HomeMy WebLinkAboutagenda.council.worksession.20120507 MEMORANDUM
TO: Mayor and City Council
FROM: Transportation, Police, Engineering, Streets and Parks staff
THRU: Randy Ready, Assistant City Manager
RE: West End Traffic Reduction and Traffic Calming Strategies
DATE: May 4, 2012
MEETING DATE: May 7, 2012
SUMMARY AND REQUEST OF CITY COUNCIL
This memo recaps the West End traffic reduction efforts undertaken over the past several years
and outlines additional measures that could be undertaken in summer 2012. Staff is seeking
Council input as to which, if any, measures should be implemented this summer.
PREVIOUS COUNCIL ACTION
At a January 2012 Council work session regarding the temporary relocation of the Aspen County
Day School, Council directed staff to return with measures that could reduce and/or calm West
End traffic. Several traffic reduction/calming measures have been attempted at Council's
direction over the years, as outlined in the discussion portion of this memo.
BACKGROUND
High traffic volumes combined with a lack of capacity through the S-Curves often result in
congestion and slow moving traffic on Main Street during afternoon peak periods. Some drivers
1
respond to this congestion by diverting through the West End, via Smuggler Street, to Power
Plant Road. Excessive speeds have not been identified as an issue in the West End (see
attachment B).
This pattern of using the West End as a secondary means of exiting town results in frustration
and complaints from neighborhood residents, especially during summer months. General traffic
in the West End is also increased in the summer by a number of major events occurring at the
Aspen Music Festival and Aspen Institute facilities. Commute-based complaints typically come
from homes around Smuggler Street and revolve around congestion, noise and speeding. Event-
related congestion, speed and parking complaints often come from homes located near Gillespie,
3rd, 4`h and 5`h Streets. See Attachment C for citizen comments received by staff prior to this
memo's distribution.
Several efforts have been made over the years to discourage the use of Smuggler Street as an
outbound commuter route, as outlined below. In addition, significant shuttle operations are in
place during major events at the Aspen Institute as well as during the Aspen Music Festival's
entire summer season. The Aspen Institute and Aspen Meadows are also founding partners in
the WE-cycle bike share program which will offer an additional West End trip reduction
opportunity in the future.
DISCUSSION
A number of traffic calming and traffic reduction measures are already in place in the West End.
In addition, numerous measures have been attempted and/or vetted by various departments over
the years. The lists below are meant to provide Council with a brief overview of several years'
worth of interdepartmental efforts. Staff from a variety of departments will be on hand on May 7
to provide more information on these items if needed.
2
West End Traffic Reduction/Calming Measures Currently in Place
• Bollards on 7th Street at Bleeker Street, Hallam Street and the alley in between (made
permanent in 2010)
• Free bus service between Aspen and the Brush Creek Intercept lot (which led to free
service currently in place between Aspen and Snowmass Village)
• Seasonal closure of right turns from 7th Street
• Funding of a portion of Aspen Music Festival shuttle service
• Funding of the Cross Town Shuttle transit route
• Funding of additional Cross Town Shuttle service hours during late-night events
• Frequent coordination with Aspen Music Festival, Jazz Aspen Snowmass and the Aspen
Institute in regards to summer events
• Provision of alternative transportation grants to the Aspen Meadows and Aspen Music
Festival via the Transportation Options Program
• Development of robust traffic reduction program related to temporary Aspen Country
Day campus relocation
• Frequent traffic patrol undertaken by Aspen Police Department
• Frequent speed surveys undertaken by Aspen Police Department
• Parking enforcement presence during large events
• Driveway protection kits issued to residents upon request
• Addition of east/westbound stop signs on Francis at 5`h and 6th (installed in 2010)
• Addition of stop signs on Smuggler Street at 5th and 7th(installed in 2009-2010)
• Monarch and Sleeker intersection sightline improvements (underway in 2012)
West End Traffic Reduction/Calming Measures Previously Attempted
• Free 15-minute service between Aspen and the Brush Creek Park & Ride—2007
• No left turns from Power Plant Road or from Cemetery Lane—2009
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• No left turns from Power Plant Road—2010 (suspended due to safety concerns with
increased traffic on Cemetery Lane and numerous U-turn and cross-trail traffic
movements)
• Stay on Main messaging - 2010 and 2011
• 20mph City-wide speed study completed by Engineering - 2010
West End Traffic Reduction/Calming Measures Reviewed but Not Implemented
• Temporary speed bumps on Smuggler—rejected due to emergency vehicle concerns, and
the presence of six stop signs and six valley pans already on Smuggler between 2" and
8th Streets.
• Roaming road closures—rejected due to safety and staffing concerns.
• Additional stop signs—rejected due to lack of effectiveness as well as abundance of stop
signs in the area (see Attachment A).
Possible Measures for Summer 2012
Staff from a variety of departments including Engineering, Transportation, Parking, Parks,
Streets and Environmental Health meet regularly to discuss traffic and pedestrian issues. This
group has contributed the following ideas for measures that could be undertaken and evaluated in
summer 2012.
Additional service hours for Cross Town Shuttle route: The Cross Town Shuttle route could
be operated later into the evening to address the large number of summertime events that occur at
night. The route formerly operated until 11pm, but was reduced by two hours in 2009 as a cost-
savings measure. Extended hours could be provided over the entire summer season, or around
specific events only.
4
Additional Parking Officer: Parking staff cannot be present as much as needed during summer
West End events such as Jazz Fest and Aspen Music Festival concerts. A temporary officer
could focus on evening and weekend enforcement during the summer.
Promotion of Brush Creek Park & Ride: Staff could undertake a major promotion of parking
and carpooling or riding transit from the Brush Creek Park& Ride to reduce overall summer
traffic volumes. The promotion would help draw commuters' attention to the free parking and
free transit service available every 15-30 minutes from the Brush Creek location. Staff suggests a
significant media campaign along with a focused employer effort to include funding for TOP
member campaigns around this effort.
Bollards along Smuggler Street: These bollards could be placed in the middle of selected
blocks of Smuggler Street as a summer traffic calming measure. This would be a low-cost
measure as the supplies are available from the Streets Department. Presence of the bollards will
help to further slow traffic due to the perceived narrowing of the street. A similar approach has
been implemented in the Williams Ranch neighborhood with some success in traffic calming.
