HomeMy WebLinkAbout2.0 PC Staff Report 04.14.1993PC 4-14-93
PROJECT INFORMATION AND STAFF COMMENTS
REQUEST: Sketch Plan and PUD Amendment -
Westbank Ranch PUD Filing #4
APPLICANT: Westbank Ranch #1 LTD
PLANNERS: Jerome Gamba & Associates
ENGINEERS: Jerome Gamba & Associates
LOCATION: A parcel of land located in portions of
Sections 35 T6S, R89W, Section 1 and 2,
T7S, R89W of the 6th P.M.; more
practically described as a parcel of land
located south of Westbank Ranch PUD
Filing #1, #2 and #3, south of County
Road 109, approximately 3.5 miles
southeast of Glenwood Springs.
SITE DATA:
A 285.08 acre parcel to be split into tracts
of land that would allow a maximum of 98
single-family dwelling units.
WATER: Wells - Community System
SEWER: ISDS
ACCESS: County Road 109
EXISTING ZONING: PUD
I. RELATIONSHIP TO THE COMPREHENSIVE PLAN
The proposed PUD is located District 1C -Central Water and Sewer, Severe
Environmental Constraints as indicated on the Comprehensive Plan Management
Districts Map.
II. DESCRIPTION OF THE PROPOSAL
A. Site Description: The proposed PUD is located on a bench overlooking the
Roaring Fork river valley floor, directly above the existing Westbank
development. Topography on the site consists of three distinct geologic
configurations: a moderately sloping lowland fully vegetated with native
grasses, a steeply sloped zone sparsely vegetated with evergreen species,
sagebrush, and native grasses, and an upland benched area well vegetated with
significant sagebrush, rabbitbrush, and isolated stands of pinion and juniper.
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B.
•
Several intermittent drainages are visible in the steeper portions of the property
and extend into the upland bench. Elevations on the property range from 5,950
at the northern edge, to almost 6,880 feet at the southern reaches of the property.
A vicinity map is attached on page
Background: Westbank Filing #4 was approved and platted in September of
1982. At that time, Filing #4 included the following uses; 40 single-family
dwellings, 20 duplex units, and 40 fourplex units for a total of 100 dwelling units
on 60 lots on the 285 acre parcel. The original proposal included a central
sewage treatment facility, which was included in the SIA. Table 1 summarizes
the primary differences between the approved project and the modified proposal.
A site plan will be presented at the public meeting.
Since that time, the Subdivision Improvements Agreement (SIA) has been
amended in respect to two dates: the deadline for improvements has been
changed from November 1, 1984 to November 1, 1994; and the deadline for
security for the improvements described in the SIA has been extended from July
1, 1983 to July 1, 1993. These amendments were made in response to a public
meeting to consider the revocation of the approval of Filing #4 in March of
1992, due to the failure to complete any of the required improvements on the
site.
C. Development Proposal: The plan has been modified in several respects from the
previously approved project. The current proposal contains 98 single-family lots
for a total of 98 dwelling units. The modified plan contains lots ranging from
1.0 to 15.0 acres in size, with the majority of lots in the 1.0 to 2.0 acre range. The
approved project contained lots ranging from 0.44 to 1.94 acres, with 36 of the
58 dwelling units being less than one acre. The modified plan calls for 91
dwelling units on the upper bench and 7 on the lower bench. The approved
project calls for 81 dwelling units on the upper bench and 17 on the lower bench.
The road alignment has also changed to reflect the modified lot configuration.
The previous plan anticipated an expansion of the existing water system which
currently serves Westbank Filings 1, 2 and 3. The modified plan includes a
system separate system, with water to be provided from new well(s) to be
augmented with Ruedi Reservoir water. A total of 64 feet of water is to be
purchased from Ruedi for the needs of the development. Fire protection will be
provided via hydrants and a storage system.
Table 1 summarizes the primary differences between the previously approved
project and the current proposal.
III. REVIEW AGENCY/PLS BLIC COMMENTS
A. Colorado Geological Survey: No comments have been received from the
Geologic Survey. Staff does not typically refer projects of this type to the
Geologic Survey until the Preliminary Plan Phase.
B. Colorado Department of Health: Staff has had several conversations with
Dwayne Watson concerning this project. Mr. Watson has serious concerns with
the proposed ISDS systems, including slope and soil constraints. Furthermore,
Mr. Watson questions if the slope constraints on the site physically prohibit
ISDS on some lots within the PUD.
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TABLE 1
COMPARISION BETWEEN APPROVED AND PROPOSED PROJECT
DESIGN
COMPONENT
APPROVED PROJECT
PROPOSED PROJECT
Dwelling Type and
Number
10 four-plex lots, 10 duplex
lots and 38 single-family
lots (98 Total DUs)
98 single-family dwelling
units
Lot Size
0.44 acres to 1.94 acres (36
of 58 less than 1 acre)
1.0 to 15.0 acres (0.344
DUs/acre)
Site Plan
81 DUs on upper bench
and 17 on lower bench
91 DUs on upper bench
and 7 on lower bench
Water Supply
Expansion of existing
system serving Westbank
Filings I through III
Separate sytem augmented
with Ruedi water
Sewage Disposal
Central System
ISDS
Zone Districts
Residential/Single Family,
Residential/Cluster
Housing, Residential/Multi
Family, Open Space
Residential/Single Family
C. Colorado State Forest Service: The Colorado State Forest Service reviewed the
project, and conducted fieldwork on April 1, 1993. The proposed subdivision
is in an area that has been mapped as medium to high hazard for wildfire. The
Forest Service was particularly concerned with areas in the subdivision that
where grades exceed 30 percent and the densely vegetated drainages.
In addition, Forest Service standards require dual ingress/egress points, which
are not included in the proposal. Furthermore, the cul-de-sacs exceed the 750
foot maximum length as recommended by their standards. Turnouts are
recommended at 750 intervals to provide adequate emergency vehicle access. A
copy of Kelly Roger's April 7, 1993 letter is attached on page. ?
D. U.S. Bureau of Lend Management: The BLM had the following comments on
the proposal:
1. The BLM recommended fence standards that allow for easy passage by
big game;
2. The parcel immediately adjacent to the site has been identified as a
disposal parcel, and is not expected to remain in public ownership;
3. The density proposed by the applicant will render the critical mule deer
habitat un suitable for deer habitat, and will increase deer impacts on
adjacent property, particularly during the winter months;
4. The soils on the site are poorly suited for housing development due to
shallow depth to bedrock, steep slopes, and very high hazard of water
erosion.
