silverado village project - home - city of elk grove

Environmental Noise Assessment

Silverado Village Project Elk Grove, California

BAC Job # 2011-053

Prepared For:

Vintara Holdings, LLC

Attn: Mr. Paul Eblen 140 Diamond Creek Place Roseville, CA 95747

Prepared By:

Bollard Acoustical Consultants, Inc.

Paul Bollard, President

April 9, 2013

3551 Bankhead Road < Loomis, CA 95650 < Phone: (916) 663-0500 < Fax: (916) 663-0501 < BACNOISE.COM

Bollard Acoustical Consultants, Inc. (BAC)

Environmental Noise Analysis Silverado Village – Elk Grove (Sacramento County)

Page 1

Introduction This Noise Study Report was prepared for the proposed Silverado Village project in the City of Elk Grove, California. The proposed project consists of the creation of 660 single-family residential lots on 115.4 acres, an age restricted multi-family lodge and Village Center on 4.6 acres, 79.4 acres of open space and nature preservation area, 5.8 acres of parks, 3.4 acres of landscape entry/corridors, a detention area of 15.7 acres and 5.7 acres of major roads. Figure 1 shows the project area and Figure 2 shows the project site plan. Bollard Acoustical Consultants, Inc. was retained by the project applicant to prepare this analysis of potential noise impacts and to provide mitigation measures where appropriate. The following specific noise sources are evaluated in this assessment:

• Bond and Waterman Road traffic noise. • Increases in off-site traffic noise resulting from the project. • Potential noise generated by future commercial uses located at the southeast quadrant

of the project site. • Project construction noise. • Noise generated at the proposed park sites. • Cumulative noise conditions

Fundamentals of Noise Noise is often defined simply as unwanted sound, and thus is a subjective reaction to characteristics of a physical phenomenon. Researchers have generally agreed that A-weighted sound pressure levels (sound levels) are very well correlated with community reaction to noise. The unit of sound level measurement is the decibel (dB), sometimes expressed as dBA. Variations in sound levels over time are represented by statistical descriptors, and by time-weighted composite noise metrics such as the Day-Night Average Level (Ldn), or the Community Noise Equivalent Level (CNEL). Throughout this analysis, A-weighted sound pressure levels will be used to describe community noise unless otherwise indicated. The decibel notation used for sound levels describes a logarithmic relationship of acoustical energy, so that sound levels cannot be added or subtracted in the conventional arithmetic manner. For example, a doubling of acoustical energy results in a change of 3 decibels (dBA), which is usually considered to be barely perceptible. A 10-fold increase in acoustical energy yields a 10 decibel change, which is subjectively like a doubling of loudness. Appendix A provides definitions of acoustical terms used in this report.



Page 2



Page 4

Noise Exposure Criteria

City of Elk Grove The City of Elk Grove Noise Element of the General Plan establishes acceptable noise level limits for transportation (such as traffic), and non-transportation noise sources. Table 1 contains the City’s noise standards applicable to transportation sources and Table 2 contains the City’s noise standards applicable to non-transportation noise sources.

Table 1 Maximum Allowable Noise Exposure

Transportation Noise Sources

Land Use Outdoor Activity Areas1

Ldn/CNEL, dB

Interior Spaces Ldn/CNEL,

dB Leq, dB

Residential 60 2 45 --

Residential subject to noise from railroad tracks, aircraft overflights, or similar noise sources which produce clearly identifiable, discrete noise events (the passing of a single train, as opposed to relatively steady noise sources such as roadways)

60 2 403 --

Playgrounds, Neighborhood Parks 70 -- --

1Where the location of outdoor activity areas is unknown, the exterior noise level standard shall be applied to the property line of

the receiving land use.

Where it is not practical to mitigate exterior noise levels at patio or balconies of apartment complexes, a common area such as a

pool or recreation area may be designated as the outdoor activity area. 2Where it is not possible to reduce noise in outdoor activity areas to 60 dB Ldn/CNEL or less using a practical application of the

best available noise reduction measures, an exterior noise level of up to 65 dB Ldn/CNEL may be allowed provided that

available exterior noise level reduction measures have been implemented and interior noise levels are in compliance with this

table. 3The intent of this noise standard is to provide increased protection against sleep disturbance for residences located near

railroad tracks.



Page 5

Table 2 Performance Standards for Typical Stationary Noise Sources

Noise Level Descriptor Daytime (7 am – 10 pm) Nighttime (10 pm – 7 am)

Hourly Leq, dB 55 45

The standards above will apply generally to noise sources that are not tonal, impulsive, or repetitive in nature. Typical noise sources in this category would include HVAC systems, cooling towers, fans, blowers, etc. Where the noise source in question is tonal, impulsive or repetitive in nature, or which consists primarily of speech or music, the noise standards shown in Table 2 are reduced by 5 dB.

Criteria for Assessing Project-Related Traffic Noise Increases The following table was developed by the Federal Interagency Committee on Noise (FICON) as a means of developing thresholds for identifying project-related noise level increases. The rationale for the graduated scales is that test subject’s reactions to increases in noise levels varied depending on the starting level of noise. Specifically, with lower ambient noise environments, such as those below 60 dB Ldn, a larger increase in noise levels was required to achieve a negative reaction than was necessary in environments where noise levels were already elevated. Therefore, because the County does not have defined thresholds for what would be considered a substantial increase in noise levels, information from Table 3 is used.

