HomeMy WebLinkAboutSound Level Assessment
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MUELLER PROPERTY SOUTH
LIMESTONE OPERATION
SOUND LEVEL ASSESSMENT
PREPARED FOR
MARTIN MARIETTA MATERIALS, INC.
PREPARED BY
SKELLY AND LOY, INC.
ENGINEERS-CONSULTANTS
SEPTEMBER 2005
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MUELLER PROPERTY SOUTH
LIMESTONE OPERATION
SOUND LEVEL ASSESSMENT
PREPARED FOR
MARTIN MARIETTA MATERIALS, INC.
1980 EAST 116TH STREET, SUITE 200
CARMEL, INDIANA 46032
PREPARED BY
SKELLY AND LOY, INC.
ENGINEERS-CONSULTANTS
2601 NORTH FRONT STREET
HARRISBURG, PENNSYLVANIA 17110
SEPTEMBER 6, 2005
1605456
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TABLE OF CONTENTS
PAGE
1.0 EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
2.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
2.1 GENERAL ENVIRONMENTAL ACOUSTICS PRINCIPLES. . ....... .... 3
2.2 PROJECT DESCRIPTION ...................................... 5
3.0 EXISTING ACOUSTICAL ENVIRONMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6
4.0 SPECIAL USE APPLICATION:
IMPLICATIONS ON THE ACOUSTICAL ENViRONMENT.... . . . ..........12
4.1 METHODOLOGY AND RESULTS ................................ 12
5.0 SUMMARY/CONCLUSION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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NO.
1.1
3.1
4.1
NO.
2.1
3.1
NO.
3.1
LIST OF ORA WINGS
DESCRIPTION
PAGE
MUELLER PROPERTY SOUTH LOCATION MAP.. .... . .. .. . .... ... . . .. 2
MUELLER PROPERTY SOUTH NOISE MONITORING LOCATION MAP..... 7
MUELLER PROPERTY SOUTH/LIMESTONE OPERATION
NOISE CONTOUR MAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
LIST OF FIGURES
DESCRIPTION
PAGE
EXAMPLES OF TYPICAL SOUND LEVELS . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
24-HOUR SOUND DATA .......................................... 11
LIST OF TABLES
DESCRIPTION
PAGE
AMBIENT MEASUREMENT SUMMARY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8
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1.0 EXECUTIVE SUMMARY
Martin Marietta Materials, Inc. (Martin Marietta) has proposed to expand its existing North
Indianapolis limestone mining operations onto an adjacent tract of land to access the known
mineral reserves (referred to as the Mueller Property South). Refer to Drawing 1.1 for a general
Project Location Map. The existing facilities in the region owned by Martin Marietta include the
Carmel Sand Plant and the North Indianapolis Plant, both located in Carmel, Indiana. Skelly and
Loy, Inc. has performed a baseline sound study to determine existing conditions in the area and
to assess the potential for increased sound levels as a result of the proposed expansion. Noise
monitoring was performed at several locations (September 16 and 17,2003, and June 21 through
June 23, 2004) adjacent to the existing Carmel Sand Plant to determine contributions from
operations to the local acoustical environment.
Computer noise modeling was performed to assess the acoustical implications of expanding
limestone extraction onto the Mueller Property South. Reference sound-level emission levels for
mobile extraction machinery currently operating in the existing North Indianapolis Plant were
obtained through field measurements. Several scenarios were computer-modeled to create sound
contours reflecting various future conditions. Noting that the acoustics will change as mining
progresses on the subject property, modeling was performed to simulate several periods in the
future which assumed extraction of 25%, 50%, 75%, and 100% of the reserves for the subject
property. A three-dimensional terrain model considering pit depth, existing and proposed earthen
berms, and proposed contours was used in the modeling to obtain a reasonable estimate of sound
dispersion and attenuation throughout the project area.
The results indicate that no facet of the proposed limestone mining on to Mueller Property
South will create adverse acoustical conditions relative to existing sound levels on adjoining lands.
Extraction elevations coupled with the terrain change and proposed berm construction/placement
substantially attenuate the sound emitted on each property. Therefore, the modeling coupled with
existing noise measurements indicate that the proposed expansion will not adversely affect the
acoustical environment on adjacent lands.
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Source: USGS 7.5' Quadrangle, Fishers, Indiana
Photorevised 1988
OWN BY:
D. Johnston
CK.BY:
M. Williams
Martin Marietta Materials, IneM
Mueller Property South
LOCATION MAP
DATE:
8/30/05
SCALE:
1" = 2000'
DWNG. NO:
1.1
SHEET NO. .
