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HomeMy Public PortalAboutAppendix C_Noise StudyEnvironmentalNoise Assessment PC-3 EIR Town of Truckee, California Job # 20'10-108 Prepared For: De Novo Planning Group 4630 Brand Way Sacramento, CA 95819 Attn. Mr. Ben Ritchie Prepared By: lnc. Institute of Noise Control Engineering April 16,2013 i.c. brennan & associates'/\/\/\/Tottsttlttnts itr ttcousf it s P.O. Box 6748 - 263 Nevada Street - Auburn, California 95603 -p: (530) 823-0960 -f: (530) 823-0961 1 INTRODUCTION This section discusses the existing noise environment in the project vicinity, and identifies potential noise impacts and mitigation measures related to development of the Joerger Ranch / PC-3 Mixed Use Development project. Specifically, this section analyzes potential noise impacts due to and upon development of the project relative to applicable noise criteria and to the existing ambient noise environment. PROJECT DESCRIPTION The Specific Plan proposes to develop six separate zoning districts dispersed over the 66.61 acre Plan Area, each with specified targeted uses and site development standards. The six zoning districts and their locations are shown on Figure 1. In addition to the development of the six zoning districts, the Specific Plan proposes a large lot tentative map that subdivides the six zoning districts into 14 individual parcels. Table 1 shows the proposed summary of zoning, acreage and development. In addition, the project includes several roadway and infrastructure construction-related projects. Table 1: Summary of Zoning, Acreage, and Development Potential Zoning Designation Acreage Development Potential Regional Commercial (CR) 11.69 101,843 sf Regional Support Commercial (CRS) 6.07 52,881 sf Lifestyle Commercial (CL) 7.59 66,124 sf Manufacturing/Industrial (M1) 13.57 118,222 sf Business Innovation Zone (BIZ) 13.97 121,707 sf Multi-Family Residential (RM) 3.48 42 housing units Open Space (OS) 10.24 N/A ENVIRONMENTAL SETTING Acoustical Terminology1 Acoustics is the science of sound. Sound may be thought of as mechanical energy of a vibrating object transmitted by pressure waves through a medium to human (or animal) ears. If the pressure variations occur frequently enough (at least 20 times per second), then they can be heard and are called sound. The number of pressure variations per second is called the frequency of sound, and is expressed as cycles per second or Hertz (Hz). Noise is a subjective reaction to different types of sounds. Noise is typically defined as (airborne) sound that is loud, unpleasant, unexpected or undesired, and may therefore 1 For an explanation of these terms, see Appendix A: "Acoustical Terminology" 2 be classified as a more specific group of sounds. Perceptions of sound and noise are highly subjective. Often, someone’s music is described as noise by another. Measuring sound directly in terms of pressure would require a very large and awkward range of numbers. To avoid this, the decibel scale was devised. The decibel scale uses the hearing threshold (20 micropascals), as a point of reference, defined as 0 dB. Other sound pressures are then compared to this reference pressure, and the logarithm is taken to keep the numbers in a practical range. The decibel scale allows a million-fold increase in pressure to be expressed as 120 dB, and changes in levels (dB) correspond closely to human perception of relative loudness. The perceived loudness of sounds is dependent upon many factors, including sound pressure level and frequency content. However, within the usual range of environmental noise levels, perception of loudness is relatively predictable, and can be approximated by A-weighted sound levels. There is a strong correlation between A-weighted sound levels (expressed as dBA) and the way the human ear perceives sound. For this reason, the A-weighted sound level has become the standard tool of environmental noise assessment. All noise levels reported in this section are in terms of A-weighted levels, but are expressed as dB, unless otherwise noted. The decibel scale is logarithmic, not linear. In other words, two sound levels 10 dB apart differ in acoustic energy by a factor of 10. When the standard logarithmic decibel is A- weighted, an increase of 10 dBA is generally perceived as a doubling in loudness. For example, a 70 dBA sound is half as loud as an 80 dBA sound, and twice as loud as a 60 dBA sound. Community noise is commonly described in terms of the ambient noise level, which is defined as the all-encompassing noise level associated with a given environment. A common statistical tool to measure the ambient noise level is the average, or equivalent, sound level (Leq), which corresponds to a steady-state A weighted sound level containing the same total energy as a time varying signal over a given time period (usually one hour). The Leq is the foundation of the composite noise descriptor, Ldn, and shows very good correlation with community response to noise. The day/night average level (Ldn) is based upon the average noise level over a 24-hour day, with a +10 decibel weighing applied to noise occurring during nighttime (10:00 p.m. to 7:00 a.m.) hours. The nighttime penalty is based upon the assumption that people react to nighttime noise exposures as though they were twice as loud as daytime exposures. 3 Fi g u r e 1 - T e n t a t i v e M a p Z o n i n g a n d N o i s e M e a s u r e m e n t S i t e s 1 2 Co n t i n u o u s N o i s e M e a s u r e m e n t S i t e s # 4 Because Ldn represents a 24-hour average, it tends to disguise short-term variations in the noise environment. Table 2 lists several examples of the noise levels associated with common noise sources. Appendix A provides a summary of acoustical terms used in this report. Table 2 - Typical Maximum Nose Levels Common Outdoor Activities Noise Level (dBA) Common Indoor Activities --110-- Rock Band Jet Fly-over at 300 m (1,000 ft)--100-- Gas Lawn Mower at 1 m (3 ft)--90-- Diesel Truck at 15 m (50 ft), at 80 km/hr (50 mph)--80-- Food Blender at 1 m (3 ft) Garbage Disposal at 1 m (3 ft) Noisy Urban Area, Daytime Gas Lawn Mower, 30 m (100 ft)--70-- Vacuum Cleaner at 3 m (10 ft) Commercial Area Heavy Traffic at 90 m (300 ft)--60-- Normal Speech at 1 m (3 ft) Quiet Urban Daytime--50-- Large Business Office Dishwasher in Next Room Quiet Urban Nighttime--40-- Theater, Large Conference Room (Background) Quiet Suburban Nighttime--30-- Library Quiet Rural Nighttime--20-- Bedroom at Night, Concert Hall (Background) --10-- Broadcast/Recording Studio Lowest Threshold of Human Hearing--0-- Lowest Threshold of Human Hearing Source:Caltrans, Technical Noise Supplement, Traffic Noise Analysis Protocol. November 2009. Effects of Noise on People The effects of noise on people can be placed in three categories:  Subjective effects of annoyance, nuisance, and dissatisfaction  Interference with activities such as speech, sleep, and learning  Physiological effects such as hearing loss or sudden startling 5 Environmental noise typically produces effects in the first two categories. Workers in industrial plants can experience noise in the last category. There is no completely satisfactory way to measure the subjective effects of noise or the corresponding reactions of annoyance and dissatisfaction. A wide variation in individual thresholds of annoyance exists and different tolerances to noise tend to develop based on an individual’s past experiences with noise. Thus, an important way of predicting a human reaction to a new noise environment is the way it compares to the existing environment to which one has adapted: the so-called ambient noise level. In general, the more a new noise exceeds the previously existing ambient noise level, the less acceptable the new noise will be judged by those hearing it. With regard to increases in A-weighted noise level, the following relationships occur:  Except in carefully controlled laboratory experiments, a change of 1 dBA cannot be perceived;  Outside of the laboratory, a 3 dBA change is considered a just-perceivable difference;  A change in level of at least 5 dBA is required before any noticeable change in human response would be expected; and  A 10 dBA change is subjectively heard as approximately a doubling in loudness, and can cause an adverse response. Stationary point sources of noise – including stationary mobile sources such as idling vehicles – attenuate (lessen) at a rate of approximately 6 dB per doubling of distance from the source, depending on environmental conditions (i.e. atmospheric conditions and either vegetative or manufactured noise