HomeMy Public PortalAbout2_ReportSummary.pdf2 REPORT SUMMARY
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This summary presents an overview of the proposed project and conclusions
of the analysis contained in Chapter 4, Environmental Evaluation. This
chapter also summarizes areas of controversy and alternatives to the project.
For a complete description of the project, please consult Chapter 3, Project
Description. For more information about project alternatives, please consult
Chapter 5, Alternatives to the Proposed Project.
A. The Proposed Project
1. Site Proposal History
Over the past 20 years, the project site has been the subject of similar residen-
tial development proposals, the first of which was previously approved by the
Nevada County Board of Supervisors in 1990. Past projects seeking approval
by the Town of Truckee (Town) include the Tahoe Boca proposal in 2003
and the Canyon Springs proposal in 2007.
The Tahoe Boca (2003) proposal consisted of a tentative map, planned devel-
opment, and easement abandonment application to create 250 for-sale single-
family housing lots, including 19 affordable housing lots.
The Canyon Springs (2007) proposal, an application similar to the Tahoe Bo-
ca proposal, consisted of 213 housing lots, including 32 affordable housing
lots. A Draft EIR was prepared for the Canyon Springs (2007) proposal and
public and agency comment was submitted to the Town. However, the ma-
jority of property changed ownership in 2009 and the original application,
which was the subject of the 2007 Draft EIR, was closed, and the Draft EIR
was withdrawn.
A summary of the proposed project’s features is provided below. A compari-
son of the more noteworthy changes between the proposed project and the
previous proposals was provided on the Notice of Preparation, which is in-
cluded in Appendix A of this Draft EIR. A complete description of the pro-
ject is included in Chapter 3 of this Draft EIR.
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2. Project Characteristics
The proposed project includes the approval of a tentative map application to
subdivide six parcels comprising 283.76 acres. The project would result in the
phased construction of a new residential subdivision with a total of 185 resi-
dential lots and 4.5 miles of public trails in the Town. The new subdivision
would be organized around new streets, and public open spaces and wildlife
corridors, as shown on the project site plan (Figure 3-5 in Chapter 3 of this
Draft EIR). Supporting infrastructure, including roadways, on- and off-site
utilities, and trails, would span an eight-year period and coincide with imple-
mentation of eight development phases and recordation of up to eight final
maps. Key project features include:
¤ Housing Lots: The project would include 185 housing lots ranging in
size from 14,000 to 31,000 square feet. 177 of the lots would be for-sale
market-rate lots and eight lots would be affordable housing lots to be
sold, developed, or donated for future multi-family attached housing.
¤ Open Space and Recreation Area: Under the proposed project a total
of 176.17 acres is included as public open space. The public open space
would be permanently reserved as part of the home owner association-
maintained common area and would serve as a wildlife habitat and
movement corridor. The project includes a 24,015-square-foot recrea-
tional area to be centrally located within the project site to serve as a
neighborhood center and would be available for use by future residents.
The recreational area could include features such as a tot-lot, swing set,
play structure, picnic shelter, pool, clubhouse, and/or multi-use play
court.
¤ Vehicular Circulation: New internal roads would be created through-
out the project area and would connect at various points with two links
to the surrounding area. The project would include two vehicular access
points—one for emergency access only and one for unrestricted access.
The primary access point would connect to Martis Peak Road to the
north of the project site. The secondary, emergency-access-only, access
point would connect to Edinburgh Drive to the west of the project site.
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The project’s roadway network includes four bridges, all of which would
be located outside of any mapped 100-year floodplains.
¤ Trail System: The project includes a publicly-accessible 4.5-mile trail
system made up of both 2-foot-wide soft-surface earthen trails and 12-
foot-wide gravel trails. The public access points utilize existing trail
alignments to provide connectivity to the surrounding community for
permitted and lawful use of on-site trails by the public. The trails would
be accessible for summer and winter non-motorized uses such as hiking,
running, mountain biking, equestrian use, cross country skiing, and
snowshoeing. Motorized vehicles would not be allowed.
¤ Public Services and Utilities: Public services and utilities for the project
site would be provided by:
Ÿ Truckee Fire Protection District
Ÿ Truckee Police Department
Ÿ Tahoe Truckee Unified School District
Ÿ Truckee-Donner Recreation and Park District
Ÿ Truckee-Donner Public Utilities District (water)
Ÿ Truckee Sanitary District (sewer)
Ÿ Tahoe-Truckee Sanitary Agency (sewer)
Ÿ Tahoe Truckee Sierra Disposal (solid waste)
Ÿ Southwest Gas (natural gas)
Ÿ Liberty Energy – California Pacific Electric Company (electricity)
Ÿ AT&T (telephone)
Ÿ Suddenlink Communications (cable)
There is currently no utility infrastructure in place to serve the project.
The project will include the installation of on-site, underground infra-
structure for natural gas, electricity, water, sewer, telephone and cable,
and off-site, underground improvements to the Truckee-Donner Public
Utilities District (water) network.
The project includes the establishment of the Canyon Springs Home-
owners Association, which would provide the following services:
Ÿ Snow removal and road maintenance, until revenue neutrality is
reached;
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Ÿ Drainage maintenance;
Ÿ Trail and open space maintenance; and
Ÿ Recreational area maintenance.
¤ Drainage and Grading: All proposed building envelopes would fall
outside of the Town-required 50-foot setback from designated 100-year
floodplains for two blue-line waterways.1 A minimum 50-foot building
setback would be maintained along all other on-site ephemeral drainages,
as shown in Figure 3-6.2 Surface drainage from impervious surfaces locat-
ed within the proposed restricted building envelopes will be collected,
treated, and contained on-site using low impact development methods of
drainage treatment. Infiltration trenches, rainwater gardens, and small
retention, or subsurface structures, would be utilized. Treatment of
paved roadway surfaces will be directed to onsite retention basins, infil-
tration trenches, and/or bio-swales designed to accommodate a 20-year, 1-
hour storm event per Town and the Regional Water Quality Control
Board (RWQCB), Lahontan Region requirements. Grading for on- and
off-site infrastructure and roadways would be balanced on-site, although
temporary stockpiles would be used.
