HomeMy WebLinkAboutordinance.council.023-07
ORDINANCE NO. 23
Series of 2007
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF ASPEN,
COLORADO, TO AMEND TITLE 8 OF THE ASPEN MUNICIPAL CODE TO
ADD A NEW CHAPTER 8.56, "CONSTRUCTION MANAGEMENT PLAN."
WHEREAS, the City intends to insure the high quality construction within the City of
Aspen.
WHEREAS, the City intends to minilnize impacts of such construction to surrounding
property owners and neighborhoods.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
ASPEN, COLORADO, THAT
Section 1.
Title 8 of the Aspens Municipal Code is hereby amended to add a new Chapter 8.56 entitled
"Construction Management Plan" which Chapter shall read as follows:
CHAPTER 8.56
CONSTRUCTION MANAGEMENT PLAN
Sec.8.56.10 Adoption of Construction Management Plan.
Pursuant to the powers and authority conferred by the Charter of the City of Aspen, there is
hereby adopted and incorporated herein by reference as if fully set forth those regulations
contained in the Construction Management Plan Requirements Manual, as may be amended
from time to time by the City Engineer. At least one (1) copy of the aforementioned Manual
shall be available for public inspection at the City of Aspen Community Development
Department and Engineering Department.
Sec. 8.56.20 Applicability.
This section shall apply to all construction and development activity within the City of
Aspen as per the Construction Management Plan Requirements Manual.
Section 2:
This Ordinance shall not effect any existing litigation and shall not operate as an abatement
of any action or proceeding now pending under or by virtue of the ordinances repealed or
amended as herein provided, and the same shall be construed and concluded under such
prior ordinances.
Section 3:
If any section, subsection, sentence, clause, phrase, or portion of this Ordinance is for any
reason held invalid or unconstitutional in a court of competent jurisdiction, such portion
shall be deemed a separate, distinct and independent provision and shall not affect the
validity ofthe remaining portions thereof.
Section 4: ~
A public hearing on the ordinance shall be held on the...;:;;J- day of ~n
City Council Chambers, Aspen City Hall, Aspen, Colorado.
the
INTRODUCED, READ AND ORDERED PUilfSHED as I}r9vided b~
by the City Council of the City of Aspen on the . day of H ~/s;;?{!.tf ~
L~~~
Attest:
FINALLY, adopted, passed and approved, this~aYOf ~~ ~ ~
Attest:
Approved as to form:
. / (// /U!~.
'John P. Worcester, City Attorney
THE CiTY OF ASPEN
CONSTRUCTION MANAGEMENT PLAN
REQUIREMENTS MANUAL
Construction projects that exceed 1000 SF of soil disturbance and/or 400 SF of building demolition
(interior and/or exterior) must submit a construction management plan in accordance with this manual
at the time of first building permit submittal and must resubmit CMP at time of number one permit.
Prepared by:
Engineering Asset Management Department
130 S. Galena St.
Aspen CO 81611
970.429.5080
JUNE 2007
Please provide copies:
1 - Community Development Department
1 - Engineering Asset Department
1 - Approved CMP on construction site
TABLE OF CONTENTS
1.0 GENERAL
1.1 PURPOSE
1.2 APPLICABILITY
1.3 DEFINITIONS AND TERMS
1.4 REFERENCES
2.0 PROJECT INTRODUCTION
2.1 DISTURBANCE AREA
2.2 LOCATION
2.3 DESCRIPTION
3.0 PROJECT DOCUMENTATION
3.1 PERMITS
3.2 PUBLIC NOTIFICATION
3.3 PROJECT SIGN
3.4 CONTACT DESIGNATION
4.0 PROJECT IMPLEMENATION
4.1 DATES OF CONSTRUCTION
4.2 HOURS OF CONSTRUCTION
4.3 SEQUENCE (PHASING) OF CONSTRUCTION
4.4 ADJOINING PROPERTY OWNERS
4.5 PROJECT FENCING
4.6 PUBLIC HEALTH AND WELFARE
4.7 NATURAL ENVIRONMENT
5.0 PARKING MANAGEMENT
5.1 PARKINGMANGEMENTFORM
5.2 EMERGENCY VEHICLE ACCESS AND ORDINANCE 35
5.3 CONSTRUCTION PARKING DETAILS
5.4 STAGING AREAS
5.5 CONSTRUCTION TRAILER, MATERIALS STORAGE, AND WASTE
MANAGEMENT
6.0 TRAFFIC CONTROL
6.1 GENERAL
6.2 HAUL ROUTES
6.3 ON SITE VEHICLE LIMITATIONS
6.4 DELIVERY REQUIREMENTS
6.5 TRAFFIC CONTROL PLAN
7.0 PEDESTRIAN PROTECTION
7.1 GENERAL
2
8.0 SEDIMENT AND EROSION CONTROL
8.1 REQUIREMENTS
9.0 FUGITIVE DUST CONTROL
9.1 FUGITIVE DUST CONTROL PLAN
9.2 REQUIREMENTS
10.0 EMISSIONS
9.1 GENERAL
9.2 EMISSIONS FROM DIESEL POWERED ENGINES
11.0 NOISE SUPRESSION
11.1 GENERAL
11.2 NOISE SUPPRESSION PLAN
12.0 ENFORCEMENT
12.1 CONSTRUCTION MITIGATION OFFICER
12.2 CORRECTIVE ACTION
