HomeMy WebLinkAboutEx10_Staff_PowerPoint_200818I-405 Renton to Bellevue
Express Toll Lanes Project -
Noise Variance
LUA20-000147, V-H
Clark H. Close, Senior Planner
cclose@rentonwa.gov
425-430-7289
August 18, 2020
Start Project
Renton-Newcastle
City Limits
End Project
Renton-Tukwila
City Limits
Brief Description
•WSDOT is requesting a noise variance from RMC 8-7-2 to widen I-405 through
Renton by a single lane in each direction, make improvements at the NE 44th St
interchange, replace the May Creek Bridge, and correct fish passage barriers across
I-405 in the vicinity of Exit 7.
•The project seeks to address capacity and mobility improvements to the public and
users.
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Lake Washington
•Approx. 500 to 600 nights of non-
consecutive nighttime work would
be required between now and the
completion of the project
(12/31/2024).
•Minimize daytime traffic congestion
along the I-405 corridor.
Brief Description
•The work will be conducted within the
State’s Limited Access Right-of-Way along
I-405.
•Work activities –
•Clearing and grading, paving,
relocation of guardrail and jersey
barrier, fish passage culvert
installation, bridge demolition and
construction, drainage installation,
construction of new stormwater
facilities, restoration of disturbed
areas, and landscaping.
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Brief Description
•Major items of work –
•Renton Hill Area: S 3rd St/Renton Ave S Bridge Retrofit
•I-405 and SR 169 (Maple Valley Highway) Interchange/Ramp
Improvements
•I-405 and SR900 Interchange/Ramp Improvements
•I-405 and NE 30th St Interchange/Ramp Improvements
•I-405 and NE 44th St Interchange/Road Improvements and Ramp
Improvements
•Adding Through Lanes
•Build Retaining Walls and Noise Walls
•Upgrade Drainage, Utilities Relocation and Detention Ponds
•Rebuild ITS Systems
•Additional Safety Items (Including, but not limited to, pedestrian and
trail improvements, ADA access, and landscaping.)
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Zoning
•The zoning along the construction corridor
consists of RC, R-1, R-4, R-6, R-8, RMF, IH,
CN, CA, CD, CO, COR, and UC.
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WAC 173-60-040
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Equipment Sound Level
(dBA)at 50 ft
dBA at
100 ft
dBA at
200 ft
dBA at
300 ft
Planing Grinder/Milling Machine 84 81 78 76
Vacuum Truck 86 80 74 70
Boom Truck with Auger 88 82 76 72
Excavator Cat 349 with Breaker 86 80 74 70
Fork Lift 88 85 82 81
Concrete Pump Truck 83 77 71 68
Jackhammers 91 85 79 75
Construction Equipment
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Examples of Construction Equipment used during the night time operations:
Construction Equipment
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Residents along I-405 would perceive construction sounds at various decibel
levels due to varying distances, topography (berms or elevations changes),
and other features (noise wall) that break the line of sight.
Factors For Granting Variance
1)Implementation of a noise monitoring program;
2)Maximum noise levels;
3)Limitation on types of equipment and use of particular equipment;
4)Limitation on back-up beepers for equipment;
5)Required use of noise shields or barriers;
6)Restrictions to specific times and days;
7)Specific requirements for documentation of compliance with the noise variance
conditions;
8)Specific requirements for notification to nearby residents;
9)Required cash security to pay for inspection services to verify compliance;
10)Required access to the project by the City to verify compliance with the noise
variance conditions;
11)Specific program to allow for temporary hotel vouchers to affected residents;
12)Requirements for written verification that all workers understand the noise
variance conditions for the project; and
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RMC 8-7-8.D.4:
13)Provision allowing the City to immediately revoke the variance approval
if the variance conditions are violated.
Recommendation
Staff recommends approval of the I-405 Renton to Bellevue Express Toll
Lanes Project -Noise Variance, File No. LUA20-000147, V-H, as depicted
in the Site Plan (Exhibit 2), subject to 2 conditions of approval.
1.The Applicant and the Design Build Contractor shall implement
the noise mitigation measures for granting a variance to
diminish or eliminate noise during the Renton to Bellevue
Express Toll Lanes Project, as described in the project narrative
(Exhibit 7). A summary of any noise-related complaints received
and the response provided shall be provided to the City’s
project manager within one week of receiving the complaint.
2.The applicant shall post night time work on the WSDOT
Web/Internet site so residents have digital access to
information that the City of Renton might see as appropriate.
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