Figure A: traffic calming bollard
Designation of 3rd and 5th as through streets: The elimination of north-south stop signs on 3`'
and 5'h Streets could formalize these streets as through routes and potentially eliminate roaming
through the West End prior to large events.
5
Music Festival traffic control: The Aspen Music Festival is currently working with
Transportation and Engineering staff to develop a traffic control plan and to train staff to manage
traffic during particularly large events as a trial to be evaluated at the end of the 2012 season.
Police Traffic Monitoring and Speed Enforcement: APD officers will continue to maintain a
presence and monitor traffic in the West End particularly during the afternoon peak period, as
staffing and call volumes allow.
FINANCIAL IMPACT
Estimated costs for measures that staff recommends considering for summer 2012 are as follows:
Cross Town Shuttle Extended Service $15,000.00*
Additional Parking Officer $12,000.00
Brush Creek Promotion (media and employer) $10,000.00
Bollards installed on Smuggler Street $2.520.00
Designation of 3rd and 5th Streets as Through Routes $0
Music Festival Traffic Control $0
Police Traffic Monitoring $0
TOTAL $39,520.00
If city council approves the menu of recommendations outlined above, the funding will come
from the following sources of departmental savings:
Department Item Amount
Transportation Cross Town Shuttle Service/Brush Creek $26,000.00 (staff time in-kind)
Promotion
Parking Seasonal Parking Officer $12,000.00
Streets Bollards $2,520.00 (labor in-kind)
Police Enforcement in kind
Additional two hours per day for entire summer season. Event-only option would cost approximately$7000.00.
6
•
ENVIRONMENTAL IMPACT
The traffic reduction measures discussed in this memo have the ability to reduce single-occupant
vehicle trips thus reducing air pollution and traffic congestion.
RECOMMENDED ACTION
Staff recommends that the following measures be attempted and evaluated in summer 2012:
• Additional Cross Town Shuttle service
• Seasonal Parking staff
• Brush Creek Promotion
• Bollards on Smuggler Street
• Designation of 3`d and 5th Streets as through streets
• Music Festival traffic control
• APD monitoring and enforcement
ATTACHMENTS
Attachment A: West End map
Attachment B: Aspen Police Department Speed Study Data
Attachment C: Citizen Comments
7
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ATTACHMENT C
CITIZEN COMMENTS
From: Margerum, Amy
Sent: Wednesday, May 02, 2012 1:55 PM
To: Randy Ready
Cc: Mick Ireland
Subject: RE: West End Traffic Calming
Thanks Randy:
My comments are brief:
• We would really appreciate bollards or some more attractive traffic calming measures which
slows traffic down and encourages people to not cut through a residential neighborhood for
commuting purposes. Please please please do this!
• We would really appreciate Local Traffic Only signs on Main Street (please include this option for
Council) As I have pointed out many times previously the City has done this for other
neighborhoods with only a fraction of the problem and it is not costly and would only be about 6
signs on Main Street.
• Channeling traffic down one or two streets is not helpful and makes those residents live with
horrible traffic. This is one reason why Smuggler is taking ALL the traffic because the City closed
off the other entrances to Hwy 82...so I would oppose that option.
• The other suggestions don't do much for traffic as it is commuters primarily causing the
problem, but I am not opposed to them.
Many thanks for being proactive and sending this to me. I would appreciate getting notice of the next
work-session when you are aware of it.
All the best,
Amy
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Dear Council,
I received an email from the City stating that Council will be holding a West End Traffic mitigation work
session on May 7. I again ask that the City make a better effort to make the West End safer during the
Music Festival season, which starts this year with a Food and Wine Concert at the tent, and extends thru
mid August. Tent concerts are major traffic generating events that should require special measures to
protect the safety and enjoyment of the pedestrians, bikers, and residents in this residential
neighborhood:
1. Reduce the speed limit to 15 or 20 in the general area of the tent to be more consistent with
the considerable pedestrian and bike traffic on the streets. Occasional police presence during
concerts will be needed to remind drivers to slow down.
2. Actively and consistently enforce parking regulations near the tent during concerts. This will
require multiple parking enforcement people working Friday evenings and Sunday afternoons,
which are not typical hours for parking personnel. Costs should be covered by the Music
Festival, or considered simply a cost to the City offset by ticket revenue from violations and sales
tax revenue generated by patrons attending the events at the tent. Typical violations that affect
safety are parking at corners blocking site lines and parking that block alleys and driveways.
3. Temporary stop signs should be placed on Gillespie Street at the intersection with 5th Street
(the tent parking lot exit) before concerts and then removed after the concert traffic has
concluded. The large amounts of Pedestrians exiting the tent and walking along the streets
should justify this safety measure.
Thanks for your consideration.
Steve and Debbi Falender
603 W. Gillespie St.
920-1816
-I
MEMORANDUM
TO: Mayor and City Council
FROM: Trish Aragon PE, City Engineer
April Long, PE, Stormwater Manager
THRU: Scott Miller, Capital Asset Manager
DATE OF MEMO: May 1, 2012
MEETING DATE: May 7,2012
RE: Construction Mitigation Program Modifications
REQUEST OF COUNCIL:
Staff seeks Council input regarding modifications to the Construction Mitigation Program rules.
This includes:
1. Interior work hours for construction: Modify the current rules to allow interior work for
24 hours a day for the Core area instead of the CRA. Refer to Attachment A for the CRA
and Core map.
2. Encroachments in the Core: Establish parameters for exemptions
3. Construction Hours: Re-visit allowable construction hours. Current weekday hours are 7
a.m.—5 p.m. for the on-season and 8 a.m. —7 p.m. for the off-season.
4. Erosion and Sediment Control: Modify rules to provide a clearer description of the
requirements and clearer guidance for meeting those requirements.
PREVIOUS COUNCIL ACTION:
City Council approved the creation and implementation of the Construction Mitigation Program
in April of 2006. Below is a timeline of this program.
• April 2006: The City creates the Construction Mitigation Program to reduce the impact
of construction on the general public and to provide a liaison between the City,
contractors, and the general public. This is accomplished by requiring contractors to
submit a plan detailing how they intend to meet all city codes during construction.
• March 2007: The Original Plan Requirement Manual is drafted and presented at a work
session.