barriers, etc.). Widely distributed noises, such as a large industrial facility spread over many acres, or a street with moving vehicles, would typically attenuate at a lower rate. Existing Land Uses in the Project Vicinity The Truckee-Tahoe Airport, a general aviation facility, is the major land use east of the Plan area. Areas north, west and south of the Plan Area are characterized by a mix of low and medium density residential, commercial and recreational uses. The Ponderosa Golf Course borders a portion of the Plan Area directly to the west. Other land uses in close proximity, but not adjacent to the Plan Area, include a diverse, and distinctly different set of land uses. The area west of the Plan Area is dominated by single and multiple family residential land uses on both sides of Brockway Road, known within the Town General Plan as the Brockway Road Corridor. This corridor is also characterized by open space and recreation lands as well as a variety of local-serving commercial uses fronting Brockway Road. Existing Background Noise Levels 6 During the period of July 16th – July 20th, 2010, j.c. brennan & associates, Inc. conducted two sets of continuous noise level measurements for a period of 48 hours on the project site, and in the vicinity of the project site. The results of the noise level measurements are shown in Table 3. Appendix B graphically shows the results of the continuous noise level measurements. The intent of the noise level measurements was to determine the overall daily noise exposure on the project site, and the temporal distribution of noise levels. Figure 1 shows the location of the continuous and short-term noise measurement sites Based upon the noise measurement results, the project site and surrounding area can be characterized as ranging from moderately loud to fairly quiet.. Major noise sources included local roadway traffic, traffic on State Route 267, and aircraft operations associated with the Truckee-Tahoe Airport.. Equipment used for all noise level measurements included Larson-Davis-Laboratories (LDL) Model 820 precision integrating sound level meters. The sound level meters were calibrated in the field using an LDL Model CAL200 acoustical calibrator to ensure accuracy. Table 3 - Existing Ambient Noise Monitoring Results Average Measured Hourly Noise Levels, (dBA) Daytime (7:00 am - 10:00 pm) Nighttime (10:00 pm - 7 am) Site Date Location Duration 24-hr Ldn Leq L50 Lmax Leq L50 Lmax Continuous Noise Measurement Sites 7/16/2010 61.7 59.8 58 75.9 53.8 48 69.0 1 7/17/2010 Regional Commercial Zoning 24 hours 60.3 58.2 56 73.5 52.5 47 67.2 7/19/2010 57.6 51.2 47 70.1 51.2 46 64.5 2 7/20/2010 Multi-Family Residential Zoning 24-hours 55.8 50.3 48 68.4 49.3 47 62.2 Source - j.c. brennan & associates, Inc. 2010 Existing Roadway Traffic Noise Levels One of the primary noise sources at the project site is traffic along State Route 267 (SR 267) and the local roadway system. The existing traffic noise on the project site can be quantified through the continuous noise measurements, or through existing traffic volumes and truck mix percentages provided by the project traffic consultant and Caltrans. j.c. brennan & associates, Inc. utilized the Federal Highway Administration (FHWA RD77-108) Traffic Noise Prediction Model to determine the existing traffic noise levels on the project site and the project vicinity. The FHWA model is the analytical method currently used for highway traffic noise prediction by most state and local agencies. The FHWA model is based upon the Calveno reference noise factors for automobiles, medium trucks and heavy trucks, with consideration given to vehicle volume, speed, 7 roadway configuration, distance to the receiver, and the acoustical characteristics of the site. The FHWA model was developed to predict hourly Leq values for free-flowing traffic conditions. To predict CNEL values, it is necessary to determine the day/night distribution of traffic and adjust the traffic volume input data to yield an equivalent hourly traffic volume. Average daily traffic (ADT) volumes were provided by the project traffic consultant, and truck mix percentages for existing conditions were obtained from Caltrans. The effective day/night split was based upon the measured hourly noise levels on the project site. The FHWA Model inputs are contained in Appendix C. Table 4 shows the predicted existing traffic noise levels at a reference distance of 100 feet from the roadway centerline. Table 4 - Existing Traffic Noise Levels Distance to Contours (feet) * Roadway Segment Ldn/CNEL @ 100 feet*70 dB CNEL 65 dB CNEL 60 dB CNEL Donner Pass Rd Donner Pass Rd Donner Pass Rd S. of I-80 East Interchange East of Bridge Street West of Bridge Street 60 dB 57 dB 58 dB 21 15 15 45 31 33 96 68 71 S.R. 267 S.R. 267 S.R. 267 S.R. 267 S.R. 267 S.R. 267 I-80 to Brockway Brockway to Town Limit Town Limit to Airport Rd Airport Rd to Northstar Dr Northstar Dr to Summit Summit to S.R. 28 66 dB 67 dB 67 dB 66 dB 65 dB 64 dB 54 60 59 54 50 39 117 129 126 117 107 84 252 278 272 253 231 182 Brockway Rd Brockway Rd Brockway Rd Brockway Rd S.R. 267 to Project Access Project Access to Martis Valley Rd Martis Valley Rd to Palisades Dr Palisades Dr to West River Rd 60 dB 60 dB 64 dB 62 dB 21 21 38 30 46 45 82 65 98 97 176 140 Source: FHWA-RD-77-108 with inputs from LSC, Caltrans and j.c. brennan & associates, Inc. *Distances to traffic noise contours are measured in feet from the centerlines of the roadways. Existing Truckee-Tahoe Airport Noise Levels The Tahoe-Truckee Airport is located to the east of the project site. Based upon the Nevada County Transportation Commission Airport Land Use Compatibility Plan (ALUC) for the airport, there are approximately 135 based aircraft with an anticipated 224 based aircraft in the year 2020. There are approximately 48,000 annual aircraft operations, with an estimated 120,000 annual operations in the year 2020. Figure 2 shows the noise contours used for land use compatibility planning. In addition, noise measurements of individual aircraft operations were conducted in July of 2010. Maximum noise levels from aircraft operations on the portion of the project site which is zoned for multi-family residential ranged between 65 dB Lmax and 75 dB Lmax. Based upon the ALUC, more than 90% of the aircraft operations occur during the daytime hours (7 am - 7 pm). 8 Figure 2 - Truckee-Tahoe Airport Noise Contours for Compatibility Planning 9 Federal Criteria There are no federal regulations related to noise that apply to the Proposed Project. State The State Building Code, Title 24, Part 2 of the State of California Code of Regulations establishes uniform minimum noise insulation performance standards to protect persons within new buildings which house people, including hotels, motels, dormitories, apartment houses and dwellings other than single-family dwellings. Title 24 mandates that interior noise levels attributable to exterior sources shall not exceed 45 dB Ldn or CNEL in any habitable room. Title 24 also mandates that for structures containing noise- sensitive uses to be located where the Ldn or CNEL exceeds 60 dB, an acoustical analysis must be prepared to identify mechanisms for limiting exterior noise to the prescribed allowable interior levels. If the interior allowable noise levels are met by requiring that windows be kept close, the design for the structure must also specify a ventilation or air conditioning system to provide a habitable interior environment. Town of Truckee General Plan Noise Element Goals and Policies The following Town of Truckee General Plan Noise Element goals and policies relative to this project. Goal 1: Minimize community noise exposure to excessive noise by ensuring compatible land uses relative to noise sources. Policy 1.1: Allow new development only if consistent with the ground transportation noise compatibility guidelines and policies of this Element. Noise measurements used in establishing compatibility shall be measured in dBA CNEL and based on worst case noise levels, either existing or future, with future noise levels to be predicted based on projected 2025 levels. Policy 1.2: Require new development to mitigate exterior noise to “normally acceptable” levels in outdoor areas where quiet is a benefit such as in the backyards of single-family homes. Policy 1.3: Enforce the California Noise Insulation Standards for interior noise levels attributable to exterior sources for all proposed new single- and multi-family residences. (Note: This is an interior noise level of 45 dB Ldn/CNEL) Goal 2: Address noise issues through the planning and permitting process. Policy 2.1: Require mitigation of all significant noise impacts as a condition of project approval. 