HomeMy WebLinkAboutFile Documents.754 Moore Dr.0034.2018 (45).ARBK
www.ssccolorado.com 314C Aspen Business Center Aspen, CO 81611 phone 970.925.8360 fax 970.925.5315
Construction Management Plan
Project details:
Address: 754 Moore Drive, Aspen, CO
Owner(s): 12 Five Trees LLC, 222 North Lasalle Street, Chicago, Il 60601
Architect: R+B, 234 E. Hopkins Ave. Aspen, (970) 544-9006
Contractor: Schlumberger|Scherer Construction Contact: Frank Montalbano, frank@ssccolorado.com (970) 445-7266
2.0 Project Location:
2.1 Location Map:
2.2 Disturbance Area:
The area of disturbance is 21,700.
2/27/2018
www.ssccolorado.com 314C Aspen Business Center Aspen, CO 81611 phone 970.925.8360 fax 970.925.5315
2.3 Project description:
The project is the construction of a new 10,551 sq. ft. single family house.
3.0 Project Documentation:
3.1 Permits:
Contractor will maintain all licenses and permits required for the entire length of the project.
3.2 Public Notification:
Contractor will work with HOA to minimize any negative impact on any neighbors. If required contractor will attend any
pre-construction meetings.
3.3 Project Sign:
Contractor will post a visible sign at the entrance to the project with Company name, address and phone number. Also,
job address, permit number, and emergency contact information.
3.4 Contact Designation:
See exhibit #1.
4.0 Project Implementation:
4.1 Dates of Construction:
Scope will take 20-24 months from issue of permit.
4.2 Hours of Construction:
Hours will be 7:00 AM – 7:00 PM M-S or to a more stringent HOA covenant.
4.3 Sequencing of Construction:
See exhibit #2
4.4 Adjoining Properties.
All adjoining properties will be protected from damage resulting from our construction.
4.5 Project Fencing:
Prior to construction perimeter and security fencing shall be implemented as per the Pitkin County requirements. All
work shall be contained within the activity envelope and relative fencing.
4.6 Natural Environment:
No impacts to the natural environment shall occur outside the activity envelope or fenced area other than construction
of driveway and utilities work.
4.7 Wildlife Habitat:
Contractor is cognizant of impacts project may have on wildlife and landscape elements. No dogs are allowed on site.
5.0 Parking Management:
5.1 Emergency Vehicle Access:
Open lanes off the main road, and within the driveway access, shall remain open for the duration of the Project.
5.2 Construction Parking: 2/27/2018
www.ssccolorado.com 314C Aspen Business Center Aspen, CO 81611 phone 970.925.8360 fax 970.925.5315
Construction vehicle parking shall be contained within the driveway and within the activity envelope
to the extent possible. Carpooling will be encouraged. Guidelines from the HOA dictate use of the shoulders of the
roadway and in cull de sac.
5.3 Staging:
Material and equipment shall be contained within the activity envelope, and be ordered and delivered for use and
consumption on an as-needed basis. See exhibit #3.
5.4 Construction Trailer, Materials & Waste Management:
A very small field office shall be maintained on-site and shall maintain a “first point-of-contact” presence. Contact and
permit information shall be visibly posted on the office. Waste and refuse shall be collected daily and placed into
appropriate containers with care to not let wind events disperse onto adjoining properties. No food trash shall be
accessible to any type of wildlife at any time. Recycling bins will be available. See exhibit #3.
6.0 Traffic Control:
6.1 General:
Control will be managed by properly attired personnel, and will be capable of conversing with the public.
6.2 Haul Routes:
See exhibit #4
6.3 Onsite Vehicle Limitations:
Vehicle weights shall comply with PCRM, HOA, and shoring design limitations.
6.4 Delivery Requirements.
All deliveries will be coordinated with the Site Supervisor for compliance to work hours, site access and congestion,
potential traffic impacts, and ability to efficiently and properly offload and stage the materials contained in the
deliveries. All delivery vehicles shall comply with the City & County idling policy and restrictions. Site supervisor will be
on site to manage and coordinate.
6.5 Traffic Control Plan.
A TCP is not required as all staging will be done on site and there will be no road closures.
7.0 Pedestrian Protection:
This project is not located within the public domain.
8.0 Sediment & Erosion Control:
8.1 Requirements:
Disturbance is less than 1 acre so no SWMP will be required. Proper BMP measures shall be instituted directly upon
mobilization to the site and shall be maintained for the duration of the project. Compliance to the Civil Engineer’s
stamped drawings and details shall be strictly enforced.
9.0 Fugitive Dust:
9.1 Fugitive Dust Control Plan:
Excavation spoils shall be staged to the extent possible on-site and either covered or wetted until backfill operations are
complete. Dirt spoils will be transported with covered dump trucks to prevent fugitive dust.
2/27/2018
www.ssccolorado.com 314C Aspen Business Center Aspen, CO 81611 phone 970.925.8360 fax 970.925.5315
10.0 Emissions:
10.1 General:
Emissions from normal and customary vehicles, and earthmoving equipment shall comply with all manufacturers
requirements.