JOB. NO.
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2.0 INTRODUCTION
Martin Marietta has proposed to expand its existing North Indianapolis limestone mining
operation onto an adjacent tract of land to access known mineral reserves (referred to as the
Mueller Property South). A special use application was submitted for surface limestone extraction
on Mueller Property South. The property was also approved for the extraction of sand and gravel,
which would commence prior to limestone extraction. The property is located west of Hazel Dell
Parkway and south of 106th Street. This report documents the results of a sound level study
undertaken to determine the acoustical influence of the proposed expansion on the adjacent land
uses.
2.1 GENERAL ENVIRONMENTAL ACOUSTICS PRINCIPLES
Noise is defined as "unwanted sound." Therefore, it can be considered a psychological
phenomenon and not a physical one. The roar of race cars adds to the excitement of spectators,
and hence would be considered sound. This same roar may annoy nearby neighbors, thereby
becoming noise. Factors playing a role in the perception of sound include magnitude, amplitude,
duration, frequency, source, and receiver. Nevertheless, researchers have established a fair
correlation between the measurement of sound, the A-weighted decibel (dBA), and its associated
perceived human response. Figure 2.1 represents this correlation of qualitative and quantitative
descriptions.
The A-weighted scale refines the sound measurement unit of decibels to match the
response of the human ear. It accounts for the fact that sounds of equal amplitude but different
frequencies are not necessarily perceived to be equally loud. While the human ear can detect
sounds from about 20 Hz to 20,000 Hz, it is more sensitive to frequencies between 500 and 4,000
Hz. To account for this occurrence, the A-weighted scale has been developed to place an
emphasis on those frequencies which are more detectable to the human ear. The A-weighted
scale, which has been in existence for over 40 years, is generally used in community and city noise
ordinances and is expressed in units of dBA (decibels in the A-weighting).
Because sound is actually an energy level, it must be recorded on a logarithmic scale and
expressed in logarithmic units called decibels (dB). Given this scale, a doubling of a noise source
will result in a 3-decibel increase in total level (Le., 50 dBA + 50 dBA = 53 dBA, not 100 dBA).
Typically, a change in sound level between 2 and 3 dBA is barely perceptible, while a change of
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Sound
Source
Air Raid Siren
Jack Hammer
Thunder
Emergency
Sirens
Lawn Mower
Subway
Yelling
Norm a I
Conversation
Rainfall
Refrigerator
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Sound Level
in dBA
Overall Quality
140
130
120- Threshold of Pain
110
100- Very Loud
90
80- -Moderately Loud
70- -Loud
60
50- -Quiet
40
30- 4ery Quiet
20
10
0- _Threshold
of Hearing
OWN BY:
R. Jenson
CK BY:
W. Kaufell
Martin Marietta Materials, IncM
Mueller Property South
Figure 2.1
Examples of Typical
Sound Levels
DATE:
8/30/05
DWNG. NO:
2.1
JOB. NO.
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5 dBA is readily noticeable by most people. A 1 O-dBA increase is usuallyperceived as a doubling
of loudness, and conversely, noise is perceived to be reduced by one-half when a sound level is
reduced by 10 dBA.
Sound is also variable with the passage of time. When sound emission levels change (Le.,
volume increased or decreased) or source/receptor relationships change (Le., vehicle approaches
and passes) over time, sound levels sensed at a given point can vary considerably. To account
for this occurrence, several noise descriptors have been developed. The equivalent level or Leq
is commonly used in community noise studies. The Leq is the constant, steady state sound level
that, over a given period of time, would have the same acoustic energy as the actual varying level.
In a sense, it is the average level, recognizing that the decibel is derived logarithmically. The Leq
is reported for a given period of time, usually one hour, expressed Leq(h).
2.2 PROJECT DESCRIPTION
Martin Marietta Materials has proposed to expand its existing North Indianapolis limestone
mining operation onto an adjacent tract of land to access known mineral reserves (referred to as
the Mueller Property South). The special use application for Mueller Property South involves the
extraction of limestone using surface extraction techniques. The site is located north of the existing
North Indianapolis Plant, south of 106th Street, west of Hazel Dell Parkway in the City of Carmel,
Clay Township, Hamilton County, Indiana (shown on Drawing 1.1). The property is currently
approved for the dry extraction of sand and gravel, resulting in the gradual removal of 5 feet of
overburden and approximately 26 feet of sand and gravel. An earth berm will be constructed
along106th Street in association with the sand and gravel extraction. The limestone extraction will
be a continuation of the North Indianapolis Plant mining activities, eventually progressing onto the
Mueller South Property from south to north. The mining techniques will be identical to the ongoing
Martin Marietta limestone operation, with no aggregate processing on the subject property.