12.3 INSPECTION REPORTS
APPENDICES
A - Required Project Sign
B - Parking Management Form
C - Haul Route Map
D - Noise Suppression Plan, Techniques and Equipment
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1.0 GENERAL
1.1 PURPOSE
The purpose of this Construction Management Plan Manual is to provide a consistent
policy under which certain physical aspects of construction management will be
implemented. The elements contained in this document are related to the development
process. It is intended that they apply to both public and private work designated
herein.
These standards cannot anticipate all situations. They are intended to assist, but not to
substitute for competent work by design and construction professionals. The City of
Aspen does not intend to limit any innovative or creative efforts that could result in
better quality, greater cost savings, or both. Any proposed departure from the manual
will be judged on the likelihood that such variance will produce a comparable result,
adequate for the user and City resident over the duration of the improvement/project.
1.2 APPLICABILITY
This manual shall govern the construction and development of all public and private
construction projects in the City of Aspen. These regulations shall apply to all
commercial, industrial, residential, and mixed use developments which disturb 1000 SF
or greater or require demolition of 400 SF or greater (interior and/or exterior) within
any twelve-month period.
1.3 DEFINITIONS AND TERMS
Construction Management Plan - A Construction Management Plan is a combination of
diagrams, documents, drawings, and specifications that clearly define the steps that will
be taken to demonstrate how the impacts to the community will be minimized. How the
impacts associated with any construction project will be managed. Herein described as
"Plan" throughout the rem<\inder of this policy.
Construction Mitigation Officer - An appointed employee of the City of Aspen whose
charge is to ensure that all aspects of a Construction Management Plan are followed,
and to further ensure that the impacts associated with construction activities within the
City of Aspen are effectively managed and impacts associated with those projects are
the least necessary to accomplish the project.
Disturbance Area - A portion of land where topsoil or native soils have been removed
for purposes of construction (development).
Best Management Practices (BMP's) - Schedules of activities, prohibitions of
practices, maintenance procedures, and other management practices to prevent or
reduce the pollution of waters of the state. BMP's also include treatment requirements,
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operating procedures, and practices to control site runoff, spillage or leaks, waste
disposal, or drainage from material storage.
Tree Dripline and Protection Zone - Use the longest branch of the tree as a radius from
the center of the tree and make a circle. The circle is then defined as the dripline and
thus is the tree protection zone.
Final Stabilization - Uniform vegetative cover has been established with a density of at
least 70 percent of pre-disturbed levels.
1.4 REFRENCES
A. City of Aspen Policy 205-A Right-Of-Way Permit Requirements
B. City of Aspen Policy 204-A Revocable Encroachment License Application
C. City of Aspen Construction and Mitigation Standards for Work in the Public
Rights-of-Way
D. City of Aspen Municipal Code Title 35
E. Manual on Uniform Traffic Control Devices for Streets and Highways - 2003
Edition
F. Colorado Department of Public Safety General Permit Part IB
G. Colorado Department of Transportation M&S construction standards
H. Colorado Department of Public Health and Environment - Air Pollution Control
Division
2.0 PROJECT INTRODUCTION
2.1 DISTURBANCE AREA
The Plan shall describe and compute the total project disturbance area. Soil disturbance
shall be kept to a minimum. Construction staging and phasing shall occur, where
applicable, to minimize soil disturbance time.
2.2 LOCATION
A project vicinity map shall be included in the Plan. The map should accurately depict
general project location within the City of Aspen and also delineate project extents.
The map shall be a scaled drawing that includes a directional arrow and adjacent street
descriptions.