10.2 Emissions from Diesel Powered Engines:
Emissions will not exceed the shade or density limit of 40% except for 10 second starting motion. Corrective measures
will be taken if limits are exceeded.
11.0 Noise Suppression:
11.1 General:
All efforts shall be made and enforced to comply with Pitkin County’s noise reduction standards. Guidelines
contained in Exhibit #5 & Exhibit #6.
12.0 Enforcement:
12.1 Construction Mitigation Officer:
The CMO shall be able to conduct an inspection of the project for compliance to the county regulations and mitigation
efforts defined in this CMP.
12.2 Corrective Action:
Upon any notice of non-compliance, Schlumberger|Scherer shall take corrective action immediately and provide notice
of remedy to the reporting agency.
12.3 Inspection Reports:
Prior to any building inspection in the county it is required to call for a CMP compliance inspection. This inspection
report as well as the full copy of the CMP shall remain on-site for the duration of the project.
2/27/2018
EXHIBIT #1
Contact Designations
754 Moore Drive CMP
2/11/2018
Owners Rep: Seiler Consulting, Gregg or Graham: 312-836-0540
General Contractor: Schlumberger|Scherer Construction: 970-925-8360
Site Supervisor: David Littlefield: 970-379-7187
Project Manager: Frank Montalbano: 970-445-7266
Aspen Pitkin County Community Development: 970-920-5090
Aspen Pitkin County Construction Management Officer, Katheryn Berg: 970-429-2799
Aspen City / Water Department & Sanitation: 970-544-6823
Aspen Police Department: 970-920-5310
Aspen School District: 970-925-3760
Aspen Valley Hospital: 970-925-1120
Aspen Volunteer Fire Department: 970-925-5532
Emergency: 911
Erosion Control Representative, RF Engineering, Jay Engstrom: 970-404-1144
Shoring Engineer, RJ Engineering, Richard Johnson: 970-230-9208
Shoring Contractor, B&Y, Shaun Brainard: 970-625-2608
Excavation Contractor, Excavation services, Justin: 970-948-1106
Holy Cross Electrical: 970-945-5491
Black Hills Energy/Gas: 888-890-5554
RFTA, Roaring Fork Transportation Authority: 970-429-2099
Safety Officer: Glen Montgomery: 970-948-7261
Source Gas LLC: 970-328-1255
Traffic Control Office, Schlumberger|Scherer: 970-925-8360
2/27/2018
ID Task Name Duration Start Finish
1 MAIN RESIDENCE - Project Start Date 525 days Mon 6/18/18 Fri 6/19/20
2
3 Permit Time Lines:84 days Tue 2/20/18 Fri 6/15/18
4 Permit review 12 weeks +/-84 days Tue 2/20/18 Fri 6/15/18
5
6 Mobilization and Site protection 5 days Mon 6/18/18 Fri 6/22/18
7 Excvation 20 days Mon 6/25/18 Fri 7/20/18
8 Clear and grub 5 days Mon 6/25/18 Fri 6/29/18
9 Mass excavation 15 days Mon 7/2/18 Fri 7/20/18
10 Concrete 65 days Mon 7/23/18 Fri 10/19/18
11 Footings 15 days Mon 7/23/18 Fri 8/10/18
12 Walls and columns 50 days Mon 8/13/18 Fri 10/19/18
13 Carpentry 150 days Mon 10/22/18 Fri 5/17/19
14 Framing 80 days Mon 10/22/18 Fri 2/8/19
15 Exterior trim and siding 35 days Mon 2/11/19 Fri 3/29/19
16 Interior trim 35 days Mon 4/1/19 Fri 5/17/19
17 Windows 150 days Thu 3/1/18 Wed 9/26/18
18 Shops and order 60 days Thu 3/1/18 Wed 5/23/18
19 Window delivery 170 days Thu 5/24/18 Wed 1/16/19
20 Windows install 20 days Thu 1/17/19 Wed 2/13/19
21 MEPs, Security, Sprinklers, AV, etc 80 days Mon 5/20/19 Fri 9/6/19
22 Insulation/sheetrock 40 days Mon 9/9/19 Fri 11/1/19
23 FINISHES 100 days Mon 11/4/19 Fri 3/20/20
24 Closeout/Furnishings,etc 20 days Mon 3/23/20 Fri 4/17/20
25 Landscaping 45 days Mon 4/20/20 Fri 6/19/20
Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul
2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter 3rd Quarter