10 Policy 2.2: Require preparation of a noise analysis which is to include recommendations for mitigation for all proposed projects which may result in potentially significant noise impacts to nearby noise sensitive land uses. Policy 2.3: Require preparation of a noise analysis which is to include recommendations for mitigation for all proposed development within noise impacted areas that may be exposed to levels greater than “normally acceptable.” Policy 2.4: Discourage the construction of sound walls and require development projects to evaluate site design techniques, building setbacks, earthen berms, alternative architectural layouts and other means to meet noise reduction requirements. Goal 3: Reduce noise levels from sources such as domestic uses, construction and car stereos, and from mobile sources, including motor vehicle traffic and aircraft operations. Policy 3.13: Require the following standard construction noise control measures to be included as requirements at construction sites in order to minimize construction noise impacts.  Equip all internal combustion engine driven equipment with intake and exhaust mufflers that are in good condition and appropriate for the equipment.  Locate stationary noise generating equipment as far as possible from sensitive receptors when sensitive receptors adjoin or are near a construction project area.  Utilize “quiet” air compressors and other stationary noise-generating equipment where appropriate technology exists.  The project sponsor shall designate a “disturbance coordinator” who would be responsible for responding to any local complaints about construction noise. The disturbance coordinator will determine the cause of the noise complaint and will require that reasonable measures warranted to correct the problem be implemented. The project sponsor shall also post telephone number for excessive noise complaints in conspicuous locations in the vicinity of the project site. Additionally, the project sponsor shall send a notice to neighbors in the project vicinity with the information on the construction schedule and the telephone number for noise complaints. The Town of Truckee Noise Element guidelines which are applicable to the land uses located in the project vicinity are provided in Table 5. 11 Table 5 - Town of Truckee Noise Compatibility Guidelines Town of Truckee Development Code The Town of Truckee Development Code essentially contains the Noise Ordinance referred to in the Town of Truckee Noise Element policies. Section 18.44.020 of the development code states that noise complaints associated with the types of commercial uses (loading docks, stationary noise sources, etc.) would be directed to the Community Development Department. Section 18.44.040 states that exterior noise levels, when measured at a noise-sensitive receiving land use, shall not exceed the noise level standards set forth in Table 6 (Table 12 3-8 in the Code). In the event that the ambient noise environment exceeds the Table 6 standards, the applicable standards shall be adjusted to equal the ambient noise level. In addition, the Table 6 standards shall be reduced by 5 dB for simple tone noises, noises consisting primarily of speech or music, or for recurring impulsive noises. Table 6 - Noise Standards by Receiving Land Use Town of Truckee Development Code Cumulative Duration of Intrusive Sound Noise Metric Daytime (7 am to 10 pm) Nighttime (10 pm - 7 am) Hospital, Library, Religious Institution, Residential or School Uses: Cumulative period of 30 minutes per hour L50 55 50 Cumulative period of 15 minutes per hour L25 60 55 Cumulative period of 5 minutes per hour L08 65 60 Cumulative period of 1 minute per hour L02 70 65 Level not to be exceeded for any time during hour Lmax 75 70 Commercial Uses: Cumulative period of 30 minutes per hour L50 65 60 Cumulative period of 15 minutes per hour L25 70 65 Cumulative period of 5 minutes per hour L08 75 70 Cumulative period of 1 minute per hour L02 80 75 Level not to be exceeded for any time during hour Lmax 85 80 Note: Each of the noise limits specified above shall be reduced by 5 dBA for impulsive or simple tone noises or for noises consisting of speech or music. If the existing ambient noise levels exceed that permitted in the first four noise-limit categories, the allowable limit shall be increased to encompass the ambient. Source: Town of Truckee, Title 18- Development Code, Chapter 18.44 – Noise, Amended March 6, 2009 Section 18.44.070 – Exceptions states that the provisions of the chapter do not apply to noise sources associated with non-single family residential construction provided that the activities do not take place before 7 a.m. or after 9 p.m. on any day except Sunday, or before 9 a.m. or after 6 p.m. on Sunday. The provisions of the chapter do not apply to noise sources associated with single family residential construction on a single family lot. 13 Project-Related Noise Level Increase Criteria Besides the Town Noise Element and Draft Development Code standards, the significance of project-related noise level increases may be determined by comparison of no-project noise levels to the expected change in noise levels which will occur because of the project. It is generally recognized that an increase of 3 dB is usually required before most people will perceive a change in noise levels, and an increase of 5 dB is required before the change will be clearly noticeable. A common practice is to assume that a minimally perceptible increase of 3 dB represents a significant increase in ambient noise levels. Table 7 is based upon recommendations made in August 1992 by the Federal Interagency Committee on Noise (FICON) to provide guidance in the assessment of changes in ambient noise levels resulting from aircraft operations. The recommendations are based upon studies that relate aircraft noise levels to the percentage of persons highly annoyed by the noise. Although the FICON recommendations were specifically developed to assess aircraft noise impacts, these criteria have been applied to other sources of noise similarly described in terms of cumulative noise exposure metrics such as the CNEL or Ldn. This metric is generally applied to transportation noise sources, and defines noise exposure in terms of average noise exposure during a 24-hour period with a penalty added to noise that occurs during the nighttime. According to Table 7, an increase in the traffic noise level of 3 dB or more would be significant where the ambient noise level is between 60 dB and 65 dB CNEL. Table 7 - Significance of Changes in Cumulative Noise Exposure <60 dB +5.0 dB or more 60-65 dB+3.0 dB or more >65 dB +1.5 dB or moreSource: Federal Interagency Committee on Noise, Federal Agency Review of Selected Airport Noise Analysis Issuses, August 1992 Vibration Standards Vibration is like noise in that it involves a source, a transmission path, and a receiver. While vibration is related to noise, it differs in that in that noise is generally considered to be pressure waves transmitted through air, whereas vibration usually consists of the excitation of a structure or surface. As with noise, vibration consists of an amplitude and frequency. A person’s perception to the vibration will depend on their individual sensitivity to vibration, as well as the amplitude and frequency of the source and the response of the system which is vibrating. Vibration can be measured in terms of acceleration, velocity, or displacement. A common practice is to monitor vibration measures in terms of peak particle velocities in inches per second. Standards pertaining to perception as well as damage to structures have been developed for vibration levels defined in terms of peak particle velocities. The Town of Truckee does not contain specific policies pertaining to vibration levels. However, vibration levels associated with construction activities are discussed in this report. 