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A copy of Michael Mottice's April 2, 1993 letter is attached on page VI
E. Public Service Company: No response has been received from Public Service.
F. Colorado Division of Wildlife. The Division has noted that the area is
considered to be elk winter range and critical deer habitat, meaning that the loss
of critical winter habitat would adversely affect deer in the area. DOW further
states that big game populations in the area will be threatened by domestic dogs,
loss of native vegetation, increased erosion, increased vehicular traffic, increased
human/wildlife interaction, and migration obstacles. The DOW suggests the
following mitigation:
1. Reduce the density by cluster development;
2. Require underground utilities to protect raptors;
3. Require fencing restrictions;
4. Restrict or prohibit domestic dogs and horses within the subdivision;
5. Restrict building envelopes to preserve native vegetation.
In addition, the DOW suggests that all homeowners are aware of the critical
habitat designation, and realize that deer and elk will die on the property, and
are responsible for disposing of carcasses.
A copy of Larry Green's April 2, 1993 letter is attached on page /0 //
G. Roaring Fork School District RE -1: No Response.
H. Office of the State Engineer Division of Water Resources: No response.
J. Public Service Company: No response.
K. Holy Cross Electric Association: No Response.
L. U.S. West Communications: No Response.
M. Rocky Mountain Natural Gas: No Response.
IV. STAFF COMMENTS
This application is addressing two separate processes: A PUD zone amendment
addressing the changes in the zone districts on the site; and the sketch plan for the
revised subdivision design. These two processes require compliance with different
standards, and each is addressed below separately.
1. PUD REZONING REQUEST: Westbank Filing #4 was processed as a PUD,
with the existing portions of the project processed as a subdivision request. The
standards for the current proposal (Zone District Amendment) are addressed in
Section 4.0 of the Zoning Resolution.
PUD Objectives: A PUD may be approved by the County Commissioners for
the following purposes and to achieve the following objectives:
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1. To provide necessary commercial, recreational, and educational facilities
conveniently located to housing;
2. To provide well -located, clean, safe and pleasant industrial sites involving
a minimum of strain on transportation facilities (NOT APPLICABLE);
3. To insure that the provisions of zoning laws which direct the uniform
treatment of dwelling type, bulk, density, and open space within each
zoning district will not be applied to the improvement of land by other
than lot -by -lot development in a manner which would distort the
objectives of the zoning laws;
4. To encourage innovations in residential, commercial and industrial
development and renewal so that the growing demands of the population
may be met by greater variety in type, design, and layout of buildings and
by the conservation and more efficient use of open space ancillary to said
buildings;
5. To encourage a more efficient use of land and of public services, or
private services in lieu thereof, and to reflect changes in technology of
land development so that resulting economies may inure to the benefit of
those needing homes;
6. To lessen the burden of traffic on streets and highways;
7. To conserve the value of land;
8. To provide a procedure which can relate the type, design, and layout of
residential, commercial, and industrial development to the particular site,
thereby encouraging preservation of the site's natural characteristics; or
9. To encourage integrated planning in order to achieve the above purposes
and objectives of development.'
In the application, the applicant states that "The modifications are being
proposed because it is felt that the multiple family concept is no longer in
keeping with the development that has occurred in the general area".2
Staff contends that this assertion is not consistent with Objective #4 (above) for
the following reasons:
• The purpose of innovation, by both definition and the spirit and intent
of the PUD objectives, is not to perpetuate adjacent development;
• The growing demands of the population in the upper -valley region are
more consistent with the cluster -multi -family concept previously
approved, as opposed to the current proposal. Empirical evidence is
available to support this contention, including the lack of affordable
'Section 4.02 Purposes and Objectives of Development, Garfield County Zoning
Resolution, 1984 as amended.
2Westbank Ranch Planned Unit Development Modification and Westbank Ranch
Filing #4 Subdivision, page 1.
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housing in the upper -valley region, and the subsequent shift ofemployees
to the down -valley communities were affordable is still available. The
increased commuting pressure to up -valley employment sites is evidence
of this shift.
The applicant also states that "..the difficulty in permitting and constructing
sewage treatment facilities which would discharge to the Roaring Fork River has
caused the construction of a central sewage collection system to be
impractical".3 Impractical can take several meanings, however the regional
system proposed at Aspen Glen appears to address the traditional use of the
term, and is certainly a superior, although costly alternative to the current
proposal for individual ISDS systems. Staff recognizes that the Aspen Glen site,
due to the distance and topography from Westbank #4, may prove to unfeasible,
but the applicant has failed to address the issue.
Consistency with the General Plan: Section 4.04 requires that "No PUD shall
be approved unless it is found by the County Commissioners to be in general
conformity with the County's General Plan. The following analysis attempts to
identify potential conflicts consistent with the section of the PUD requirements.
Mousing: The overall goal of the housing section of the Comprehensive Plan
is as follows:
Provide for affordable and diverse housing types capable ofaccommodating
needs of County residents, in all income ranges, without putting a financial
burden on existing public services 4
Objective #3 calls for the promotion of a variety of housing types and mix
through the use of a flexible development review process. Policy #3 states that
the PUD process is encouraged, so that the development community has greater
flexibility in project design.'
In staff's opinion, the cluster concept proposed in the original application is
more in line with the housing goals described earlier than the current
application.
Recreation and Open Space: Policy 5 requires that areas such as floodplains and
geological unstable soils which are restricted for the building of habitable
structures will be used as common open space accessible to the public in new
developments.
No additional geologic data has been provided by the applicant because the
engineering geology report prepared by Lincoln-Devore Laboratories in 1982
was incorporated by reference in this application. The geologic report and
mapping provided with the original approval identifies a historic gravel pit near
the center of the site. Considerable has been removed and relocated in this area,
and is mapped as man-made fill (Qf1). This fill material is considered
3lbid, page 1.
4Garfield County Comprehensive Plan, page 2.
5Garfield County Comprehensive Plan, page 2.
6Garfield County Comprehensive Plan, page 7.
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"unacceptable for foundations or other structures" without being removed and
recompacted".'
This area is currently proposed for platted lots, with no explanation regarding
mitigation. This appears to be inconsistent with the Comprehensive Plan
policies cited earlier.
A small landslide is located along the southern portion of the site, were a slump
has occurred in the Eagle Valley Evaporite and colluvial material overlying it.
The engineering report suggests that these areas be avoided, or proceed only
with detailed studies. This area is also indicated for residential development.'
Transportation: Policy 5B requires that excessive road cuts that will create
negative visual impacts will be discouraged. The proposed road alignment
crosses numerous drainages, and no cut/fill estimates or visual analysis
information has been submitted. Therefore, it is not possible for staff to
determine compliance with this policy.