2018 2019 2020
Task
Split
Milestone
Summary
Project Summary
External Tasks
External Milestone
Inactive Milestone
Inactive Summary
Manual Task
Duration-only
Manual Summary Rollup
Manual Summary
Start-only
Finish-only
External Tasks
External Milestone
Progress
Deadline
754 Moore Drive.
Aspen, Colorado
Page 1
Project: Prelim Schedule Ver2 - 02-10Date: Mon 2/19/18
2/27/2018
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SKI TRAIL EASEMENT
20' - 0"
UTIL
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1
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'
-
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UTILITY EASEMENT
10' - 0"
LINE OF ROOF OVERHANG
HOSE BIBB
HOSE
BIBB
GATE
ADDRESS
MARKER
HORN STROBE AND KNOX BOX
MEP EQUIPMENT WELL; GAS
METER AND CHILLERS -RE:
MEP
KEYPAD
PEDESTAL
SHORING WALL FLUSH
WITH GRADE, RE:
SHORING ENGINEER
5'
-
2
"
MIN. 5'-0" WIDE AREA-WAY
ACTIVITY ENVELOPE
PROPOSED BUILDING ENVELOPE
EDGE OF PAVEMENT
PROPERTY LINE
UTILITY EASEMENT
MOORE DRIVE
PROPOSED BUILDING ENVELOPE
PROPOSED BUILDING ENVELOPE
P RO POS ED B UILD ING ENVE L OPE
ACTIVITY ENVELOPE
ED GE OF PAVE M E N T
P R OPE RTY L INE
PROPERTY LINE
SKI TRAIL
EASEMENT LOT 9LOT 12
U T ILI TY EAS E M EN T
ACTIVITY ENVELOPE
LOT 13
LOT 27
LOT 26
LOT 25
FI V E TREE S L ANE
8260
8265 8270 8275
8280 8285
8285
8280
8275
8270
8265
8260
8255
8250
8245
8255
8250
8245
TELECOM
PEDESTAL
ELECTRICAL
TRANSFORMER
WATER VALVE
CATV
PEDESTAL
FIRE HYDRANT
8290
100' = 8261'
CUSTOM SPA WITH
COVER LISTED TO
ASTM F-1346
CUSTOM POOL
WITH COVER LISTED
TO ASTM F-1346
WATER FEATURE
FIRE FEATURE
GUARDRAIL, TYP.
DRIVEWAY
PATIO
GRILL AREA
GUARDRAIL
ACTIVITY ENVELOPE
MEP EQUIPMENT WELL; CT
CABINET, WATER, TELECOM,
AND ELECTRICAL METERS -
RE: MEP
DRYWELL -RE: CIVIL
DRYWELL -RE: CIVIL
ELECTRICAL DISCONNECT
PUSH BUTTON, RE:
ELECTRICAL
IRRIGATION
CONTROLLER -RE:
IRRIGATION
SZ1
1,979.52 SF
SZ2
1,591.91 SF
SZ4
376.22 SF
SZ5
191 SF
SZ3: 242.18 SF
EXISTING
GUARDRAIL
SZ6, 82.47 SF,
LOCATED AT BED 2 DECK
T.O. STONE CAP
103' - 9" (VARIES)
T.O. STONE CAP
95' - 2" (VARIES)
T.O. STONE CAP
104' - 0"
T.O. STONE CAP
100' - 1"T.O. STONE CAP
100' - 1"
T.O. STONE CAP
105' - 0"
T.O. STONE CAP
117' - 6" (VARIES)
T.O. STONE CAP
96' - 8"
T.O. STONE CAP
98' - 6" (VARIES)
T.O. STONE CAP
95' - 8" (VARIES)
T.O. STONE CAP
100' - 0" (VARIES)
T.O. STONE CAP
104' - 2 3/8"
T.O. STONE CAP
106' - 9 5/8" (VARIES)
T.O. STONE CAP
106' - 3" (VARIES)
T.O. STONE CAP
109' - 0" (VARIES)
RETAINING WALL,
RE: STRUCT
RETAINING WALL, RE: STRUCT.
T.O. FINISH
99' - 10 1/2"
T.O. FINISH
100' - 0"
T.O. FINISH
100' - 0"
AUTOCOURT
RETAINING WALL,
RE: STRUCTURAL
RETAINING WALL,
RE: STRUCTURAL
171' - 0 3/4"
25
'
-
4
5
/
8
"
49' - 2 5/8"
16
'
-
1
1
7
/
8
"
SZ7
18 SF
7" CONCRETE SLAB WITH
RADIANT HEAT (RE: CIVIL &
MECHANICAL)
RIGID INSULATION, R-10
MINIMUM
8" COMPACTED BASE
rowland+broughton
architecture / urban design / interior design
234 e. hopkins ave.
aspen, co 81611
970.544.9006 o
970.544.3473 f
1830 blake st. ste. 200
denver, co 80202
303.308.1373 o
303.308.1375 f
Consultants:
Issuances and Revisions:
COPYRIGHT 2018 ROWLAND + BROUGHTON ARCHITECTURE AND URBAN DESIGN
THE INFORMATION AND DESIGN INTENT CONTAINED ON THIS DOCUMENT IS THE PROPERTY OF ROWLAND+BROUGHTON ARCHITECTURE AND URBAN DESIGN. NO PART OF THIS INFORMATION MAY BE USED WITHOUT THE PRIOR WRITTEN PERMISSION OF ROWLAND+BROUGHTON ARCHITECTURE AND URBAN DESIGN.
ROWLAND+BROUGHTON ARCHITECTURE AND URBAN DESIGN SHALL RETAIN ALL
COMMON LAW STATUTORY AND OTHER RESERVED RIGHTS, INCLUDING COPYRIGHT
THERETO.