Table 3 Significance of Changes in Cumulative Noise Exposure

Ambient Noise Level Without Project, Ldn Increase Required for Significant Impact <60 dB +5.0 dB or more

60-65 dB +3.0 dB or more

>65 dB +1.5 dB or more

Source: Federal Interagency Committee on Noise (FICON).

Traffic Noise Evaluation

Traffic Noise Prediction Methodology To describe projected noise levels due to traffic, Bollard Acoustical Consultants, Inc. employs the Federal Highway Administration (FHWA) Highway Traffic Noise Prediction Model (FHWA RD-77-108). The model is based upon the Calveno reference noise factors for automobiles, medium trucks and heavy trucks, with consideration given to vehicle volume, speed, roadway configuration, distance to the receiver, and the acoustical characteristics of the site.



Page 6

Traffic Noise Prediction Model Calibration for Bond and Waterman Roads On August 18, 2011, Bollard Acoustical Consultants, Inc. conducted noise level measurements and concurrent counts of both Waterman Road and Bond Road traffic at the project site. The purpose of the short-term traffic noise level measurements is to determine the accuracy of the FHWA model in describing the existing traffic noise at the project site, accounting for shielding from local topography, actual travel speeds, and roadway grade. Noise measurement results were compared to the FHWA model results by entering the observed traffic volume, speed and distance as inputs to the FHWA model. Based upon the calibration results shown in Appendix B, an offset of -3 dB was applied to FHWA model for the prediction of future Waterman Road traffic noise levels.

Predicted Future (Cumulative) Traffic Noise Levels at the Project Site Average daily traffic volumes for future conditions (2025) were obtained from traffic data, used for the Elk Grove General Plan Noise Element. The day/night distribution and truck percentages were derived from Bollard Acoustical Consultants, Inc. file data for similar roadways. Estimated future traffic speed assumptions were based on posted speed limits and field observations. The FHWA Model inputs are contained in Appendix C. The FHWA model was used with the Appendix C data to predict future traffic noise levels at the project site. The results of that analysis are shown in Table 4.

Table 4 Predicted Future Traffic Noise Levels

Silverado Village Project – Elk Grove, California

Location Noise Level, Ldn

Distance to Noise Contours (feet)1

60 dB Ldn 65 dB Ldn

Bond Road

Lots 9-11 70 dB 348 162

Lot 12-21, 66, 160-175 70 dB

Waterman Road

Lots 29-44 61 dB

Lots 26-27 62 dB 263 122

Lots 39-46, 137 64 dB 1 Predicted distances to noise level contours are from the roadway centerline.

Note: A complete listing of FHWA Model inputs and results is provided in Appendix C.

The Table 4 data indicate that the residences proposed nearest to Bond Road and Waterman Road would be exposed to future traffic noise levels which exceed the City of Elk Grove 60 dB Ldn exterior noise level standard.



Page 7

Exterior Traffic Noise Mitigation for Bond and Waterman Roads To achieve compliance with the City of Elk Grove 60 dB Ldn exterior noise level standard, Bollard Acoustical Consultants, Inc. evaluated the effectiveness of constructing solid noise barriers adjacent to Bond Road and Waterman Road. The FHWA Model traffic noise barrier insertion loss methodology was used to determine the noise reduction which would be provided by noise barriers of various heights. The summarized results of the FHWA barrier analysis for the proposed residences located nearest to Bond Road and Waterman Road are contained in Table 5. The complete inputs and results of the barrier analysis are provided in Appendix D.

Table 5 Predicted Future Traffic Noise Levels with Various Noise Barrier Heights


Road

Location Distance

(feet)

Unmitigated Exterior Noise

Level, Ldn Barrier

Height (feet) Predicted Exterior Noise Level, Ldn

Bond Road

Lots 9-11 80 70

6 7 8 9

10

63 62 61 60 59

Lots 12-21, 66, 160-175

75 70

6 7 8 9

10

64 63 61 60 59

Lots 29-44 160 61

6 7 8

55 54 53

Waterman Road

Lots 26-27 130 62 6 7 8

56 55 54

Lots 39-46, 137 100 64

6 7 8

58 57 55

Note: All barriers are assumed to be located at the property lines of the residential uses adjacent to Bond Road and

Waterman Road. Barrier heights are relative to the proposed building pad elevations. Distances are measured from

the roadway centerline.



Page 8

The Table 5 data indicate that noise barriers ranging from 6 to 9 feet in height would be required to reduce future Bond Road and Waterman Road traffic noise levels to 60 dB Ldn or less at the proposed backyard areas located nearest to those roadways. The barriers could take the form of a masonry wall, earthen berm, or combination of the two, and should wrap away from the roadway at the barrier ends, as indicated in Figure 2.