Water and Sewer Services: Objective 3 encourages developers to carefully
analyze the site's capability to accommodate individual sewage disposal when
it is being considered as a part of a development proposal. Policy 3A states that
the County will require developers proposing ISDS to provide information that
demonstrates to the County that the land involved can physically accommodate
the individual systems.1D
The original proposal, and the Geologic Report prepared in 1976, did not
address the feasibility of ISDS on the site due the proposed central sewage
system. Therefore, no perc tests have been done on any of the proposed lots.
The only source of data available to staff regarding the suitability of ISDS on
each lot are from the Soil Conservation Service. Table 2 summarizes each soil
type present on the lots and the suitability of each soil type for housing
development and ISDS systems.
Staff recognizes that SCS maps are for general planning purposes and that these
constraints may be able to be addressed through engineering means. However,
no information has been submitted by the applicant at this time addressing these
constraints.
'Lincoln-Devore Laboratories, General Soils and Engineering Report, July 18, 1976,
page 10.
8lbid., page 7.
9Garfield County Comprehensive Plan, page 8.
'°Garfield County Comprehensive Plan, page 10.
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TABLE 2
SOIL SUITABILITY
SOIL NAME
BUILDING
DEVELOPMENT
SUITABILITY (1)
ISDS SYSTEM
SUITABILITY (2)
Gypsum Land -
Gypsiorthids
Slight
Moderate (Slow
percolation)
Dahlquist - Soutbace
Complex
Severe (Slope and large
stones)
Severe (Poor filter,
large stones)
Earsman - Rock
Outcrop Complex
Severe (Slope and
depth to bedrock)
Severe (Depth to
rock, slope)
Empedrado Loam
Moderate (Slope)
Moderate (Slope)
Gypsum Land -
Gypsiorthids Complex
Severe (Slope)
Severe (depth to rock
and slope)
Soutbace Cobbly Sandy
Loam
Severe (Slope)
Severe (Slope)
Uracca, Moist - Merge]
Complex
Severe (Slope and large
stones)
Severe (Slope and
large stones)
1) Assumes a single-family dwelling unit with no basements
(2) Assumes a typical septic tank absorption Geld
Source: Soil Survey of Aspen -Gypsum Area, Colorado, U.S. Department
of Agriculture, Soil Conservation Service, May, 1992. Table 10 -
Building Site Development (pages 191 - 200), and Table 11 -
Sanitary Facilities (pages 201 - 210).
Environment: Objective 1 discourages the development of land in areas of
identified severe environmental constraints. Policy 1, designed to implement this
objective, requires that the County shall discourage and reserve the right to
disapprove (sic) development in areas with identified severe environmental
constraints such as active landslides, debris slides, unstable slopes, bedrock
slides, major mudflow, radioactive tailings, slopes over 25 percent and 100
year floodplain. Objective 5 requires projects ensure that development on land
having moderate or minor environmental constraints consider the limitations of
the land." Objective 6 requires that development proposals consider soil
constraints as a part of the physical design, and policy 6 requires that the County
discourage development in areas with severe soil constraints. Objective 9
encourages development in areas with the least environmental constraints prior
to land with the greatest physical limitations.12
Garfield County has traditionally used the Lincoln-Devore Laboratories
Natural Hazard Maps produced for the County in 1976 to determine areas of
severe environmental constraints. These maps served as the basis for the
"severe" classifications that appear on the Comprehensive Plan Management
Districts Map, which identified the area including this project within the "severe"
"Garfield County Comprehensive Plan, page 12.
12Garfield County Comprehensive Plan, page 13.
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designation. Staff referenced the original working maps used for the
management district maps, and these maps included the following findings:
• The proposed subdivision is located in areas of Minor, Moderate and
Major slope hazards, including areas platted as single-family dwelling
units;
• The proposed subdivision is located in areas of Moderate and Major soil
hazards, including areas platted as single-family dwelling units;
• The proposed subdivision is located in areas defined as Severe for septic
systems.
A graphic portrayal of the project's relationship to the hazard areas identified
by Lincoln-Devore is shown on page taft.
Staff is not suggesting that these constraints cannot be addressed from an
engineering perspective, however no evidence of mitigation has been submitted
by the applicant. Furthermore, staff questions if these constraints were
considered in the subdivision design that is now proposed for this phase of the
development.
Objective 4 requires that the developer ensure that natural drainages are
protected from soil erosion that would result from alteration. In the application,
the project engineer points out that "..the road system serving the development
will cross a number of major drainages. Drainage structures for these crossings
will be designed on the basis of computer analysis of the drainage basins which
they serve and on a 25 year frequency storm event.""
No evidence has been submitted regarding possible alternatives to the geometry
of the proposed roadway system, or evidence suggesting that the proposed
alignment was designed to limit these impacts.
Performance Standards: The Comprehensive Plan includes a series of
perfornlance standards addressing specific environmental constraints, including
areas having slopes greater than 25 percent. The Plan states that slopes
exceeding 25 percent may be:
1. Maintained as open space;
2. Platted as a portion of an approved building envelope, with an open
space easement;
3. Platted as a portion of a building lot which as adequate usable building
space available other than steep slopes;
4. Platted as a portion of a subdivision and dedicated as permanent open
space;
5. Developed with special design considerations and engineering.i4
The applicant has failed to provide staff with a slope analysis to assess
compliance with these requirements.
13Application, page 5.
t4Garfield County Comprehensive Plan, page 27.
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Performance standards also address the impact of development on the natural
terrain. Specifically, the Plan requires that the proposed development should be
designed in a manner which demonstrates a "fit" with the existing topography
of the land.15
Staff has no evidence of cut/fill estimates to assess compliance with this
requirement, although the current road alignment appears to have significant
topographical constraints due to the crossing of several major drainages on the
site.
Sewage Disposal facilities are also addressed by performance standards.
Specifically, the Plan requires that central sewage disposal systems be included
in proposals that have severe or moderate septic limitations. The State
Department of Health and hazard maps reviewed by Staff indicate that the site
poses significant constraints to traditional ISDS systems. Rather than proposing
a system in compliance with the standard, the applicant has removed the central
sewer from the proposal, and appears to violate this standard. Of particular
note is the failure of the applicant to provide data that supports the suitability
of the site for ISDS.
Zoning Requirement$: Section 4.08 addresses the PUD processing requirements,
and the following discussion addresses specific requirements that do not appear
to have been met by the application:16
1. Under provisions of Section 4.08.05(2)(h), the applicant is required to
identify sites suitable for construction, as well as sites suitable for sewage
disposal based upon the severe limitations described in the soils report.
As described earlier, this area has significant slope and soil constraints.