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3.0 EXISTING ACOUSTICAL ENVIRONMENT
The existing acoustical environment surrounding the proposed Mueller Property South
expansion area was assessed using conventional noise monitoring procedures. The intent was
to document current sound levels at adjacent residential areas (Kingswood Subdivision) associated
with the Carmel Sand Plant and other ambient sounds. This subject property is located in Carmel,
Indiana, and is roughly bounded by the Hazel Dell Parkway to the east, East 106th Street to the
north, and Martin Marietta's North Indianapolis Plant to the south (see Drawing 1.1). The data
presented in this section have been submitted previously with other Martin Marietta submissions
(Mueller Property North Sand and Gravel and Mueller Property South Sand and Gravel). Activity
at the Carmel Sand Plant is concentrated on the southern half of the property (the northern half of
the property being previously mined), with primary acoustic contributions coming from the crushing/
screening plant, truck activity, and front-end loaders. Additionally, the North Indianapolis Plant is
located approximately one-half mile south of the Carmel Sand Plant, but is far enough removed
that it does not contribute to the acoustic environment near the Carmel Sand Plant.
Noise measurements were taken at 18 sites on both the existing Carmel Sand Plant
property as well as the southern border of the Kingswood Subdivision. Additionally, five sites were
located in the Kingswood Subdivision interior to determine sound levels in the community.
Drawing 3.1 identifies the specific noise monitoring locations. Noise levels from these monitoring
periods are reported in Table 3.1, Ambient Measurement Summary.
Sites Berm 1 through Berm 14 were taken along the western edge of the Carmel Sand Plant
property line, directly adjacent to the Kingswood Subdivision. Sites Berm 1 through Berm 7 were
located along the top of the existing earthen berm, while sites Berm 8 through Berm 14 were
located behind the earthen berm adjacent to the Kingswood Subdivision property line. This
grouping of sites provides a sample of the overall sound levels from the Carmel Sand Plant at the
residential property line, as well as a measure of the berms' attenuation. Measurements were
primarily collected during plant operations, although Sites Berm 5 and Berm 12 were measured for
a 24-hour duration to obtain nighttime and background noise levels. Comparison of the operating
versus non-operating conditions highlights the contributions of the plant to the ambient sound
levels.
A second set of sites was placed along the southern boundary line of the Kingswood
Subdivision. As with the previously defined "Berm" sites, data were collected during both operating
and non-operating conditions. These sites are designated XP1 through XP4 on Drawing 3.1.
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LEGEND
C:::=:=:=:::J Existing Martin Marietta Mine
Mueller Property Boundary
Municipal Boundary
- - - - - Existing Road
- . . . - . . . - Existing Rivers, Lakes, and Streams
- - - - - Mueller Permit Boundary
-- - - Right Of Way Line
- - - - - Proposed Lim it of Extraction
Proposed 50' Berm Corridor
t3III/~/~ Monitored Sites
~ Sound Levels (dBA) - Plant Operating
I I Proposed Relocation of Blue Woods Creek
NOTE: THE PROPERTY LINE INFORMATION PORTRAYED ON THIS
MAP IS AN APPROXIMATE REPRESENTATION BASED ON DATA
PROVIDED FROM THE HAMILTON COUNTY GIS DEPARTMENT AND
PROPERTY BOUNDARY SURVEYS FOR THE E. & H. MUELLER
DEVELOPMENT L.L.C. PROPERTIES.
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5 II -...... 1 /f/.
I MUELLER I II Mueller Property South
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NOISE MONITORING
LOCATION MAP
DATE:
DWNG. NO:
3.1
JOB. NO.
8/30/05
SCALE:
1" - 600'
SHEET NO. .
