Loading...
HomeMy WebLinkAboutNoise Monitoring Plan Final_10_31_16) I-405 / SR 167 Direct Connector PROJECT NOISE MONITORING PLAN FOR NIGHTTIME CONSTRUCTION Submitted to: Jennifer Henning, AICP Planning Director City of Renton Planning Division INTRODUCTION Beginning in November 2016 through November 2019, the Washington State Department of Transportation (WSDOT) will construct interchange improvements in the City of Renton. The Project begins at Mile Post 24.5 on SR 167, and ends at Mile Post 4.3 on I-405. The length of the project segment is approximately 2.4 miles. See vicinity map in Figure 1. WSDOT has applied for 840 consecutive or non-consecutive nights of variation from the City of Renton Municipal Code for noise levels expected to result from construction work between the hours of 8:00 PM and 5:00 AM. The goal of this memorandum is to outline a noise monitoring plan. Figure 1: Project Vicinity Map The plan is to measure the noise from construction activities as they begin, and compare those to ambient and planned noise levels. This plan also describes how WSDOT will proceed once the complaint is received on the noise hotline. The project area consists of the following type of land uses: i) Commercial Office ii) Medium Industrial iii) Commercial Downtown iv) Commercial Arterial v) Residential du/ac vi) Residential Multi-Family The noise levels due to construction activities will not be continuous depending on the type of work (stationary such as pavement repair or mobile operations such as paving or pavement marking placement) and the location of the work zone along the roughly two miles of work. Residents may receive construction noise from equipment depending on if they are located behind an existing noise wall and how far they are located from the edge of pavement MONITORING PLAN The proposed monitoring plan consists of four phases: 1. Contract plan nighttime mitigation specifications. 2. Pre-Construction ambient noise measurements. 3. Activity Startup noise measurements. 4. Possible Nighttime Construction residents’ notification 5. Nighttime noise complaint response protocol 1. CONTRACT PLAN NIGHTTIME MITIGATION SPECIFICATIONS Noise mitigation special conditions submitted with the application are included in the project’s noise variance application. Mitigation measures will be followed by WSDOT and its Design Builder. All activities will be conducted in compliance with the conditions as set forth in the Variance. Please see mitigation steps listed in the narrative and other attachments to the variance application. 2. PRE-CONSTRUCTION AMBIENT NOISE MEASUREMENTS A log of noise measurements will be created. Pre-construction ambient noise measurements will be taken along the length of the alignment, and documented on the log. A blank copy of the log is attached for reference. 3. ACTIVITY STARTUP NOISE MEASUREMENTS Once a new nighttime construction activity that has potential to create high noise levels begins, measurements will be taken at 50 and 100 ft from the source to compare it to those expected from that particular activity. Anticipated construction activities and their expected noise generation are listed in the noise variance request. 4. POSSIBLE NIGHTTIME CONSTRUCTION RESIDENTS’ NOTIFICATION Atkinson Construction will provide citizens with a 425-240-0717 noise hotline for construction noise related complaints. All complaints will be logged and responded to with by phone or email within 24 hours of when they are received by Atkinson Construction. 5. NIGHTTIME NOISE COMPLAINT RESPONSE PROTOCOL If a noise complaint is received during the nighttime work operation, WSDOT will conduct the following noise level measurements: A. Baseline Highway background field Measurements Ambient traffic noise in the vicinity of the noise complaint will be taken, and recorded on the log. If the work is not going on when the complaint is received, noise measurements will be taken the following night or same time the next day that the complaint was received. B. Monitoring in Response to Complaints Noise level measurements will be taken outside of the property where the complaint was received. The noise reading will be taken during the construction activity which resulted in the complaint. All measurements and response complaint forms summary will be logged into a spreadsheet and submitted to the City. C. Complaint response protocol The WSDOT complaint response protocol proposed for this project is detailed as follows: 1. Upon the first complaint, Atkinson Construction will ensure that all mitigation measures are being enforced and to attempt to reduce any unnecessarily loud work practices. 2. Atkinson Construction will provide residents with industrial grade earplugs by mail or by hand-delivery. Atkinson Construction will follow up on earplug effectiveness within two days. 3. If earplugs are not effective in reducing nighttime disturbances from grinding noise, residents are eligible to borrow a white noise generator from Atkinson Construction. Residents must sign a receipt acknowledging full responsibility for replacing the machine in-kind if it is lost or damaged. Atkinson Construction is responsible for collecting the white noise generator following completion of the project. Machines are intended to be used in the bedroom to mask construction noise. Multiple machines may be available for a single household depending on the number of occupied bedrooms where sleep is disturbed by night construction noise. White noise generators can be used in combination with earplugs. 4. If the white noise generators are not effective in reducing nighttime disturbances, residents may be eligible to receive motel vouchers from Atkinson Construction for a nearby motel if the combination of earplugs and white noise generator(s) are not effective at a particular location. Motel vouchers are in the form of a reservation confirmation number that includes the number of eligible occupants as determined by the project schedule and location. The nightly rate may not exceed the allowable state lodging rate. Atkinson Construction will determine the duration of nights based on our construction schedule, and how much construction noise we expect at the home.