14 Human and structural response to different vibration levels is influenced by a number of factors, including ground type, distance between source and receptor, duration, and the number of perceived vibration events. Criteria have been developed by Caltrans, showing the vibration levels which would normally be required to result in damage to structures. The vibration levels are presented in terms of peak particle velocity in inches per second. The threshold for damage to structures ranges from 2 to 6 in/sec. One-half this minimum threshold or 1 in/sec p.p.v. is considered a safe criterion that would protect against architectural or structural damage. The general threshold at which human annoyance could occur is noted as 0.1 in/sec p.p.v. PROJECT NOISE IMPACTS AND MITIGATION MEASURES STANDARDS OF SIGNIFICANCE CEQA guidelines state that implementation of the project would result in significant noise impacts if the project would result in either of the following: a. Exposure of persons to or generation of noise levels in excess of standards established in the Town of Truckee General Plan Noise Element or the Town of Truckee DevelopmentCode. b. Exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels. c. A substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project. The substantial increase in noise levels is defined as being 3 dB if the resulting total noise level would exceed that considered “normally acceptable” for a given land use category. d. A substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project. A substantial increase in noise levels is defined as being 3 dB if the resulting total noise level would exceed that considered “normally acceptable” for a given land use category. e. For a project located within an airport land use plan or, where such a plan has not be adopted, within two miles of a public airport or public use airport, where the project would expose people residing or working in the area to excessive noise levels. f. For a project within the vicinity of a private airstrip, where the project would expose people residing or working in the project area to excessive noise levels. 15 Traffic Noise Prediction Methodology: The Federal Highway Administration (FHWA) Highway Traffic Noise Prediction Model (FHWA RD-77-108) was again used for the prediction of traffic noise levels. The model is based upon the CALVENO noise emission 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. To determine the future traffic noise levels on the project site and in the project vicinity, and relative increases in traffic due to the project, j.c. brennan & associates, Inc. used local roadway traffic information provided by the project traffic consultant. Appendix C shows the complete inputs to the FHWA Noise Prediction Model. Tables 8 and 9 show the predicted Existing 2012 No Project and 2012 Plus Project and the 2032 No Project and 2032 Plus Project Scenarios for traffic noise levels. 16 Ta b l e 8 - P r e d i c t e d E x i s t i n g a n d E x i s t i n g P l u s P r o j e c t T r a f f i c N o i s e L e v e l s Tr a f f i c N o i s e L e v e l s ( C N E L ) @ 1 0 0 f e e t Di s t a n c e t o c o n t o u r s Ex i s t i n g ( i n f e e t ) Distance to Contours Existing + Project ( in feet) Ro a d w a y Se g m e n t Ex i s t i n g No P r o j e c t Ex i s t i n g + Pr o j e c t Ch a n g e 65 d B CN E L 60 d B CN E L 65 dB CNEL 60 dB CNEL Do n n e r P a s s R d Do n n e r P a s s R d Do n n e r P a s s R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t 60 d B 57 d B 58 d B 60 d B 58 d B 58 d B 0 +1 d B 0 45 31 33 96 68 71 46 32 32 100 68 70 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 I- 8 0 t o B r o c k w a y Br o c k w a y t o T o w n L i m i t To w n L i m i t t o A i r p o r t R d Ai r p o r t R d t o N o r t h s t a r D r No r t h s t a r D r t o S u m m i t Su m m i t t o S . R . 2 8 66 d B 67 d B 67 d B 66 d B 65 d B 64 d B 67 d B 67 d B 67 d B 66 d B 66 d B 64 d B +1 d B 0 0 0 +1 d B 0 11 7 12 9 12 6 11 7 10 7 84 25 2 27 8 27 2 25 3 23 1 18 2 141 133 130 122 111 86 305 286 281 264 240 184 Br o c k w a y R d Br o c k w a y R d Br o c k w a y R d Br o c k w a y R d S. R . 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d 60 d B 60 d B 64 d B 62 d B 62 d B 61 d B 64 d B 62 d B +2 d B +1 d B 0 0 46 45 82 65 98 97 17 6 14 0 64 57 89 68 138 122 191 146 So u r c e : j . c . b r e n n a n & a s s o c i a t e s , I n c . - 2 0 1 3 Pr e d i c t e d n o i s e l e v e l s a n d d i s t a n c e s t o co n t o u r s a r e f r o m t h e r o a d w a y c e n t e r l i n e . 17 . Ta b l e 9 - P r e d i c t e d F u t u r e a n d F u t u r e P l u s P r o j e c t T r a f f i c N o i s e L e v e l s Tr a f f i c N o i s e L e v e l s ( C N E L ) @ 1 0 0 f e e t Di s t a n c e t o c o n t o u r s Fu t u r e ( i n f e e t ) Distance to Contours Future + Project ( in feet) Ro a d w a y Se g m e n t Fu t u r e 2 0 3 2 No P r o j e c t Fu t u r e 2 0 3 2 + P r o j e c t Ch a n g e 65 d B CN E L 60 d B CN E L 65 dB CNEL 60 dB CNEL Do n n e r P a s s R d Do n n e r P a s s R d Do n n e r P a s s R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t 61 d B 58 d B 56 d B 61 d B 58 d B 56 d B 0 0 0 52 37 26 11 3 79 55 58 37 25 125 79 54 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 S. R . 2 6 7 I- 8 0 t o B r o c k w a y Br o c k w a y t o T o w n L i m i t To w n L i m i t t o A i r p o r t R d Ai r p o r t R d t o N o r t h s t a r D r No r t h s t a r D r t o S u m m i t Su m m i t t o S . R . 2 8 69 d B 69 d B 69 d B 69 d B 68 d B 64 d B 70 d B 70 d B 70 d B 69 d B 69 d B 65 d B +1 d B +1 d B +1 d B 0 +1 d B +1 d B 17 6 19 9 19 8 17 3 16 9 93 37 9 42 9 42 6 37 4 36 4 20 0 203 201 200 177 172 93 438 434 430 382 371 201 Br o c k w a y R d Br o c k w a y R d Br o c k w a y R d Br o c k w a y R d S. R . 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d 62 d B 62 d B 65 d B 64 d B 63 d B 62 d B 65 d B 64 d B +1 d B 0 0 0 59 59 10 1 81 12 8 12 6 21 7 17 4 76 64 103 81 164 139 222 175 So u r c e : j . c . b r e n n a n & a s s o c i a t e s , I n c . - 2 0 1 3 Pr e d i c t e d n o i s e l e v e l s a n d d i s t a n c e s t o co n t o u r s a r e f r o m t h e r o a d w a y c e n t e r l i n e . 18 Tables 8 and 9 indicate that the project will not result in significant increases in traffic noise levels as compared to the criteria shown in Table 7. Truckee - Tahoe Airport Noise Impact Methodology As a means of evaluating noise levels associated with the Truckee-Tahoe Airport, the noise contours contained in the County Airport Land Use Plan will be compared to the criteria contained in the Truckee General Plan Noise Element land use compatibility criteria. On-Site Retail/Commercial Noise Source Impact Assessment Methodology The types of commercial uses which are expected to be included within the portion of the project site which is designated for mixed use commercial and retail are expected to range between the 5,000 and 8,000 square feet in size, and can include large box stores. The most significant noise-producing components of this project with respect to the potential effects on nearby residential uses, are on-site truck traffic circulation and associated loading activities. Each of these noise sources were evaluated separately through a combination of noise level measurements and application of accepted noise prediction methodologies. Predicted Exterior Noise Levels Due to On-Site Truck Traffic and Loading Dock Activities While all of the uses located within the commercial development will potentially generate on-site truck traffic, the greatest potential for that truck traffic to create excessive noise will occur along truck access and delivery routes. These routes generally occur along the back sides of commercial developments, although many small truck deliveries such as UPS deliveries can occur at the front facades.. Although design plans are not available for the commercial uses, the loading docks could be located at any location on the sites zoned for commercial use. Since it is not possible to determine the typical daily or peak hour number of trucks which may provide deliveries at this time, the typical truck activity for the center can be based upon observations of other commercial uses. It is expected that peak hour activity would occur in the mornings and will consist of up to four (4) tractor-trailer truck deliveries, and up to four(4) step-size vans per peak hour. Based on file data for these types of heavy truck passages and unloading activity noise level data, the sound exposure level (SEL) at a reference distance of 50 feet from a loading dock, and 30 feet from the truck circulation route is approximately 85 dB, and a maximum noise level of 80 dB. Typical medium truck arrivals and departures and unloading are approximately 78 dB SEL and 73 dB Lmax at 50 feet. Based upon the data described above, the following formula can be utilized to determine the hourly noise level due to the truck traffic passbys and loading dock activities: Leq = 85 + 10 * (log Neq) - 35.6, dB where: 85 is the mean sound exposure level (SEL) for a heavy truck arrival and departure (80 for medium trucks), and 10 * (log Neq) is 10 times the logarithm of the number of truck