B. Areas of Controversy
The following is a discussion of issues that are likely to be of particular con-
cern to agencies and interested members of the public during the environmen-
tal review process. While every concern applicable to the CEQA process is
addressed in this EIR, this list is not necessarily exhaustive, but rather at-
tempts to capture those concerns that are likely to generate the greatest inter-
1 A blue-line stream is one which flows for most or all of the year and is
marked on a 7.5-minute series USGS topographic quadrangle map with a solid blue
line.
2 A 50-foot setback is a requirement imposed where structures proposed on par-
cels with an average depth of 175 feet or more shall be set back a minimum of 50 feet
from the edge of the 100-year floodplain of any stream, per Town of Truckee Devel-
opment Code Section 18.38.040.A.2.a.
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est based on the input received during the scoping process for this EIR and
the comments provided on the 2007 Canyon Springs Draft EIR.
¤ Aesthetics/Visual Resources. The project would involve the develop-
ment of privately owned undeveloped land to a residential subdivision.
Some members of the public have expressed concern regarding the visual
impacts of developing on the steep slopes, tree removal, and loss of natu-
ral scenery, within the project site. Residents have requested a larger
greenbelt between the proposed project and existing homes to compen-
sate for loss of visual resources, and that new buildings are designed to be
consistent with the ‘character of Truckee.’
¤ Air Quality/Greenhouse Gas Emissions. Comments expressed con-
cerns regarding air quality impacts as a result of heavy construction due
to the release of nitrogen oxide (NOx) and particulate matter (PM10 and
PM2.5) chemicals. There is also an identified concern from the communi-
ty for reducing greenhouse gas (GHG) emissions and achieving a net zero
energy project and climate change-related impacts as a result of tree re-
moval.
¤ Biological Resources/Wetland Habitat/Wildlife Corridor. Concerns
were voiced over impacts to the Loyalton-Truckee mule deer herd habi-
tat and call for establishment of a migration corridor to protect the mule
deer. Some comments express concern for increases in bear activity and
request “bear proof” trash cans in new residences (with locked lids) to
keep bear and dangerous wildlife away.
¤ Cultural Resources. Some comments identify the need for consultation
and review with the Native American Heritage community and for an
evaluation to assess if there are any archeological resources present on the
property.
¤ Hazards and Hazardous Materials. Some members of the public voiced
concern over an electrical substation located near future development
parcel and its effects on the health of citizens. There is also concern that
the project would compromise safety in case of fire and will limit emer-
gency evacuation routes.
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¤ Hydrology and Water Quality. Some members of the public expressed
concerns regarding the provisional distribution of water to the subdivid-
ed areas and its effects on the current residents’ water supply. Comments
claim that in the past the water quality has deteriorated, causing water to
turn ‘milky’ due to a problem of ‘pump cavitation’ and a concern that
the proposed project will decrease surface water retention and infiltra-
tion. Runoff impacts and impacts to drainage facilities are concerns re-
quested to be addressed in the EIR.
¤ Land Use and Planning. Some comments request a comprehensive ex-
planation of density including secondary units. Some comments request
clarification if buildings and/or parcels are proposed within open space
and if building setbacks are being counted towards required open space.
The increase of new residents in the neighborhood is a concern. Some
commentors are concerned that the current residents’ utilities will be
burdened by the future residents.
¤ Noise. There is concern about increased noise pollution due to long-
term construction and the increased density of homes.
¤ Public Services and Recreation. Some comments expressed a concern
that the project will lead to overcrowding at Glenshire Elementary, a de-
crease in emergency service/fire response time, a reduction in recreation-
al opportunities, and impacts to Glenshire-Devonshire Home Owner’s
Association amenities. There is concern that the project will potentially
destroy open space. The community is also concerned with an analysis
of how emergency services can adequately respond to catastrophes (such
as large fires) with only two points of egress from the greater Glenshire
area.
¤ Traffic and Transportation. Concerns were voiced over existing inter-
section safety and roadway capacity as a result of new vehicle trips to and
from the site. There is concern that increased traffic flows will lead to
decreased property values along those routes and will result in roadway
hazards in winter conditions and risk pedestrian and bicycle safety from
increased traffic are a concern. Commenters requested using data from
when school is in session versus the summer PM peak standard currently
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used. Members of the public have expressed concern with the difficulties
in entry and exit at the Martis Peak Road/Glenshire Drive intersection.
There is a safety concern for children coming home from Glenshire
School. New sidewalks, bike paths/lanes, and the widening of roads in
the Glenshire Area are requested to alleviate the danger of additional traf-
fic. There are concerns that child safety is compromised due to expected
increased traffic in the neighborhood.
¤ Property Value/Economics/Quality of Life. While not a topic evalu-
ated under CEQA, some commentors expressed concern with the feasi-
bility of the project. The fiscal impacts on the schools and public services
are of large concern (supply of more buses, increased water and electricity
costs, etc.). Some commentors expect a financial impact on elementary
school capacity due to future construction costs. There are concerns
about decreased property values and ghost development. Another con-
cern is that the project may lead to an increase in second-home owners
which could further reduce year-round homeowners’ values in the local
market within the current economy. There is fear that high density will
affect the quality of life in Glenshire.
C. Alternatives to the Project
This Draft EIR analyzes alternatives to the proposed project that are designed
to reduce the significant environmental impacts of the project and feasibly
attain some of the project objectives. The following alternatives were ana-
lyzed in detail.
¤ Alternative A: No Project. This alternative is required under CEQA,
and describes the effects of taking no action or not receiving project ap-
proval. This alternative provides a general discussion of what would rea-
sonably be expected to occur on the project site if the proposed project is
not approved. This alternative introduces a “no build” concept despite
the fact that the Town has zoned the project site for residential develop-
ment.
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¤ Alternative B: Edinburgh Drive Open Access (185 Lots). This alter-
native is the same as the proposed project, except that unrestricted access
to the site would be provided via Edinburgh Drive to the west of the site,
in addition to the Martis Peak Road access point. Under this alternative
the project density and the site plan would be the same as the proposed
project.
