development, large amount of
undisturbed open space and the use of natural drainage
channels.
e.) Consistant with the P.U.D. approval, improvements to County
Road 114 or a contribution of $32,700 in lieu of those im-
provements is to be made during construction of Filing 3,
Subdivision 2. Those improvements are subject to approval
of the Road Supervisor and will be designed and deliniated
prior to the actual construction of improvements.
SA
SCHMUESER & ASSOCIATES
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VI. UTILITY PLAN (4.02.06)
The Utility Plan and report which follows was prepared
by Schmueser and Associates.
UTILITY REPORT
PRELIMINARY PLAN - SUBDIVISION 2
LOS AMIGOS RANCH
Prepared by: Dean W. Gordon, P.
SCHMUESER & ASSOCIAIV
Date: February 10, 1982
•• N-q3ti,/� �� tN.
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The purpose of this report is to discuss the preliminary utility system
concepts as depicited on the utility drawings included with this appli-
cation and in compliance with Section 4.02.06 of the Garfield County
Subdivision Regulations.
A. Water Supply
The water system will be a phased extension of the existing system
which serves the apartment units. The system consists of the
following:
- Well No. 5 and Well No. 6, both drilled deep wells.
- Treatment building consisting of chlorination equipment,
pressure tanks, and electrical controls.
- Distribution system as shown on the plans.
The system will be expanded in phases to serve the three filings
of Subdivision 2 as follows:
- Filing 1: The existing system is designed to serve 96
apartment units. Only 48 units are now built leaving an
available system capacity equivalent to the 48 unbuilt
units. Essentially the water system will be expanded by
extension of the distribution network to serve Lots 1-10,
Filing 1. The 10 lots are equal to about 20 apartment
units, hence the system will have sufficient capacity to
serve these lots.
- Filing 2: The high pressure zone will be created as a
result of this filing. To expand the system, in addition
to the water network being extended, the water storage tank
and two (2) pressure regulating stations must be constructed,
modifications to the treatment facility will be required
(removal of the pressure tanks and changing of the electrical
controls) and Well No. 5 will be abandoned. These changes
will put the entire system on a gravity pressure system
with two pressure zones.
st
SCHMUESER & ASSOCIATES
20
- Filing 3: The distribution system will be extended to
serve Lots 1-10 and Lots 11-18. In addition, a cistern will
be installed to provide a source of water for fire protection
for Lots 14-18.
The design parameters for the water system at the various phases
are as follows:
Average day Peak day Peak hour
Demand Demand Demand
Storage
Existing 36,330 gpd 76 gpm 150 gpm N/A
Filing 1 26,560 gpd 55 gpm 110 qpm N/A
Filing 2 55,000 gpd 115 gpm N/A 235,000 gal.
Filing 3 80,000 gpd 166 gpm N/A 260,000 gal.
The above table is based on a domestic demand of 100 gpc/d and an
irrigation demand of 2.5 Af/A over 160 days.
Because of the close proximity of Lots 17-20, Filing 2 to the water
storage tank, the water pressure will not be adequate. These units
will require an in-house booster pump to provide additional pressure.
The pressure at the fire hydrants serving these lots will be less
than 20 psi residual. The usual requirement for 20 psi residual at
a hydrant has a two -fold basis, first to prevent negative pressures
in the system during pumping and second, to provide adequate water
supply to the hydrant during pumping. Both of these requirements
will be met in this case because the hydrant is located very near
the tank on the 10" main. For fire flows up to 750 gpm, there will
be positive pressure in the system and adequate delivery of water
to the fire pumping equipment.
All of the lots, from Lots 13-18, Filing 3, to the west, will be on
a rural water distribution system. The 3" line will be adequate
for domestic and lawn irrigation use. Cisterns will be provided at
strategic locations and connected to the system to provide a source
of water for fire protection. These cisterns will be 10,000 gallons
in size and will be installed in such a way so as to be filled
automatically.
1.) Source
a., b., and c.) Water rights ownership is addressed in a
letter dated February 2, 1982, from Nelson, Hoskin, Groves &
Prinster, attorneys for the applicant. The letter and the
attachments indicate that there are sufficient legal, decreed
water rights available for this development.