These issues have not been addressed by the applicant, and staff
questions if the physical design of the PUD considered these limitations;
2. Under provisions of Section 4.08.05(7)(E)(i), the applicant is required to
identify the proposed water source adequate to serve the PUD. The
proposed water source is a well augmented by Round II sales from Ruedi
Reservoir. It is not clear that such water contracts are currently
available, or whether the amount identified by the applicant is adequate
to support a well servicing the PUD. Additionally, the calculations
contained in Exhibit B of the application are not signed, nor explained
in any manner;
3. Under provisions of Section 4.08.05(7)(E)(ii), the applicant must describe
the proposed method of sewage treatment. In regards to sewage
treatment, staff has previously noted the difficulties of the system
proposed in any area with soils that may not be appropriate for ISDS,
slopes that may not accept ISDS, and unknown percolation rates. This
provision of the Code inherently requires that the system proposed is
functional and responsive to unique conditions of the site. The evidence
in this regard is inconclusive;
15Garfield County Comprehensive Plan, page 28.
16Garfield County Zoning Resolution, 1984 as amended, pages 39-41.
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4. Under provisions of Section 4.08.05(7)(E)(iii), the applicant must
describe the general manner in which storm drainage will be handled.
There is little or no evidence as to the method in which storm drainage
for the PUD will be addressed;
5. Under provisions of Section 4.08. 05(7)(F)(iv), the applicant must address
legal access to the site. Garfield County Road Standards allow cul-de-
sacs that do not exceed six hundred feet (600') in length. The Board of
County Commissioners may approve longer cul-de-sacs for topographic
reasons and it can be proved that fire protection and emergency access
is provided." The longest cul-de-sac within the PUD extends from an
intersection with the northeast cul-de-sac to a point at the northwest
corner of the PUD. This cul-de-sac is approximately 4,486 feet in length,
with no alternative access. No topographic explanation is included in the
application. This is of particular concern to staff, particularly in regards
to the wildfire potential on the site.
6. Under provisions of Section 4.08.05(7)(G), the applicant must provide
evidence that the PUD has been designed with consideration of the
natural environment of the site and the surrounding area and does not
unreasonably destroy or displace wildlife, natural vegetation, or unique
natural or historic features. The current plan, based on documentation
from the Division of Wildlife cited earlier, will displace wildlife. There
does not appear to be a statement regarding the manner in which
consideration has been given to the affects this impact. Furthermore,
staff contends that the overall design of the road geometry and lot
configuration failed to consider the unique physical constraints on the
site.
V. STAFF RECOMMENDATION
Based on staff review of the application, and an assessment of the consistency with
Comprehensive Plan policies and the Zoning Resolution, staff recommends denial of
the application. A number of issues may be able to be addressed through extensive
conditions, although staff suggests that these conditions would require extensive
discussions with the applicant beyond a public meeting. If the Commission feels that
these issues can addressed at Preliminary Plan, the following conditions of approval are
offered as a starting point:
General
1. All representations, either within the application or at stated at the public
hearings before the Planning Commission and the Board of County
Commissioners shall be considered conditions of approval unless stated
otherwise by the Planning Commission and the Board of County
Commissioners. the public hearing, are considered conditions of
approval.
"Garfield County Subdivision Regulations, Section 9.33(A), page 9-2.
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Geology
2. The Preliminary Plan shall have a building envelope designated for every
lot within the PUD. All building envelopes will avoid active and older
landslides, manmade fill, and unsuitable slopes. Construction upon
debris fans and younger alluvial fans shall be avoided unless properly
mitigated. No lot will be created that does not contain an acceptable
building envelope. No lot shall be created that is smaller than the
minimum lot size allowed in that particular zone district.
3. At the time of Preliminary Plan submittal, the applicant shall submit a
detailed debris flow study for all lots on debris fans, with a proposed
mitigation plan designed by a geotechnical engineer.
4. Additional soils investigation of Moderate and High Hazard areas, as
defined by the Lincoln-Devore Hazards Maps and the previous geology
report submitted with the previous filings of the Westbank project. Proof
will be required at Preliminary Plan that the physical constraints on the
site have been addressed in the physical design of the PUD.
5. An engineered foundation shall be required for all structures within the
PUD and submitted with building permit applications. Furthermore, all
final plats shall have the following plat notes:
A. Prior the issuance of a building permit, the owner of each lot shall
prepare and submit a soils and foundation report, and ISDS
design, and a grading and drainage plan prepared and certified by
a professional engineer. All improvements shall be constructed in
accordance with such measures which shall be constructed in
accordance with such measures which shall be a condition of the
building permit.
6. At the time of Preliminary Plan submittal, the applicant will submit a
detailed Drainage Plan addressing the existing and historic drainage
basins on the site. Furthermore, proof will be required that the physical
design of the lot configuration and road alignments respect these natural
features, or can be mitigated if necessary.
7. Prior to Preliminary Plan submittal, the applicant will perform a slope
analysis to ensure that all areas with slopes greater than 40 percent are
not included in the minimum lot size determination. Following this
analysis, each lot submitted at Preliminary Plan will have be least one (1)
acre in size exclusive of areas in excess of 40 percent slope.
ISDS
8. At the time of Preliminary Plan submittal, the applicant shall submit an
ISDS feasibility study, prepared by a professional engineer, addressing
the feasibility of ISDS systems on each lot. Percolation test results will
be included in the study.
Water Supply
9. At the time of Preliminary Plan, the applicant shall demonstrate evidence
of adequate water quantity from the proposed well field for the project.
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Wildlife Impacts
10. The applicant shall consider incorporating the Division of Wildlife
comments within the Protective Covenants, including restrictions on dogs
within the PUD as well as the recommended fencing restrictions.
Road Alignment
11. At the time of Preliminary Plan, the applicant shall submit cut/fill
estimates for the proposed road alignment, including an assessment of
the relationship between the proposed road alignment and the visual
impacts of the resulting cut slopes. Furthermore, the Preliminary Plan
will include detailed design plans and the grade of each section of the
roads to determine compliance with Garfield County Road Standards.
12. At the time of Preliminary Plan, the applicant will submit documentation
that the lack of a secondary access is acceptable to the Carbondale/Rural
Fire Protection District.
SKETCH PLAN REQUEST: Section 3.23 of the Garfield County
Subdivision Regulations states that "the Planning Commission shall review the
application for consistency with the standards and policies set forth in the
following:
A. Garfield County Subdivision Regulations;
B. Garfield County Zoning Resolution;
C. Garfield County Comprehensive Plan;
D. Garfield County Road Standards and Policies;
E. Garfield County municipal comprehensive plans and municipal
regulations, as applicable; and
F. Other applicable local, state and federal regulations, resolutions, plans
and policies, as applicable."