• April 2007: Edits from the March 2007 work session are incorporated into the "Plan."
These edits include an established haul route, restricting work hours from 12 hours per
day to 10 hours per day, creating the Aspen Holiday List, which restricts construction on
federal holidays and during special events such as the Food and Wine Classic.
• April 2007: The start and end time for weekday work is altered to 8 a.m.—6 p.m.
Page 1 of 7
• May 2007: The original start and end times, which were 7 a.m. —5 p.m.. are re-instated.
• January 2008: The program is expanded to include inspections on all active projects
regardless of impact. Additional inspections were also added which included sediment
and erosion control and parking.
• May 2009: Three changes/additions were made:
o Manufacturing Restrictions: Require all manufacturing activities to be conducted
offsite, reducing the duration and overall impact to surrounding neighborhoods.
Additionally, if a further modification to the material is required, then the hours of
operation will be limited to 9 a.m. — 5 p.m., Monday through Friday.
o Holiday Hours: Creation of a new geographic zone in town to help address the
impacts of construction while at the same time maintaining a resort atmosphere in
the community. This zone is referred to as the Central Resort Area (CRA). The
geographic boundaries mirror the expanded pay-to-park area. This boundary was
chosen because the area is impacted heavily during special events and the winter/
summer tourist season. The adoption of the CRA allows work in the"non-core"
neighborhoods, which are less impacted during the peak seasons. Below is a
summary of the requirements:
Thanks Xmas Xmas New Years Presidents Memorial Food 4th of Labor
giving Week Day Day Day Day & July Day
Wine
Central Resort dosed dosed dosed dosed dosed dosed dosed dosed dosed
Area(CRA)
Outside CRA dosed open dosed dosed open dosed open dosed dosed
i.e. "non-core"
o Superfund Permitting: Alterations were made to the Smuggler Mountain
Superfund Site Soil Removal Permit to stream line the process and ensure the
sites are captured in regular inspections.
• May 2010: Time restrictions were modified to allow 24-hour interior work in the
CRA. Weekday construction hours were modified to 7 a.m. —5 p.m. during the on-
season and 8 a.m. — 7 p.m. during the off-soon.
BACKGROUND:
1. Interior Work Hours: The current 24-hour interior work policy is for the CRA (refer to
Attachment A) during the off-season reads as follows:
In order for an applicant to gain approval for 24-hour interior work the applicant is required to
make a request to the Engineering Department that demonstrates the work will not cause an
impact to the surrounding neighborhood or tenants. The Engineering Department will evaluate
the request to:
• Determine the level of potential impact if any.
• Evaluate if the proposed activity is better suited for non-traditional hours.
• Evaluate if alternate viable options exist.
Likely examples of interior work that would be permitted:
• Painting
• Drywall texturing/taping/hanging
_ - Page 2 of 7
• Minor plumbing
• Minor electrical
• Cabinet hanging
If a complaint is received for work that is being conducted outside the traditional construction
hours the project's 24 hour construction approvals will be revoked.
2. Encroachments The Municipal Code currently does not allow encroachments, such as
sidewalk closures, pedestrian walkways, street closures or any right-of-way work, in the
Core during the on-season. However, the Code does allow for the City Engineer or City
Council to make exceptions to this section when special circumstances are present where
strict compliance of these regulations would jeopardize the public safety or the expeditious
continuation of the project and granting the exception is in the public interest.
3. Construction Hours The current weekday construction hours are as follows:
On season: 7 a.m. — 5 p.m.
Off season: 8 a.m. — 7 p.m.
4. Erosion and Sediment Control: Current regulations require a stormwater management
plan be completed in accordance with the Colorado Department of Public Health and
Environment (CDPHE) Construction General Permit with no direction or guidance or
specific instruction for process and submittal in Aspen.
DISCUSSION:
1. 24 Hour Rule:
Issue: There is a concern that the 24 hour rule encompasses residential areas in addition to
commercial areas. Attachment C includes a citizen letter supporting the change.
Proposed Changes Staff is proposing to modify the 24 hr work rule to the Core instead of the
CRA.
2. Encroachments
Issue: A concern has been raised about the impacts of encroachments in the Core. Currently
variances from the municipal code have permitted to allow encroachments during the on season
within the Core.
Proposed Changes: Staff is looking for guidance on what parameters should be set for
variances.
3. Construction Hours
Issue: A concern has been raised regarding the off season construction hours. Attachment C
includes a citizen letter regarding construction hours.
Page 3 of 7
Proposed Changes: Staff would like to revisit the hours with Council.
4. Erosion and Sediment Control:
Issue: Current City documents simply refer to a State guiding document and do not provide
dear guidance or explanation for proper preparation, submission, and implementation of
stormwater management plans for construction in Aspen. This causes incomplete or
inadequate plans and failures in the field that result in negative water quality impacts.
Proposed Changes: Staff is proposing changes to Section 8 of the Construction Management
Plan Requirements Manual (CM P Manual) and an appendix to the CM P Manual that details the
requirements and provides guidance for stormwater management during construction in Aspen.
Attachment A: CRA and Core Map
Attachment B: Construction Management Plan Requirements Manual, Appendix A
Attachment C: Citizen Letter Regarding CM P Changes
Page 4 of 7
Attachment A: CRA and Core Map
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Page 5of 7
•
Attachment B: Construction Management Plan
Requirements Manual, Appendix A
Page 6of7 - _ - -
Appendix A
Stormwater Management During Construction
1 .0 PURPOSE
The purpose of this appendix is to provide requirements and guidance for selecting and
implementing Best Management Practices (BMPs) that will eliminate or reduce the discharge of
pollutants from construction and other land-disturbing activities to local waters. Section 8.56 of
Municipal Code adopts the Construction Mitigation Plan to apply to all construction and
development projects in the City of Aspen. The City of Aspen Engineering Department is the
administrative authority for stormwater management and erosion prevention and sediment
control on construction sites within the City's jurisdiction. By policy, Aspen's requirements for
stormwater management during construction are consistent with those of the Colorado
Department of Public Health and Environment's (CDPHE) Construction General Permit. The
CDPHE Construction General Permit requires a stormwater management plan (SWMP) for
development disturbing greater than one acre of land. However, Aspen requires a
Construction SWMP detailing pollution prevention and erosion prevention and sediment
control measures to be installed for projects that exceed 1000 square feet of soil
disturbance, not just those that disturb greater than one acre. Wherever the City of Aspen and
the CDHPE Construction General Permit requirements are in conflict, the more restrictive
requirements should be applied.