SCALE:
SHEET TITLE:
PROJECT NO:
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As indicated
A1.1
21523
LOT 12
754 MOORE DRIVE
ASPEN, CO 81611
SITE PLAN
SCALE:
PLAN
NORTH
TRUE
NORTH
A1.1 1/16" = 1'-0"
1 SITE PLAN
GENERAL NOTES:
1. BOTH EXISTING AND PROPOSED BUILDING ENVELOPE AREA SIZES ARE 12,737 SF.
2. REFER TO CIVIL SITE PLAN AND LANDSCAPE PLAN FOR PROPOSED GRADING AND VEGETATION.
3. REFER TO IRRIGATION PLAN FOR PROPOSED IRRIGATION.
4. PER RESOLUTION NO. 09 (SERIES OF 2009) AN ACTIVITY ENVELOPE IS MEASURED TWENTY (20)
FEET FROM THE FOUNDATION OF THE PRINCIPAL AND ACCESSORY STRUCTURES. PERMITTED
ACTIVITIES WITHIN AN ACTIVITY ENVELOPE INCLUDE APPROVED LANDSCAPING, DRAINAGE
FEATURES (INCLUDING DRAINAGE SWALES AND DRYWELLS), GEOTHERMAL WELLS AND
TRENCHING FOR UTILITIES.
5. BUILDING ENVELOPE IS DESIGNATED ON THE FINAL PLAT DRAWINGS. THE CONSTRUCTION OF
BUILDINGS, POOLS, TERRACES AND PATIOS WILL BE PERMITTED ONLY WITHIN THE BUILDING
ENVELOPE. DRIVEWAYS AND RELATED GRADING AND RETAINING WALLS ARE PERMITTED
OUTSIDE OF THE BUILDING ENVELOPE.
08.25.17 DESIGN DEVELOPMENT
SNOWMELT LEGEND
SNOWMELT ZONE 1 1,979.52 SF
SNOWMELT ZONE 2 1,591.91 SF
SNOWMELT ZONE 3 242.18 SF
SNOWMELT ZONE 4 376.22 SF
SNOWMELT ZONE 5 176.74 SF
SNOWMELT ZONE 6 82.47 SF
SNOWMELT ZONE 7 25.78 SF
TOTAL SNOWMELT AREA: 4,474.82 SFSCALE:A1.1 1" = 1'-0"
2 TYPICAL EXTERIOR SNOWMELT DETAIL
Concrete clean
out
Dumpster
Mobile office
Toilets
Parking & staging
phase 2
Parking & staging
phase 1
Exhibit #3 CMP
Recycling
2/27/2018
EXHIBIT #4
2/27/2018
Exhibit #5
Noise Limitations
754 Moore Drive
2/11/2018
6.36.040: USE DISTRICT NOISE LEVELS—MAXIMUM PERMISSIBLE SOUND LEVELS
It shall be a violation of this chapter for any person to operate or permit to be operated any stationary
source of sound in such a manner as to create a ninetieth-percentile sound pressure level (L90) of any
measurement period (which shall not be less than ten (10) minutes unless otherwise provided in this
chapter) which exceeds the limits set forth for the following receiving land use districts when
measured at the property boundary or at any point within the property affected by the noise:
Use District Night Day
7p.m. - 7a.m.
7a.m. - 7p.m.
Residential 50 dB(A) 55 dB(A)
Business 55 dB(A) 65 dB(A)
Industrial 55 dB(A) 65 dB(A)
Construction 70 dB(A) 80 dB(A)
* For restricted days and times in residential zones see Section 6.36.030(B)(5)(b) and (c).
When a noise source can be identified and its noise measured in more than one land use category, the
limits of the most restrictive use shall apply at the boundaries between the different land use
categories. This provision shall not apply when the least restrictive use is a floating construction
district, in which case the limits applicable to the construction district shall apply, notwithstanding
the boundaries of the more restrictive uses, because of the temporary nature of the construction use.
(Ord. 99-38 § 4: Ord. 92-6 § 4) 6.36.050: SOUND LEVEL MEASUREMENT Sound level
measurements shall be made with a sound level meter using the “A” weighing scale, in accordance
with standards promulgated by the American National Standards Istitute or other reasonable
standards tested and adopted by the Aspen/Pitkin environmental health department. (Ord. 99-38 § 5:
Ord. 92-6 § 5)
6.36.060: EXEMPTIONS
The following uses and activities shall be exempt from noise level regulations:
A. Noise of safety signals, warning devices and emergency pressure relief valves, except as provided
for in Section 6.36.030(B)(1);
B. Noise resulting from any authorized emergency vehicle when responding to an emergency call or
acting in time of emergency;
C. Noise resulting from emergency work, as further provided for in Section 6.36.030(B)(5)(d);
D. Noise resulting from activities of a temporary duration for which a permit has been approved by
the director of the Aspen/Pitkin environmental health department in accordance with Section
6.36.070. (Ord. 99-38 § 6: Ord. 92-6 § 6)
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Introduction 0
LOT 12 Soil Stabilization
Noise Modeling Report
Prepared for:
12 FIVE TREES LLC
222 North La Salle, Suite #800
Chicago, Illinois 60601
Prepared by:
Behrens and Associates, Inc.