The majority of these issues have been addressed in the previous discussion
regarding the PUD rezoning approval. All of these issues are appropriate for
discussion with the applicant.
The sketch plan process is purely informational. Completion of the Sketch Plan
process does not constitute approval of the proposed plan.
The Sketch Plan comments shall be valid for a period not to exceed one (1) year
from the date of the Planning Commission review. If a Preliminary Plan for the
proposed subdivision is not presented to the Garfield County Planning
Commission within this period, the applicant shall submit an updated Sketch
Plan application to the Planning Department for review and comparison with
the original application.
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MEMORANDUM
TO: PLANNING COMMISSION
FROM: MARK BEAN Q
91:4—
DATE: APRIL 9, 1993
RE: ADDITIONAL EASTSIDE COAL CONSIDERATIONS
Subsequent to the staff report being completed, some additional
concerns and issues were identified, that the Planning Commission
should consider:
-The Eastside coal discharge permit has limitations that are
imposed on the applicant in terms of water quality discharged.
The discharges will go into the Farmer's Irrigation Co. ditch.
There are no guarantees that should there be an unexpected
hydrologic event causing the settling ponds to overflow and
damage down ditch agricultural lands, the recourse is
litigation through the courts. It has been suggested that the
applicant be required to post security with the County, to
guarantee nondegradation due to hydrologic event not
considered in the design of the mine, allowing property owners
to have the Board make a determination without going to court.
-The application does not say where the coal is being hauled.
Will there be any other County roads impacted? Will trucks to
through any municipality?
PROJECT INFORMATION AND STAFF COMMENTS
REQUEST:
APPLICANT:
LOCATION:
SITE DATA:
WATER:
SEWER:
ACCESS:
EXISTING ZONING:
ADJACENT ZONING:
PC 4/14/93
Eastside Mine, Special Use Permit
for a mineral extraction operation
Eastside Coal Company, Inc.
A tract of land located in portions
of Sections 19, T5S, R91W and
Sections 23 and 24, T5S, R92W,
more practically described as a
parcel located approximately 3.5
miles north of Silt off of County
Road 237.
An 830 acre tract for a coal mine
and associated facilities.
Individual wells and spring
Individual sewage disposal system
Via County Road 237
A/R/RD
North:
South:
East:
West:
I. RELATIONSHIP TO THE COMPREHENSIVE PLAN
O/S
A/R/RD, O/S
A/R/RD, O/S
O/S
The parcel is located in Districts D, Rural Areas with Moderate Environmental
Constraints and District F, Rural Areas with Severe Environmental Constraints.
II. DESCRIPTION OF THE PROPOSAL
A.
Site Description: The site is in the Harvey Gap area of the Grand Hogback and
is a narrow valley floor with water running north to south, with the Grass Valley
Reservoir on the north end. The terrain is generally fairly steep, with
predominantly pinon-juniper trees with Indian rye-grass, cheatgrass, large
sagebrush and other similar types of vegetation indigenous to this type of area.
Mining activity has occurred in the area since 1913, with an existing mine on the
east side of the gap and remnants from previous mining activity on the west side.
1
There is an office, bathhouse, shop and generator shed on the site presently, that
are from previous mining activity approved in 1985.
B. Project Descri tp ion: The applicant is requesting a special use permit for a coal
mine and associated facilities. The request is for a maximum of 20,000 tons per
year for the life of the mine. The mine will employ eight (8) people during that
time. The disturbed area of the mine site will be a maximum of 13 acres, which
will include all buildings, storage and waste disposal areas. The mine portal area
is on the east side of the gap and will have the office, bathhouse, shop,
generators, powder magazine, water tank, processing plant, coal and rock
storage areas and equipment storage areas. The west side of the gap will have
the waste disposal area, which is included in the previously noted 13 areas of
disturbed area.
The mine's water needs will be for dust suppression in the mine, domestic water
for the bathhouse, office and sanitary facilities, and for cooling equipment and
exhaust scrubbers. The estimated 75,000 gallons per year of domestic water
would come from a spring, two wells and water pumped from the mine.
Domestic drinking water will be provided from bottled water from a local
purveyor. The water is stored in a 10,000 gallon storage tank. Sewage is dealt
with by an existing individual sewage disposal system.
Coal will be hauled off-site in end dump trailer trucks with a gross weight of
68,000 to 80,000 pounds. It is proposed that there will be an average of five
round trips a day, Monday through Friday. The trucks will haul 18 to 25 tons
of coal in each load, which will be covered. The trucks will use County roads
237 to 233 to 227, to access Highway 6 & 24 (See map page 3 ).
HISTORY
Up until 1985, coal mining activity on the subject lands has occurred since 1913,
with a maximum annual production of 5,970 tons. In 1985, Garfield County by
Resolution 85-42, approved a 200,000 ton/year maximum production. From
1985 to 1990, when the permit expired, the mine produced a maximum of 6,960
tons of coal. Since that time, Eastside Coal has continued to operate as a
nonconforming use, with a maximum production level of 857 tons per year.
III. MAJOR ISSUES AND CONCERNS
A.
Zoning: Mineral extraction, processing, storage and material handling are
special uses in the A/R/RD zone district. As a special use, certain requirements
must be met:
5.03
(1) Utilities adequate to provide water and sanitation service based on accepted
engineering standards and approved by the Environmental Health officer shall
either be in place or shall be constructed in conjunction with the proposed use;
(2) Street improvements adequate to accommodate traffic volume generated by the
proposed use and to provide safe, convenient access to the use shall either be in
place or shall be constructed in conjunction with the proposed use;
2
(3)
Design of the proposed use is organized to minimize impact on and from
adjacent uses of land through installation of screen fences or landscape materials
on the periphery of the lot and by location of intensively utilized areas, access
points, lighting and signs in such a manner as to protect established
neighborhood character.
5.03.07
(1) An impact statement demonstrating that the application shall be designed and
operated in compliance with the applicable laws and regulations of the County,
State and Federal governments, and will not have a significant adverse effect
upon:
(A) Existing lawful use of water through depletion or pollution of surface run-
off, stream flow or ground water;
(B) Use of adjacent land through generation of vapor, dust,smoke, noise, glare
or vibration, or other emanations;
(C) Wildlife and domestic animals through creation of hazardous attractions,
alteration or existing native vegetation, blockade of migration routes, use
patterns or other disruptions.
(2) Truck and automobile traffic to and from such uses shall not create hazards or
nuisances to areas elsewhere in the County;
(3) Sufficient distances shall separate such use from abutting property which might
otherwise be damaged by operations of the proposed uses;
(4) Permits shall be granted for those uses only with the provisions that a
satisfactory rehabilitation plan for the affected land be submitted prior to
commencement of such use.