¤ Alternative C: No Open Space Crossing (185 Lots). This alternative
would result in the same size and number of residential lots as the pro-
posed project. However, under Alternative C, the proposed vehicular
roadway that spans the portion of the open space area would be gated
and restricted to use by emergency vehicles only. Subsequently, the ac-
cess point that connects to Martis Peak Road to the north of the project
site and the access point that connects to Edinburgh Drive to the west of
the project site would both be restricted (meaning there would be no
open through connection from Edinburgh Drive to Martis Peak Road).
Similar to the proposed project, the roadway network under Alternative
C would include four bridges that would be located outside of the 100-
year floodplain similar to the proposed project.
¤ Alternative D: Medium Density Cluster (185 Lots). This alternative
would reduce the lot size for each of the 185 proposed residential lots,
which would decrease the overall development footprint and increase the
open space area from that of the proposed project. Under Alternative D,
the residential lots would be organized consistent with the Medium Den-
sity Residential Cluster standards outlined in Table LU-7, Cluster Devel-
opment Types and Applicable Land Use Designations, in the Land Use
Element of the Town of Truckee 2025 General Plan. As such, the residen-
tial lots would cover approximately 54 acres (approximately 3 to 4 dwell-
ing units/acre) and public open space areas would cover approximately
230 acres, an increase of 54 acres of open space from that of the proposed
project.
¤ Alternative E: Reduced Density (88 Lots). This alternative describes a
reduced density development project design in which there would be a 53
percent reduction in the number of residential lots from the proposed
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185 lots to approximately 88 lots. Under this alternative, the site plan
would essentially be the same as the proposed project; however, the lot
sizes would be greater than the proposed project. The development
footprint would not be reduced from that of the proposed project. Un-
der this alternative, the private open space between the residential units
would be greater than that of the proposed project due to the larger lot
sizes and reduced density. Overall, the project density would also be less
than that of the proposed project.
Please see Chapter 5, Alternatives to the Proposed Project, of this Draft EIR,
for more information on these alternatives and on alternatives that were con-
sidered but not carried forward for detailed analysis. Alternatives B through
E are shown in Figures 5-1, 5-6, 5-7, and 5-8.
D. Summary of Impacts and Mitigation
Under CEQA, a significant impact on the environment is defined as a sub-
stantial, or potentially substantial, adverse change in any of the physical con-
ditions within the area affected by the project, including land, air, water, min-
erals, flora, fauna, ambient noise, and objects of historic and aesthetic signifi-
cance.
The proposed project has the potential to generate significant environmental
impacts in a number of areas. As shown in Table 2-1, the significant impacts
would be reduced to a less-than-significant level if the mitigation measures
recommended in this report were implemented.
CEQA allows environmental issues for which there is no likelihood of a sig-
nificant impact to be “scoped out” during the EIR scoping process, and not
analyzed further in the EIR. The project would have no impact on mineral
resources due to its existing site conditions and surrounding uses. This issue
has therefore not been analyzed further in this Draft EIR.
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Table 2-1 presents a summary of impacts and mitigation measures identified
in this report. It is organized to correspond with the environmental issues
discussed in Chapter 4.
The table is arranged in four columns: 1) environmental impacts, 2) signifi-
cance prior to mitigation, 3) mitigation measures, and 4) significance after
mitigation. A series of mitigation measures is noted where more than one
measure may be required to achieve a less-than-significant impact. For a
complete description of potential impacts and suggested mitigation measures,
please refer to the specific discussions in Chapter 4.
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LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-11
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
AESTHETICS
Project and cumulative impacts related to aesthetics would be less than significant and no mitigation measures are required.
AGRICULTURE AND FORESTRY RESOURCES
Project and cumulative impacts related to agriculture and forest resources would be less than significant and no mitigation measures are required.
AIR QUALITY
AIR-1: Implementation of the proposed project
would conflict with the goals and policies of the
Town of Truckee’s Particulate Matter AQMP.
S AIR-1: Each residence shall be equipped with a non-wood burning source of
heat. Prior to issuance of any temporary or final certificates of occupancy or
prior to recordation of the final map, the applicant shall pay an air quality miti-
gation fee to the Air Quality Mitigation Fund to offset PM10 emissions from
solid fuel burning appliances. With payment of offset fee, any solid fuel burn-
ing appliances shall be EPA Phase II Certified and limited to one wood-burning
appliance per residence. The amount of the fee shall be established by the
Town Council resolution and in effect at the time of the building permit issu-
ance or final map recordation. The fees collected will be used to reduce particu-
late matter emissions from existing sources within the Truckee Air Basin in-
cluding improvements to street sanding and sweeping operations to reduce re-
entrained road dust emissions.
LTS
AIR-2: The effects of construction activities
would be increased dustfall and locally elevated
levels of PM10 downwind of construction activity.
Construction dust would be generated at levels
that would create an annoyance to nearby proper-
ties.
S AIR-2: The project applicant shall submit a construction plan for the project
which includes the following conditions:
¤ Open burning of vegetative material shall be prohibited. Among suitable
alternatives are chipping, mulching, or conversion to biomass fuel.
¤ The applicant shall be responsible for ensuring that adequate dust control
measures are implemented in a timely manner during all phases of project
development and construction.
LTS
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TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
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Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
AIR-2 continued ¤ Temporary traffic control shall be provided during all phases of construc-
tion to improve traffic flow as deemed appropriate by local transportation
agencies.
¤ Construction activities shall be scheduled to direct traffic flow to off-peak
hours as much as practicable.
¤ All material excavated, stockpiled, or graded shall be sufficiently watered,
treated, or covered to prevent fugitive dust from leaving the property
boundaries and causing a public nuisance or violation of ambient air stand-
ards during the dry season. Watering shall occur at least twice daily, with
complete site coverage during the dry season.
¤ The project sponsor shall pave all access points or aprons onto Town streets
prior to construction of Phase 1. The aprons shall be flushed and swept a
minimum of once per day.
¤ All areas with vehicle traffic shall be watered or have dust palliative applied
as necessary for regular stabilization of dust emissions.
¤ All on-site vehicle traffic shall be limited to a speed of 15 miles per hour
(mph) on unpaved roads.