Prediction of Interior Traffic Noise Levels within Project Residences Residences Along Bond Road The Table 4 data indicate that future Bond Road noise levels at unshielded first-floor locations would be approximately 70 dB Ldn. Following construction of a property line noise barrier, future traffic noise levels at first-floor facades will be approximately 60 dB Ldn. Due to reduced ground attenuation at elevated positions, second floor noise levels are generally 2 dB higher than unshielded first floor locations (72 dB Ldn or less). To achieve compliance with the City of Elk Grove 45 dB Ldn interior noise level standard at exposed second-floor rooms adjacent to Bond Road, building facade noise level reductions of 27 dB or less would be required. At first-floor facades, a building facade noise reduction of 15 dB would be required. Standard residential construction (stucco, STC-28 windows, door weather-stripping, exterior wall insulation, composition plywood roof), results in an exterior to interior noise reduction of at least 25 dB with windows closed and approximately 15 dB with windows open. Therefore, standard construction would be acceptable for shielded first-floor facades, but would fail to provide the required noise reduction at elevated (unshielded) second-floor facades. To achieve the required degree of noise reduction at the second floor facades located adjacent to Bond Road, all second-floor windows from which Bond Road is visible should be upgraded to an STC rating of 30. In addition, mechanical ventilation (air conditioning) should be provided to allow the occupants to close doors and windows as desired for additional acoustical isolation. Residences Along Waterman Road The Table 3 data indicate that future Waterman Road noise levels at unshielded first-floor locations would be approximately 64 dB Ldn. Following construction of a property line noise barrier, future traffic noise levels at first-floor facades will be approximately 58 dB Ldn. Due to reduced ground attenuation at elevated positions, second-floor noise levels are generally 2 dB higher than unshielded first floor locations (66 dB Ldn or less). To achieve compliance with the City of Elk Grove 45 dB Ldn interior noise level standard at exposed second-floor rooms adjacent to Waterman Road, building facade noise level reductions of 21 dB or less would be required. At first-floor facades, a building facade noise reduction of 15 dB would be required.



Page 9

Standard residential construction (stucco, STC-28 windows, door weather-stripping, exterior wall insulation, composition plywood roof), results in an exterior to interior noise reduction of at least 25 dB with windows closed and approximately 15 dB with windows open. Therefore, standard construction would be acceptable for both first and second-floor facades of this development. Mechanical ventilation (air conditioning) should be provided to allow the occupants to close doors and windows as desired for additional acoustical isolation.

Predicted Increases in Off-Site Traffic Noise Levels Resulting from the Project The FHWA Model was used to predict existing and existing plus project traffic noise levels for the major local roadways which would be used by project traffic. The complete FHWA Model inputs and results are provided in Appendices E & F. Tables 6 & 7 show the predicted existing and future (cumulative) traffic noise levels, respectively, both with and without the project at a normalized distance of 100 feet from the roadway centerlines. Tables 6 and 7 also show the project-related increase in traffic noise levels along those roadways.

Table 6 Predicted Existing Traffic Noise Levels with and without the Proposed Project


Segment Roadway Name Segment Description E E+P ∆

1 Bond Road West of Elk Grove Florin Rd. 66 67 1 2 Elk Grove Florin Rd. to Quail Cove Dr. 66 66 0 3 Quail Cove Dr. to Crowell Dr. 65 66 1 4 Crowell Dr. to Waterman Rd. 66 66 0 5 East of Waterman Rd. 65 65 0 6 Elk Grove Florin Road North of Bond Rd. 66 66 0 7 South of Bond Rd. 65 65 0 8 Quail Cove Dr. North of Bond Rd. 50 50 0 9 South of Bond Rd. 57 57 0

10 Crowell Dr. South of Bond Rd. 55 55 0 11 Waterman Rd. North of Sheldon Rd. 62 62 0 12 Sheldon Rd. to Bond Rd. 61 62 1 13 South of Bond Rd. 63 63 0 14 Sheldon Rd. West of Waterman Rd. 62 62 0 15 East of Waterman Rd. 60 60 0

Source: Fehr & Peers Associates, FHWA Model (RD-77-108), and BAC file data.



Page 10

Table 7 Predicted Future (Cumulative) Traffic Noise Levels with and without the Proposed Project


Segment Roadway Name Segment Description C C+P ∆

1 Bond Road West of Elk Grove Florin Rd. 70 70 0 2 Elk Grove Florin Rd. to Quail Cove Dr. 68 68 0 3 Quail Cove Dr. to Crowell Dr. 68 68 0 4 Crowell Dr. to Waterman Rd. 68 68 0 5 East of Waterman Rd. 68 68 0 6 Elk Grove Florin Road North of Bond Rd. 69 69 0 7 South of Bond Rd. 68 69 1 8 Quail Cove Dr. North of Bond Rd. N/A N/A N/A 9 South of Bond Rd. N/A N/A N/A

10 Crowell Dr. South of Bond Rd. N/A N/A N/A 11 Waterman Rd. North of Sheldon Rd. 66 66 0 12 Sheldon Rd. to Bond Rd. 66 66 0 13 South of Bond Rd. 66 66 0 14 Sheldon Rd. West of Waterman Rd. 67 67 0 15 East of Waterman Rd. 67 67 0

Source: City of Elk Grove General Plan EIR, FHWA Model (RD-77-108), and BAC file data. N/A = cumulative traffic volume data for these roadways was not available in the City’s General Plan EIR.