arrivals and departures during an hour, and 35.6 is 10 times the logarithm of the number seconds in an hour. 19 Based upon the above formula, the hourly Leq generated during the peak hour of truck activity with four heavy truck arrival/departure and unloading and four medium truck arrival/departure and unloading, would be approximately 56 dB Leq/L50, and 80 dB Lmax at a distance of 50 feet. Based upon the analysis, the loading docks would either need to be located a minimum distance of 160 feet from the nearest residential area, or include mitigation for shielding loading dock activities. On-Site Manufacturing and Industrial Noise Impact Methodology Parcels zoned for Manufacturing or Industrial uses are generally located in areas which are a considerable distance from any noise-sensitive uses, and adjacent to either S.R. 267 or the airport environs. However, these types of uses can have in noise sources and associated noise levels which exceed acceptable noise level criteria and can cause annoyance. Since no specific uses have been identified on the areas zoned for manufacturing or industrial use, it is difficult to determine specific impacts. j.c. brennan & associates, Inc. conducted reference noise level measurements for industrial facilities in the Yuba County Industrial Park. Noise measurements included operations at the Hanson Truss, Inc., American Wood Fibers, and Medallion Millwork sites. Sources measured included a combination of woodworking equipment (i.e., saws, routers, hammers, nail guns), vacuum units, mobile equipment (i.e., fork lifts, trucks), among other site-specific equipment. The reference noise level data indicated typical levels of 62 dB Leq, 58 dB L50 and 67 dB Lmax at a distance of 500 feet. Construction Noise Impact Assessment Methodology During the construction phases of the project, noise from construction activities would add to the noise environment in the immediate project vicinity. Noise levels from construction activities are expected to occur as part of the project development, and infrastructure improvements. Activities involved in construction would generate maximum noise levels, as indicated in Table 10, ranging from 76 to 90 dB at a distance of 50 feet. Construction activities would be temporary in nature and are anticipated to occur during normal daytime working hours. Noise would also be generated during the construction phase by increased truck traffic on area roadways. A significant project-generated noise source would be truck traffic associated with transport of heavy materials and equipment to and from construction sites. This noise increase would be of short duration, and would likely occur primarily during daytime hours. 20 Table 10 - Construction Equipment Noise Type of Equipment Maximum Level, dB at 50 feet Backhoe 78 Compactor 83 Compressor (air) 78 Concrete Saw 90 Dozer 82 Dump Truck 76 Excavator 81 Generator 81 Jackhammer 89 Pneumatic Tools 85 Source: Roadway Construction Noise Model User’s Guide. Federal Highway Administration. FHWA-HEP- 05-054. January 2006. Construction Vibration Impact Methodology The types of construction vibration impact include human annoyance and building structural damage. Human annoyance occurs when construction vibration rises significantly above the threshold of perception. Building damage can take the form of cosmetic or structural. Table 11 shows the typical vibration levels produced by construction equipment. Table 11 - Vibration Levels for Varying Construction Equipment Type of Equipment Peak Particle Velocity @ 25 feet Approximate Velocity Level (VdB) @ 25 feet Large Bulldozer 0.089 (inches/second) 87 (VdB) Loaded Trucks 0.076 (inches/second) 86 (VdB) Small Bulldozer 0.003 (inches/second) 58 (VdB) Auger/drill Rigs 0.089 (inches/second) 87 (VdB) Jackhammer 0.035 (inches/second) 79 (VdB) Vibratory Hammer 0.070 (inches/second) 85 (VdB) Vibratory Compactor/roller 0.210 (inches/second) 94 (VdB) Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment Guidelines, May 2006 21 SPECIFIC PROJECT IMPACTS AND MITIGATION MEASURES Exterior Traffic Noise Impacts at the Project Site Impact 1: Based upon the analysis, the predicted future traffic noise at residential zoned parcel would be less than 60 dB CNEL, the future traffic noise at the office, commercial and industrial zoned parcels would be less than 75 dB CNEL. Therefore, this is a less than significant impact: Mitigation for Impact 1: None Required Interior Traffic Noise Impacts on the Project Site for All Options Impact 2: Typical construction practices will result in an exterior to interior reduction in traffic noise levels of 20 dB to 25 dB. Predicted traffic noise levels at proposed residential uses are not expected to exceed 60 dBA CNEL. Therefore, interior noise levels are expected to comply with the 45 dBA CNEL standard. Therefore, this is a less than significant impact. Mitigation for Impact 2: None Required. Traffic Noise Impacts at Existing Residences Due to Increased Traffic from the Project Site Impact 3: Based upon the comparison of predicted increases in traffic noise associated with the project, and comparing those increases to the criteria contained in Table 7, the project will not result in a significant increase in overall traffic noise levels. Therefore, this is a less than significant impact. Mitigation for Impact 3: None Required. Truckee - Tahoe Airport Noise Impacts Impact 4: Based upon the locations of the Truckee-Tahoe Airport noise contours, none of the project site will be exposed to aircraft noise levels which exceed the Town of Truckee Noise Compatibility Guidelines. Therefore, this is a less than significant impact. Mitigation for Impact 4: None Required. On-Site Retail/Commercial Noise Source Impacts Impact 5: On-site truck traffic and loading dock activities could exceed the Development Code hourly noise level criteria at the existing residences located to the south and across S.R. 267. The peak hour of truck activity with four heavy truck arrivals/departure, and unloading and four medium truck arrivals/departures and unloading, would be approximately 56 dB L50 and 80 dB Lmax at a distance of 50 feet. This is a potentially significant impact. Mitigation for Impact 5: Implementation of the following noise mitigation measures would reduce this impact to a less than significant level. 22 Mitigation N1A: Loading docks and truck circulation routes should be located at a minimum of 160 feet from the residential uses. If these activities are located closer than 160 feet when tentative maps are prepared, a qualified acoustical consultant shall determine appropriate mitigation measures, including barrier heights and configurations, locating loading docks on the opposite sides of the buildings from the residential uses, enclosed loading docks, and depressed circulation routes and loading docks. On-Site Industrial and Manufacturing Noise Source Impacts Impact 6: Industrial and Manufacturing noise sources could exceed the Development Code hourly noise level criteria at the existing residences located to the south and across S.R. 267, and both existing and proposed residences to the west across S.R. 267. Noise levels could exceed the Development Code standards at distances up to 1,000 feet . This is a potentially significant impact. Mitigation for Impact 6: Implementation of the following noise mitigation measures would reduce this impact to a less than significant level. Mitigation N2A: New proposed uses located on lots zoned for Industrial and Manufacturing should have those projects designed to comply with the Development Code hourly noise level criteria. The projects should be evaluated by a qualified acoustical consultant to determine compliance and if required, recommend appropriate mitigation measures, including barrier heights and site configurations, time of day restrictions. Construction Noise Impacts Impact 7: Activities associated with construction on the project site and for roadway improvement projects will result in elevated noise levels within the immediate area. Activities involved in construction would typically generate maximum noise levels ranging from 85 to 90 dB at a distance of 50 feet. Construction activities could result in periods of elevated noise levels at existing residences. This impact is considered potentially significant. Mitigation for Impact 7: Implementation of the following noise mitigation measures would reduce this impact to a less than significant level. Mitigation N3A: Construction activities should adhere to the requirements of the Town of Truckee with respect to hours of operation, muffling of internal combustion engines, and other factors which affect construction noise generation and it=s effects on noise-sensitive land uses.  