The regulations and guidelines stated in this chapter incorporate information from a variety of
sources including:
• The United States Environmental Protection Agency (EPA),
• State of Colorado/Colorado Department of Public Health and the Environment (CDPHE),
• Urban Drainage and Flood Control District (UDFCD), and
• Northwest Colorado Council of Governments (NWCCOG).
It is important to understand that these regulations are subject to change and/or alterations. For
the most up to date copy please contact the City of Aspen Engineering Department.
Some construction activities and materials have the potential to pollute our streams, rivers, and
lakes if transported during storms or snowmelt. When construction disturbs land, the soil is
more easily eroded during rainfall, snowmelt, and wind events. Eroded soil, referred to as
sediment, is the greatest pollutant to rivers in Colorado and Aspen. Sediment endangers water
resources by reducing water quality and causing the siltation of aquatic habitat for fish and other
desirable species. Other pollutants, such as petroleum products, metals, and nutrients, easily
attach to soil making sediment even more toxic. Eroded soil also necessitates the cleaning
and/or repair of sewers and ditches and the dredging of water bodies. Therefore clearing,
grading, and vehicle tracking during construction creates the need for erosion prevention and
sediment control on construction sites.
Pollutants other than sediment, such as concrete, solvents, oil, grease and metals, also cause
degradation of water quality in receiving streams, and therefore must also be prevented or
reduced through construction site stormwater management practices.
1
The City of Aspen requires compliance with the criteria in this chapter in order to
eliminate or reduce the discharge of pollutants in stormwater runoff, and prohibits the
discharge of pollutants from construction sites to the City's stormwater system. These
criteria should be followed from start of earth disturbance until final landscaping and stormwater
quality measures are effectively in place and accepted by the City.
The following erosion prevention, sediment control, and pollution prevention measures are
designed to safeguard persons, protect property, minimize water quality and other
environmental impacts, and promote the public welfare by guiding, regulating, and assisting the
design, construction, use, and maintenance of any development or activity which disturbs or
breaks the topsoil or results in the movement of earth on land greater than 1000 square
feet in the City of Aspen, Colorado.
This appendix provides information for General Requirements and the Permit Process followed
by sections that provide more detailed explanations and specifications for the types of pollution
prevention measures, erosion control measures, sediment control measures, stabilization and
revegetation practices that are acceptable in the City of Aspen.
2.0 General Requirements
A Construction Stormwater Management Plan (Construction SWMP) must be developed
before a project begins that identifies pollution prevention measures and erosion
prevention and sediment control (EPSC) measures that are appropriate for the actual site
conditions and construction plans for each site— generic plans will not be approved.
The Construction SWMP shall contain a narrative report as well as site plans for each phase of
the project. The appropriate schedule of implementation shall be identified as well as detailed
plans shown on plan sheets with appropriate contours for each phase of the project that will
minimize pollution, erosion, and sediment transport.
The Construction SWMP shall be submitted to the City of Aspen as part of the Construction
Mitigation Plan (CMP) and along with the grading and drainage plans in order to obtain a
building or site grading permit. The site plans, showing contours and BMPs for each phase of
the project, as well as the EPSC measures detail sheets must be included with the civil
drawings in the building plan set submittal. The narrative must be included in the CMP and can
either reference site plans included in the civil set of the building plans or can include a copy of
the site plans as attachments. While not required, it is recommended that the Construction
SWMP is prepared by a registered Colorado Professional Engineer (PE), a registered
Landscape Architect, or a Certified Professional in Erosion and Sediment Control (CPESC).
Plans for grading and erosion control should be considered in the early stages of site planning
and drainage design. The Construction SWMP may have to be modified at the time a final site
development plan is prepared in order to better address the site conditions as the plan changes
during design and review. This modified plan, the final Construction SWMP, must be approved
by the City of Aspen before ground-breaking activities can occur.
Sites that plan to disturb more than one acre of land must obtain a Construction General Permit
(CGP) for the State of Colorado Department of Public Health and Environment (CDPHE). The
requirements of this permit are similar to those of the City of Aspen and the Construction SWMP
prepared for the City of Aspen should provide a starting point for preparation of the Stormwater
2
Pollution Prevention Plan required for the State's CGP. A Notice of Intent application must be
submitted to the State at least 90 days prior to commencing earth-disturbing activities.
Additionally, notice of coverage under the State's CGP will be required before earth-disturbing
activities are allowed in the City. Therefore, the process of submittal for a State CGP should
begin at least one month before it is necessary to begin work.
EPSC measures must be designed according to size, slope, and soil type of disturbed drainage
areas in order to prevent erosion and to capture sediment. Potential sources of pollution that
might affect quality of stormwater discharges from the site, and practices that will be
implemented to prevent that pollution, must be identified and described as part of the
Construction SWMP. In addition, sites discharging directly to waters of the state or the City's
stormwater system might be required to meet stricter requirements as determined by the City
Engineer or City Stormwater Manager.
Implementation of the Construction SWMP (i.e., installation of measures) begins when
construction begins, before the initial clearing, grubbing, and grading operations, since these
activities can usually increase erosion potential on the site. An inspection by the City is
required after installation of initial EPSC measures and before actual ground-breaking or
grading occurs on the site. Implementation and maintenance of pollution prevention
measures and EPSC measures are the responsibility of the permit holder and the
project/property owner. Because site conditions will affect the suitability and effectiveness of
pollution prevention and EPSC measures, the SWMP is a dynamic document that should be
referred to frequently, amended and updated as necessary, and kept on site available for review
by City of Aspen staff upon request. The City reserves the right to require the permit holder
and/or property owner to develop and implement additional measures to prevent and control
pollution as needed.
2.1 Site Planning
Planning for stormwater management before beginning construction can eliminate the need for
unnecessary installation and maintenance of measures, thereby reducing construction costs,
reducing time spent in the field, and reducing impacts to the environment. For example,
effective construction scheduling (phasing and sequencing) helps minimize the duration of
exposed soils. Protection of existing vegetation also minimizes exposed areas AND can reduce
the cost of winter stabilization and final site revegetation.