The Table 6 and 7 data indicate that increases in off-site traffic noise levels resulting from the additional traffic generated by the proposed project would range from 0-1 dB. Because this range of increases is below the significance criteria identified in Table 3, this impact would be considered less than significant.

Park Noise Generation As indicated in Figure 2, the project proposes two park areas. Specifically, a roughly 5-acre park is proposed at the northern portion of the project site on Lot F, and a 0.6-acre park is proposed in the south-central portion of the project site on Lot J. No designs have been developed for these parks at this time, but it is known that the Lot J park would be provided for passive recreation only due to its small size, and that active recreation would occur at the northern park site (Lot F). Given the passive recreation usage of Lot J, no adverse noise impacts are anticipated from this park usage. Although no design has been developed for the Lot F park, it would likely include active recreation areas such as baseball diamonds and soccer fields. The most significant noise sources associated with the future park usage would likely be crowd cheering during baseball and soccer games. Reference noise level data collected by BAC staff at soccer and baseball facilities indicates that average noise levels during games can be expected to be approximately 55 dB Leq at a distance of 100 feet from the center of the soccer field or pitcher’s mound.



Page 11

Because of the intervening “A” Street, the nearest proposed residential outdoor activity areas

(backyards) in the Silverado development would be located at least 200 feet from the center of the soccer fields or baseball pitcher’s mounds. At that distance, noise generated during intensive use of those facilities would be reduced to less than 50 dB Leq. In addition, because the nearest residences will front on A-Street, the rear yard areas (primary outdoor activity areas) of those nearest residences would be shielded from view of park activities by the intervening residential structures. This shielding is expected to further reduce park-generated noise by at least 5 dB in those backyards. The resulting exterior noise exposure would be approximately 45 dB Leq or less during intensive park usage, which is well within compliance with the City’s 55 dB Leq daytime noise level standard shown in Table 2. As a result, noise impacts associated with normal park usage are not anticipated to be significant at nearby residences provided park activities are limited to daytime hours (10 pm – 7 am).

Construction Noise During the construction phases of the proposed project, noise from construction activities would add to the noise environment in the immediate project vicinity. Activities involved in typical construction would generate maximum noise levels, as indicated in Table 8, ranging from 85 to 90 dB at a distance of 50 feet. Construction activities are proposed to occur during normal daytime working hours. Because project construction in the immediate vicinity of existing residences would be of short duration and would be limited to daytime hours, no adverse noise impacts are identified for project construction activities.

Table 8 Construction Equipment Noise

Type of Equipment Maximum Level, dB at 50 feet Bulldozers 87

Heavy Trucks 88 Backhoe 85

Pneumatic Tools 85 Portable Crushing Plant 90

Source: Environmental Noise Pollution, Patrick R. Cunniff, 1977. Bollard Acoustical Consultants file data for portable crushing plants, 2008.

Future Off-Site Commercial Activity According to the project site plans, the property located adjacent to the southeast corner of the project site (at the corner of Waterman and Bond Roads), is proposed for future commercial uses. Because the specific nature of the future commercial use which would be located at that site is unknown, a detailed impact assessment cannot be performed relative to this future activity at this time. However, such an assessment would be required when specific plans have been developed for this commercial site, with any noise mitigation required of the commercial use to be implemented at that time by the commercial applicant. Specific aspects of the



Page 12

commercial use which should be evaluated when a specific application has been filed for the commercial use would include loading dock activities, rooftop and ground-mounted mechanical equipment, parking lot movements, and any other significant noise-generating activities which may be associated with the proposed use.

Conclusions Portions of the Silverado Village project site will be exposed to future Bond Road and Waterman Road traffic noise levels which exceed the exterior noise level standards applied to new residential developments by the City of Elk Grove. The following noise mitigation measures should be utilized to achieve compliance with the City’s noise standards:

• A uniform 9-foot tall noise barrier should be constructed along the south property lines of all proposed residential uses adjacent to Bond Road to reduce future traffic noise levels to 60 dB Ldn or less within proposed backyards. The recommended barrier should wrap at the ends as indicated in Figure 2.

• A uniform 6-foot tall noise barrier should be constructed along the eastern property lines of Waterman Road to reduce future traffic noise levels to 60 dB Ldn or less at proposed backyard areas located adjacent to that roadway. The recommended barrier should wrap at the ends as indicated in Figure 2.

• Air conditioning should be included in all residences constructed in the Silverado Village development to allow occupants to close doors and windows as desired to achieve additional acoustic isolation from traffic noise in the project vicinity.

These conclusions are based on the site plan shown in Figure 2, Bollard Acoustical Consultants, Inc. site observations, and the traffic assumptions stated in this report. Changes to the site plan or deviations from the assumptions cited herein could cause future noise levels to differ from those predicted in this analysis. Bollard Acoustical Consultants, Inc. is not responsible for degradation in acoustic performance of the residential construction due to poor construction practices or failure to comply with applicable building code requirements.

Appendix AAcoustical Terminology

Acoustics The science of sound.

Ambient The distinctive acoustical characteristics of a given space consisting of all noise sources Noise audible at that location. In many cases, the term ambient is used to describe an existing

or pre-project condition such as the setting in an environmental noise study.

Attenuation The reduction of an acoustic signal.