2.3 DESCRIPTION
The Plan shall include an overview of the construction project including background
information, proposed development type and general information. The proposed effect
on public utilities such as storm sewer, sanitary sewer, water main, etc. should also be
described.
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3.0 PROJECT DOCUMENTATION
3.1 PERMITS
The contractor shall maintain all applicable local, state and federal licenses and permits
that apply to the construction project. Applicable permits shall be listed, described and
copies of the documents shall be attached in Plan appendices.
3.2 PUBLIC NOTIFICATION
A project update shall be provided to the public on a basis no less than monthly, via
web site, newspaper, on-site notices, or other accepted means of notification (per
request of the City of Aspen). The first public notification shall occur no later than 10
days prior to construction. The update shall include a description of the current project
phase, list any traffic and/or pedestrian concerns, and describe hauling/staging
operations.
The above notification shall specifically be distributed to neighbors located within 300
feet of the project property.
The Plan shall designate a project representative, date, and time for a required
preconstruction meeting. The purpose of the meeting is to discuss the project and
summarize the project specific Construction Management Plan. The contractor and
subcontractors are required to attend the meeting. Utility personnel, applicable City
departments, the Roaring Fork Transit Authority, neighboring property owners, and the
Aspen School District shall also be notified.
3.3 PROJECT SIGN
A project sign shall be constructed and posted that includes the items shown in
Appendix A: Required Construction Sign.
The sign shall be posted in a location where it is readable from the street or driveway
and shall meet criteria in City Code 26.5l0.030B4.
3.4 CONT ACT DESIGNATION
The Plan shall have a contact list with associated phone numbers located at the front of
the document. The list will include: the owner, contractor appointed overall site
supervisor, a certified safety officer, a certified traffic control officer, and a certified
erosion control representative. Other information shall include city and county phone
numbers, fire department, police department, Roaring Fork Transit Authority (RFT A),
school district, and all applicable utility company contact information. The contact list
should include hospital contact information and the Emergency 911 reminder.
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4.0 PROJECT IMPLEMENTATION
4.1 DATES OF CONSTRUCTION
Dates of construction shall be specified in the Plan. Any work being performed within
City ROW shall be completed as per the City of Aspen Right of Way permit
requirements.
4.2 HOURS OF CONSTRUCTION
Construction hours shall be limited to 8am - 6pm Monday through Friday and 9am -
5pm on Saturday. No construction is permitted on Sundays, federally designated
holidays, Christmas week (December 25 - January 1), the three day weekend of Aspen
Food & Wine Festival, Fourth of July and/or Fourth of July weekend when it falls on a
Friday or Monday, and Labor Day weekend.
All activity that generates noise in excess of 80 decibels requires a noise suppression
plan and is restricted to operating between the hours of 9am and 5pm Monday through
Friday.
4.3 SEQUENCE (PHASING) OF CONSTRUCTION
A construction schedule including all project phasing, with item details, and specific
item completion dates is required.
The schedule shall be developed using Microsoft Project or a program of greater
capabilities as approved by the Engineering Department.
4.4 ADJOINING PROPERTIES
No person shall excavate on land close enough to a property line to endanger any
adjacent public street, sidewalk, alley, other public or private property, or easement,
without supporting and protecting the property from any damage that might result from
construction operations.
4.5 PROJECT FENCING
All construction areas shall have a non-removable construction fence or other approved
device securely placed around the areas to be protected. The fence shall be six to eight
feet (6' -8') in height and constructed out of plywood or chain-link fence with mesh
windscreens. Decorative construction fences may be allowed at the discretion of the
City Engineer.
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4.6 PUBLIC HEALTH AND WELFARE
All construction projects located within the City of Aspen shall uphold utmost respect
to public health and welfare and be reflected in prepared Plan.
4.7 NATURAL ENVIRONMENT
Project construction shall be oriented to minimize harm to all aspects of the City of
Aspen's natural environment. All tree and natural resource protection measures must
be identified in the Plan and in place prior to the commencement of any construction or
demolition activities. Refer to section 13.20.020b of the Municipal Code for tree
protection and removal requirements and process.
The Plan must contain a site map showing exact tree protection fence location and
accurate tree driplines (refer to Section 1.3 for Dripline definition).
Proposed projects should be consistent with the character of existing land use in the
surrounding area.