¤ All inactive portions of the development site (previously graded areas which
remain inactive for 96 hours) shall be covered, seeded, or watered until a
suitable cover is established. Alternatively, the applicant may apply Town-
approved non-toxic soil stabilizers (according to manufacturer’s specifica-
tions) to all inactive construction areas in accordance with the local grading
ordinance.
¤ All material transported off-site shall be either sufficiently watered or secure-
ly covered to prevent public nuisance, and there must be a minimum of six
inches of freeboard in the bed of the transport vehicle.
¤ Wheel washers shall be installed where project vehicles and/or equipment
enter and/or exit onto paved streets from unpaved roads. Vehicles and/or
equipment shall be washed prior to each trip if necessary.
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TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-13
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
AIR-2 continued ¤ Grid power shall be used (as opposed to diesel generators) for job site power
needs where feasible during construction.
¤ All self-propelled off-road diesel-powered equipment and vehicles greater
than 25 horsepower shall be equipped with an engine meeting at least Tier 2
emission standards.
¤ Prior to final occupancy, the applicant shall re-establish ground cover on the
site through seeding and watering in accordance with Town of Truckee re-
quirements.
AIR-3: Regional operation emissions would fall
within NSAQMD’s Level B threshold. Implemen-
tation Mitigation AIR-1 and the following mitiga-
tion measure would bring the operation of the
proposed project into compliance with the re-
quirements of the NSAQMD.
S AIR-3: Residential open burning shall be prohibited within the project. LTS
BIOLOGICAL RESOURCES
BIO-1: Removal of Jeffrey pine and sagebrush
habitat could potentially impact Sierra Nevada red
foxes if suitable den sites occur on the project site.
S BIO-1: Prior to the start of construction for each phase of development, a qual-
ified biologist selected by the Town of Truckee shall survey the project site to
determine if any burrows or other den sites suitable for use by Sierra Nevada
red fox are present. The selected surveyor shall coordinate with CDFG to de-
termine an acceptable survey methodology. If no evidence of this species is
found during field surveys, no further measures are required.
If an active Sierra Nevada red fox den is identified on the project site, CDFG
shall be contacted to determine how to proceed. It may be possible to proceed
with construction with implementation of appropriate avoidance and minimi-
zation measures (e.g. no-disturbance buffers, seasonal work windows) to pre-
vent incidental take of Sierra Nevada red fox. If incidental take cannot be pre-
vented, it may be necessary to obtain an incidental take permit from CDFG,
pursuant to Section 2081 of CESA, before construction may proceed.
LTS
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TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-14
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
BIO-2: Removal of Jeffrey pine and sagebrush
habitat could potentially disturb nesting birds,
including yellow warblers, if this species in nesting
on the project site.
S BIO-2: The following shall be implemented to mitigate potential impacts to
nesting yellow warblers. These measures shall apply to activities associated
with construction of infrastructure (e.g., roads, utilities) and also to future home
construction.
¤ All trees, shrubs, and other vegetation that is to be removed within the pro-
posed work area shall be removed during the non-nesting season, between
September 16 and February 28.
¤ If vegetation removal is not possible during the non-nesting season, a quali-
fied biologist selected by the Town of Truckee shall survey the proposed
work area and lands within a 500-foot radius (this area may be decreased due
to property access constraints) for nesting birds. The nesting survey shall be
conducted within 14 days prior to the start of construction.
¤ If no active nests are discovered, work can proceed.
¤ If an active nest is discovered, the project proponent shall implement one of
the following two approaches:
• A no-disturbance buffer shall be established around the active nest(s) us-
ing orange construction fencing (or equivalent). For raptors, the buffer
shall be established at a 500-foot radius; for non-raptors, the buffer shall
be established at a 100-foot radius. The fencing marking the buffer shall
be maintained in place until construction is complete, the young have
fledged, or the nest fails (the latter two shall be determined by a quali-
fied biologist); or
• A qualified biologist selected by the Town of Truckee shall evaluate the
potential for the proposed project to disturb nesting activities. The
evaluation criteria shall include, but are not limited to, the loca-
tion/orientation of the nest in the nest tree, the distance of the nest
from the proposed work area, and line of sight between the nest and the
proposed work area. CDFG shall be contacted to review the evaluation
and determine if the project can proceed without adversely affecting
LTS
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TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-15
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
BIO-2 continued nesting activities. If work is allowed to proceed, at a minimum, a quali-
fied biologist shall be on-site during the start of construction activities
during the nesting season to monitor nesting activity. The monitor
shall have the authority to stop work if it is determined the project is
adversely affecting nesting activities.
The above measures shall be repeated, as necessary, in accordance with the phas-
ing of project construction.
BIO-3: Installation of the wood piles for the pe-
destrian trail footbridges would impact wetlands
and non-wetland waters present on the project site.
S BIO-3: The following shall be implemented to mitigate potential impacts to
wetlands and non-wetland waters.
¤ Wetlands and non-wetland waters permanently impacted during construc-
tion shall be mitigated by one of the following methods or by using a com-
bination of the methods.
• Preservation, creation, and/or restoration of the impacted resources at a
minimum ratio of 2:1 (creation could potentially be implemented at a
1:1 ratio if completed and functional prior to the start of construction).
• Purchase of credits at an approved mitigation bank at a minimum 1:1
mitigation ratio.
• Payment of in-lieu fees per the current ACOE, Sacramento District in-
lieu fee schedule.
¤ All mitigation lands shall be protected in perpetuity through recordation of
a conservation easement or equivalent method.
¤ Prior to issuance of a grading permit or other authorization to proceed with
project construction, the project proponent shall obtain any regulatory
permits that are required from the Army Corps of Engineers, Regional Wa-
ter Quality Control Board, and/or California Department of Fish and
Game.
¤ The project proponent shall obtain a Minor Use Permit pursuant to Section
18.46.040.C of the Town of Truckee Development Code.
LTS
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TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-16
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
BIO-4: Removal of Jeffrey pine habitat and snags
could potentially disturb roosting bats if active
roosts are present on the project site.