Equip all internal combustion engine driven equipment with intake and exhaust mufflers that are in good condition and appropriate for the equipment. 23  Locate stationary noise generating equipment as far as possible from sensitive receptors when sensitive receptors adjoin or are near a construction project area.  Utilize “quiet” air compressors and other stationary noise-generating equipment where appropriate technology exists.  The project sponsor shall designate a “disturbance coordinator” who would be responsible for responding to any local complaints about construction noise. The disturbance coordinator will determine the cause of the noise complaint and will require that reasonable measures warranted to correct the problem be implemented. The project sponsor shall also post telephone number for excessive noise complaints in conspicuous locations in the vicinity of the project site. Additionally, the project sponsor shall send a notice to neighbors in the project vicinity with the information on the construction schedule and the telephone number for noise complaints. Mitigation N3B: Construction activities should be restricted between the hours of 7 a.m. and 7 p.m. Monday through Friday, and between the hours of 8 a.m. and 7 p.m. on Saturdays. No construction activities should occur on Sundays and holidays. Construction Vibration Impacts Impact 8: Construction of the Proposed Project could result in temporarily vibration levels during construction. Although the impact may be noticeable at distances within 50 feet, the vibration levels are not expected to result in any type of structural damage. This would be a less than significant impact. Mitigation for Impact 8: None Required Cumulative Setting, Impacts, and Mitigation Measures Cumulative Setting The geographic extent of the cumulative setting for noise includes neighboring parcels which includes the State Park to the west, commercial to the north, single family residences to the east, as well as roadways affected by the proposed development, including portions of Donner Pass Road, Coldstream Road, Deerfield Drive, and Interstate 80. Cumulative development conditions for which the proposed project would contribute would primarily result from increased vehicular traffic on area roadways, as well as some noise sources associated with the commercial portion of the project site. Cumulative Impacts and Mitigation Measures Cumulative Increases in Ambient Noise Levels Cumulative Impact 1: Implementation of the proposed project, in combination with existing, approved, proposed, and reasonably foreseeable development, would not result in a substantial 24 contribution to exterior cumulative noise levels. This would be a less than cumulatively considerable impact. The project’s contribution to future cumulative exterior noise levels would be primarily associated with potential increases in vehicle traffic noise along area roadways and stationary noise sources associated with the commercial and industrial components of the project. Area roadways primarily affected by the proposed project include portions of S.R. 267, Donner Pass Road and Brockway Road. Predicted future cumulative exterior traffic noise levels with and without implementation of the proposed project are summarized in Tables 8 and 9. As depicted, implementation of the proposed project alternatives would result in projected increases ranging from 0 to 2 dB along these primarily affected roadway segments. Noise levels associated with the commercial, industrial and manufacturing portions of the project site will add to the background noise environment. The potential for this impact is specific to the nearest residences to the south and west of the site. However, based upon background noise measurements conducted on the site, and mitigation measures required to reduce overall noise levels associated with the on-site activities, the resulting increase in noise levels will be less than 3 dB. Therefore, the project’s contribution to noise increases in the cumulative setting area is considered less than cumulatively considerable. Mitigation Measure None required. Appendix A Acoustical Terminology Acoustics The science of sound. Ambient Noise The distinctive acoustical characteristics of a given space consisting of all noise sources 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 signal to approximate human response. Decibel or dB Fundamental unit of sound, A Bell is defined as the logarithm of the ratio of the sound pressure 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 with noise occurring during evening hours (7 - 10 p.m.) weighted by a factor of three and nighttime 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 per second 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. L(n) The sound level exceeded a described percentile over a measurement period. For instance, an hourly L50 is the sound level exceeded 50% of the time during the one hour period. Loudness A subjective term for the sensation of the magnitude of sound. Noise Unwanted sound. Peak Noise The level corresponding to the highest (not RMS) sound pressure measured over a given period of time. This term is often confused with the AMaximum@ level, which is the highest RMS level. RT60 The time it takes reverberant sound to decay by 60 dB once the source has been removed. Sabin The unit of sound absorption. One square foot of material absorbing 100% of incident sound has an absorption of 1 sabin. Threshold of Hearing The lowest sound that can be perceived by the human auditory system, generally considered to be 0 dB for persons with perfect hearing. Threshold of Pain Approximately 120 dB above the threshold of hearing. Impulsive Sound of short duration, usually less than one second, with an abrupt onset and rapid decay. Simple Tone Any sound which can be judged as audible as a single pitch or set of single pitches. Ap p e n d i x B Ho u r L e q L m a x L 5 0 L 9 0 0: 0 0 4 9 . 8 6 7 . 4 4 5 3 8 1: 0 0 5 0 . 5 6 7 . 2 4 4 3 8 H i g h L o w Ave r a g e H i g h L o w Average 2: 0 0 4 6 . 4 6 4 . 9 4 1 3 6 L e q ( A v e r a g e ) 62 . 3 5 6 . 0 5 9 . 8 5 9 . 4 4 6 . 4 5 3 . 8 3: 0 0 4 8 . 6 6 4 . 7 4 3 4 0 L m a x ( M a x i m u m ) 83 . 9 7 0 . 3 7 5 . 9 8 1 . 9 6 3 . 9 6 9 . 0 4: 0 0 5 0 . 2 6 5 . 1 4 5 4 1 L 5 0 ( M e d i a n ) 59 . 4 5 3 . 9 5 7 . 5 5 6 . 1 4 0 . 9 4 7 . 5 5: 0 0 5 3 . 6 7 3 . 3 5 0 4 3 L 9 0 ( B a c k g r o u n d ) 53 . 9 4 6 . 5 5 0 . 8 5 0 . 3 3 5 . 6 4 2 . 2 6: 0 0 5 9 . 4 8 1 . 9 5 6 5 0 7: 0 0 5 9 . 4 7 0 . 3 5 8 5 2 C o m p u t e d L d n , d B 6 1 . 7 8: 0 0 6 0 . 5 8 1 . 9 5 7 5 0 % D a y t i m e E n e r g y 8 7 % 9: 0 0 5 9 . 9 8 0 . 3 5 7 4 9 % N i g h t t i m e E n e r g y 13 % 10 : 0 0 5 9 . 6 7 2 . 9 5 7 5 0 11 : 0 0 6 0 . 3 8 2 . 2 5 8 5 0 12 : 0 0 5 9 . 0 7 5 . 7 5 7 5 0 13 : 0 0 5 9 . 8 7 7 . 2 5 8 5 2 14 : 0 0 6 0 . 9 7 3 . 2 5 9 5 4 15 : 0 0 6 0 . 4 7 0 . 3 5 9 5 4 16 : 0 0 6 0 . 5 7 4 . 8 5 9 5 3 17 : 0 0 6 2 . 3 8 3 . 9 5 9 5 3 18 : 0 0 5 9 . 1 7 1 . 5 5 8 5 1 19 : 0 0 5 8 . 3 7 6 . 5 5 7 4 9 20 : 0 0 5 7 . 3 7 4 . 1 5 5 4 9 21 : 0 0 5 6 . 0 7 4 . 1 5 4 4 6 22 : 0 0 5 5 . 8 7 2 . 8 5 3 4 7 23 : 0 0 53 . 8 6 3 . 9 5 2 4 7 PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 1 Da y t i m e ( 7 a . m . - 1 0 p . m . ) Fr i d a y , J u l y 1 6 , 2 0 1 0 St a t i s t i c a l S u m m a r y Ni g h t t i m e ( 1 0 p . m . - 7 a . m . ) Ld n = 61 .7 dB PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 1 Fr i d a y , J u l y 1 6 , 2 0 1 0 Ap p e n d i x B 20 . 0 30 . 0 40 . 0 50 . 0 60 . 0 70 . 0 80 . 0 90 . 0 12 A M 4 A M 8 A M 1 2 P M 4 P M 8 P M Ho u r o f D a y Sound Level, dB Le q Lm a x L5 0 L9 0 Ap p e n d i x B Ho u r L e q L m a x L 5 0 L 9 0 0: 0 0 5 1 . 4 6 2 . 8 4 8 4 2 1: 0 0 4 8 . 7 6 3 . 7 4 3 3 8 H i g h L o w Ave r a g e H i g h L o w Average 2: 0 0 4 6 . 6 6 1 . 6 4 3 3 7 L e q ( A v e r a g e ) 60 . 3 5 5 . 9 5 8 . 2 5 6 . 4 4 6 . 6 5 2 . 5 3: 0 0 4 8 . 7 6 9 . 0 4 3 3 7 L m a x ( M a x i m u m ) 82 . 0 6 7 . 4 7 3 . 5 8 1 . 7 6 1 . 6 6 7 . 2 4: 0 0 4 9 . 1 6 7 . 8 4 2 3 5 L 5 0 ( M e d i a n ) 58 . 7 5 2 . 7 5 5 . 8 5 3 . 0 4 2 . 4 4 6 . 6 5: 0 0 5 0 . 9 6 6 . 2 4 6 4 1 L 9 0 ( B a c k g r o u n d ) 52 . 0 4 5 . 2 4 8 . 2 4 6 . 7 3 4 . 8 4 0 . 6 6: 0 0 5 4 . 9 6 7 . 7 5 1 4 5 7: 0 0 5 7 . 1 7 7 . 8 5 3 4 5 C o m p u t e d L d n , d B 6 0 . 3 8: 0 0 5 8 . 0 7 5 . 1 5 5 4 6 % D a y t i m e E n e r g y 8 6 % 9: 0 0 5 7 . 1 6 7 . 4 5 5 4 6 % N i g h t t i m e E n e r g y 14 % 10 : 0 0 5 8 . 0 7 5 . 3 5 6 4 7 11 : 0 0 5 7 . 7 7 7 . 2 5 5 4 7 12 : 0 0 5 7 . 