1. Minimize Disturbed Areas — Construction
activities must be scheduled in correct The Roaring Fork River in Aspen has
sequences to minimize the total amount of been listed on the Clean Water Act
exposed soil at any given time. Section 303d list. Therefore,
a. Only clear land which will be actively
under construction in the near term. construction is more restricted in this
Land not being actively worked must be watershed than in other watersheds
stabilized within 7 days of disturbance. throughout the state.
b. Minimize new land disturbance during the
spring runoff/snow melt season.
c. Avoid clearing or disturbing sensitive areas, such as steep slopes and natural
waterways, where site improvements will not be constructed or are not
necessary.
2. Stabilize Disturbed Areas — Disturbed areas must be permanently or temporarily
stabilized as soon as possible, but no later than 7 days after last worked, whenever
active construction is not occurring on that portion of the site. Disturbed areas must be
3
stabilized by November 151h of each year to minimize erosion and sediment transport
that occurs during spring snow melt.
3. In-Stream Work and Buffers — In-stream work is not considered standard in Aspen and
will not be permitted through this process. In-stream work must speak with the
Engineering Department well in advance to complete a more rigorous review process.
For all other work, a 50-foot buffer must be maintained from all surface water. If this is
infeasible, a sediment control measure may be installed that provides equivalent
protection. For example, if the project needs to work within 30 feet of a surface water
body and only a 20-foot buffer can be maintained, a sediment control measure must be
installed at that location to can provide the same protection as 30 feet of natural stream
buffer.
4. Protect Slopes and Channels — Concentrated stormwater flows shall be avoided or the
conveyance system shall be protected sufficiently to prevent significant erosion.
a. Safely convey runoff from the top of the slope and stabilize disturbed slopes as
quickly as possible.
b. Avoid disturbing natural channels.
c. Ensure the runoff velocity caused by project does not erode channel bottoms.
5. Discharge to Vegetated Areas — Discharge must be directed to vegetated areas unless
not feasible.
2.2 Pollution Prevention/Materials Management
Materials with the potential to contaminate stormwater should be stored and used in ways that
prevent contact with stormwater run-on and runoff. These materials include concrete, sackcrete,
masonry mortar, paint, varnishes, fertilizers, fuels, solvents, lubricants, porta-potties, dust, soil
stockpiles, sawdust, etc.
1. Identify Pollution Sources -The Construction SWMP must identify potential sources of
pollution that may reasonably be expected to affect the quality of stormwater discharging
from the site.
2. Practice Good Housekeeping - The Construction SWMP must describe standard
operating procedures and practices that will be implemented to prevent the release of
pollutants to the stormwater system from construction activities.
a. Perform activities in a manner to keep potential pollutants from coming into
contact with stormwater.
b. Prevent spills and leaks (i.e. hydraulic fluid from leaky vehicles or equipment)
3. Contain Materials and Waste—Areas used for staging of construction activities and the
storage of soil, chemicals, petroleum-based products and waste materials, including
solid and liquid waste, shall be designed to prevent discharge of pollutants in the runoff
from the construction site.
a. Store construction, building, and waste materials in designated areas, protected
from rainfall and contact with stormwater run-on and runoff.
b. Chemicals must be stored under cover and in secondary containment.
c. Dispose of all construction waste in designated areas (e.g. concrete may only be
disposed of in a designated concrete wash-out area), and keep stormwater from
flowing onto or off of these areas.
d. Properly remove and dispose of spilled materials.
4. Dewatering— Dewatering of deep excavations, instream work, or pumped surface
diversions might require a separate State permit and does require methods for properly
discharging the pumped water. Any known or planned for dewatering operations must
be identified early and appropriate plans must be in place.
4
2.3 Erosion Prevention and Sediment Control
It is better to minimize erosion than to rely solely on sedimentation to prevent pollutants from
leaving the construction site. Erosion control BMPs limit the amount and rate of erosion
occurring on disturbed areas. Sediment control BMPs attempt to capture the soil that has been
eroded before it leaves the construction site. Both types of controls are required in Aspen
through the use of a "treatment train" approach.
1. Control Site Perimeter— Construction activities and their impacts must be controlled
within the limits of the site and preferably within the limits of construction. Do not disturb
more of the site than is necessary for construction.
a. Delineate the site perimeter on the plans and in the field to prevent disturbing
areas outside of the project limits.
b. Divert upstream run-on safely around or through the construction project.
Diversions must not cause downstream property damage and cannot be diverted
into another watershed.
c. Construction vehicles and equipment may enter and exit the site at only one
designated access point. This exit must be stabilized with gravel throughout the
duration of the project.
d. All perimeter controls must be installed prior to commencing earth-disturbing
work and must be inspected by the City.
2. Install and Maintain EPSC Measures —All sites must minimize pollution potential by
installing and maintaining erosion prevention and sediment control measures throughout
the duration of any project.
a. Erosion prevention measures are those BMPs used to limit erosion of soil from
disturbed areas on the site. Erosion prevention measures are required for all
disturbed areas.
b. Sediment control measures are those BMPs the limit the transport of sediment
off-site or downstream of disturbed areas. Sediment control measures are
required for all disturbed areas.
c. Use non-structural and structural best management practices (BMPs) described
in this appendix.
d. All EPSC measures must be maintained in effective operating condition. Vehicle
tracking areas must be maintained daily. Sediment must be removed from inlet
protections daily.
3. Retain Sediment— Stormwater must be discharged into vegetated areas before it
leaves the site, if possible. Sediment control measures are required at all points where
stormwater leaves the site as concentrated flow and at any other points where sediment
has the potential to leave the site. Sediment-laden runoff will be considered a
violation of City of Aspen code and can receive fines up to $1000.00 per offense.
2.4 Inspections and Reports
All sites must be inspected regularly by a trained representative from the project to document
the condition and effectiveness of BMPs and to ensure that appropriate maintenance is being
performed.
1. Inspect Vehicle Tracking and Inlet Protection Everyday— Vehicle tracking is a
common problem and requires very regular maintenance. Sediment must be removed
from inlet protection measures everyday if present.