5.0 PARKING MANAGEMENT
5.1 PARKING MANAGEMENT FORM
City of Aspen Parking Management form must be completed (Appendix B). The
parking management form requires submittal of a job site plan that includes:
1. Location of all job site related vehicles, including number and location of
requested street parking spaces and/or vehicle permits.
2. Location for materials storage, construction equipment and any other
staging issues.
3. Emergency access route allowing emergency vehicle access to the
structure( s).
5.2 EMERGENCY VEHICLE ACCESS AND TITLE 35
The contractor shall maintain continuous emergency vehicle access, on and around site,
including but not limited to police, fire, and ambulance services. This includes projects
adjacent to roads and alleys.
All Plans shall include a copy and show compliance with City of Aspen Title 35.
5.3 CONSTRUCTION PARKING DETAILS
Parking locations shall be designated for all craftsman, laborers, subcontractors, and
contractors involved in the site construction process. The City allows minimal onsite
parking with public transportation as the preferred method of transportation.
No construction parking will be permitted within the free two-hour residential parking
areas without a valid permit.
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The contractor shall evaluate the projected transportation needs of the project, including
maximum number of vehicles traveling to the site, per day, per number of days. The
number of vehicles trips must be mitigated by 50%. Mitigation options may include,
but are not limited to carpool, vanpool, public transportation, paid shuttle for
transporting workers to the site, etc.
5.4 STAGING AREAS
The Plan shall specify construction staging area locations. Alleyways are preferred
short term staging locations without blocking access to neighboring properties. The
number of truckloads expected to and from the site should be estimated (including soil
hauling and materials transport). The timing and duration of the transport vehicles
should also be noted.
City of Aspen personnel can limit project staging locations, number of trucks, and
duration of operations depending on project location and site surroundings.
Projects that require crane operations and have little or no setbacks are required to use
electric tower cranes unless City Engineer determines otherwise.
Right -of-Way encroachments are used as a last resort in all cases. In the case where a
ROW encroachment occurs, a permit must be obtained from the Engineering
Department.
5.5 CONSTRUCTION TRAILER, MATERIALS STORAGE, AND WASTE
MANAGEMENT
As specified in Section 5.1, construction trailer, job materials storage, portable
restrooms, waste management and recycling container locations shall be clearly
designated on the project site plan. Loose job material storage is not allowed in ROW
under any circumstance.
The City of Aspen Engineering Asset Management Department strongly recommends
job trailer, waste management containers, and portable restrooms be stored on private
property and not within City ROW.
The City of Aspen requires recycling of construction materials. In instances where
recycling containers cannot be accommodated onsite, the City Engineering Department
will consider locating recycling containers within public ROW where feasible. The
encroachment permit fee will be waived if it pertains to recycling containers. If at any
time such a container is not being used for recycling operations, the property owner will
be responsible to pay at least three months calculated land lease fee.
Per municipal code, any dumpster or other trash receptacle that is used for food refuse
must be constructed in such a manner as to render it bear proof. All containers shall be
adequately covered at all times until transferred to the landfill. The City of Aspen
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municipal code states it shall be unlawful to permit accumulated debris, litter, or trash
on any construction site to blow or scatter onto adjoining properties.
An onsite hazardous material spill cleanup kit is required that contains, at a minimum, a
25 pound bag ofFloor-Dri (or equal), absorbent pads, and other spill kit materials.
6.0 TRAFFIC CONTROL
6.1 GENERAL
All traffic control operations shall be managed by the designated certified traffic
control supervisor.
6.2 HAUL ROUTES
The City of Aspen has designated specific project haul roads throughout the City
(Appendix C). The project must follow the designated routes and specify any
additional routes necessary to complete hauling operations. Project haul routes shall be
oriented to minimize traffic congestion and maximize pedestrian safety.
6.3 ONSITE VEHICLE LIMITATIONS
All construction related vehicle activities shall be defined. Maximum vehicle weights
and sizes shall be specified.
6.4 DELIVERY REQUIREMENTS
Traffic control required for deliveries must be fully coordinated with the City of Aspen
Engineering Department. Roads will not be closed under any circumstances, unless
granted permission from the City of Aspen Engineering Department.
The maximum number of delivery vehicles onsite must be specified, along with the
hours the deliveries will occur, and any exceptions to the delivery schedule.
Delivery and Heavy Duty Vehicles must have a visible sign on the vehicle that
specifies the project contractors name and phone number.
Delivery vehicles and all other onsite vehicles are not allowed to idle for more than five
(5) minutes, with the exception of generators or PTO type operations. The general
contractor must include an idling policy in the Plan that meets City requirements.