5.03.08
Industrial Performance Standards: All industrial operations in the County shall comply
with applicable County, State and Federal regulations regulating water, air and noise
pollution and shall not be conducted in a manner constituting a public nuisance or
hazard. Operations shall be conducted in such a manner as to minimize heat, dust,
smoke, vibration, glare and odor and all other undesirable environmental effects beyond
the boundaries of the property in which such uses are located, in accord with the
following standards:
(1) Volume of the sound generated: every use shall be so operated that the
volume of sound inherently and recurrently generated does not exceed ninety
(90) decibels, with a maximum increase of five (5) decibels permitted for a
maximum of fifteen (15) minutes in any one (1) hour, at any point of any
boundary line of the property on which the use is located;
(2) Vibration generated: every use shall be so operated that the ground
vibration inherently and recurrently generated is not perceptible, without
instruments, at any point of any boundary line of the property on which the use
is located;
3
(3) Emissions of smoke and particulate matter: every use shall be operated so
as to comply with all Federal, State and County air quality laws, regulations and
standards;
(4) Emission of heat, glare, radiation and fumes: every use shall be so operated
that it does not emit heat, glare, radiation or fumes which substantially interfere
with the existing use of adjoining property or which constitutes a public nuisance
or hazard. Flaring of gases, aircraft warning signals, reflective painting of
storage tanks, or other such operations which may be required by law as safety
or air pollution control measures shall be exempted from this provision;
(5) Storage area, salvage yard, sanitary landfill and mineral waste disposal
areas:
(A) Storage of flammable or explosive solids or gases shall be in
accordance with accepted standards and laws and shall comply with the
National Fire Code;
(B) At the discretion of the County Commissioners, all outdoor storage
facilities for fuel, raw materials and products shall be enclosed by a fence
or wall adequate to conceal such facilities from adjacent property;
(C) No materials or wastes shall be deposited upon a property in such
form or manner that they may be transferred off the property by any
reasonably foreseeable natural causes or forces;
(D) All materials or wastes which might constitute a fire hazard or which
may be edible by or otherwise be attractive to rodents or insects shall be
stored outdoors in accordance with applicable State Board of Health
Regulations;
(6) Water pollution: in a case in which potential hazards exist, it shall be
necessary to install safeguards designed to comply with the Regulations of the
Environmental Protection Agency before operations of the facilities may begin.
All percolation tests or ground water resource tests as may be required
by local or State Health Officers must be met before operation of the
facilities may begin.
The following are the staff responses to the applicants proposal:
5.03
(1) The applicant has proposed to use water pumped from the mine, a spring and two
wells as the source of domestic water. A plan of augmentation has been submitted to
the water court, but there is no final ruling 011 the plan. Once the final decree is
approved, the applicant will have adequate water for domestic purposes.
Sewage is being treated by an existing individual sewage disposal system installed in the
1970's. There is no known capacity of the septic tank or leach field. Either the capacity
will have to be determined and found to be capable of handling the proposed needs or
a new approved system should be installed per a permit from Garfield County.
4
(2) The applicant has submitted an analysis of the road impacts, based on a road study
done for the County by Chen -Northern that concludes that the proposed coal haul
trucks will not cause any additional need for improvements to the impacted County
roads (See letter pages i %s ). The applicant's analysis uses a different method
of analyzing the data developed from the Chen -Northern study and comes to a
different, but similar conclusion. The Chen -Northern study used a Falling Weight
Deflectometer to test the various County roads strength to establish a level of
improvements necessary, to meet the projected traffic impacts for a five (5) year design
life. The applicant's analysis used the data from the Chen -Northern study to establish
R -values for the pavement and sub -base of the impacted roads. Using these values and
the projected traffic loading, the applicant established a one and one-half (1.5) year
design life. Both studies conclude that additional overlay depths are necessary to deal
with exist' g traffic, but they have different amounts of overlay needed (See rnaps pages
3 + ). A summary of the overlay depths recommended by each study is as
follows:
Road
Chen -Northern (5 yr.) SGM (1.5 yr)
CR 227 0.5" 3.5"
CR 233 0.7" 3.0"
CR 237 (South of Mine) 1.0" 3.5"
CR 237 (at Mine) 0.5" NONE
The applicant's (SGM) analysis states that the 1990 existing traffic load will require the
equivalent overlay, to the 1990 traffic plus the projected coal trucks. In other words,
the coal truck traffic will not increase the amount of overlay needed to meet existing
traffic loads.
The staff has difficulty reviewing the two analysis that utilize different techniques to
evaluate the road impacts. Each has a different design life, five (5) years versus one and
one-half (1.5) years. The applicant's position is that the trucks will not increase the
amount of overlay needed, therefore there is no need for the applicant to make any
improvements to the haul road. Section 5.03(2) states that there need to be "street
improvements adequate to accommodate traffic volume generated by the proposed use
and to provide, safe, convenient access to the use shall either be in place or shall be
constructed in conjunction with the proposed use". Both studies conclude that the
existing road is inadequate to deal with just existing traffic. The previously noted
section of the zoning requires "improvements adequate to accommodate traffic
generated", which the County does not have the capability of doing by itself. So, unless
the applicant is willing to make improvements to the road, a finding that there are street
improvements adequate to accommodate the traffic generated and provide safe,
convenient access cannot be made. The applicant does note that they have participated
in repair and maintenance activities previously, but there is not commitment to continue
at least that type of agreement.
(3) The applicant has reviewed the visual impacts of the mine and in summary noted
that the primary visual impacts will be fairly minimal when driving by the mine site and
from certain points on the Harvey Gap Reservoir dam embankment. Given the
proposed small scale of the mine and associated facilities, the impacts to adjacent
properties will be minimal in terms of visual impacts. Access points to the mine site and
waste disposal areas are located in reasonable locations. The only signs proposed are
those required by the State MLRB.
5
3.03.07
(1) (a) As noted previously, the applicant has filed a plan of augmentation for the
necessary water rights. Enclosed in the application is a copy of an approved
Colorado Wastewater Discharge Permit effective 7/1/92.
(b) Eastside Coal has an approved Colorado Department of Health, Air
Pollution Control Division, Emission Permits issued on 1/16/84 for coal
processing; primary and secondary crushing and screening; underground coal
mining operation; material handling, vehicle traffic emissions and other similar
air emission sources. Also included in the application is a noise impact study
done by Engineering Dynamics of Englewood that demonstrates that noise from
the mine site and truck traffic from the mine will comply with state noise level
limits. There are no identified sources of glare due to reflection from or lighting
on the site. None of the mining activities will result in vibration off of the
property.