13806 Inglewood Avenue
Hawthorne, California 90250
Antonio King
Staff Acoustical Engineer
Jason Peetz
Engineering Manager
January 29, 2018
Corporate Office: Hawthorne, California
Carson, California ~ Aledo, Texas ~ Napa California ~ Longmont, Colorado ~ McDonald, Pennsylvania
Phone 800-679-8633 ~ Fax 310-331-1538
www.environmental-noise-control.com ~ www.drillingnoisecontrol.com
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Introduction 1
1. Introduction
The purpose of this study is to provide a noise modeling assessment of the proposed soil stabilization activities
associated with the LOT 12 project located at 754 MOORE DRIVE in Aspen, Colorado. The assessment was
performed to ensure the noise levels generated during the soil stabilization activities are in compliance with the noise
standards described in the City of Aspen Construction Management Plan Requirements (April 2016).
This report provides the results of the predicted unmitigated and mitigated soil stabilization noise levels relative to
the relevant noise standards as well as mitigation recommendations needed to comply with the allowable noise levels.
Figure 1-1 shows the project site within the City of Aspen.
Figure 1-1 Project Site Location
754 Moore Drive
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Noise Fundamentals 2
2. Noise Fundamentals
Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in
air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound
pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per
second or Hertz (Hz). Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to
20,000 Hz. Toward the lower end of this range are low-pitched sounds, including those that might be described as a
“rumble” or “boom”. At the higher end of the range are high-pitched sounds that might be described as a “screech”
or “hiss”.
Environmental noise generally derives, in part, from a combination of distant noise sources. Such sources may include
common experiences such as distant traffic, wind in trees, and distant industrial or farming activities. These distant
sources create a low-level "background noise" in which no particular individual source is identifiable. Background
noise is often relatively constant from moment to moment, but varies slowly from hour to hour as natural forces
change or as human activity follows its daily cycle.
Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of
relatively brief duration. These events may include the passing of single-vehicles, aircraft flyovers, screeching of
brakes, and other short-term events. The presence of these short-term events causes the noise level to fluctuate.
Typical indoor and outdoor A-weighted sound levels are shown in Figure 2-1. Detailed acoustical definitions have
been provided in Appendix A – Glossary of Acoustical Terms.
Figure 2-1 Typical Indoor and Outdoor A-Weighted Sound Levels
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Noise Standards 3
3. Noise Standards
The applicable noise guidelines for the project are contained within the City of Aspen Construction Management
Plan Requirements Manual (April 2016). Chapter 11.3: Noise Limits and Suppression Requirements provides the
following noise limits:
• Projects are limited to 70 decibels (dB) at the property line during the summer on season.
• In addition to the decibel limit listed above, projects located on the Mall will be limited to
70 decibels (dB) at the property line during the winter on season.
• All other times projects will be limited to 80 decibels (80dB) at the property line.
On Season Summer Time Frame: June 1st thru Labor Day
On Season Winter Time Frame: November 15th thru March 31st.
The property is not located on the Mall and the proposed soil stabilization activities are expected to begin during the
On Season Winter Time Frame, therefore, the analysis was conducted to ensure compliance with the 80 dBA
maximum allowable noise level. The A-weighting scale has been interpreted as applicable to the noise limit to better
represent the response to sound of human hearing.
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Soil Stabilization Noise Modeling 4
4. Soil Stabilization Noise Modeling
Noise models representing the proposed soil stabilization activities were constructed with the use of three-
dimensional computer noise modeling software. All models in this report were developed with SoundPLAN 8.0
software using the ISO 9613-2 standard. Noise levels are predicted based on the locations, noise levels and frequency
spectra of the noise sources, and the geometry and reflective properties of the local terrain, buildings and barriers.
SoundPLAN 8.0 software simulates light downwind conditions in all directions to ensure conservative assessments.
The modeling results predicted are dependent on equipment and mitigation orientation as indicated. Actual field
sound level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other
facilities, other human activity, or environmental factors.
4.1 Modeled Soil Stabilization Activities
The proposed soil stabilization activities consist of micropiling. Noise models representing the micropiling activities
were created to predict the noise levels at the site and adjacent surroundings. The micropiling activities were modeled
at one location along the proposed micropiling route for the site as shown in Figure 4-1. The sound power levels for
the micropiling equipment included in the modeling are listed in Table 4-1.
Sound level data utilized in the micropiling models was based on file data of the Furukawa HCR 900 and associated
components. Equipment placement and orientation was coordinated with Seiler Consulting and oriented to minimize
noise impact when possible. The predicted modeling results are dependent on equipment and mitigation orientation
as indicated.