6.5 TRAFFIC CONTROL PLAN
A complete Traffic Control Plan (TCP) shall be submitted as part of the Construction
Management Plan. The TCP shall be completed by a Certified Traffic Control
Supervisor and must conform to the most current edition of the Manual of Uniform
Traffic Control Devices for Streets and Highways (MUTCD). The TCP shall contain
all information specified in Section 6C.01 of the MUTCD.
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A School Traffic Control Plan should be submitted in addition to the TCP in school
areas according to Chapter 7 A of the MUTCD. If the project is not located in a school
area, but abuts a school bus stop or school walk route, extra traffic control personnel
and devices shall be implemented to ensure school pedestrian safety.
7.0 PEDESTRIAN PROTECTION
7.1 GENERAL
The Plan shall comply with pedestrian safety per City code 21.04.060, MUTCD
Chapter 6D, the Americans with Disability Act, and City code Chapter 33.
8.0 SEDIMENT AND EROSION CONTROL
8.1 REQUIREMENTS
A Storm Water Pollution Prevention Plan shall be completed along with the CMP,
according to Colorado Department of Public Health and Environment Water Quality
Control Division General Permit Part IB. The main objective of the storm water
management plan shall be to identify Best Management Practices which will minimize
erosion and sediment transport.
In addition to the CDPS (the program) requirements, the following apply:
1. Stock piles must be protected with erosion control devices.
2. Mud tracking ramps (rock construction entrances) are required and
implemented per the most current version of the Colorado Department
of Transportation M&S construction standards.
3. Onsite concrete and tire washout stations are required. Location and
operation procedures shall be described in Plan.
4. City inlets, gutters, swales and irrigation ditches shall be protected
with erosion control devices and such projection maintained for the
duration of the project.
5. A description of procedures used to protect and maintain in good and
effective operating condition the erosion/sediment control measures
until final stabilization is required.
Onsite sediment and erosion control operations shall be managed by a certified erosion
control supervisor.
9.0 FUGITIVE DUST CONTROL
9.1 FUGITIVE DUST CONTROL PLAN
All projects that result in fugitive dust emissions must submit a fugitive dust control
plan and file an application for a construction permit with the Colorado Department of
Public Health and Environment.
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The approval of a Dust Prevention and Control Plan does not relieve the owner or
contractors of the responsibility to implement whatever additional measures may be
required by the City Engineer to properly prevent and control dust.
9.2 REQUIREMENTS
The plan shall demonstrate that the discharge of dust from the construction site will not
occur, or can be controlled to an acceptable level depending on the particular site
conditions and circumstances.
I. The plan shall address site conditions during construction operations,
after normal working hours, and during various phases of construction.
2. The plan shall include the name and the 24 hour phone number of a
responsible party in case of emergency.
3. If the importing or exporting of dirt is necessary, the plan shall also
include the procedures necessary to keep the public streets and private
properties along the haul route free of dirt, dust, and other debris.
4. When an entire project is to be graded and the subsequent construction
on the site is to be completed in phases, the portion of the site not
under construction shall be treated with dust preventive substance or
plant materials and an irrigation system.
5. All phased projects shall submit a plan demonstrating that dust will not
be generated from future phase areas.
For all construction within the site, the contractor shall have a water truck available for
dust control. Wetting shall be completed once three times a day under dry conditions
or as directed by the City Construction Mitigation Officer.
Vehicle speeds should not exceed 15 mph on construction access roads and
construction site.
10.0 EMISSIONS
10.1 GENERAL
All vehicles and equipment used on site will be properly maintained such that the
engines will function within manufacture's standards or parameters.
10.2 EMISSIONS FROM DIESEL POWERED ENGINES
Emissions from diesel engines operated within the City of Aspen shall be of a shade or
density no darker than 40% opacity, except for starting motion no longer than 10
seconds or for stationary operation not exceeding 10 seconds.
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11.0 NOISE SUPRESSION
11.1 GENERAL
The noise limit for construction is 80 decibels measured at the property line of the
construction site. All construction equipment shall be adequately muffled and
maintained to minimize project noise. The installation of plywood and matting around
the project site is the minimum technique to suppress noise, especially when jack
hammering of concrete occurs.
11.2 NOISE SUPPRESSION PLAN
All activity that generates noise in excess of 80 decibels requires a noise suppression
plan and is restricted to operating between the hours of 9am and 5pm Monday through
Friday. See Appendix D for plan document which include information on noise
blocking methods, techniques, and common equipment and activities that require noise
suppressIOn.