1605456
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TABLE 3.1
AMBIENT MEASUREMENT SUMMARY
EXISTING SOUND LEVEL
MEASUREMENT SUMMARY
LOCATION SITEI.D. (Leq [10 MINUTES] IN dBA)
PLANT PLANT NOT
OPERATING OPERATING
Berm 1 54 54-57
Berm 2 57 54-57
Berm 3 57 54-57
Top of berm west of Carmel Berm 4 60 54-57
Sand Plant
Berm 5 61 54-57
Berm 6 63. 54-57
Berm 7 61 54-57
Berm 8 57 54-57
Berm 9 57 54-57
Berm 1 0 55 54-57
Behind berm west of sand and Berm 11 58 54-57
gravel operation
Berm 12 54 54-57
Berm 13 55 54-57
Berm 14 59 54-57
XP1 48 47-50
XP2 47 47-50
Southern Kingswood Boundary XP3 50 47-50
XP4 61* 47-50
BK1 50 47-50
BK2 47 47-50
Kingswood Subdivision BK3 51 47-50
BK4 49 47-50
BK5 50 47-50
Note:
* Site is influenced bv Clav/Carmel Community Recreation Area
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A third set of sites was placed within the Kingswood Subdivision community to document
existing background noise levels. The measurements were taken when the plant was in operation
although generally the plant was inaudible and sound levels were heavily influenced by typical
ambient noises (local traffic, insect noise, lawn mowing etc.).
All of the sites were monitored for a minimum of ten-minute intervals. Relevant monitoring
standards (ANSI Standard S1.13-1995) were adhered to. The noise measurements were taken
at each of the 18 locations with and without the influence of the operation of the Martin Marietta
Materials Carmel Sand Plant. The location of the measurement sites was established to determine
the current effectiveness of the existing earthen berm along the west side of the property, as well
as document the existing sound levels.
All sound levels are reported as Leq in decibels, using the A-weighted (dBA) scale.
Additional information documented during the monitoring period included the identification of major
noise sources and unusual noise events (Le., aircraft fly-bys, dogs barking, insect noise). All
monitoring was performed according to relevant standards using Metrosonics db-3080 sound
analyzers. Calibration of the meters was performed with a Metrosonics cl-304 Calibrator. This
equipment meets all standards of the American National Standard Specification for Sound Level
Meters, ANSI S 1.4-1983 (R 1990).
The "berm" monitoring sites are acoustically affected by contributions from the Carmel Sand
Plant as well as background sounds (insect noise, rustling leaves, community noise, etc.). The
combination of these two sources makes up the overall monitored level of these sites. While the
Carmel Sand Plant influences certain sites on top of the berm, background sounds such as insects
(Le., cicada noise, cricket noise) had a heavy influence for many of the "berm" sites due to the
vegetation. The vegetation on the berm, combined with the season (Summer/Autumn) yielded
insect noise which affected sound readings. Therefore, the noise levels presented in Table 3.1 are
not solely due to the Carmel Sand Plant.
The recorded sound levels at the "Berm" sites clearly indicate that the earthen berm does
provide mitigation ranging from 2 to 9 dBA for plant noise. This is illustrated by comparing "Plant
Operating" conditions for sites on top of the berm (Berm 1 through Berm 7) with sites behind the
berm (Berm 8 through Berm 14). For instance, the operating sound levels for Berm 6 (63 dBA) and
Berm 13 (55 dBA) yield an 8 dBA drop as a result of the berm. For reference, a 10 dBA reduction
is perceived by the human ear as a halving of the sound level. The human ear has difficulty
distinguishing a change in sound level of less than 3 dBA.
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The only area that does not appear to directly benefit from the earthen berm is located to
the northwest of the facility. The sites in this region (Sites Berm 1 ,2,8, and 9) have relatively little
influence from the plant; therefore, there is no reduction associated with the earthen berm. These
sites are the farthest removed from the Carmel Sand Plant and therefore it is expected that the
berm will provide less attenuation in this area.
The sound levels recorded in the Kingswood Subdivision varied significantly depending on
location, monitoring time period, and community activity. While sound readings were taken during
the Camel Sand Plant operations, it was barely perceptible and essentially inaudible at these
locations. Local traffic has a significant affect on the ambient sound levels, particularly in
residential communities such as Kingswood Subdivision. Local sound levels can vary significantly
depending on a neighbor's activities (lawn mowing), school bus traffic, local traffic, animals, insect
noise, etc. The noise levels measured throughout Kingswood Subdivision during the daytime are
typical for a residential subdivision (47 to 50 dBA). In addition, a measurement was repeated at
Site BK3 at 4:00 AM. on September 17, 2003, and yielded 43 dBA.
Noise levels at Sites XP1 through XP4, taken along the southern boundary of the
Kingswood Subdivision resulted in ambient sound levels ranging from 47 to 50 dBA The Carmel
Sand Plant does not influence the acoustics at these sites, and sound levels are primarily a result
of ambient sounds including insect noise, cornfield rustling, etc. Site XP4 (61 dBA) was heavily
influenced by activities at the adjacent Clay/Carmel Recreational Park.