Table 4-1 Modeled Construction Equipment Sound Power Levels
Modeled Equipment Activity Quantity Individual Component
Sound Power Level (dBA)
Furukawa HCR 900 Micropiling 1 113.8
Top Drive Engine Micropiling 1 111.5
Air Compressor Micropiling 1 105.3
The receiver locations where the noise level was evaluated have been chosen to be consistent with the requirements
of The City of Aspen Construction Management Plan. The requirements indicate that noise levels shall comply with
the applicable noise limits as measured at the project property line. The modeled equipment location represents the
closest point from the equipment to the property line, or the loudest point along the property line. The project property
line, modeled receiver locations, and modeled equipment location are shown in Figure 4-1.
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Soil Stabilization Noise Modeling 5
Figure 4-1 Modeled Equipment Location and Property Line Receivers
Property Line
Receiver 4
Receiver 5
Receiver 6
Receiver 1
Receiver 7
Receiver 2 Receiver 3
Receiver 9
Soil Stabilization
Work Area
Modeled
Equipment
Location
Micropiling Route
Receiver 8
2/27/2018
Behrens and Associates, Inc.
Environmental Noise Control
Soil Stabilization Noise Modeling 6
4.2 Unmitigated Noise Modeling Results and Assessment
The results of the unmitigated noise modeling are presented in Table 4-2. The noise assessment locations in the table
correspond to the locations shown in Figure 4-1. The predicted noise levels represent only the contribution of the
proposed construction activities and do not include ambient noise or noise from other facilities. The results of the
unmitigated noise modeling are also shown as a noise contour map. Figure 4-2 shows the Unmitigated Micropiling
Noise Contour Map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating the
sound level of each contour.
Table 4-2 Unmitigated Soil Stabilization Noise Levels
Location Unmitigated Micropiling
(dBA)
Property Line Receiver 1 73.8
Property Line Receiver 2 75.8
Property Line Receiver 3 69.9
Property Line Receiver 4 66.1
Property Line Receiver 5 65.7
Property Line Receiver 6 71.0
Property Line Receiver 7 86.9
Property Line Receiver 8 81.8
Property Line Receiver 9 69.4
Allowable Limit at Property Line 80.0
The results of the unmitigated noise modeling predict that the micropiling noise levels will exceed the allowable City
of Aspen Construction Noise Limits at several locations along the property line. As a result, noise mitigation is
recommended to reduce the noise levels to below the stated limits.
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Soil Stabilization Noise Modeling 7
Figure 4-2 Unmitigated Micropiling Noise Contour Map (dBA)
Property Line Receiver 7
86.9 dBA
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Soil Stabilization Noise Modeling 8
4.3 Noise Mitigation Recommendations
A mitigated noise model was created to include mitigation around the micropiling equipment. Noise levels were
assessed at the project site property line in accordance with City of Aspen noise regulations. Figure 4-3 shows the
Modeled Mitigation Layout. The following mitigation measure is recommended at the construction site to comply
with the 80 dBA noise limit:
• Approximately 112 total linear feet of 12-foot high acoustical barrier panels with a Sound Transmission Class
(STC) rating of at least 25 installed around the micropiling equipment as shown in Figure 4-3.
Additional mitigation recommendations for construction sites are listed below:
1. All equipment should be switched off when not in use.
2. All equipment should be kept in good repair with all worn, loose and unbalanced machine parts to be replaced.
3. Equipment should be placed to maximize the distance between the noisy equipment and the neighboring
houses.
4. Construction operations are limited to the hours of 7:30 am to 5:30 pm Monday through Friday and 9:00 am
to 5:00 pm on Saturday. Construction on Sunday is prohibited.
5. “Residential” grade mufflers should be fitted to the exhaust outlets of all combustion engines.
6. Where possible, broadband white noise reversing alarms should be used in place of tonal reversing alarms
on trucks within the construction site.
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Figure 4-3 Modeled Mitigation Layout
112 ft. of 12-foot-high STC-25
Portable Acoustical Panels
Modeled
Equipment
Location
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4.4 Mitigated Noise Modeling Results and Assessment
The results of the noise modeling with the inclusion of the noise mitigation recommendations are presented in Table
4-3. The noise assessment locations in the table correspond to the locations shown in Figure 4-1. The calculated noise
levels represent only the contribution of the proposed construction activities and do not include ambient noise or
noise from other facilities. The results of the mitigated noise modeling are also shown as a noise contour map. Figure
4-4 shows the Mitigated Micropiling Noise Contour Map in dBA, The noise contours are provided in 5 dB increments
with the color scale indicating the sound level of each contour.
Table 4-3 Mitigated Soil Stabilization Noise Levels
Location Unmitigated Micropiling
(dBA)
Mitigated Micropiling
(dBA)
Property Line Receiver 1 73.8 64.5
Property Line Receiver 2 75.8 62.5
Property Line Receiver 3 69.9 60.2
Property Line Receiver 4 66.1 58.8
Property Line Receiver 5 65.7 58.3
Property Line Receiver 6 71.0 62.1
Property Line Receiver 7 86.9 69.9
Property Line Receiver 8 81.8 67.5
Property Line Receiver 9 69.4 56.2
Allowable Limit at Property Line 80.0
The mitigated noise modeling results predict that with installation of the recommended mitigation measures the
micropiling noise levels will comply with the 80 dBA noise limit established in the City of Aspen Construction
Management Plan Requirements.