S BIO-4: The following shall be implemented to mitigate potential impacts to
roosting bats. All snags and potential roost trees (i.e. 20 inches in diameter at
breast height (dbh) or greater) within the project impact area shall be removed
between September 1 and October 14, or between February 16 and April 14.
Removal of trees during these periods would avoid impacts to any bats occur-
ring on the project site during the normal breeding season (April 15 to August
30) and winter torpor (October 15 to February 15). Removal shall occur as
follows:
¤ At least two days prior to removal of snags and potential roost trees, con-
struction activities shall commence in the vicinity of the potential roost(s) to
expose bats potentially using the roosts to the sounds and vibrations of
equipment with the intention of causing the bats to leave the roost, thus
avoiding potential injury when the roost is removed.
¤ Equipment and vehicles shall not be operated under potential roost trees
that would not be removed to prevent exhaust fumes from filling roost cavi-
ties.
Alternatively, all potential roost trees within the project impact area shall be
surveyed by a qualified biologist to determine if any trees can be excluded as
suitable bat roosts due to the lack of suitable structural characteristics. If
any trees can be excluded as bat roosts, removal of these trees would not be
subject to the seasonal restrictions described above.
The above measures shall be repeated, as necessary, in accordance with the phas-
ing of project construction.
LTS
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REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-17
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
CULTURAL RESOURCES
CULT-1: Increased use of the project site and pro-
ject ground-disturbing activities could have signifi-
cant impacts on prehistoric archaeological deposits
that qualify as “historical resources” under CEQA.
S CULT-1a: All surface remains from prehistoric sites P-29-2838/CA-NEV-1760
and P-29-2839/CA-NEV-1761 shall be collected, analyzed, and reported upon,
leaving potential subsurface archaeological deposits intact and undisturbed.
Additional study at both sites shall be conducted, including the following activi-
ties:
¤ Field artifact technical analysis prior to project ground-disturbing activities;
¤ 100 percent collection of all surface artifacts;
¤ Submittal of a small representative sample of collected artifacts for basalt
sourcing analysis; and
¤ Completion of a catalog of items collected and preparation of a brief report
presenting findings of the lithics analysis.
The final report and catalog shall be submitted to the NCIC; artifacts collected
from these sites shall be curated in an appropriate facility to allow for future
research and public interpretation of the collection.
Prehistoric sites P-29-2838/CA-NEV-1760 and P-29-2839/CA-NEV-1761 shall
remain within protected open-space areas to avoid impacts from ground-
disturbing activities. During project construction, a protective buffer shall be
maintained by installing temporary fencing around each site; this activity shall
be directed by a professional archaeologist. Fencing shall be removed after
project ground-disturbing activities cease.
The Town shall be responsible for ensuring that the stipulations of Mitigation
Measure CULT-1a are completed. The applicant shall be responsible for fund-
ing implementation of this mitigation measure.
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-18
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
CULT-1 continued CULT-1b: In the event that archaeological materials are discovered during pro-
ject activities, the applicant shall inform its contractor(s) of the archaeological
sensitivity of the project site by including the following italicized measures in
contract documents. The Town shall verify that the following language is in-
cluded in the appropriate contract documents:
“If prehistoric or historical archaeological deposits are discovered during project ac-
tivities, all work within 25 feet of the discovery shall be redirected and a qualified
archaeologist contacted to assess the situation, consult with agencies as appropriate,
and make recommendations regarding the treatment of the discovery. Project per-
sonnel shall not collect or move any archaeological materials or human remains
and associated materials. Archaeological resources can include flaked-stone tools
(e.g. projectile points, knives, choppers) or obsidian, chert, basalt, or quartzite
toolmaking debris; bone tools; culturally darkened soil (i.e. midden soil often con-
taining heat-affected rock, ash and charcoal, shellfish remains, faunal bones, and
cultural materials); and stone-milling equipment (e.g. mortars, pestles, handstones).
Prehistoric archaeological sites often contain human remains. Historical materials
can include wood, stone, concrete, or adobe footings, walls, and other structural
remains; debris-filled wells or privies; and deposits of wood, glass, ceramics, metal,
and other refuse.”
CULT-2: Pleistocene sediments underlie the pro-
ject site and have the potential to contain paleonto-
logical resources. Should project ground-
disturbing activities encounter such resources, a
substantial adverse change in their significance (e.g.
their disturbance or destruction) would constitute
a significant impact under CEQA.
S CULT-2: In the event that fossils are discovered during project activities, the
applicant shall inform its contractor(s) of the paleontological sensitivity of the
project site by including the following italicized language in contract docu-
ments. The Town shall verify that the following language is included in the
appropriate contract documents:
“The subsurface at the construction site may be sensitive for paleontological re-
sources. If paleontological resources are encountered during project subsurface con-
struction, all ground-disturbing activities within 25 feet shall be redirected and a
qualified paleontologist contacted to assess the situation, consult with agencies as
appropriate, and make recommendations for the treatment of the discovery.
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-19
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
CULT-2 continued Project personnel shall not collect or move any paleontological materials. Paleon-
tological resources include fossil plants and animals, and such trace fossil evidence
of past life as tracks. Ancient marine sediments may contain invertebrate fossils
such as snails, clam and oyster shells, sponges, and protozoa; and vertebrate fossils
such as fish, whale, and sea lion bones. Vertebrate land mammals may include
bones of mammoth, camel, saber tooth cat, horse, and bison. Paleontological re-
sources also include plant imprints, petrified wood, and animal tracks.”
GEOLOGY, SOILS, AND SEISMICITY
GEO-1: The concealed fault trace identified on
the project site could be unstable and could expose
people or structures to potential substantial ad-
verse effects, including the risk of loss, injury, or
death involving rupture of a known earthquake
fault and potentially result in on- or off-site land-
slide, lateral spreading, subsidence, liquefaction, or
collapse.
S GEO-1: Prior to approval of the final map, the project applicant shall obtain a
Town-approved qualified geologist to perform trenching in the vicinity of the
concealed fault trace on the project site to determine whether an active or po-
tentially active fault is present.