5
•
2. Inspect Site Once Every 7 Days —All EPSC measures on site should be inspected
once per week to ensure that measures are in good working condition and that capacity
levels have not been met. Inspections should also check for signs of erosion, loss of
sediment, effectiveness of existing BMPs, need for additional BMPs, need for
maintenance of BMPs, etc. After earth-disturbing activities are complete and the site
has been seeded and covered and is awaiting vegetative establishment, site inspections
can be reduced to no more than one month increments.
3. Inspect After Storm Events —After rain or snowmelt events that generate stormwater
runoff from the site, measures should be inspected for maintenance needs,
effectiveness, and loss of sediment.
4. Reports - Inspection and maintenance reports should be completed and kept on site
following each inspection and made available to City of Aspen staff upon request. Any
loss of sediment from the site should be noted and kept in file with these reports,
including date and estimated amount of sediment loss and what activities were
performed to ensure that sediment loss would not occur again.
5. Monitoring —The State CGP requires monitoring of discharges from large storm events.
This is not a standard requirement for the City of Aspen, but sites larger than 1 acre
should be prepared to meet this requirement of the State CGP.
2.5 Stabilization and Revegetation
1. Stabilize Disturbed Areas — Disturbed areas must be permanently or temporarily
stabilized as soon as possible, but no later than 7 days after last worked, whenever
active construction is not occurring on that portion of the site.
2. Winter Stabilization — Disturbed areas that will not be worked through the winter must
be stabilized by November 15`h of each year to minimize erosion and sediment transport
that occurs during spring snow melt.
3. Final Stabilization and Revegetation — Final stabilization for obtaining a vegetative
cover should include: landscape plan, seed mix selection and application methods; soil
preparation and amendments; soil stabilization practices (e.g. crimped straw, hydro
mulch, or erosion blankets); and appropriate sediment control BMPs needed until final
stabilization has occurred. Final stabilization is reached when all earth-disturbing
activities are complete and uniform vegetative cover (or other acceptable form of
stabilization) has been established with a plant density of at least 70 percent.
3.0 Permit and Construction Process
Step 1 — Develop Construction SWMP
The owner or the contractor should secure the services of a professional engineer, landscape
architect, or a Certified Professional in Erosion and Sediment Control (CPESC) knowledgeable
in construction management practices, the State CGP, and/or the City of Aspen requirements
for stormwater management during construction to develop the Construction SWMP. The
SWMP must be submitted as a portion of the CMP along with the building permit application.
The Construction SWMP will be reviewed by the City and its comments will need to be
addressed before a building permit will be issued.
Projects that disturb greater than one acre of land will also need to apply for a Construction
General Permit with the CDPHE. This application also requires the submittal of a SWMP. The
Construction SWMP developed for the purposes of construction within the City of Aspen should
be adequate to submit with the Construction General Permit Application.
6
The Construction SWMP shall consist of a written narrative report and a site plan map
describing the erosion prevention and sediment control measures to be implemented at the site.
Narrative Report
The narrative report must contain, or refer to, the drainage report for the site and should contain,
at the minimum, the following:
1. Contact Information —The names, addresses, email addresses and phone numbers of
the project/property owner, the applicant or permit holder, the professional engineer
preparing the Construction SWMP, and the site person that will be responsible for
implementation of the Construction SWMP.
2. Project Description -A brief description of the nature and purpose of the land disturbing
activity, the total area of the site, the area of disturbance involved, and project location.
3. Existing Site Conditions -A description of the existing topography, vegetation, and
drainage; and a description of any water bodies or conveyances on the site.
4. Downstream/Receiving Waters - Identification of the stormwater system downstream of
the site including the receiving water body (e.g. Roaring Fork River).
5. Adiacent Areas -A description of neighboring areas including streams, lakes, residential
areas, roads, etc., which might be affected by the land disturbance. A vegetated buffer
must be maintained between site disturbance and surface waters, if possible.
6. Soils -A brief description of the soils on the site including information on soil type and
character.
7. Historic Conditions —Areas of historic contamination (natural, mining, industrial or
agricultural) should be described.
8. Areas and Volumes -An estimate of the quantity On cubic yards) of excavation and fill
involved, and the surface area (in square feet and acres) of the proposed disturbance.
9. Pollution Prevention Measures—A description of the potential sources of pollution from
construction activities and materials and the methods described in this chapter which will
be used to prevent pollution to the stormwater system.
10. Timing of Construction Activity—A schedule indicating the anticipated starting and
completion time periods of the site grading and/or construction sequence, including the
installation and removal time periods of erosion and sediment control measures, and the
time of exposure of each area prior to the installation of temporary EPSC measures.
11. EPSC Measures -A description of the methods described in this chapter which will be
used to prevent erosion and control sediment on the site. Descriptions must be site
specific. Generic or general statements are not acceptable.
12. Permanent Stabilization - A brief description, including specifications and the
landscaping plan, of how the site will be stabilized after construction is completed.
7
13. Stormwater Management Considerations—A description of how stormwater runoff from
and through the site will be handled during construction. Provide a brief description of
the post-construction stormwater quality control measures to be included as a part of the
site development.
14. Inspection and Maintenance -A description of how each EPSC and pollution prevention
measure will be maintained and a statement that the site will be inspected at least once
every 7 calendar days and after large storm events to determine SWMP accuracy and
effectiveness; proper installation, location, and condition of EPSC measures; and
implementation of construction activity pollution prevention measures.
15. Calculations - Any calculations made for the design of such items as sediment basins,
diversions, or waterways; and calculations for runoff and stormwater detention basin
design (if applicable).
16. Other information or data as may be reasonably required by the City of Aspen.
17. The following note- "This Construction Stormwater Management Plan has been placed
in the City of Aspen file for this project, and appears to fulfill the City of Aspen criteria for
the management of construction activities and associated erosion and sedimentation
controls. I understand that additional control measures may be needed if unforeseen
pollutant transport problems are determined by City of Aspen to occur during this project
or if the submitted plan does not function as intended. The requirements of this plan
shall run with the land and be the obligation of the owner until such time as the project
covered by this plan is properly completed, modified or voided."
18. Signature page for owner/developer acknowledging the review and acceptance of
responsibility and a signature of the site representative that will be responsible for
implementation of the SWMP in the field acknowledging that they have reviewed and
agree to implement and maintain the proposed measures as designed or propose
acceptable alternatives.