8 7 7 . 4 5 6 4 9 13 : 0 0 5 8 . 2 6 9 . 3 5 7 5 0 14 : 0 0 5 8 . 4 6 8 . 8 5 7 5 1 15 : 0 0 5 9 . 9 7 1 . 8 5 9 5 2 16 : 0 0 5 9 . 3 7 2 . 7 5 8 5 1 17 : 0 0 5 9 . 0 7 0 . 8 5 7 4 9 18 : 0 0 5 8 . 1 7 3 . 6 5 6 4 8 19 : 0 0 6 0 . 3 8 2 . 0 5 5 4 7 20 : 0 0 5 5 . 9 7 1 . 6 5 4 4 8 21 : 0 0 5 6 . 0 7 2 . 3 5 4 4 8 22 : 0 0 5 5 . 0 6 4 . 3 5 3 4 7 23 : 0 0 56 . 4 8 1 . 7 5 1 4 4 PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 1 Da y t i m e ( 7 a . m . - 1 0 p . m . ) Sa t u r d a y , J u l y 1 7 , 2 0 1 0 St a t i s t i c a l S u m m a r y Ni g h t t i m e ( 1 0 p . m . - 7 a . m . ) Ld n = 60 .3 dB PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 1 Sa t u r d a y , J u l y 1 7 , 2 0 1 0 Ap p e n d i x B 20 . 0 30 . 0 40 . 0 50 . 0 60 . 0 70 . 0 80 . 0 90 . 0 12 A M 4 A M 8 A M 1 2 P M 4 P M 8 P M Ho u r o f D a y Sound Level, dB Le q Lm a x L5 0 L9 0 Ap p e n d i x B Ho u r L e q L m a x L 5 0 L 9 0 0: 0 0 4 6 . 9 6 1 . 1 4 5 4 0 1: 0 0 4 5 . 7 5 8 . 9 4 3 3 8 H i g h L o w Ave r a g e H i g h L o w Average 2: 0 0 4 4 . 5 5 8 . 5 4 2 3 9 L e q ( A v e r a g e ) 56 . 4 4 6 . 6 5 1 . 2 5 7 . 1 4 4 . 5 5 1 . 2 3: 0 0 4 5 . 2 5 8 . 3 4 3 4 0 L m a x ( M a x i m u m ) 80 . 8 6 0 . 7 7 0 . 1 8 0 . 5 5 8 . 3 6 4 . 5 4: 0 0 4 8 . 3 6 7 . 7 4 5 4 2 L 5 0 ( M e d i a n ) 50 . 5 4 4 . 2 4 6 . 8 5 3 . 6 4 2 . 1 4 6 . 1 5: 0 0 5 7 . 1 8 0 . 5 4 9 4 5 L 9 0 ( B a c k g r o u n d ) 46 . 8 4 1 . 7 4 3 . 8 4 9 . 4 3 7 . 8 4 1 . 9 6: 0 0 5 5 . 0 6 9 . 0 5 4 4 9 7: 0 0 5 6 . 4 8 0 . 8 5 0 4 7 C o m p u t e d L d n , d B 5 7 . 6 8: 0 0 5 5 . 8 7 9 . 7 5 0 4 6 % D a y t i m e E n e r g y 6 2 % 9: 0 0 5 2 . 5 7 0 . 5 4 7 4 4 % N i g h t t i m e E n e r g y 38 % 10 : 0 0 4 9 . 8 6 8 . 5 4 6 4 2 11 : 0 0 5 1 . 3 7 5 . 6 4 5 4 2 12 : 0 0 4 7 . 5 7 1 . 9 4 4 4 2 13 : 0 0 4 7 . 4 6 0 . 9 4 6 4 4 14 : 0 0 4 7 . 9 6 8 . 4 4 5 4 3 15 : 0 0 4 6 . 8 6 0 . 7 4 6 4 4 16 : 0 0 4 8 . 3 6 9 . 5 4 6 4 4 17 : 0 0 4 6 . 6 6 2 . 2 4 6 4 3 18 : 0 0 4 9 . 2 7 5 . 4 4 5 4 3 19 : 0 0 4 7 . 8 6 1 . 2 4 7 4 3 20 : 0 0 5 0 . 9 7 0 . 0 4 8 4 4 21 : 0 0 5 1 . 7 7 6 . 4 4 9 4 6 22 : 0 0 4 8 . 5 6 2 . 2 4 7 4 3 23 : 0 0 48 . 6 6 4 . 1 4 6 4 1 PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 2 Da y t i m e ( 7 a . m . - 1 0 p . m . ) Mo n d a y , J u l y 1 9 , 2 0 1 0 St a t i s t i c a l S u m m a r y Ni g h t t i m e ( 1 0 p . m . - 7 a . m . ) Ld n = 57 .6 dB PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 2 Mo n d a y , J u l y 1 9 , 2 0 1 0 Ap p e n d i x B 20 . 0 30 . 0 40 . 0 50 . 0 60 . 0 70 . 0 80 . 0 90 . 0 12 A M 4 A M 8 A M 1 2 P M 4 P M 8 P M Ho u r o f D a y Sound Level, dB Le q Lm a x L5 0 L9 0 Ap p e n d i x B Ho u r L e q L m a x L 5 0 L 9 0 0: 0 0 4 4 . 1 6 0 . 6 4 1 3 7 1: 0 0 4 5 . 7 6 3 . 5 4 1 3 8 H i g h L o w Ave r a g e H i g h L o w Average 2: 0 0 4 6 . 0 5 8 . 5 4 5 4 1 L e q ( A v e r a g e ) 54 . 2 4 7 . 6 5 0 . 3 5 3 . 8 4 4 . 1 4 9 . 3 3: 0 0 4 4 . 6 5 9 . 9 4 2 3 9 L m a x ( M a x i m u m ) 72 . 6 5 9 . 7 6 8 . 4 6 7 . 9 5 8 . 5 6 2 . 2 4: 0 0 4 8 . 7 6 7 . 9 4 6 4 3 L 5 0 ( M e d i a n ) 52 . 2 4 4 . 7 4 7 . 6 5 3 . 0 4 1 . 4 4 6 . 2 5: 0 0 5 1 . 3 6 2 . 2 5 0 4 6 L 9 0 ( B a c k g r o u n d ) 48 . 5 4 1 . 9 4 4 . 8 4 9 . 6 3 7 . 1 4 2 . 6 6: 0 0 5 3 . 8 6 2 . 1 5 3 5 0 7: 0 0 5 4 . 2 7 1 . 0 5 2 4 9 C o m p u t e d L d n , d B 5 5 . 8 8: 0 0 5 1 . 1 6 7 . 0 4 9 4 6 % D a y t i m e E n e r g y 6 8 % 9: 0 0 5 1 . 3 7 2 . 6 4 8 4 5 % N i g h t t i m e E n e r g y 32 % 10 : 0 0 5 0 . 3 7 0 . 4 4 6 4 3 11 : 0 0 4 7 . 6 6 7 . 9 4 5 4 2 12 : 0 0 4 9 . 5 7 0 . 1 4 6 4 3 13 : 0 0 5 0 . 6 7 2 . 5 4 8 4 6 14 : 0 0 4 9 . 0 6 6 . 1 4 7 4 5 15 : 0 0 4 8 . 6 6 1 . 4 4 8 4 5 16 : 0 0 5 1 . 1 7 2 . 4 4 8 4 6 17 : 0 0 4 9 . 1 6 7 . 8 4 8 4 6 18 : 0 0 4 9 . 4 6 8 . 6 4 7 4 5 19 : 0 0 4 9 . 8 7 0 . 3 4 7 4 4 20 : 0 0 4 9 . 8 6 8 . 5 4 8 4 4 21 : 0 0 4 9 . 4 5 9 . 7 4 8 4 5 22 : 0 0 5 0 . 3 6 6 . 2 4 9 4 6 23 : 0 0 48 . 6 5 9 . 2 4 7 4 3 PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 2 Da y t i m e ( 7 a . m . - 1 0 p . m . ) Tu e s d a y , J u l y 2 0 , 2 0 1 0 St a t i s t i c a l S u m m a r y Ni g h t t i m e ( 1 0 p . m . - 7 a . m . ) Ld n = 55 .8 dB PC - 3 24 h r C o n t i n u o u s N o i s e M o n i t o r i n g - S i t e 2 Tu e s d a y , J u l y 2 0 , 2 0 1 0 Ap p e n d i x B 20 . 0 30 . 0 40 . 0 50 . 0 60 . 0 70 . 0 80 . 0 90 . 0 12 A M 4 A M 8 A M 1 2 P M 4 P M 8 P M Ho u r o f D a y Sound Level, dB Le q Lm a x L5 0 L9 0 Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : L d n Ha r d / S o f t : S o f t Se g m e n t R o a d w a y N a m e A D T D a y % E v e % N i g h t % % M e d . Tr u c k s % H v y . Tr u c k s SpeedDistanceOffset (dB) 1 D o n n e r P a s s 9 , 1 6 0 8 5 1 5 2 1 3 5 1 0 0 2 D o n n e r P a s s 9 , 9 0 0 8 5 1 5 2 1 2 5 1 0 0 3 D o n n e r P a s s 1 0 , 6 8 0 8 5 1 5 2 1 2 5 1 0 0 4 S R 2 6 7 1 2 , 9 1 0 8 5 1 5 2 1 5 5 1 0 0 5 S R 2 6 7 1 4 , 9 3 0 8 5 1 5 2 1 5 5 1 0 0 6 S R 2 6 7 1 4 , 4 8 0 8 5 1 5 2 1 5 5 1 0 0 7 S R 2 6 7 1 2 , 9 5 0 8 5 1 5 2 1 5 5 1 0 0 8 S R 2 6 7 1 1 , 3 0 0 8 5 1 5 2 1 5 5 1 0 0 9 S R 2 6 7 1 3 , 0 6 0 8 5 1 5 2 1 4 5 1 0 0 10 B r o c k w a y R d 9 , 4 5 0 8 5 1 5 2 1 3 5 1 0 0 11 B r o c k w a y R d 9 , 3 5 0 8 5 1 5 2 1 3 5 1 0 0 12 B r o c k w a y R d 1 2 , 4 9 0 8 5 1 5 2 1 4 5 1 0 0 13 B r o c k w a y R d 1 6 , 0 9 0 8 5 1 5 2 1 3 5 1 0 0 14 15 16 17 18 19 20 21 22 23 24 25 Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ap p e n d i x C 20 1 0 - 1 0 8 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l E x i s t i n g P C - 3 Da t a I n p u t S h e e t Br o c k w a y R d t o T o w n L i m i t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Me d i u m H e a v y Se g m e n t R o a d w a y N a m e Aut o s T r u c k s T r u c k s T o t a l 1 D o n n e r P a s s 5 8 . 0 5 0 . 8 5 3 . 0 6 0 2 D o n n e r P a s s 5 4 . 1 4 8 . 8 5 3 . 5 5 7 3 D o n n e r P a s s 5 4 . 4 4 9 . 2 5 3 . 8 5 8 4 S R 2 6 7 6 5 . 1 5 5 . 3 5 6 . 3 6 6 5 S R 2 6 7 6 5 . 7 5 6 . 0 5 6 . 9 6 7 6 S R 2 6 7 6 5 . 6 5 5 . 8 5 6 . 8 6 7 7 S R 2 6 7 6 5 . 1 5 5 . 4 5 6 . 3 6 6 8 S R 2 6 7 6 4 . 5 5 4 . 8 5 5 . 7 6 5 9 S R 2 6 7 6 2 . 6 5 4 . 0 5 5 . 5 6 4 10 B r o c k w a y R d 5 8 . 1 5 0 . 9 5 3 . 1 6 0 11 B r o c k w a y R d 5 8 . 0 5 0 . 9 5 3 . 1 6 0 12 B r o c k w a y R d 6 2 . 4 5 3 . 8 5 5 . 3 6 4 13 B r o c k w a y R d 6 0 . 4 5 3 . 2 5 5 . 4 6 2 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r E x i s t i n g P C - 3 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l Pr e d i c t e d L e v e l s Ap p e n d i x C 20 1 0 - 1 0 8 Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Se g m e n t R o a d w a y N a m e 7 5 7 0 6 5 6 0 5 5 1 D o n n e r P a s s 1 0 2 1 4 5 9 6 2 0 7 2 D o n n e r P a s s 7 1 5 3 1 6 8 1 4 5 3 D o n n e r P a s s 7 1 5 3 3 7 1 1 5 3 4 S R 2 6 7 2 5 5 4 1 1 7 2 5 2 5 4 3 5 S R 2 6 7 2 8 6 0 1 2 9 2 7 8 5 9 8 6 S R 2 6 7 2 7 5 9 1 2 6 2 7 2 5 8 6 7 S R 2 6 7 2 5 5 4 1 1 7 2 5 3 5 4 4 8 S R 2 6 7 2 3 5 0 1 0 7 2 3 1 4 9 7 9 S R 2 6 7 1 8 3 9 8 4 1 8 2 3 9 1 10 B r o c k w a y R d 1 0 2 1 4 6 9 8 2 1 1 11 B r o c k w a y R d 1 0 2 1 4 5 9 7 2 1 0 12 B r o c k w a y R d 1 8 3 8 8 2 1 7 6 3 8 0 13 B r o c k w a y R d 1 4 3 0 6 5 1 4 0 3 0 2 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l No i s e C o n t o u r O u t p u t Ap p e n d i x C 20 1 0 - 1 0 8 E x i s t i n g P C - 3 Se g m e n t D e s c r i p t i o n -- - - - - - - D i s t a n c e s t o T r a f f i c N o i s e C o n t o u r s - - - - - - - - Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : L d n Ha r d / S o f t : S o f t Se g m e n t R o a d w a y N a m e A D T D a y % E v e % N i g h t % % M e d . Tr u c k s % H v y . Tr u c k s SpeedDistanceOffset (dB) 1 D o n n e r P a s s 9 , 6 7 0 8 5 1 5 2 1 3 5 1 0 0 2 D o n n e r P a s s 1 0 , 0 9 0 8 5 1 5 2 1 2 5 1 0 0 3 D o n n e r P a s s 1 0 , 4 0 0 8 5 1 5 2 1 2 5 1 0 0 4 S R 2 6 7 1 7 , 1 7 0 8 5 1 5 2 1 5 5 1 0 0 5 S R 2 6 7 1 5 , 6 2 0 8 5 1 5 2 1 5 5 1 0 0 6 S R 2 6 7 1 5 , 1 8 0 8 5 1 5 2 1 5 5 1 0 0 7 S R 2 6 7 1 3 , 8 3 0 8 5 1 5 2 1 5 5 1 0 0 8 S R 2 6 7 1 2 , 0 1 0 8 5 1 5 2 1 5 5 1 0 0 9 S R 2 6 7 1 3 , 3 7 0 8 5 1 5 2 1 4 5 1 0 0 10 B r o c k w a y R d 1 5 , 6 8 0 8 5 1 5 2 1 3 5 1 0 0 11 B r o c k w a y R d 1 3 , 0 7 0 8 5 1 5 2 1 3 5 1 0 0 12 B r o c k w a y R d 1 4 , 1 2 0 8 5 1 5 2 1 4 5 1 0 0 13 B r o c k w a y R d 1 7 , 1 2 0 8 5 1 5 2 1 3 5 1 0 0 14 15 16 17 18 19 20 21 22 23 24 25 Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ap p e n d i x C 20 1 0 - 1 0 8 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l E x i s t i n g + P r o j e c t P C - 3 Da t a I n p u t S h e e t Br o c k w a y R d t o T o w n L i m i t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Me d i u m H e a v y Se g m e n t R o a d w a y N a m e Aut o s T r u c k s T r u c k s T o t a l 1 D o n n e r P a s s 5 8 . 