LTS
GEO-2: The five areas adjacent to on-site drainag-
es noted as areas of potential landslides on Figure
4.6-2 of the Draft EIR could expose people or
structures to potential substantial adverse effects,
including the risk of loss, injury, or death involv-
ing a landslide.
S GEO-2: Existing landslides shall be repaired to prevent further landslides dur-
ing the construction phase corresponding to the landslide location.
LTS
GEO-3: During grading and earthwork on the
project site soil erosion and the loss of topsoil may
occur.
S GEO-3: The project applicant shall be responsible for preparing a site-specific
erosion control and grading plan to be implemented during all phases of con-
struction and subject to review and approval by the Town of Truckee Public
Works Department and the Nevada County Public Works Department. The
site-specific erosion control and grading plans shall utilize Best Management
Practices (BMPs) in accordance with the California Stormwater Quality Associa-
tion Stormwater Best Management Practice Handbook to ensure that pre-project
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-20
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
GEO-3 continued flows are equal to or less than post-project flows. The BMPs shall include one
or more of the following:
1. Directing some of the flow to sheet discharge onto grassy areas or open
space.
2. The placement of water quality interceptor devices.
3. Use of rock-lined ditches below pipe outlets.
4. Vegetated grass lined swales.
5. Minimizing drainage concentration from impervious surfaces.
6. Construction management techniques.
7. Erosion protection at culvert outfall locations.
GREENHOUSE GAS EMISSIONS
Project and cumulative impacts related to GHG emissions would be less than significant and no mitigation measures are warranted.
HAZARDS AND HAZARDOUS MATERIALS
HAZ-1: The introduction of residential homes in
an area of dense vegetation and forested land could
expose people or structures to a significant risk of
loss, injury, or death involving wildland fires.
S HAZ-1a: The project applicant shall submit a fire safety and fuel modification
plan that provides for (1) adequate safety for emergency fire equipment and
evacuating residents and visitors, (2) a point of attack or defense from a wild-
fire, and (3) strategic siting of fuel breaks, fire breaks, and greenbelts. Fuel mod-
ification shall include (1) underbrush, dead and dying branches from trees shall
be removed up to a minimum of 100 feet from the perimeter of all structures,
(2) all flammable vegetation within 10 feet from the edge of road and driveway
pavement shall be removed, and (3) all flammable vegetation within 30 feet of
all structures shall be removed. The plan shall be reviewed and approved by the
Truckee Fire Protection District prior to the issuance of building permits.
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-21
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HAZ-1 continued HAZ-1b: The project applicant shall ensure that fire flow be provided to each
hydrant at a rate of no less than 1,000 gallons per minute for a duration of two
minutes in residential areas, with the provision that any residential dwelling
exceeding 3,600 square feet shall be required to have no less than a fire flow rate
of 1,500 gallons per minute.
HYDROLOGY AND WATER QUALITY
HYDRO-1: The proposed project would involve
grading, excavation, and potential cut and fill activ-
ity. Ground disturbance associated with construc-
tion activities has the potential to cause erosion of
exposed surfaces during rainfall events and snow-
melt. Runoff has the potential to cause sedimenta-
tion of on-site and off-site watercourses.
S HYDRO-1a: Prior to approval of improvement plans, a grading plan shall be
prepared for the project site that contains the following provisions:
¤ Identify areas where topsoil is to be salvaged prior to grading for later reuse
on-site.
¤ Identify and protect areas not planned to be disturbed to the greatest extent
practicable using temporary fencing or other methods.
¤ Limit cuts and fills and balance cut and fill on-site.
¤ Limit grading to the smallest practical area of land.
¤ Limit exposure of disturbed soils to the shortest practical amount of time.
The National Pollutant Discharge Elimination System (NPDES) permit re-
quires that disturbed soils are temporarily stabilized within 14 days of dis-
turbance.
¤ Establish a winterization plan such that all disturbed soil areas are stabilized
by October 15th of each construction year (per NPDES requirements).
¤ Permanently stabilize graded/disturbed areas through soil loosening, appli-
cation of salvaged topsoil, establishment of native vegetation and application
of native mulch material. The State Water Resources Control Board
(SWRCB), “Sediment Source Control Handbook” provides field-tested
guidelines for revegetating and permanently stabilizing disturbed soil areas
in the Tahoe-Truckee area.
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-22
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-1 continued ¤ Create grading contours that blend with the natural contours on-site or with
contours on property immediately adjacent to the area of development.
¤ Locate and design roadways, parking areas, trails, and paths to blend in with
the natural terrain.
¤ Limit development on steep slopes in order to minimize erosion.
HYDRO-1b: Best Management Practices (BMPs) shall be applied during con-
struction to minimize erosion and sedimentation. A stormwater pollution pre-
vention plan (SWPPP) shall be prepared and submitted prior to ground disturb-
ing activities that specifies what specific measures will be implemented to pro-
tect water quality and minimize erosion during construction. BMPs selected
shall be in accordance with the California Stormwater Quality Association
“Stormwater Best Management Practice Handbook” and the Lahontan Regional
Water Quality Control Board (RWQCB) “Project Guidelines for Erosion Con-
trol.” These guidelines include the following temporary construction BMPs:
¤ Surplus or waste materials shall not be placed in drainage ways or within the
100-year flood plain of surface waters.
¤ All loose piles of soil, silt, clay, sand, debris, or earthen materials shall be
protected in a reasonable manner to prevent discharge of pollutants to wa-
ters of the State. Material stockpiles should be placed on the upgradient side
of excavation whenever possible. Stockpiles should be covered prior to
forecasted rain events and sediment barriers should be installed around
stockpiles at all times.
¤ Dewatering shall be done in a manner so as to prevent the discharge of pol-
lutants, including earthen materials, from the site. The first option is to dis-
charge dewatering waste to land. A separate permit may be required if, due
to site constraints, dewatering waste must be discharged to surface waters.
Contact the Regional Board for information on discharging to surface wa-
ters.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-23
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-1 continued ¤ All disturbed areas shall be temporarily or permanently stabilized by Octo-
ber 15 of each year.