12.0 ENFORCEMENT
12.1 CITY CONSTRUCTION MITIGATION OFFICER
A City Construction Mitigation Officer shall be assigned to each construction project.
The City Construction Mitigation Officer will complete random site visits to determine
if the project is following approved Plan and City requirements. The officer is not
intended to take the place of a City of Aspen building inspector.
12.2 CORRECTIVE ACTION
The City of Aspen will enforce construction mitigation corrections as follows (per site
per issue):
1.
3.
The first corrective action is a verbal warning and explanation of
the violation with a timeframe for completion.
The second corrective action is a written warning or correction
notice with time frame for compliance.
Third and final notice is a "Stop Work Order" (red tag). Ifa stop
work order is issued, no more work can be completed upon the
premises (the entire project) until the violation is corrected.
Failure to correct the violations will subject the owner, contractor
or both to a fine of $5000 a day starting 12 hours after the "Stop
Work Order" until the violation is corrected.
2.
4.
11.2 INSPECTION REPORTS
The Construction Mitigation Officer will complete construction inspection reports. All
reports are public and will be kept in the City Engineering Asset Management
Department.
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APPENDIX A
PROJECT
NAME
BUILDING PERMIT #
General Contractor Name
General Contractor
Contact
Contact Phone#
Emergency Phone#
24 Hour Emergency Contact # (if different)
~
APPENDIX B
CITY OF ASPEN CONSTRUCTION STAGING AREA, PARKING AND EMERGENCY VEHICLE
ACCESS MANAGEMENT PLAN
THE CITY OF ASPEN
rhe City of Aspen requires submission of a job site plan describing the job location, construction staging area(s), number
of construction related vehicles and plans to allow and ensure proper emergency vehicle access. The construction project
may be issued vehicle parking permits and/or use of specific parking areas for the expected duration of the project for a fee.
These plans are required for all construction and remodeling projects.
PLEASE PRINT LEGIBLY
Construction Site Address:
Contractor:
Primary Contact:
Secondary Contact:
Phone Number:
Phone Number:
Provide one copy of a job slle plan showing the following information:
1. Location for all job site related vehicles, including number and location of requested street parking spaces and/or
vehicle parking permits.
2. Location for materials storage, construction equipment and lor any other staging issues.
3. Emergency access route allowing emergency vehicle access to the structure(s)
REQUESTED (as indicated on job site plan)
#of Vehicle Permits #of Street Parking Spaces
Other Parking Area(s)
Begin Date:
Completion Date:
All construction staging and construction parking shall be confined to the areas defined in an approved plan for the
job site. Workers shall be encouraged to carpool. Emergency access, as described in the approved plan for the job
site, shall at no time be blocked.
ATTENTION
Construction related vehicles are excluded from the signed 2-Hour Free Parking areas in Aspen's residential
parking zones. Construction related vehicles will only be considered in compliance if parked in the leased
construction parking spaces/area(s) or displaying a valid street permit. All other vehicles will be considered in
violation.
FOR OFFICE USE ONLY
Paid D
Vehicle permits
x Rate
x Days
~ Fee
Exp. Date
Street Spaces
x Rate
x Days
~Fee
Exp. Date
Notes:
Approved
Date
Please call (970) 920-5267 with questions regarding this form.
15
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APPENDIX D
City of Aspen
Construction Noise Suppression Plan
As the General Contractor for this construction project, I hereby agree
to the following restrictions and will provide the necessary noise suppression (outlined below),
such that it will lesson the impact to the properties within 300 feet of the project located at
. I understand that if any construction activities exceed
80 decibels and are not covered by this document I will contact the City of Aspen Environmental
Health Department to design a specific noise suppression plan for those activities.
Signature
Print name
On-site Contact Phone #
Many activities on construction sites are noisy. Although some noise may be unavoidable, it can
often be controlled using improved work practices. Builders should make all reasonable efforts
to minimize noise. Noise Suppression plans are required for all construction proiects where
activities will generate noise that exceeds 80 decibels. Section 18.04.050(A)(2)(d)
Hours of operation
All construction activity is limited to the following days and times:
Monday thru Saturday
8:00 am to 6:00 pm
Sunday
No construction work is allowed
Constructions activities producing noise greater than 80 decibels are limited to the following
days and times:
Monday thru Friday
9:00 am to 5:00 pm
Work that is over 80 decibels which by law requires a noise suppression plan will not be allowed
for Saturdav work that includes but not limited to the use of compressors, generators,
jackhammers, power equipment, nail guns, drilling machinery, earth moving equipment and
similar loud construction activities. This does not restrict Quiet work inside and outside that does
not require a power source. includinQ a battery, on Saturdav.