Site Plan
A plan sheet(s) size 24"x36" that shows the location of erosion prevention and sediment control
measures with appropriate contours for each phase of the project must be submitted in addition
to the narrative report. These plans must be included in the building permit set of plans with the
civil site design plans. A separate sheet is required for each phase of the project and a sheet
that provides the details/specs specific to the project. The site plan(s) must show:
1. A general location map at a scale of 1-inch to 1,000-feet to 1-inch to 8,000-feet
indicating the general vicinity of the site location.
2. The property lines for the site on which the work will be performed.
3. The construction SWMP at a scale of 1-inch to 20-feet up to 1-inch to 200-feet with
separate sheets for each phase of site development construction.
4. Existing topography at one- or two-foot contour intervals. The map should extend a
minimum of 100-feet beyond the property line or beyond the project's soil disturbance
limits, whichever is larger.
8
5. Proposed topography at one- or two-foot contour intervals. The map should show
elevations, dimensions, location, extent and the slope of all proposed grading, including
building site and driveway grades.
6. Delineation of the entire area draining to the site, drainage areas within the site, and
discharge points from each drainage area.
7. Location of all existing structures and hydrologic features on the site.
8. Location of all structures and natural features on the land adjacent to the site and within
a minimum of 100 feet of the site boundary line.
9. Delineation of trees and natural feature conservation areas such as steep slopes or
natural channels.
10. Location of the storm sewer, street gutter, channel or other waters receiving storm runoff
from the site.
11. Location of all proposed structures including drainage features, paved areas, retaining
walls, cribbing, plantings and development for the site.
12. Limits of clearing and grading.
13. Location of construction entrance/exit. Only one construction exit is allowed per site.
14. Location of soil stockpiles -Areas designated for topsoil and subsoil storage.
15. Location of storage equipment maintenance and temporary disposal areas - Areas
designated for equipment, fuel, lubricants, chemicals and all temporary construction
waste storage. These areas shall be cleaned out and reclaimed at end of project and
waste disposed at legal disposal sites. All chemicals must be stored under cover and
within secondary containment.
16. Location of designated concrete washout. Concrete wash-outs must be lined.
17. Location of temporary roads designated for use during the construction period.
18. Location of temporary and permanent soil erosion control measures and sediment
control measures. Depict all EPSC measures using the standard map symbols given in
Figure 1. If the project will experience several phases of construction, a plan sheet must
be submitted for each phase with the appropriate contours and EPSC measures
depicted on the plan for that phase.
19. Detail drawings and specifications - Design drawings and specifications for erosion and
sediment controls, temporary diversions and all other practices used for each phase of
site development.
20. Other information or data as may be reasonably required by the City.
9
21. The following note: "This Construction Stormwater Management Plan has been placed in
the City of Aspen file for this project and appears to fulfill applicable erosion control and
construction management criteria. I understand that additional measures may be
required of the owner due to unforeseen erosion, sediment or other pollutant transport
off the site or if the submitted plan does not function as intended. The requirements of
this plan shall run with the land and be the obligation of the owner until such time as the
project covered by this plan is properly completed, modified or voided".
19. Signature block for owner/developer acknowledging the review and acceptance of
responsibility, a signed and stamped statement by the Professional Engineer
acknowledging responsibility for the preparation of the SWMP, and a signature of the
site representative that will be responsible for implementation of the SWMP in the field.
Should the field representative change, this block should be updated with a signature of
the current site representative that will be responsible for implementation of the SWMP.
Step 2 —Approval of Construction SWMP
The Construction SWMP must be approved prior to issuance of a Building Permit by the City.
The final SWMP must be consistent with a Drainage Plan and Report accepted by the City of
Aspen Engineering Department. However, approval of the SWMP does not imply acceptance or
approval of drainage plans, utility plans, street or road plans, design of retaining walls or any
other aspect of site development.
Step 3 — Project Construction — Installation, Maintenance, and Inspections
During the construction phase, the following sequence is recommended for the implementation
of the project and the SWMP:
1. During preparation of the Construction SWMP, the contractor should designate a
manager for the implementation of the SWMP. This person will be responsible for
implementing all permit conditions and will communicate with City inspectors and
inspectors from other agencies.
2. Install all BMPs shown on the SWMP that need to be installed in advance of proceeding
with construction, such as construction fencing and limits of disturbance, tree and other
natural area protections, construction exits, silt fences, inlet protection, etc.
3. Identify construction equipment and materials storage and maintenance areas and install
BMPs to prevent pollutant migration from them.
4. Install any additional BMPs that are called for in the SWMP before grading begins
5. Notify the City that the site is ready for initial inspection. Initial inspection must occur
before earth-disturbing activities beyond installation of initial BMPs can occur.
6. Strip off and stockpile topsoil for reuse. Insure that soil stockpile is not located in a
drainage path, downhill of a significant drainage area, is protected from erosion and dust
migration, and that a sediment control measure is located downstream.
10
7. Apply mulch or other stabilization measure to areas that will remain undisturbed
(unworked) for 7 days during the April through September rainstorm season. Any area
that will be unworked through the winter must be stabilized in preparation for spring mud
season.
8. Insure that BMPs that need to be installed at different times during the project are
installed when called for in the SWMP or by the City's inspector and are in full operation
before construction activities begin in areas served by them.
9. All EPSC measures on site should be inspected once per week and after storm events
to ensure that measures are in good working condition and that capacity levels have not
been met. Inspections should also check for signs of erosion, loss of sediment,
effectiveness of existing BMPs, need for additional BMPs, need for maintenance of
BMPs, etc. After earth-disturbing activities are complete and the site has been seeded
and covered and is awaiting vegetative establishment, site inspections can be reduced
to no more than one month increments.
10. The City will inspect each site at least once per month and as often as necessary to
ensure the site is in compliance with the CMP. Sites not in compliance will receive
correction notices, stop work orders, or fines, depending on the impact of the failure to
comply. Sites that have received any form of enforcement will be inspected more
frequently to ensure continued compliance. The City will continue to inspect throughout
winter months. EPSC measures, regardless of snow conditions, should be kept in
effective operating order if their presence is necessary to prevent pollutants from leaving
site.