Long-term monitoring locations were also established to determine the evening ambient
sound levels for comparison with future operational noise. The existing ambient conditions were
documented over a 24-hour period from 6:00 P.M. Monday, June 21,2004, through 11 :00 AM.,
Wednesday, June 23, 2004. Sites Berm 5 and Berm 12 were selected for long-term measure-
ments. The data are presented in graphical format on Figure 3.1. The results are typical for a
suburban neighborhood, the sound levels decrease as human activity (traffic, etc.) increases.
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IMPLICATIONS'6~'... THE.ACOUSTI:CAL....ENVIRONI\IIENT
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4.0 SPECIAL USE APPLICATION:
IMPLICATIONS ON THE ACOUSTICAL ENVIRONMENT
The special use application requests use of the property adjacent to the existing Martin
Marietta North Indianapolis Plant operations for the extraction of aggregate. The existing
processing facility at the North Indianapolis Plant will continue to serve as the processing facility
for this expansion area. Therefore, the noise analysis was focused on the extraction techniques
and their associated implications to the acoustical environment. Noting that the acoustics will
change as mining progresses on the property (e.g., highwall progresses northward), future
estimates were made for several scenarios based on the operations' development (25%, 50%,
75%, and 100% extraction).
4.1 METHODOLOGY
The future acoustical environment was assessed using the proposed extraction equipment
sound emissions coupled with existing and proposed terrain features. Future scenarios were
modeled with the Environmental Noise Model v. 3.06 (ENM). The emission rates used in the model
were derived directly from noise measurements obtained for the mobile equipment used to move
aggregate at North Indianapolis Plant. ENM was used to simulate the acoustical environment of
the proposed mining operations for the Mueller Property South.
A three-dimensional topographical model (encompassing approximately one square mile)
was created for importation into ENM. Ground elevations and contours were obtained from base
topographic mapping. Existing topography and proposed terrain features, along with proposed
extraction elevations were incorporated into the model. The noise modeling topography was
compiled for the Mueller Property South for several periods in the future based on the progress of
extraction. For example, the topography (and associated acoustical effects) will change as the
operations progress. The location of highwall will change, as well as the terrain of the pit, altering
the acoustical environment. Estimates were made for the Mueller Property South based on four
scenarios: 25% of property mined, 50% of property mined, 75% of property mined, and full
extraction (100%). While the mobile earth moving equipment will operate at one location at a time,
the modeling assumed that the loaders used to load material onto the conveyors would operate as
a line source, working across the face of the pit over time. This provided a slightly more
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conservative estimate as it assumes that the loaders are operating the entire width of the highwall/
bench, as opposed to individual single locations.
All of the proposed and existing berms were incorporated into the model. The height of
most proposed berms varies from 6 to 10 feet, although the berm located to the north of the
Mueller Property South, parallel to East 106th Street, is considerably higher (approximately 20
feet). Ground zones, representing typical ground cover, were input based on field reconnaissance
and project mapping. Noise sources and their emissions were derived by taking measurements
of equipment at the current site.
ENM is capable of either predicting maximum A-Weighted sound levels at discrete
receptors (single locations) or calculating sound contours given three-dimensional terrain. Due to
the number of extraction scenarios, contour modeling was used to display many of the operating
scenarios. The model generates a network of receivers over the terrain and estimates the
acoustical environment for an entire region. Each scenario was modeled based on four future
conditions (extraction progress: 25% of property mined, 50% of property mined, 75% of property
mined, and 100% extraction). Standard atmospheric conditions were assumed for the modeling
(550F, 65% Relative Humidity, calm winds). The sound level contouring presented in Drawing 4.1
was generated in ENM based on proposed noise sources contained within Mueller Property South.
While this illustration include the major noise sources, local background sources, traffic, wind, and
human activity will also affect the acoustical environment and are not modeled. The lower limit of
the contours was set at 50 dBA, representing the measured background levels (typical for
residential areas). While the contouring indicates that a region is 50 dBA or below, existing
background noise sources not associated with mining in these areas may dominate and locally
elevate sound levels above 50 dBA.