A-Weighting A frequency-response adjustment of a sound level meter that conditions the output signalto approximate human response.

Decibel or dB Fundamental unit of sound, A Bell is defined as the logarithm of the ratio of the soundpressure squared over the reference pressure squared. A Decibel is one-tenth of a Bell.

CNEL Community Noise Equivalent Level. Defined as the 24-hour average noise level withnoise occurring during evening hours (7 - 10 p.m.) weighted by a factor of three andnighttime hours weighted by a factor of 10 prior to averaging.

Frequency The measure of the rapidity of alterations of a periodic signal, expressed in cycles persecond or hertz.

Ldn Day/Night Average Sound Level. Similar to CNEL but with no evening weighting.

Leq Equivalent or energy-averaged sound level.

Lmax The highest root-mean-square (RMS) sound level measured over a given period of time.

Loudness A subjective term for the sensation of the magnitude of sound.

Masking The amount (or the process) by which the threshold of audibility is for one sound is raisedby the presence of another (masking) sound.

Noise Unwanted sound.

Peak Noise The level corresponding to the highest (not RMS) sound pressure measured over a givenperiod of time. This term is often confused with the Maximum level, which is the highestRMS level.

RT6060 The time it takes reverberant sound to decay by 60 dB once the source has beenremoved.

Sabin The unit of sound absorption. One square foot of material absorbing 100% of incidentsound has an absorption of 1 sabin.

SEL A rating, in decibels, of a discrete event, such as an aircraft flyover or train passby, that compresses the total sound energy of the event into a 1-s time period.

Threshold The lowest sound that can be perceived by the human auditory system, generally of Hearing considered to be 0 dB for persons with perfect hearing.

Threshold Approximately 120 dB above the threshold of hearing. of Pain

Job Number: Project Name:

Roadway Tested:Test Location:

Test Date:

Temperature (Fahrenheit):Relative Humidity:

Wind Speed and Direction:Cloud Cover:

Sound Level Meter:Calibrator:

Meter Calibrated:Meter Settings:

Microphone Location:Distance to Centerline (feet):

Microphone Height:Intervening Ground (Hard or Soft):Elevation Relative to Road (feet):

P t T

Microphone:

R d C diti

Immediately before

On project site1005 feet above ground

Sound Level Meter:

CalmClear

Weather Conditions:

5

Appendix B-1

A h lt

FHWA Traffic Noise Prediction Model (FHWA-RD-77-108) Calibration Worksheet

2011-053Silverado VillageBond Road

Project Information:

August 18, 2011On project site

67Moderate

LDL Model 820

A-weighted, slow response

LDL Model CAL200

Soft

Pavement TypePavement Condition:

Number of Lanes:Posted Maximum Speed (mph):

Test Time:Test Duration (minutes):

Observed Number Automobiles:Observed Number Medium Trucks:

Observed Number Heavy Trucks:Observed Average Speed (mph):

Measured Average Level (Leq):Level Predicted by FHWA Model:

Difference: 0.3 dB

Test Parameters:

Model Calibration:

45

2424

Conclusions:

Roadway Condition:

15

AsphaltGood

9:38 AM

1

62.3

445

62.0

Job Number: Project Name:

Roadway Tested:Test Location:

Test Date:

Temperature (Fahrenheit):Relative Humidity:

Wind Speed and Direction:Cloud Cover:

Sound Level Meter:Calibrator:

Meter Calibrated:Meter Settings:

Microphone Location:Distance to Centerline (feet):

Microphone Height:Intervening Ground (Hard or Soft):Elevation Relative to Road (feet):

P t T

Microphone:

R d C diti

Immediately before

On project site1005 feet above ground

Sound Level Meter:

4 mph WClear

Weather Conditions:

0

Appendix B-2

A h lt

FHWA Traffic Noise Prediction Model (FHWA-RD-77-108) Calibration Worksheet

2011-053Silverado VillageWaterman Road


August 18, 2011On project site

6958%

LDL Model 820

A-weighted, slow response

LDL Model CAL200

Soft

Pavement TypePavement Condition:

Number of Lanes:Posted Maximum Speed (mph):

Test Time:Test Duration (minutes):

Observed Number Automobiles:Observed Number Medium Trucks:

Observed Number Heavy Trucks:Observed Average Speed (mph):

Measured Average Level (Leq):Level Predicted by FHWA Model:

Difference: 4.9 dB

Test Parameters:

Model Calibration:

45

972

Conclusions:

Roadway Condition:

15

AsphaltGood

10:14 AM

3

59.9

255

55.0

202536,317

85151145

Soft

Medium HeavyLocation: Description Distance Offset (dB) Autos Trucks Trucks Total

1 Lots 9-11 80 0 69 57 61 702 Lots 12-21, 66, 160-175 75 0 69 57 62 70

Ldn Contour, dB75706560

Notes:

Intervening Ground Type (hard/soft):

162348


Traffic Data:

Traffic Noise Levels:

Traffic Noise Contours (No Calibration Offset):

-----------------Ldn, dB------------------

Distance from Centerline, (ft)35

2011-053Silverado Village

Percent Nighttime Traffic:Percent Medium Trucks (2 axle):

Job Number:Project Name:

Roadway Name:

Year:

Appendix C-1

75

Bond Road

Percent Heavy Trucks (3+ axle):Assumed Vehicle Speed (mph):

FHWA Traffic Noise Prediction Model (FHWA-RD-77-108) Noise Prediction Worksheet

Average Daily Traffic Volume:Percent Daytime Traffic:

202523,843

85151145

Soft

Medium HeavyLocation: Description Distance Offset (dB) Autos Trucks Trucks Total

1 Lots 29-44 160 -3 60 48 53 612 Lots 26-27 130 -3 61 49 54 623 Lots 39-46, 137 100 -3 63 51 56 64

Ldn Contour, dB75706560

Notes:

Intervening Ground Type (hard/soft):

122263


Traffic Data:

Traffic Noise Levels:

Traffic Noise Contours (No Calibration Offset):

-----------------Ldn, dB------------------

Distance from Centerline, (ft)26

2011-053Silverado Village

Percent Nighttime Traffic:Percent Medium Trucks (2 axle):


Roadway Name:

Year:

Appendix C-2

57

Waterman Road

Percent Heavy Trucks (3+ axle):Assumed Vehicle Speed (mph):

FHWA Traffic Noise Prediction Model (FHWA-RD-77-108) Noise Prediction Worksheet

Average Daily Traffic Volume:Percent Daytime Traffic:

695761

65150280506

Receiver Description:

Medium Truck Elevation:Heavy Truck Elevation:

Receiver Elevation1:

Lots 9-11Centerline to Barrier Distance (C1):

Barrier to Receiver Distance (C2):

Pad/Ground Elevation at Receiver:

Barrier Effectiveness:

Base of Barrier Elevation:Starting Barrier Height

Auto Ldn, dB:2025


Automobile Elevation:

Roadway Name:

Year:

Silverado Village

Heavy Truck Ldn, dB:Medium Truck Ldn, dB:

2011-053

Noise Barrier Effectiveness Prediction WorksheetFHWA Traffic Noise Prediction Model (FHWA-RD-77-108)Appendix D-1


Noise Level Data:

Site Geometry:

Bond RoadLots 9-11Location(s):

AutosMedium Trucks

Heavy Trucks Total Autos?

Medium Trucks?

Heavy Trucks?

6 62 51 56 63 Yes Yes Yes7 61 50 56 62 Yes Yes Yes8 60 48 55 61 Yes Yes Yes9 58 47 53 60 Yes Yes Yes10 58 46 52 59 Yes Yes Yes11 57 45 51 58 Yes Yes Yes12 56 44 50 57 Yes Yes Yes13 55 44 49 56 Yes Yes Yes14 54 43 48 55 Yes Yes Yes

Notes:

78

13

6

Top of Barrier

Elevation (ft)Barrier

Height2 (ft)

14

9101112

Barrier Breaks Line of Sight to…


-------------------- Ldn, dB --------------------

1.Standard receiver elevation is five feet above grade/pad elevations at the receiver location(s)

695762

60150280506

Appendix D-2FHWA Traffic Noise Prediction Model (FHWA-RD-77-108)Noise Barrier Effectiveness Prediction Worksheet

Project Information: Job Number: 2011-053

Heavy Truck Ldn, dB:

Project Name: Silverado VillageRoadway Name: Bond Road

Location(s): Lots 12-21, 66, 160-175

Noise Level Data: Year: 2025Auto Ldn, dB:

Medium Truck Ldn, dB:

Base of Barrier Elevation:

Site Geometry: Receiver Description: Lots 12-21, 66, 160-175Centerline to Barrier Distance (C1):

Barrier to Receiver Distance (C2):Automobile Elevation:


Pad/Ground Elevation at Receiver:Receiver Elevation1:

Starting Barrier Height


AutosMedium Trucks


Medium Trucks?

Heavy Trucks?


Notes:

10


Top of Barrier


Height2 (ft)

-------------------- Ldn, dB -------------------- Barrier Breaks Line of Sight to…

6789

11121314


604853

145150280506

Receiver Description:


Receiver Elevation1:

Lots 29-44Centerline to Barrier Distance (C1):

Barrier to Receiver Distance (C2):

Pad/Ground Elevation at Receiver:


Base of Barrier Elevation:Starting Barrier Height

Auto Ldn, dB:2025


Automobile Elevation:

Roadway Name:

Year:

Silverado Village

Heavy Truck Ldn, dB:Medium Truck Ldn, dB:

2011-053

Noise Barrier Effectiveness Prediction WorksheetFHWA Traffic Noise Prediction Model (FHWA-RD-77-108)Appendix D-3


Noise Level Data:

Site Geometry:

Waterman RoadLots 29-44Location(s):

AutosMedium Trucks


Medium Trucks?

Heavy Trucks?


Notes:

78

13

6

Top of Barrier


Height2 (ft)

14

9101112



-------------------- Ldn, dB --------------------


614954

115150280506



Heavy Truck Ldn, dB:

Project Name: Silverado VillageRoadway Name: Waterman Road

Location(s): Lots 26-27


Medium Truck Ldn, dB:


Site Geometry: Receiver Description: Lots 26-27Centerline to Barrier Distance (C1):




Starting Barrier Height


AutosMedium Trucks


Medium Trucks?