¤ Any soil-disturbing work that is allowed to be performed (which requires a
variance) between October 15 and May 1 of each year shall be conducted in
such a manner that the project can be winterized within 48 hours. Winter-
ized means implementing erosion and/or sediment controls that would pre-
vent the discharge of earthen materials from the site and the controls would
remain effective throughout the rainy/snow season without requiring
maintenance. In general, this requires stabilizing bare disturbed soils with
mulch, erosion protection blankets, or other suitable materials, and in-
stalling perimeter sediment controls such as fiber logs or other similar mate-
rials that would remain effective during significant rain and snow events.
¤ After completion of a construction project, all surplus or waste earthen ma-
terial shall be removed from the site and deposited at a legal point of dispos-
al.
¤ All non-construction areas (areas outside of the construction zone that
would remain undisturbed) shall be protected by fencing or other means to
prevent necessary encroachment outside the active construction zone.
¤ During construction, temporary erosion control measures (e.g. impermeable
dikes, silt fences, wattles, etc.) shall be used as necessary to prevent discharge
of earthen materials from the site during periods of precipitation or runoff.
¤ Control of run-on water from off-site areas shall be managed (protected, di-
verted, treated, etc.) to prevent such water from encountering pollutants be-
fore it is discharged from the site.
¤ Where construction activities involve the crossing and/or alteration of a
stream channel, such activities require a prior written agreement with the
California Department of Fish and Game (CDFG) and shall be timed when-
ever possible to occur during the period in which stream flow is expected to
be lowest for the year. Other control measures may be necessary to prevent
adverse effects from work in or near surface waters.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-24
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-1 continued ¤ Revegetated areas shall be regularly and continually maintained in order to
assure adequate vegetation growth and root development, mulch surface
cover, and absence of any signs of erosion (rills, gullies, deposition). Revege-
tated areas shall be routinely inspected and maintained as necessary to ensure
continued erosion control effectiveness. The Sediment Source Control
Handbook, a Sierra Business Council publication in collaboration with the
Lahontan Regional Water Quality Control Board, provides field-tested
guidelines for revegetating and permanently stabilizing disturbed soil areas
in the Tahoe-Truckee area.
HYDRO-1c: Additional requirements for Truckee River hydrologic area:
¤ Except in the event of emergencies, land disturbance associated with project
construction is prohibited between October 15th and May 1st of the follow-
ing year. Exemptions may be granted by the Lahontan Executive Officer on
a case-by-case basis.
¤ The project’s SWPPP and erosion control plan shall specify what specific
measures will be implemented to protect water quality and minimize ero-
sion during construction per NPDES permit requirements and Town stand-
ards. The plan shall address storm drainage during construction and propose
site-specific BMPs to prevent erosion and water quality degradation. All
drainage and infiltration facilities shall be constructed to Town specifica-
tions. The plan shall also specify restoration measures for graded areas in-
cluding but not limited to landscaping, revegetation, or other soil stabiliza-
tion methods shown to be effective in the Truckee-Tahoe area.
¤ Low Impact Development (LID) techniques should be utilized during and
after construction. On-site infiltration should be utilized wherever possible
to minimize runoff. Such infiltration features may include wet ponds, de-
tention ponds, infiltration swales, and/or rain gardens between the road sur-
faces and other paved areas. Roof downspouts should be directed towards
on-site infiltration areas away from the building foundations.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-25
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-1 continued ¤ Earthen drainage facilities should be protected immediately following con-
struction using rock riprap, erosion control fabric or other energy dissipa-
tion measures to prevent erosion of the soil surface. In addition, cut slopes
and drainage ways should be protected from direct exposure to water runoff
immediately following grading activities.
¤ Cut and fill embankment slopes shall be protected from sheet, rill, and gully
erosion and shall not exceed 2:1, horizontal to vertical. Run-on areas should
be identified and managed as necessary to prevent concentrated flow from
eroding cut and fill slopes.
HYDRO-2: Following project construction, crea-
tion of impervious surfaces (roads, houses) and
slight changes of local topography has the potential
to alter surface runoff rates and drainage patterns
from the site and increase surface runoff rates, peak
flows, and sediment transport downstream. Urban
runoff from roadways, driveways, and parking lots
may carry metals and petroleum-based contami-
nants to waterways.
S HYDRO-2a: Prior to approval of improvement plans, a grading plan shall be
prepared for the project site that contains the following provisions:
¤ Limit grading to the smallest practical area of land.
¤ Locate and design roadways, parking areas, trails, and paths to blend in with
the natural terrain.
¤ Limit development on steep slopes in order to minimize erosion.
¤ Create grading contours that blend with the natural contours on-site or with
contours on property immediately adjacent to the area of development.
¤ Permanently stabilize graded/disturbed areas through soil loosening, appli-
cation of salvaged topsoil, establishment of native vegetation and application
of native mulch material. The Water Board’s “Sediment Source Control
Handbook” provides field-tested guidelines for revegetating and permanent-
ly stabilizing disturbed soil areas in the Tahoe-Truckee area.
LTS
HYDRO-2b: The following permanent BMPs shall be applied during construc-
tion to minimize alteration of surface runoff rates and prevent associated water
quality and flooding impacts:
¤ Low Impact Development (LID) techniques shall be utilized during and after
construction. On-site infiltration should be utilized wherever possible to
minimize runoff. Such infiltration features may include wet ponds, deten-
tion ponds, infiltration swales, and/or rain gardens between the road
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-26
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-2 continued surfaces and other paved areas. Roof downspouts should be directed to-
wards on-site infiltration areas away from the building foundations. Other
control measures may be considered if site constraints are such that con-
struction of infiltration features is not feasible. Additional specific design
specifications are required by Lahontan RWQCB for the Truckee River
Hydrologic Area (see specific requirements below).
¤ Where possible, existing drainage patterns should not be significantly modi-
fied.
¤ Drainage swales should be stabilized with rock, riprap, erosion control fab-
ric, and/or vegetation as appropriate to prevent erosion and scouring.
¤ Revegetated areas should be regularly and continually maintained in order to
assure adequate vegetation growth and root development, mulch surface
cover, and absence of any signs of erosion (rills, gullies, deposition). Revege-
tated areas shall be routinely inspected and maintained as necessary to ensure
continued erosion control effectiveness. The Water Board’s “Sediment
Source Control Handbook” provides field-tested guidelines for revegetating
and permanently stabilizing disturbed soil areas in the Tahoe-Truckee area.