2 5 1 . 0 5 3 . 2 6 0 2 D o n n e r P a s s 5 4 . 2 4 8 . 9 5 3 . 5 5 8 3 D o n n e r P a s s 5 4 . 3 4 9 . 1 5 3 . 7 5 8 4 S R 2 6 7 6 6 . 3 5 6 . 6 5 7 . 5 6 7 5 S R 2 6 7 6 5 . 9 5 6 . 2 5 7 . 1 6 7 6 S R 2 6 7 6 5 . 8 5 6 . 0 5 7 . 0 6 7 7 S R 2 6 7 6 5 . 4 5 5 . 6 5 6 . 6 6 6 8 S R 2 6 7 6 4 . 8 5 5 . 0 5 6 . 0 6 6 9 S R 2 6 7 6 2 . 7 5 4 . 1 5 5 . 6 6 4 10 B r o c k w a y R d 6 0 . 3 5 3 . 1 5 5 . 3 6 2 11 B r o c k w a y R d 5 9 . 5 5 2 . 3 5 4 . 5 6 1 12 B r o c k w a y R d 6 3 . 0 5 4 . 4 5 5 . 9 6 4 13 B r o c k w a y R d 6 0 . 7 5 3 . 5 5 5 . 7 6 2 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r E x i s t i n g + P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l Pr e d i c t e d L e v e l s Ap p e n d i x C 20 1 0 - 1 0 8 Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Se g m e n t R o a d w a y N a m e 7 5 7 0 6 5 6 0 5 5 1 D o n n e r P a s s 1 0 2 1 4 6 1 0 0 2 1 5 2 D o n n e r P a s s 7 1 5 3 2 6 8 1 4 7 3 D o n n e r P a s s 7 1 5 3 2 7 0 1 5 0 4 S R 2 6 7 3 0 6 6 1 4 1 3 0 5 6 5 7 5 S R 2 6 7 2 9 6 2 1 3 3 2 8 6 6 1 7 6 S R 2 6 7 2 8 6 0 1 3 0 2 8 1 6 0 5 7 S R 2 6 7 2 6 5 7 1 2 2 2 6 4 5 6 8 8 S R 2 6 7 2 4 5 2 1 1 1 2 4 0 5 1 7 9 S R 2 6 7 1 8 4 0 8 6 1 8 4 3 9 7 10 B r o c k w a y R d 1 4 3 0 6 4 1 3 8 2 9 6 11 B r o c k w a y R d 1 2 2 6 5 7 1 2 2 2 6 3 12 B r o c k w a y R d 1 9 4 1 8 9 1 9 1 4 1 2 13 B r o c k w a y R d 1 5 3 1 6 8 1 4 6 3 1 4 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l No i s e C o n t o u r O u t p u t Ap p e n d i x C 20 1 0 - 1 0 8 E x i s t i n g + P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n -- - - - - - - D i s t a n c e s t o T r a f f i c N o i s e C o n t o u r s - - - - - - - - Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : L d n Ha r d / S o f t : S o f t Se g m e n t R o a d w a y N a m e A D T D a y % E v e % N i g h t % % M e d . Tr u c k s % H v y . Tr u c k s SpeedDistanceOffset (dB) 1 D o n n e r P a s s 1 1 , 6 1 0 8 5 1 5 2 1 3 5 1 0 0 2 D o n n e r P a s s 1 2 , 4 8 0 8 5 1 5 2 1 2 5 1 0 0 3 D o n n e r P a s s 7 , 3 0 0 8 5 1 5 2 1 2 5 1 0 0 4 S R 2 6 7 2 3 , 7 6 0 8 5 1 5 2 1 5 5 1 0 0 5 S R 2 6 7 2 8 , 6 9 0 8 5 1 5 2 1 5 5 1 0 0 6 S R 2 6 7 2 8 , 3 2 0 8 5 1 5 2 1 5 5 1 0 0 7 S R 2 6 7 2 3 , 3 1 0 8 5 1 5 2 1 5 5 1 0 0 8 S R 2 6 7 2 2 , 3 7 0 8 5 1 5 2 1 5 5 1 0 0 9 S R 2 6 7 1 5 , 0 5 0 8 5 1 5 2 1 4 5 1 0 0 10 B r o c k w a y R d 1 4 , 0 1 0 8 5 1 5 2 1 3 5 1 0 0 11 B r o c k w a y R d 1 3 , 8 2 0 8 5 1 5 2 1 3 5 1 0 0 12 B r o c k w a y R d 1 7 , 1 2 0 8 5 1 5 2 1 4 5 1 0 0 13 B r o c k w a y R d 2 2 , 3 2 0 8 5 1 5 2 1 3 5 1 0 0 14 15 16 17 18 19 20 21 22 23 24 25 Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ap p e n d i x C 20 1 0 - 1 0 8 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l F u t u r e N o P r o j e c t P C - 3 Da t a I n p u t S h e e t Br o c k w a y R d t o T o w n L i m i t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Me d i u m H e a v y Se g m e n t R o a d w a y N a m e Aut o s T r u c k s T r u c k s T o t a l 1 D o n n e r P a s s 5 9 . 0 5 1 . 8 5 4 . 0 6 1 2 D o n n e r P a s s 5 5 . 1 4 9 . 9 5 4 . 5 5 8 3 D o n n e r P a s s 5 2 . 8 4 7 . 5 5 2 . 1 5 6 4 S R 2 6 7 6 7 . 7 5 8 . 0 5 8 . 9 6 9 5 S R 2 6 7 6 8 . 6 5 8 . 8 5 9 . 7 6 9 6 S R 2 6 7 6 8 . 5 5 8 . 8 5 9 . 7 6 9 7 S R 2 6 7 6 7 . 7 5 7 . 9 5 8 . 8 6 9 8 S R 2 6 7 6 7 . 5 5 7 . 7 5 8 . 7 6 8 9 S R 2 6 7 6 3 . 3 5 4 . 6 5 6 . 1 6 4 10 B r o c k w a y R d 5 9 . 8 5 2 . 6 5 4 . 8 6 2 11 B r o c k w a y R d 5 9 . 7 5 2 . 6 5 4 . 8 6 2 12 B r o c k w a y R d 6 3 . 8 5 5 . 2 5 6 . 7 6 5 13 B r o c k w a y R d 6 1 . 8 5 4 . 7 5 6 . 8 6 4 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r F u t u r e N o P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l Pr e d i c t e d L e v e l s Ap p e n d i x C 20 1 0 - 1 0 8 Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Se g m e n t R o a d w a y N a m e 7 5 7 0 6 5 6 0 5 5 1 D o n n e r P a s s 1 1 2 4 5 2 1 1 3 2 4 3 2 D o n n e r P a s s 8 1 7 3 7 7 9 1 7 0 3 D o n n e r P a s s 6 1 2 2 6 5 5 1 1 9 4 S R 2 6 7 3 8 8 2 1 7 6 3 7 9 8 1 5 5 S R 2 6 7 4 3 9 2 1 9 9 4 2 9 9 2 5 6 S R 2 6 7 4 3 9 2 1 9 8 4 2 6 9 1 7 7 S R 2 6 7 3 7 8 1 1 7 3 3 7 4 8 0 5 8 S R 2 6 7 3 6 7 8 1 6 9 3 6 4 7 8 3 9 S R 2 6 7 2 0 4 3 9 3 2 0 0 4 3 0 10 B r o c k w a y R d 1 3 2 7 5 9 1 2 8 2 7 5 11 B r o c k w a y R d 1 3 2 7 5 9 1 2 6 2 7 2 12 B r o c k w a y R d 2 2 4 7 1 0 1 2 1 7 4 6 8 13 B r o c k w a y R d 1 7 3 8 8 1 1 7 4 3 7 5 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l No i s e C o n t o u r O u t p u t Ap p e n d i x C 20 1 0 - 1 0 8 F u t u r e N o P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n -- - - - - - - D i s t a n c e s t o T r a f f i c N o i s e C o n t o u r s - - - - - - - - Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : L d n Ha r d / S o f t : S o f t Se g m e n t R o a d w a y N a m e A D T D a y % E v e % N i g h t % % M e d . Tr u c k s % H v y . Tr u c k s SpeedDistanceOffset (dB) 1 D o n n e r P a s s 1 3 , 6 0 0 8 5 1 5 2 1 3 5 1 0 0 2 D o n n e r P a s s 1 2 , 4 5 0 8 5 1 5 2 1 2 5 1 0 0 3 D o n n e r P a s s 7 , 0 9 0 8 5 1 5 2 1 2 5 1 0 0 4 S R 2 6 7 2 9 , 5 4 0 8 5 1 5 2 1 5 5 1 0 0 5 S R 2 6 7 2 9 , 1 4 0 8 5 1 5 2 1 5 5 1 0 0 6 S R 2 6 7 2 8 , 7 7 0 8 5 1 5 2 1 5 5 1 0 0 7 S R 2 6 7 2 4 , 0 8 0 8 5 1 5 2 1 5 5 1 0 0 8 S R 2 6 7 2 3 , 0 5 0 8 5 1 5 2 1 5 5 1 0 0 9 S R 2 6 7 1 5 , 2 4 0 8 5 1 5 2 1 4 5 1 0 0 10 B r o c k w a y R d 2 0 , 3 7 0 8 5 1 5 2 1 3 5 1 0 0 11 B r o c k w a y R d 1 5 , 8 9 0 8 5 1 5 2 1 3 5 1 0 0 12 B r o c k w a y R d 1 7 , 7 1 0 8 5 1 5 2 1 4 5 1 0 0 13 B r o c k w a y R d 2 2 , 4 6 0 8 5 1 5 2 1 3 5 1 0 0 14 15 16 17 18 19 20 21 22 23 24 25 Ma r t i s V a l l e y R d t o P a l i s a d e s D r Pa l i s a d e s D r t o W e s t R i v e r R d To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ap p e n d i x C 20 1 0 - 1 0 8 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l F u t u r e W i t h P r o j e c t P C - 3 Da t a I n p u t S h e e t Br o c k w a y R d t o T o w n L i m i t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Me d i u m H e a v y Se g m e n t R o a d w a y N a m e Aut o s T r u c k s T r u c k s T o t a l 1 D o n n e r P a s s 5 9 . 7 5 2 . 5 5 4 . 7 6 1 2 D o n n e r P a s s 5 5 . 1 4 9 . 8 5 4 . 5 5 8 3 D o n n e r P a s s 5 2 . 6 4 7 . 4 5 2 . 0 5 6 4 S R 2 6 7 6 8 . 7 5 8 . 9 5 9 . 9 7 0 5 S R 2 6 7 6 8 . 6 5 8 . 9 5 9 . 8 7 0 6 S R 2 6 7 6 8 . 6 5 8 . 8 5 9 . 8 7 0 7 S R 2 6 7 6 7 . 8 5 8 . 0 5 9 . 0 6 9 8 S R 2 6 7 6 7 . 6 5 7 . 9 5 8 . 8 6 9 9 S R 2 6 7 6 3 . 3 5 4 . 7 5 6 . 2 6 5 10 B r o c k w a y R d 6 1 . 4 5 4 . 3 5 6 . 4 6 3 11 B r o c k w a y R d 6 0 . 3 5 3 . 2 5 5 . 4 6 2 12 B r o c k w a y R d 6 4 . 0 5 5 . 4 5 6 . 8 6 5 13 B r o c k w a y R d 6 1 . 9 5 4 . 7 5 6 . 9 6 4 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r F u t u r e W i t h P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l Pr e d i c t e d L e v e l s Ap p e n d i x C 20 1 0 - 1 0 8 Ld n So f t Pr o j e c t # : De s c r i p t i o n : Ld n / C N E L : Ha r d / S o f t : Se g m e n t R o a d w a y N a m e 7 5 7 0 6 5 6 0 5 5 1 D o n n e r P a s s 1 3 2 7 5 8 1 2 5 2 7 0 2 D o n n e r P a s s 8 1 7 3 7 7 9 1 7 0 3 D o n n e r P a s s 5 1 2 2 5 5 4 1 1 6 4 S R 2 6 7 4 4 9 4 2 0 3 4 3 8 9 4 3 5 S R 2 6 7 4 3 9 3 2 0 1 4 3 4 9 3 4 6 S R 2 6 7 4 3 9 3 2 0 0 4 3 0 9 2 6 7 S R 2 6 7 3 8 8 2 1 7 7 3 8 2 8 2 3 8 S R 2 6 7 3 7 8 0 1 7 2 3 7 1 7 9 9 9 S R 2 6 7 2 0 4 3 9 3 2 0 1 4 3 3 10 B r o c k w a y R d 1 6 3 5 7 6 1 6 4 3 5 3 11 B r o c k w a y R d 1 4 3 0 6 4 1 3 9 2 9 9 12 B r o c k w a y R d 2 2 4 8 1 0 3 2 2 2 4 7 9 13 B r o c k w a y R d 1 7 3 8 8 1 1 7 5 3 7 7 Pa l i s a d e s D r t o W e s t R i v e r R d S. o f I - 8 0 E a s t I n t e r c h a n g e Ea s t o f B r i d g e S t r e e t We s t o f B r i d g e S t r e e t I- 8 0 t o B r o c k w a y R o a d Br o c k w a y R d t o T o w n L i m i t To w n L i m i t t o A i r p o r t R o a d Ai r p o r t R o a d t o N o r t h s t a r D r No r t h s t a r D r i v e t o S u m m i t Su m m i t t o S R 2 8 SR 2 6 7 t o P r o j e c t A c c e s s Pr o j e c t A c c e s s t o M a r t i s V a l l e y R d Ma r t i s V a l l e y R d t o P a l i s a d e s D r FH W A - R D - 7 7 - 1 0 8 H i g h w a y T r a f f i c N o i s e P r e d i c t i o n M o d e l No i s e C o n t o u r O u t p u t Ap p e n d i x C 20 1 0 - 1 0 8 F u t u r e W i t h P r o j e c t P C - 3 Se g m e n t D e s c r i p t i o n -- - - - - - - D i s t a n c e s t o T r a f f i c N o i s e C o n t o u r s - - - - - - - - Ld n So f t