Heavy Trucks?


Notes:

10


Top of Barrier


Height2 (ft)

-------------------- Ldn, dB -------------------- Barrier Breaks Line of Sight to…

6789

11121314


635156

85150280506Starting Barrier Height



Site Geometry: Receiver Description: Lots 39-46, 137Centerline to Barrier Distance (C1):





Medium Truck Ldn, dB:Heavy Truck Ldn, dB:

Project Name: Silverado VillageRoadway Name: Waterman Road

Location(s): Lots 39-46, 137



AutosMedium Trucks


Medium Trucks?

Heavy Trucks?


Notes:

11121314



678910


Top of Barrier


Height2 (ft)

-------------------- Ldn, dB --------------------

Project #:Description:Ldn/CNEL: LdnHard/Soft: Soft

% Med. % Hvy. OffsetSegment Roadway Name Segment Description ADT Day % Eve % Night % Trucks Trucks Speed Distance (dB)

1 Bond Road West of Elk Grove Florin Rd. 24,150 85 15 1 1 45 1002 Elk Grove Florin Rd. to Quail Cove Dr. 21,970 85 15 1 1 45 1003 Quail Cove Dr. to Crowell Dr. 18,250 85 15 1 1 45 1004 Crowell Dr. to Waterman Rd. 20,090 85 15 1 1 45 1005 East of Waterman Rd. 15,780 85 15 1 1 45 1006 Elk Grove Florin Road North of Bond Rd. 23,570 85 15 1 1 45 1007 South of Bond Rd. 18,990 85 15 1 1 45 1008 Quail Cove Dr. North of Bond Rd. 1,070 85 15 1 1 35 1009 South of Bond Rd. 5,110 85 15 1 1 35 10010 Crowell Dr. South of Bond Rd. 3,420 85 15 1 1 35 10011 Waterman Rd. North of Sheldon Rd. 8,140 85 15 1 1 45 100

Appendix E-1

2011-053 Silverado Village

FHWA-RD-77-108 Highway Traffic Noise Prediction Model

Existing

Data Input Sheet

11 Waterman Rd. North of Sheldon Rd. 8,140 85 15 1 1 45 10012 Sheldon Rd. to Bond Rd. 7,810 85 15 1 1 45 10013 South of Bond Rd. 10,480 85 15 1 1 45 10014 Sheldon Rd. West of Waterman Rd. 8,330 85 15 1 1 45 10015 East of Waterman Rd. 5,660 85 15 1 1 45 100



1 Bond Road West of Elk Grove Florin Rd. 25,000 85 15 1 1 45 1002 Elk Grove Florin Rd. to Quail Cove Dr. 23,810 85 15 1 1 45 1003 Quail Cove Dr. to Crowell Dr. 20,000 85 15 1 1 45 1004 Crowell Dr. to Waterman Rd. 21,920 85 15 1 1 45 1005 East of Waterman Rd. 17,000 85 15 1 1 45 1006 Elk Grove Florin Road North of Bond Rd. 23,910 85 15 1 1 45 1007 South of Bond Rd. 19,640 85 15 1 1 45 1008 Quail Cove Dr. North of Bond Rd. 1,110 85 15 1 1 35 1009 South of Bond Rd. 5,150 85 15 1 1 35 10010 Crowell Dr. South of Bond Rd. 3,460 85 15 1 1 35 10011 Waterman Rd. North of Sheldon Rd. 8,240 85 15 1 1 45 100

Appendix E-2FHWA-RD-77-108 Highway Traffic Noise Prediction ModelData Input Sheet

2011-053 Silverado VillageExisting Plus Project



Medium HeavySegment Roadway Name Segment Description Autos Trucks Trucks Total

1 Bond Road West of Elk Grove Florin Rd. 65.4 53.7 58.2 662 Elk Grove Florin Rd. to Quail Cove Dr. 64.9 53.3 57.8 663 Quail Cove Dr. to Crowell Dr. 64.1 52.5 57.0 654 Crowell Dr. to Waterman Rd. 64.6 52.9 57.4 665 East of Waterman Rd. 63.5 51.8 56.3 656 Elk Grove Florin Road North of Bond Rd. 65.2 53.6 58.1 667 South of Bond Rd. 64.3 52.6 57.1 658 Quail Cove Dr. North of Bond Rd. 48.7 38.5 43.6 509 South of Bond Rd. 55.5 45.2 50.4 5710 Crowell Dr. South of Bond Rd. 53.7 43.5 48.7 5511 Waterman Rd. North of Sheldon Rd. 60.6 49.0 53.5 62

Existing

FHWA-RD-77-108 Highway Traffic Noise Prediction ModelPredicted Levels

Appendix E-3


11 Waterman Rd. North of Sheldon Rd. 60.6 49.0 53.5 6212 Sheldon Rd. to Bond Rd. 60.5 48.8 53.3 6113 South of Bond Rd. 61.7 50.1 54.6 6314 Sheldon Rd. West of Waterman Rd. 60.7 49.1 53.6 6215 East of Waterman Rd. 59.1 47.4 51.9 60