11. Maintenance of minor repairs must be completed within 24 hours of notice by the City
OR by the site representative or inspector. Documentation of repairs should be kept in
inspection reports. Major repairs and/or new installations of measures must be
completed with 7 days of notice by the City OR by the site representative or inspector.
Maintenance
Step 4— Project Completion —Stabilization, Revegetation, and CO
To prepare the site for Certificate of Occupancy (CO), vegetate, revegetate or stabilize the site
as called for in the CMP and landscaping plan. Clean out and restore any post-construction
BMPs that may have been used for construction sediment controls. When the vegetation has
reached an acceptable maturity and shows uniform coverage of 70% of the site, the owner or
contractor needs to arrange for inspection by the City.
Establishment of vegetation could take months. During this time the owner or contractor need
to inspect the site on a regular basis to determine if there are deficiencies or damage that need
to be addressed. The owner is responsible for the performance of all erosion and sedimentation
control installations until such time the site's revegetation is deemed acceptable and a written
notice is provided to the owner by the City.
11
Attachment C: Citizen Letter Regarding CM P
Changes
Page 7 of 7
Trish Aragon
From: Valerie MacDonald <valerie0701 @hotmail.corn>
Sent: Monday, April 30, 2012 12:21 PM
To: Torre; Derek Johnson; Mick Ireland;Adam Frisch; Steve Skadron; Trish Aragon
Subject: FW: Construction Management Rules in CRA
Attachments: CRA PETITION.pdf
Hello City Council,
My letter may get long winded so I'm going to lead with what it is our neighborhood is
requesting right from the start!
At the May 7th work session we request that our residential zoned
neighborhood be excluded from the Cities Central Resort Area (CRA) so we
are not subject to the same off season construction rules as the commercial
core area.
While the CRA is a good idea in the core area we believe it extends too far into the
residential area. On the west side of town, (which is my neighborhood-corner of
Hyman and Aspen St.) the CRA extends all the way to 1st street. We believe the
Central Resort Area should end at Monarch St. We are far enough from what people
consider the commercial core that to view our residential neighborhood the same as the
Hyman Ave. mall makes no sense to us. We are not commenting on the east end of
town where the CRA extends to Cleveland Ave which seems excessive as well.
24 hours a day for interior construction work and until 7 pm exterior work for about 5
months a year is not acceptable when you are trying to actually live here year
round. We want the construction rules to go back to what they were before this latest
change. 7 am to 5 pm year round.
I talked to my neighbors and asked them to sign the attached petition which
supports our request that our residential neighborhood be taken out of the CRA and
construction rules go back to 7 am to 5 pm year round. I only asked people in the
immediate vicinity of my condo (the corner of Aspen and Hyman). It was clear
immediately that anyone that lives here would sign a petition stating that their
neighbors can't do construction work until 7 pm exterior and 24 hours a day interior, it's
very intuitive. Neighbors felt equally as strong about the interior and exterior stop time
of 5 pm. I'm giving you about 30 signatures, but had I asked 300 people in the
neighborhood they would have signed. A large project on the corner of Garmisch and
Cooper is about to start so the neighborhood is on edge. Yes, it has been relatively
quiet since the recession but do not think that because we have not been complaining
that we are ok with the current rules. As soon as construction starts up again we will
be complaining. We are tying to stay ahead of it.
The date for this work session has changed numerous times and not one person I
spoke to in the neighborhood was aware of it. Public outreach in our neighborhood is
needed from the City. That said, Trish Aragon, the City Engineer, has always been
responsive to my concerns and I appreciate that. I would be at the meeting but this is
the one week I am out of town this offseason. I'm sure that developers and their
lawyers will be there. I have been to some of these meeting in the past and they are
awful. I would bet that very few of the developers and lawyers at the meeting live in
the neighborhood you are discussing and if they did they would feel differently. Please
protect our neighborhood.
On a side note, I want to tell you that I haven't gone door to door to talk to people
since I was a kid selling girl scout cookies. Following are a few observations I had when
I was taking the attached petition around...I was shocked by the number of people in
town during the slowest week of the year (April 23rd), I was surprised to meet
numerous people I had never laid eyes on before maybe just two doors down and I
have lived on this corner for about 15 years, and lastly what a diverse group of people I
meet. I strongly suggest that you start at my condo on the corner of Hyman and Aspen
street and walk west on Hyman to 1st street turn left and walk up Cooper and
repeat west on the next block. There are numerous old condo buildings where
many locals actually live year round in this residential neighborhood. Check out our
neighborhood and please take us out of the CRA.
If you got this far I apologize for this letter being so long!
Thanks for your consideration.
Valerie MacDonald
125 E. Hyman #1
379-6748
Email secured by Check Point
2
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Hotmail Print Message Page 1 of 1
RE: neighborhood petition
From: John Gllsmann (jglismann @sopris.net)
Sent: Wed 4/25/12 11:30 AM
To: 'Valerie MacDonald' (valerle0701 @hotmail.com)
Yes, please add our names.
Original Message
From: Valerie MacDonald [mailto:valerie0701 @hotmail.com]
Sent: Wednesday, April 25, 2012 10:51 AM
To: bud glismann
Subject: neighborhood petition
Hi Bud,
If you and Natasha would like to sign the attached neighborhood petition please reply to this
mail giving us your permission to add your name. We will attach your reply to the petition.
Thanks,
Valrie MacDonald
•
hi-tn•/Icn 1 7 dm writ 1 74 mail liur rnm/mai1/PrinfMeecaOec actIv9rniAC=44cf7r1r14-Rafe-1 1 el-R 4/75/7017
Hotmail Print Message Page 1 of 1
Re: neighborhood petition
From: Jeremy Bernstein (jbernste @earthlink.net)
Sent: Mon 4/23/12 10:16 AM
To: Valerie MacDonald (valerie0701 @hotmail.com)
You have my permission
--Original Message--
From:Valerie MacDonald
To: Jeremy Bernstein
Sent: Monday,April 23, 2012 12:07
Subject: neighborhood petition
Hello Jeremy,
If you would like to sign the attached neighborhood petition would you please reply to this email
giving us permission to add your name. We will attach this email to the petition showing that you
approved it.
Thanks,
Valerie MacDonald
httn•/IcnllAn, entl')d mail live ram/mnil/PrintMeceaaec acnv9rnirle=Qri1067r14-RA5f-1 1 el- 4/75/2017