Construction activity is not allowed during all federal holidays.
Due to the congestion in Aspen when town is completely full, noise suppression plans will not
be approved for the following dates: Christmas Week (December 25 through Jan. 1), Food
and Wine Week in June (Friday thru Sunday), 4th of July day and/or weekend if it falls on
a Friday or Monday, and Labor Day weekend.
Specific noise suppression requirements for all activities exceeding
80 decibels at a construction site include:
1. Notify neighbors within three hundred (300) feet of the project informing them of the
kinds of equipment, expected noise levels and durations of loud work. Including the
variation of noise levels during a typical construction days may be helpful. Such
notification must be in writing and be done seven (7) days prior to the starting time of
the project. Communication with neighbors can prevent complaints from arising, and
resolve concerns before there is a problem. Provide a phone number where the
foreman can be reached prior to the start of the job.
2. Operate equipment in accordance with manufacturer's specifications and with all
standard manufacturers' mufflers and noise-reducing equipment in use and in
properly operating condition.
3.. Post notices to inform workers, including sub-contractors, about the basic noise
requirements, as well as specific noise restrictions, to the project.
4. Install noise barriers around all equipment/activities specified in
Table 1: TYPICAL CONSTRUCTION EQUIPMENT REQUIRING NOISE
SUPPRESSION. Noise barriers not only significantly reduce construction noise, but
they also provide an extra benefit of "hiding" the noise producing sources, thus
increasing a neighbor's tolerance. (See also the attached list of noise blocking
methods for details on approved noise barriers.)
5. Move portable loud equipment including generators, compressors, and cement
mixers to different sides of the property to reduce impacts on individual neighbors.
What can you do about construction noise?
. The use of radios on the site before 8:00 am are not allowed: remind laborers and sub-
contractors.
. Noise suppression plans will not allow noisy machines such as brick cutters or
jackhammers to be operated before 9.00 am.
. Noisy equipment such as cement mixers should be placed on the site to maximize the
distance from neighboring houses and/or rotate location so as to not impact just one
neighbor. Noise levels drop quickly with distance from the source.
. All equipment should be properly maintained, with special attention to mufflers and other
noise control devices.
. Between work periods, builders are required by city ordinance to shut down machines
such as backhoes, bobcats, loaders and generators.
. When dropping materials from a height-for example, into or out of a truck, or when
loading or unloading scaffolding, noise suppression plans require a chute or side baffles.
. All vehicular movements to and from the site must only be made during the scheduled
normal working hours. This includes off-site noise that is associated with a specific
project such as staging of concrete trucks.
TABLE 1: NOISE CONSTRUCTION EQUIPMENT REQUIRING NOISE
SUPPRESSION PLANS
Equipment Category I
Auger Drill Rig I
Backhoe I
Chain Saw I
Clam Shovel I
Compressor (air) I
Concrete Mixer I
Concrete Pump
Concrete Saw
I Crane (mobile or stationary)
I Dozer
I Drill Rig
I Excavator
I Front End Loader
I Generator (more than 25 KV A)
Gradall
Grader
Horizontal Hydraulic Boring Jack
Impact Pile Driver (diesel or drop)
Impact Wrench
Jackhammer*
Mounted Impact Hammer (hoe ram)
Paver I
Pneumatic Tools
Rock Drill
Scraper
Scarifier
Slurry Machine
Vibratory Pile Driver
Noise Blocking Methods
Contractors shall require all subcontractors and vendors to use:
. Quieter vs. Louder equipment
. "Residential" grade combustion engine exhaust silencers
. Electrical vs. pneumatic hand power tools: All pneumatic tools operated in the City of
Aspen must be fitted with an effective silencer on their air exhaust port.
. Hydraulic vs. air powered rock drills
. "Silenced" pile drivers vs. Diesel pile drivers
In general, noise reduction equipment and materials may include, but not be limited to:
1. Shields, shrouds, or intake and exhaust mufflers.
2. Noise-deadening material to line hoppers, conveyor transfer points, storage bins,
or chutes.
3. Noise barriers using materials consistent with the Temporary Noise Barrier
Materials Section.
4. Noise curtains
5. Plywood with concrete blankets at the height of the equipment and that it
surrounds the activity such that it directs noise up more than out from the
property.