HYDRO-2c: Additional requirements for Truckee River hydrologic area:
¤ Runoff from impervious surfaces shall be treated or contained on-site. For
purposes of this requirement, the volume of water to be contained or treated
is the 20-year, 1-hour storm, which is equal to 0.7 inches of rain.
¤ Design, construction, and maintenance techniques should ensure develop-
ment near a creek would not cause or worsen natural hazards (such as ero-
sion, sedimentation, flooding, or pollution) and would include appropriate
erosion and sediment control practices such as: (1) turbidity screens and oth-
er management practices, which shall be used as necessary to minimize silta-
tion, sedimentation, and erosion, and shall be left in place until disturbed ar-
eas are stabilized with permanent vegetation that would prevent the
transport of sediment off-site; and (2) temporary vegetation and/or mulch
cover sufficient to stabilize disturbed areas.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-27
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
HYDRO-2 continued ¤ Post-project stormwater flows shall equal pre-project stormwater flows for
the design year event.
¤ Prior to initiation of construction, the project proponent shall demonstrate
that the post-development design storm hydrograph leaving the project is
not changed from pre-project conditions such that downstream drainage
structures (culverts, bridges, etc.) remain adequate post-development. To
this end, soil infiltration rates, stormwater pond capacities and detention
times, and other suggested revisions from the 2007 technical review by Geo-
con shall be incorporated into the construction plans so that Lahontan
RWQCB and the Town can fully evaluate the feasibility of the proposed
drainage design.
LAND USE AND PLANNING
Project and cumulative impacts related to land use and planning would be less than significant and no mitigation measures are required.
NOISE
Project and cumulative impacts related to noise would be less than significant and no mitigation measures are required.
POPULATION AND HOUSING
Project and cumulative impacts related to population and housing would be less than significant and no mitigation measures are warranted.
PUBLIC SERVICES AND RECREATION
Project and cumulative impacts related to public services and recreation would be less than significant and no mitigation measures are warranted.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-28
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
TRANSPORTATION AND TRAFFIC
TRANS-1: The Glenshire Drive/Donner Pass
Road intersection exceeds the LOS thresholds dur-
ing the PM peak hour in 2011 without the pro-
posed project. Implementation of the proposed
project would exacerbate an existing deficiency at
this intersection, as it would result in increased
vehicular delays during the PM peak hour.
S TRANS 1: The project applicant shall construct a center turn lane on Donner
Pass Road to allow two-stage left-turn movements to be made from Glenshire
Drive. The turn lane shall be constructed during Phase 1 of project construc-
tion and prior to any Parcel or Final Map recordation. Project construction
shall not exceed a maximum of 102 single-family lots and eight affordable hous-
ing lots until the completion of the Donner Pass Road Extension is identified in
the CIP, fully funded, or scheduled for completion within three years of the
beginning of Phase 6, or any phase that exceeds 102 single-family lots and eight
affordable lots, of the proposed project.
The construction of the Donner Pass Road Extension is not currently identified
in the CIP, fully funded, and scheduled for completion within three years.
Therefore, the proposed development does not meet the criteria in the General
Plan Circulation Element for an allowable development.
LTS
TRANS-2: The segment of Martis Peak Road that
provides access to the project site is subject to the
Town’s thresholds and would have an ADT vol-
ume exceeding 2,000 vehicles, and it would func-
tion as a collector roadway. This roadway seg-
ment has a total pavement width ranging from 20
to 23 feet and does not meet the adopted standard
for impacts to local residential roadways and im-
pacts local roadways under 2011 conditions.
S TRANS 2: The project applicant shall widen the segment of Martis Peak Road
between Glenshire Drive and the project’s main entrance to provide 12-foot
travel lanes with 2-foot shoulders during Phase 1 of project construction.
LTS
TRANS-3: Based upon the AM and PM peak-
hour traffic volumes, an eastbound left-turn lane is
warranted along Glenshire Drive at its intersection
with Dorchester Drive (West), with or without the
project under 2011 and 2031 conditions.
S TRANS 3: Install an eastbound left-turn lane along Glenshire Drive at its inter-
section with Dorchester Drive (West) during construction Phase 1 of the pro-
posed project. The turn lane shall provide approximately 50 feet of storage
length.
LTS
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
TABLE 2-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES (CONTINUED)
LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact
2-29
Significant Impact
Significance
Before
Mitigation Mitigation Measures
Significance
With
Mitigation
TRANS-4: Construction trips added to Glenshire
Drive/Donner Pass Road or the eastbound left-
turn lane along Glenshire Drive at its intersection
with the western end of Dorchester Drive intersec-
tion would exacerbate these already deficient inter-
sections.
S TRANS-4: A Construction Traffic Management Plan shall be prepared and
approved by the Town’s Public Works Department prior to Phase 1 construc-
tion of the project.
LTS
TRANS-5: The existing pavement width on the
roadway segment on Glenshire Drive east of Mar-
tis Peak Road currently accommodates 11-foot
travel lanes with no shoulder in some locations and
both Nevada County and Town of Truckee road-
way design standards call for 12-foot lanes with
4-foot shoulders, and maximum grade of 8 percent.
The increase in traffic from the proposed project
would exacerbate this existing geometric deficien-
cy.
S TRANS-5: The project applicant shall fund a safety study as well as implemen-
tation of the recommended safety improvements along this roadway segment as
a result of the safety study. The scope and cost of the study should be reviewed
and approved by the Town prior to the study being conducted. Funding shall
be in place prior to the issuance of grading or building permits and safety im-
provements along Glenshire Drive east of Martis Peak Road should be imple-
mented as a part of Phase 1 construction.
LTS
UTILITIES AND SERVICE SYSTEMS
Project and cumulative impacts related to utilities and service systems would be less than significant and no mitigation measures are warranted.
TOWN OF TRUCKEE
CANYON SPRINGS DRAFT EIR
REPORT SUMMARY
2-30