(c) The Colorado Division of Wildlife has reviewed the application and based
on the proposal does not anticipate any additional impacts to wildlife in the
area.
(2) Truck traffic's physical impacts on County roads was reviewed previously. The
average of five (5) round trips per say, Monday through Friday, are to be
covered, minimizing the possibility of dust affecting properties along the haul
route. The County Road and Bridge department has expressed some concerns
about the traffic safety (See memo page 1, ). The Road and Bridge
department's concerns are related to the physical narrowness of the road in one
section and signage/stripping along the route. The traffic due to recreational use
poses a potential safety concern. Silt officials have expressed concern about
heavy truck traffic travelling through town, rather than going west on 6 & 24 to
access the Interstate system. As noted previously, the trucks will not exceed any
statutory noise limitations according to the applicant's consultant. The
applicant has received an approval of the coal haul schedule date of June, 1991.
Confirmation by the School District that this schedule is still valid, should be
obtained prior to issuance of any permits. In general, hauling will be between
7:00 A.M. and 7:00 P.M., Monday through Friday. Emergency hauling may
occur to three (3) times a quarter, with notification to the Planning Department
in advance. If this is approved, notice should be given to the Road and Bridge
department, not the Planning Department.
(3)
Automobile traffic due to employees and vendors, should not pose a problem,
based on the relatively small scale of the mine.
The mining operations nearest property line is 413 feet from the north property
line. This is the property line that is contiguous with the Harvey Gap State
Recreation area. The State Park Ranger has noted th t there will be visual
impacts and potential traffic impacts (See letter page' , ). These issues have
been addressed in previous comments.
(4) Eastside Coal has a reclamation plan approved by the State Mined Land
Reclamation Division, dated June 29, 1990, and with an expiration date of
6
January 13, 1995. This permit must remain valid for the life of any permit
approved by the County. Included in the approval of the reclamation plan is a
$49,000.00 bond for reclamation, that the State has determined is adequate.
5.03.08
(1) As noted previously, Engineering Dynamics of Englewood has concluded that
Eastside Coal will comply with all County and State noise limits;
(2) Eastside has indicated that there is no anticipated vibration that will be noticed
on adjacent properties, due to any of their operations;
(3)
Eastside has air emission permits in place for all operations on the site requiring
permits. No other operations are anticipated to cause smoke or particulate
matter emissions;
(4) No heat, glare, radiation or fumes are anticipated that will substantially interfere
with the existing use of adjoining properties;
(a) All explosives are stored in a concrete and steel storage' explosive magazine,
with the appropriate permits in place from the Colorado Division of Mines. All
other flammable liquids are stored in metal tanks;
(5)
(b) All outdoor storage oCfuel products is encircled by a concrete retaining wall
or earthen berm two feet high to minimize any spill or leak. Given that the
supply storage area is behind the bathhouse and office, there does not appear to
be any purpose in requiring additional screening of these facilities;
(c) Solid waste disposal from the mining operation will be disposed of in a waste
disposal area approved as a part of the MLRB permit. The disposal area is
located on the west side of the gap and will be visible for short periods of time
from CR 237. MLRB requires drainage and dust control measures;
(d) The coal storage area may constitute a fire hazard, but will be stored in
compliance with the COH Emission permit and should not constitute a fire
hazard;
(e) The mining operation is required to comply with parameters established in
the State Waste Water Discharge permit. There are monitoring requirements to
ensure that water quality is maintained. There are additional sampling and
monitoring requirements required by MLRB.
9.03.05
The application for the Special Use Permit is for the life of the mine and if deemed
necessary, periodic reviews of compliance or noncompliance. At the last major special
use permit for a coal mine (NCIG), the Board of County Commissioners imposed the
following language as a part of a condition of approval:
Once begun, any cessation of mining activity for a period of more than one (1)
year shall be considered an invalidation of all land use permits and any
resumption of mining activity shall require a new special use permit application.
7
For purposes of this Resolution, "mine activity" in terms of cessation of mine
activity, means the mining of coal in excess of 10,000 tons per calendar year.
"Mine activity" does not mean construction of surface facilities at the mine site
nor does it mean the construction of the mine including, but not limited to, the
completion of rock tunnels, the installation of mine ventilation equipment and
other such mine development activities.
It is suggested that a similar condition be imposed on any approval of this application.
IV. SUGGESTED FINDINGS
1. That the public, meeting before the Planning Commission was extensive and
complete, that all pertinent facts, matters and issues were submitted and that all
parties were heard at the meeting.
2. That proposed special use conforms to the application requirements of Section
5.03.07 and 5.03.08 of the Garfield County Zoning Resolution of 1978, as
amended.
3. That the proposed land use will be compatible with existing and permitted land
uses in all directions if appropriate conditions are attached to the permit.
4. That for the above stated and other reasons, the proposed special use is
consistent with the best interests of the health, safety, morals, convenience,
order, prosperity and welfare of the citizens of Garfield County.
V. RECOMMENDATION
Unless the applicant can propose some method of mitigating the road impacts, the
Planning Commission cannot make a determination that there are "street improvements
adequate to accommodate traffic volume generated by the proposed use", therefore, the
request should be denied.
If improvements to the County road can be made, the following conditions should be
included with an approval:
(1) That all road improvements and safety improvements necessary to improve
CR 227, CR 233, and CR 237 to provide a safe and convenient access to the
mine be completed prior to issuance of a Special Use permit;
(2) The applicant demonstrate that the existing individual sewage disposal
system is properly sized to meet the needs of the mine or construct an ISDS that
is approved by the County;
(3) Prior to issuance of a Special Use permit, the applicant submit a letter from
the RE -2 School District confirming the current school bus schedule;
(4) That all proposals of the applicant shall be considered conditions of
approval, unless specified otherwise by the Board of County Commissioners;
8
(5) Once begun, any cessation of mining activity for a period of more than one
(1) year shall be considered an invalidation of all land use permits and any
resumption of mining activity shall require a new special use permit application.
For purposes of this Resolution, "mine activity" in terms of cessation of mine
activity, means the mining of coal in excess of 10,000 tons per calendar year.
"Mine activity" does not mean construction of surface facilities at the mine site
nor does it mean the construction of the mine including, but not limited to, the
completion of rock tunnels, the installation of mine ventilation equipment and
other such mine development activities.
9
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I.