SCHMUESER & ASSOCIATES
21
d.) Well No. 6 has been test pumped in excess of 300 gpm and
Well No. 5 has been test pumped in excess of 100 gpm and
provide adequate yield for all filings of Subdivision 2.
The water source will be constructed by the developer. The
physical operation of the system is described above.
e.) The water sources have been in use for three (3) years,
servicing the existing apartment units. The water has met
all testing requirements of the State Health Department
for both chemical and bacteriological parameters.
2.) Ownership
The water system will be owned and operated by the developer.
The developer will construct and finance all capital improve-
ments.
3.) The existing system is described above.
4.) No -individual water systems are planned; all units will be
connected to the central water system.
5.) The water supply has been decreed by the Water Court, evidence
of which is contained in the before mentioned legal opinion.
B. Sanitatary Sewage Disposal
1.) Central Sanitary Sewage Facilities. Those lots which will
be serviced by the Spring Valley Sanitation District are
as follows:
Filing 1: Lots 1-5
Filing 2: Lots 1-25
Filing 3: None
The collection system is shown on the utility drawings. The
entire system will be gravity with the exception of the service
to Lots 2 and 3, Filing 2. Portions of the possible building
sites on these lots are located some 15' below road surface.
Because of the rock conditions on deep cuts, it will be nec-
essary for these units to have small lift pumps in the dwelling
units to lift wastewater into the gravity system.
The design criteria for single family units, as per the Spring
Valley Sanitation District Service Plan, is 350 gpd/unit. Total
design flow is therefore 10,500 gpd. Those lots which are to
SCHMUESER & ASSOCIATES
22
be served by the District are within the boundaries of the
Sanitation District.
a.) Treatment will be provided by the Spring Valley Sanita-
tion District. Adequate capacity exists at the existing
facilities. A letter from the Sanitation District is attached.
b.) Upon completion, the wastewater collection system will
be deeded to the Spring Valley Sanitation District. The
developer will be responsible for the cost of the design and
construction of all utilities.
c.) The collection system to serve Subdivision 2 will be
an extension of the existing collection system of the Spring
Valley Sanitation District. All lines in the system are 8"
diameter and have been sized to accomodate the built out
density proposed for the District, including this submittal.
2.) Industrial Sewage Disposal System. Those lots which will be
served by individual sewage disposal systems are as follows:
Filing 1: Lots 6-10
Filing 2: None
Filing 3: Lots 1-18
The investigative reports done by Lincoln Devore indicate
that while the lots in this subdivision most likely have favor-
able conditions for standard septic tank/ieachfield systems,
logicalized geologic conditions may require engineered systems.
At the time a specific building site and disposal area can
be located on the ground, percolation and site condition infor-
mation will be gathered in accordance with State and Garfield
County code requirements, and the final design of the individual
systems will be made.
C. Underground Utilities. Utilities will consist of telephone
and electric service and possibly gas service. Standard front,
side and rear lot easements are to be reserved for utility
placement. It is anticipated that the utilities would be placed
in the road right-of-way adjacent to the lots and the utility
companies will confirm this through review agency comments.
Underground utilities have not been shown on the drawings.
The°developer will make a decision at the start of construction
of each Filing as to the economic viability of qas service.
As such, no decision on qas service to specific areas of the
development has been made at this time.
SA
SCHMUESER & ASSOCIATES
23
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February 9, 1982
1:
It
it
Mr. Malcolm Wall
Los Amigos Ranch Partnership
P.O. Box 1506
Glenwood Springs, CO 81602
RE: Subdivision 2
Los Amigos Ranch
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1!
SCHMUESER & ASSOCIATES
201 CENTENNIAL STREET
SUITE 306
GLENWOOD SPRINGS, CO 81601
(303) 945-5468
Dear Malcolm:
The Spring Valley Sanitation District presently has sufficient capacity
at the existing aerated lagoon treatment facilities to service the 30
single family lots in Subdivision 2. This is based on the present
hydraulic loading on the facility and the District's prior commitment
to service the existing CMC physical plant.
Sincerely,
SCHMUESER & ASSOCIATES, INC.
ZR`
Dean . Gordon,
Distri t Engineer
Spring Valley Sanitation District
DWG/1n
Project # B1559A
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