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Figure 4-4 Mitigated Micropiling Noise Contour Map (dBA)
Property Line Receiver 7
69.9 dBA
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Conclusion 12
5. Conclusion
Noise models representing the proposed soil stabilization activities at the 754 MOORE DRIVE project site
were created to assess the noise impact against the 80 dBA noise limits established in the City of Aspen
Construction Management Plan Requirements Manual (April 2016). The unmitigated model predicted that
the micropiling activity would generate noise levels in excess of 80 dBA at several locations and would,
therefore, require sound mitigation.
12-foot high portable acoustical panels with an STC rating of at least 25 were added around the micropiling
equipment. The resulting mitigated model demonstrated that with installation of the recommended
mitigation, the proposed soil stabilization activities are predicted to comply with the noise limit of 80 dBA
as established by the City of Aspen Construction Management Plan.
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Glossary of Acoustical Terms 13
Appendix A - Glossary of Acoustical Terms
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Glossary of Acoustical Terms 14
Ambient Noise
The all-encompassing noise associated with a given environment at a specified time, usually a composite of sound
from many sources both near and far.
Average Sound Level
See Equivalent-Continuous Sound Level
A-Weighted Sound Level, dB(A)
The sound level obtained by use of A-weighting. Weighting systems were developed to measure sound ina way that
more closely mimics the ear’s natural sensitivity relative to frequency so that the instrument is less sensitive to noise
at frequencies where the human ear is less sensitive and more sensitive at frequencies where the human ear is more
sensitive.
C-Weighted Sound Level, dBC
The sound level obtained by use of C-weighting. Follows the frequency sensitivity of the human ear at very high
noise levels. The C-weighting scale is quite flat and therefore includes much more of the low-frequency range of
sounds than the A and B scales. In some jurisdictions, C-weighted sound limits are used to limit the low-frequency
content of noise sources.
Community Noise Equivalent Level (CNEL)
A 24-hour A-weighted average sound level which takes into account the fact that a given level of noise may be more
or less tolerable depending on when it occurs. The CNEL measure of noise exposure weights average hourly noise
levels by 5 dB for the evening hours (between 7:00 pm and 10:00 pm), and 10 dB between 10:00 pm and 7:00 am,
then combines the results with the daytime levels to produce the final CNEL value. It is measured in decibels, dB.
Day-Night Average Sound Level (Ldn)
A measure of noise exposure level that is similar to CNEL except that there is no weighting applied to the evening
hours of 7:00 pm to 10:00 pm. It is measured in decibels, dB.
Daytime Average Sound Level
The time-averaged A-weighted sound level measured between the hours of 7:00 am to 7:00 pm. It is measured in
decibels, dB.
Decibel (dB)
The basic unit of measurement for sound level.
Direct Sound
Sound that reaches a given location in a direct line from the source without any reflections.
Divergence
The spreading of sound waves from a source in a free field, resulting in a reduction in sound pressure level with
increasing distance from the source.
Energy Basis
This refers to the procedure of summing or averaging sound pressure levels on the basis of their squared pressures.
This method involves the conversion of decibels to pressures, then performing the necessary arithmetic calculations,
and finally changing the pressure back to decibels.
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Glossary of Acoustical Terms 15
Equivalent-Continuous Sound Level (Leq)
The average sound level measured over a specified time period. It is a single-number measure of time-varying noise
over a specified time period. It is the level of a steady sound that, in a stated time period and at a stated location, has
the same A-Weighted sound energy as the time-varying sound. For example, a person who experiences an Leq of 60
dB(A) for a period of 10 minutes standing next to a busy street is exposed to the same amount of sound energy as if
he had experienced a constant noise level of 60 dB(A) for 10 minutes rather than the time-varying traffic noise level.
Fast Response
A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound level is
always more strongly influenced by recent sounds, and less influenced by sounds occurring in the distant past, than
the corresponding slow sound level. For the same non-steady sound, the maximum fast sound level is generally
greater than the corresponding maximum slow sound level. Fast response is typically used to measure impact sound
levels.
Field Impact Insulation Class (FIIC)
A single number rating similar to the impact insulation class except that the impact sound pressure levels are measured
in the field.
Field Sound Transmission Class (FSTC)
A single number rating similar to sound transmission class except that the transmission loss values used to derive this
class are measured in the field.
Flanking Sound Transmission
The transmission of sound from a room in which a source is located to an adjacent receiving room by paths other
than through the common partition. Also, the diffraction of noise around the ends of a barrier.
Frequency
The number of oscillations per second of a sound wave
Hourly Average Sound Level (HNL)
The equivalent-continuous sound level, Leq, over a 1-hour time period.
Impact Insulation Class (IIC)
A single number rating used to compare the effectiveness of floor/ceiling assemblies in providing reduction of impact-
generated sound such as the sound of a person’s walking across the upstairs floor.