1 Bond Road West of Elk Grove Florin Rd. 65.5 53.8 58.3 672 Elk Grove Florin Rd. to Quail Cove Dr. 65.3 53.6 58.1 663 Quail Cove Dr. to Crowell Dr. 64.5 52.9 57.4 664 Crowell Dr. to Waterman Rd. 64.9 53.3 57.8 665 East of Waterman Rd. 63.8 52.2 56.7 656 Elk Grove Florin Road North of Bond Rd. 65.3 53.6 58.1 667 South of Bond Rd. 64.5 52.8 57.3 658 Quail Cove Dr. North of Bond Rd. 48.8 38.6 43.8 509 South of Bond Rd. 55.5 45.3 50.5 5710 Crowell Dr. South of Bond Rd. 53.8 43.6 48.7 5511 Waterman Rd. North of Sheldon Rd. 60.7 49.0 53.5 62

Appendix E-4FHWA-RD-77-108 Highway Traffic Noise Prediction ModelPredicted Levels

2011-053 Silverado VillageExisting Plus Project




1 Bond Road West of Elk Grove Florin Rd. 59,708 85 15 1 1 45 1002 Elk Grove Florin Rd. to Quail Cove Dr. 31,870 85 15 1 1 45 1003 Quail Cove Dr. to Crowell Dr. 31,870 85 15 1 1 45 1004 Crowell Dr. to Waterman Rd. 31,870 85 15 1 1 45 1005 East of Waterman Rd. 31,870 85 15 1 1 45 1006 Elk Grove Florin Road North of Bond Rd. 48,756 85 15 1 1 45 1007 South of Bond Rd. 39,060 85 15 1 1 45 1008 Quail Cove Dr. North of Bond Rd. N/A 85 15 1 1 35 1009 South of Bond Rd. N/A 85 15 1 1 35 10010 Crowell Dr. South of Bond Rd. N/A 85 15 1 1 35 10011 Waterman Rd. North of Sheldon Rd. 22,183 85 15 1 1 45 100

Appendix F-1


FHWA-RD-77-108 Highway Traffic Noise Prediction Model

Future

Data Input Sheet




1 Bond Road West of Elk Grove Florin Rd. 60,558 85 15 1 1 45 1002 Elk Grove Florin Rd. to Quail Cove Dr. 33,710 85 15 1 1 45 1003 Quail Cove Dr. to Crowell Dr. 33,620 85 15 1 1 45 1004 Crowell Dr. to Waterman Rd. 33,700 85 15 1 1 45 1005 East of Waterman Rd. 33,090 85 15 1 1 45 1006 Elk Grove Florin Road North of Bond Rd. 49,096 85 15 1 1 45 1007 South of Bond Rd. 39,710 85 15 1 1 45 1008 Quail Cove Dr. North of Bond Rd. N/A 85 15 1 1 35 1009 South of Bond Rd. N/A 85 15 1 1 35 10010 Crowell Dr. South of Bond Rd. N/A 85 15 1 1 35 10011 Waterman Rd. North of Sheldon Rd. 22,283 85 15 1 1 45 100

Appendix F-2FHWA-RD-77-108 Highway Traffic Noise Prediction ModelData Input Sheet

2011-053 Silverado VillageFuture Plus Project




1 Bond Road West of Elk Grove Florin Rd. 69.3 57.6 62.1 702 Elk Grove Florin Rd. to Quail Cove Dr. 66.6 54.9 59.4 683 Quail Cove Dr. to Crowell Dr. 66.6 54.9 59.4 684 Crowell Dr. to Waterman Rd. 66.6 54.9 59.4 685 East of Waterman Rd. 66.6 54.9 59.4 686 Elk Grove Florin Road North of Bond Rd. 68.4 56.7 61.2 697 South of Bond Rd. 67.4 55.8 60.3 688 Quail Cove Dr. North of Bond Rd. N/A N/A N/A N/A9 South of Bond Rd. N/A N/A N/A N/A10 Crowell Dr. South of Bond Rd. N/A N/A N/A N/A11 Waterman Rd. North of Sheldon Rd. 65.0 53.3 57.8 66

Future

FHWA-RD-77-108 Highway Traffic Noise Prediction ModelPredicted Levels

Appendix F-3





1 Bond Road West of Elk Grove Florin Rd. 69.3 57.7 62.2 702 Elk Grove Florin Rd. to Quail Cove Dr. 66.8 55.1 59.6 683 Quail Cove Dr. to Crowell Dr. 66.8 55.1 59.6 684 Crowell Dr. to Waterman Rd. 66.8 55.1 59.6 685 East of Waterman Rd. 66.7 55.1 59.6 686 Elk Grove Florin Road North of Bond Rd. 68.4 56.8 61.3 697 South of Bond Rd. 67.5 55.9 60.3 698 Quail Cove Dr. North of Bond Rd. N/A N/A N/A N/A9 South of Bond Rd. N/A N/A N/A N/A10 Crowell Dr. South of Bond Rd. N/A N/A N/A N/A11 Waterman Rd. North of Sheldon Rd. 65.0 53.3 57.8 66

Appendix F-4FHWA-RD-77-108 Highway Traffic Noise Prediction ModelPredicted Levels

2011-053 Silverado VillageFuture Plus Project


silverado village project - home - city of elk grove

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