The limestone on the Mueller Property South is proposed to be mined by open pit/surface
mining methods. Total thickness of the limestone material is approximately 215 feet. The bench
elevations, terrain, and extraction equipment were modeled in three dimensions using ENM. The
surface limestone mining proposed for the Mueller Property South will not have an affect on sound
levels outside the property. Drawing 4.1 displays the noise contours for the limestone operation
at various phases of extraction. The ENM contouring indicates that the equipment noise is loud
in the pit, although dissipates quickly (notice tight contour pattern) as a result of the highwall bench
configuration. Much of the activity occurs on the benches and at the bottom of the pit and the
highwall essentially acts as a barrier keeping much of the equipment noise on-site. Based on the
modeling results, the noise drops off quickly due to pit depth/bench configuration and the sound
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Sound Sou nd Level
Source in dBA Overall Quality
Air Raid Siren 140
130
Jack Hammer
120
Thunder
Emergency 110
Sirens
Rock Concert 100
Chain Saw
Lawn Mower
Subway 80
Yelling 70
Normal 60
Conversation
Rainfall 50
40
Refrigerator
30
Whisper
20
10 0
o - -Threshold
of Hearing
*NOTE:
THE SOUND LEVEL CONTOURING WAS GENERA TED IN
ENM BASED ONLY ON PROPOSED NOISE SOURCES
CONTAINED WITHIN THE MUELLER SOUTH PROPERTY
AND THE CARMEL SAND PLANT. WHILE THE
CONTOURING INDICATES THAT A REGION IS 50 dBA
OR BELOW NON-MODELED AMBIENT NOISE SOURCES
(LOCAL TRAFFIC NOISE, INSECTS, WIND, ETC.) MAY
DOMINATE AND LOCALLY ELEVATE SOUND LEVELS
ABOVE 50 dBA.
Legend
r- :::J Existing Martin
L- Marietta Mine
Mueller
Property Boundary
Municipal Boundary
- - - Existing Road
_ . . . _ . . . _ Existing Rivers,
Lakes, and Streams
_ _ _ _ _ Mueller Permit
Boundary
limits of Proposed
Mining Phase
_ _ _ _ _ Proposed limit
of Extraction
.. Proposed Direction
of Mining
Legend
Maximum Sound
Levels In dBA
Color Range
. Greater Than 76
. 74- 76
. 72- 74
. 70- 72
. 68- 70
. 66-68
III 64-66
. 62-64
. 60-62
. 58-60
. 56-58
. 54-56
. 52-54
D 50-52
[] Less Than 50*
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Proposed:
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Proposed:
Berm\
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Proposea
Lim it of
Extractio
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Proposed: Vl
Berm \ Vl ! .
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'-----.1 Pr~pose
Limit of
Ext1ractio
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---
Proposed
Berm \
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25% EXTRACTION
Martin Marietta Materials, IncM
NOTE: THE PROPERTY LINE
INFORMATION PORTRAYED ON
THIS MAP IS AN APPROXIMATE
REPRESENTATION BASED ON
DA TA PROVIDED FROM THE
HAMILTON COUNTY GIS
DEPARTMENT AND PROPERTY
BOUNDARY SURVEYS FOR THE
E. & H. MUELLER
DEVELOPMENT L.L.C.
PROPERTIES.
JOB. NO.
Mueller Property South
)
1'J
."
LIMESTONE NOISE CONTOUR
MAP
1 00% EXTRACTION
OWN BY: DATE:
R. Jenson 8/30/05
, CK BY SCALE:
W. Kaufell 1" - 600' 1605456
Q: 1602227 IBASE_MAP NOISE/seperate south limestone packa~e 6 28 05 SOUTH_LlMESTONE_NOISE_MONITORING_LOCA TION_MAP.DWG
DWNG. NO:
4.1
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levels should not be excessive beyond the property line. This situation is evident upon visiting the
surrounding properties adjacent to the current North Indianapolis Plant highwall.
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5.0 SUMMARY/CONCLUSION
Martin Marietta has proposed to expand its operations onto an adjacent tract of land (known
as the Mueller Property South) in Carmel, Indiana. Skelly and Loy performed a baseline sound
study to determine existing conditions in the area and to assess the potential for increased sound
levels as a result of the proposed expansion. Noise monitoring was performed to determine
contributions from existing operations to the local acoustical environment, and reference data were
gathered from various operations to determine proposed sound-level emissions. Computer noise
modeling was performed using ENM and noise contours were examined for several proposed
operation scenarios. The results indicate that no facet of the proposed expansion will create
adverse acoustical conditions relative to existing sound levels. Based on modeling results, the
noise drops off quickly due to pit depth and bench configuration. Therefore, the proposed
expansion will not adversely affect the acoustical environment outside the property.
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