Impact Noise
The noise that results when two objects collide.
Impulse Noise
Noise of a transient nature due to the sudden impulse of pressure like that created by a gunshot or balloon bursting.
Insertion Loss
The decrease in sound power level measured at the location of the receiver when an element (e.g., a noise barrier) is
inserted in the transmission path between the sound source and the receiver.
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Inverse Square Law
A rule by which the sound intensity varies inversely with the square of the distance from the source. This results in a
6dB decrease in sound pressure level for each doubling of distance from the source.
Ln Sound Level
Time-varying noise environments may be expressed in terms of the noise level that is exceeded for a certain
percentage of the total measurement time. These statistical noise levels are denoted Ln, where n is the percent of time.
For example, the L50 is the noise level exceeded for 50% of the time. For a 1-hour measurement period, the L50 would
be the noise level exceeded for a cumulative period of 30 minutes in that hour.
Masking
The process by which the threshold of hearing for one sound is raised by the presence of another sound.
Maximum Sound Level (Lmax)
The greatest sound level measured on a sound level meter during a designated time interval or event.
NC Curves (Noise Criterion Curves)
A system for rating the noisiness of an occupied indoor space. An actual octave-band spectrum is compared with a
set of standard NC curves to determine the NC level of the space.
Noise Reduction
The difference in sound pressure level between any two points.
Noise Reduction Coefficient (NRC)
A single number rating of the sound absorption properties of a material. It is the average of the sound absorption
coefficients at 250, 500, 1000, and 2000 Hz, rounded to the nearest multiple of 0.05.
Octave
The frequency interval between two sounds whose frequency ratio is 2. For example, the frequency interval between
500 Hz and 1,000 Hz is one octave.
Octave-Band Sound Level
For an octave frequency band, the sound pressure level of the sound contained within that band.
One-Third Octave
The frequency interval between two sounds whose frequency ratio is 2^(1/3). For example, the frequency interval
between 200 Hz and 250 Hz is one-third octave.
One-Third-Octave-Band Sound Level
For a one-third-octave frequency band, the sound pressure level of the sound contained within that band.
Outdoor-Indoor Transmission Class (OITC)
A single number rating used to compare the sound insulation properties of building façade elements. This rating is
designed to correlate with subjective impressions of the ability of façade elements to reduce the overall loudness of
ground and air transportation noise.
Peak Sound Level (Lpk)
The maximum instantaneous sound level during a stated time period or event.
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Pink Noise
Noise that has approximately equal intensities at each octave or one-third-octave band.
Point Source
A source that radiates sound as if from a single point.
RC Curves (Room Criterion Curves)
A system for rating the noisiness of an occupied indoor space. An actual octave-band spectrum is compared with a
set of standard RC curves to determine the RC level of the space.
Real-Time Analyzer (RTA)
An instrument for the determination of a sound spectrum.
Receiver
A person (or persons) or equipment which is affected by noise.
Reflected Sound
Sound that persists in an enclosed space as a result of repeated reflections or scattering. It does not include sound that
travels directly from the source without reflections.
Reverberation
The persistence of a sound in an enclosed or partially enclosed space after the source of the sound has stopped, due
to the repeated reflection of the sound waves.
Room Absorption
The total absorption within a room due to all objects, surfaces and air absorption within the room. It is measured in
Sabins or metric Sabins.
Slow Response
A setting on the sound level meter that determines how measured sound levels are averaged over time. A slow sound
level is more influenced by sounds occurring in the distant past that the corresponding fast sound level.
Sound
A physical disturbance in a medium (e.g., air) that is capable of being detected by the human ear.
Sound Absorption Coefficient
A measure of the sound-absorptive property of a material.
Sound Insulation
The capacity of a structure or element to prevent sound from reaching a receiver room either by absorption or
reflection.
Sound Level Meter (SLM)
An instrument used for the measurement of sound level, with a standard frequency-weighting and standard
exponentially weighted time averaging.
Sound Power Level
A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured in decibels.
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Sound Pressure Level
A physical measure of the magnitude of a sound. It is related to the sound’s energy. The terms sound pressure level
and sound level are often used interchangeably.
Sound Transmission Class (STC)
A single number rating used to compare the sound insulation properties of walls, floors, ceilings, windows, or doors.
This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall
loudness of speech, radio, television, and similar noise sources in offices and buildings.
Source Room
A room that contains a noise source or sources
Spectrum
The spectrum of a sound wave is a description of its resolution into components, each of different frequency and
usually different amplitude.
Tapping Machine
A device used in rating different floor constructions against impacts. It produces a series of impacts on the floor under
test, 10 times per second.
Tone
A sound with a distinct pitch
Transmission Loss (TL)
A property of a material or structure describing its ability to reduce the transmission of sound at a particular frequency
from one space to another. The higher the TL value the more effective the material or structure is in reducing sound
between two spaces. It is measured in decibels.
White Noise
Noise that has approximately equal intensities at all frequencies.
Windscreen
A porous covering for a microphone, designed to reduce the noise generated by the passage of wind over the
microphone.
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