6. Portable three sided enclosures made out of plywood to move with the activity
such as jack hammering.
7. Internal combustion engines are to be fitted with a suitable muffler in good repair.
Specific Equipment:
Generators: The local power grid shall be used wherever feasible to limit generator noise. No
generators larger than 25 KV A shall be used and, where a generator is necessary, it
shall have maximum noise muffling capability.
Backup Alarms: All equipment with backup alarms operated by the Contractor, vendors,
suppliers, and subcontractors on the construction site shall be equipped with
either audible self-adjusting ambient-sensitive backup alarms or manually-
adjustable alarms. The ambient-sensitive alarms shall automatically adjust to a
maximum of 5 dBA over the surrounding background noise levels. The
manually-adjustable alarms shall be set at the lowest setting required to be
audible above the surrounding noise. Installation and use of the alarms shall be
consistent with the performance requirements of the current revisions of Society
of Automotive Engineering (SAE) J994, Jl446, and OSHA regulations.
Compressors: The unit with the lowest noise rating which meets the requirements of the job
should be used where work is conducted in the City of Aspen, installed with
mufflers and/or enclosed in a noise barrier.
Jackhammer: All jackhammers and pavement breakers used on the construction site shall have
exhaust systems and mufflers that have been recommended by the manufacturer
as having the lowest associated noise and shall be enclosed with shields or
acoustical barrier enclosures.
Concrete crushers or pavement saws: Pre-augur pile holes to reduce the duration of impact or
vibratory pile driving and tie to local power grid to
reduce the use of generators and shall be enclosed with
shields or acoustical barrier enclosures.
Pneumatic hand power tools: All pneumatic tools operated in the City of Aspen must be fitted
with an effective silencer on their air exhaust port.
Temporary Noise Barrier Materials:
Temporary barriers shall be constructed of 3/4-inch Medium Density Overlay (MDO) plywood
sheeting, or other material of equivalent utility and appearance having a surface weight of 2
pounds per square foot or greater. The temporary barriers shall be lined on one side with glass
fiber, mineral wool, or other similar noise curtain type noise-absorbing material at least 2-inches.
The materials used for temporary barriers shall be sufficient to last through the duration of the
construction project, and shall be maintained in good repair. Prefabricated acoustic barriers are
available from various vendors. An equivalent barrier design can be submitted in lieu of the
plywood barrier described above.
Impact Equipment:
Impact noise is noise produced from impact or devices with discernible separation in sound
pressure maxima. Examples for impact equipment include, but are not limited to; blasting, chisel
drops, mounted impact hammers (hoe ram), and impact pile drivers.
Impact equipment is the loudest and most intrusive to the neighboring property. The City of
Aspen requires that this type activity have the strictest mitigation requirements and
requires a customized noise suppression plan specific to the site. General contractors must
contact the City of Aspen Environmental Health Department for an application at 970-920-5039.
Noise Control
. Replace worn, loose, or unbalanced machine parts that cause vibration.
. Keep machine parts well lubricated to reduce friction.
. Acoustical enclosures and barriers around generators
. Sound absorbing material and vibration isolation systems on hand tools
. Quiet work practices - use rubber mallets to erect and dismantle formwork.
Noise Controls for Construction Equipment (Schneider et aI., 1995)
..=1
i
.1
I
I
I
1
.1
I
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I
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1
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--1
--I
!Eqnipment ~oise Controls
iPile Driver !Enclosure, muffle~. ---~.
~~ --- _ '--'-'-'-- --- -.-..-.....-
iStone saw cutting :Noise control pad with water
r:-;-.-.-.-...---.-rn. .............--..-
iHandheld impact drills fl'.eduction of reflected sound
ICircular saw blades 1150 tooth angle, new tooth configuration, slotted saw blades,
i !viscoelastic damping
\pneumatic tools !Muffler
\pa~~m~~tbreake~i Rock ~uffler,enclos~r~.of cyiinde~case an<Cfront head, ~oil da~ping- -..
Idrill 1
iPortable air co~p~~ssor IMuffler, acoust;.c enclosures
[B~lldo~e~.n !B~ijdoze~Cab=liner~aterial, enclosure, sound absorption in canopy~
!sealing of all openings
IAbsorption of sound cooling air ro~te
!Flexible mounting for pu~pcompartment
!Anti-vibration mounting fixtures
[Wheeled loader
~ibratory roller
Joint Cutter
I