SKETCH PLAN
LARSII SUBDIVISION
43-
0
M1i
Si -ATE OF COLORADO
Roy Romer, Governor
DEPARTMENT OF NATURAL RESOURCES
DIVISION OF WILDLIFE
AN EQUAL OPPORTUNITY EMPLOYER
Perry D. Olson, Director
6060 Broadway
Denver, Colorado 80216
Telephone: (303) 297-1192
3-30-93
Garfield County Planning
109 8th St., Suite 303
Glenwood Springs, CO 81601
Dear Dave:
-5'71
HC �:
+f r,�,w` "'7„.„.i 1.
it
tNAR 3 f 1993
REFER TO
OF
For Wildlife -
For People
On 3-29-93 I inspected the Larsh Subdivision proposal. The
property does not lie within any winter range designations for deer
and elk but does lie adjacent to critical winter range and winter
range across Highway 82 to the northeast and across the Roaring
Fork River to the southwest. Wintering mule deer and elk will
occasionally utilize the property as is evidenced by their
droppings. The property contains valuable cottonwood riparian zone
along the Roaring Fork River and lies north of a bald eagle nest
site. These cottonwoods along the lower portion of the property
are valuable wildlife habitat to a variety of species but are also
very important as a screen between homesite development and the
eagle nest and adjacent feeding and roost sites. It is important
that this zone of cottonwoods be protected.
The following will help minimize impacts to wildlife. Most of
these recommendations emphasize measures which will minimize
impacts to the bald eagles.
1. Maintain and preserve the cottonwood riparian zone (i.e.-
no removal of cottonwoods, no livestock or horse grazing
within this zone)
2. Homesites be constructed on the upper 1/2 of the lots with
a 100 yard setback from the river bank and cottonwoods. This
would also keep homes away from what appears to be some active
sinkhole activity in the lower portions of the lot.
3. Limit dogs to 1 dog/home with dogs kenneled or chained.
Kennel be constructed before C.O. is issued.
4. No construction activity from Feb. 15 - May 1 if eagles
are present. This is less restrictive than Aspen/Glen due to
this subdivision's distance and elevation from the eagle nest.
5. No public or private fishing on the Roaring Fork River,
except float through traffic only, from Jan. 1 - May 15. Once
eagles abandon or leave the area for the year fishing may
continue.
DEPARTMENT OF NATURAL RESOURCES, Kenneth Salazar, Executive Director
WILDLIFE COMMISSION, William R. Hegberg, Member • Eldon W. Cooper, Member • Felix Chavez, Member • Rebecca L. Frank, Membf
Louis F. Swift, Secretary • George VanDenBerg, Chairman • Arnold Salazar, Member • Thomas M. Eve, Vice Chairman
In addition, if homeowners have livestock or horses, winter feeding
will attract deer and elk causing game damage problems. In
addition, it may also draw more animals across Highway 82 and
increase animal/car collisions. To minimize this we recommend that
homeowners be required to fence their stackyards with 8' game proof
fencing. We can provide fence specifications upon request.
Thank you for the opportunity to comment. If you have any
questions, please feel free to give me a call.
Kevin Wright
District Wile Manager
Carbondale
;j
1
1
0•
1
1
1
1
LOCATION MAP
WESTBANK RANCH `,P.U.D.-FILING #4 SUBDIVISION:;
SCALE: 1 inch = 2000 feel
i
JEROME GAMBA & ASSOCIATES, INC,`
CONSULTING ENGINEERS & LAND SURVEYORS
rTIPL.:1) .1.Nr-71
rAPh 0 8 1993
GARFIELD L OUN Y
April 7, 1993
Dave Michaelson
Garfield County Planning Dept.
109 8th Street, Suite 303
Glenwood Springs, Colorado
81601
Re: Westbank Ranch Wildfire Hazard Review
FOREST
SERVICE
State Services Building
222 S. 6th Street, Room 416
Grand Junction, Colorado 81501
Telephone (303) 248-7325
Dear Mr. Michaelson,
I have reviewed the Sketch Plan Report for the Westbank Ranch
Filing IV Resubdivision, submitted by Jerome Gamba and Assoc.,
and visited the site on April 1st. When evaluating a site for
wildfire hazard, I concentrate on vegetation, topography, water
supply, and access. These points are addressed in the following
comments.
Vegetation in the proposed subdivision is primarily sagebrush and
pinyon -juniper woodlands. The pinyon -juniper is generally located
in and around drainages, with sage occurring in between.
Topography consists of a series of gently sloping benches
separated by steep hillsides; the area is cut by a series of
drainages that create steep gullies flowing generally north.
Slopes range from nearly level to 40%.
The proposed subdivision is in an area that has been mapped as
medium to high hazard for wildfire. The high rating is limited to
the steeper ground of this parcel. Although fires in the pinyon -
juniper type are common, they are usually confined to single
trees or small groups of trees, and are generally easy to
control. In sagebrush, fires are usually of low to moderate
intensity and are likewise fairly easily controlled. Of primary
concern in this proposed subdivision are the areas over 30% slope
and the densely vegetated drainages. Under favorable burning
conditions, a fire occurring in one of the steep gullies would
intensify due to the "chimney" effect of the topography and
slope. Structures located in or at the head of such drainages
would be especially vulnerable to damage from wildfire.
The applicant has stated that water supply for firefighting will
be incorporated in the domestic water system. The CSFS standards
for water supply recommend either hydrants every 1000 feet along
roadways or cisterns with a 1000 gallon capacity for each
dwelling unit.
In regard to access, CSFS standards are for subdivisions to have
dual ingress/egress points, which is not provided for in this
proposal. Dual ingress/egress can be an important factor in
providing safe evacuation in case of wildfire. In addition, it
was noted that cul-de-sacs exceed the maximum 750 foot length as
recommended in CSFS standards. Turnouts should be located every;'
750 feet along these cul-de-sacs to provide adequate emergency
vehicle access.
My specific recommendations to further mitigate wildfire hazard;
for this proposed subdivision are:
- Structures should not be located
drainages.
in or at the head of
-Remove all vegetation within ten feet of all structures.
This area should be maintained in the future as low
groundcover such as mowed grass.
- Brush or trees within 30 feet of homes should be thinned,'
if necessary, so that remaining clumps are no more than 10
feet wide. This may be necessary on some lots, depending on
exact locations of building envelopes.
-Roof coverings should be of non-combustible materials.
Shake -shingle roofs are a documented source of ignition in a
wildland fire situation, and should be avoided.
The above recommendations are covered in more detail in the CSFS
publication "Wildfire Protection in the Wildland Urban Interface"
which I have sent to Mr. Gamba with a copy of this letter.
Thanks for the opportunity to review this proposal. Should you
have any questions regarding the above comments, please call me
at 248-7325.
Sincerely,
Kelly Rogers
Asst. District Forester
cc: Glenwood Springs FPD
Jerome Gamba