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JON GRAVES ARCHITECTS & PLANNERS, PLLC
3110 Ruston Way, Suite E
Tacoma, WA 98402
October 25, 2019
Community & Economic Development – Planning Division
Renton City Hall, 6th Floor
1055 South Grady Way
Renton, WA 98057
REGARDING: Site Plan Review - Sunset Highlands Mixed Use – Construction Mitigation Description
In an effort to provide tactical construction impact mitigation, the following plan describes not only the major
components of the project but mitigation measures that will be in place to minimize the projects impacts on the
environment and community as a whole:
Construction Dates:
The project is estimated to begin in May 2020 with an overall timeline of 10 months from the breaking ground
ceremony to the final acceptance of the project by the governing authorities and the owner.
Construction Hours and Days of Operation:
The project will be completed Monday through Friday with some minor activities being done on some Saturdays to
avoid delays and complications.
The construction gate will open at 6:00 am and the equipment on site will be turned on at 7:00 am to warm-up
with operations starting at 7:15 am. The workforce on the project will arrive on the site between 6:00 am and 7:00
am with rollout beginning at 7:00 am.
The construction gate will close at 6:00 pm and all equipment will be stopped and shut down by 5:00 pm. The
workforce on the project will begin roll-up at 4:00 pm with all work stopping no later than 5:00 pm.
The site will always have security fencing in place and the site will be locked during non-construction hours.
Construction access will be controlled, and all visitors must report to the construction office and must have the
appropriate safety protection (boots, hard hat and safety glasses) to walk the site.
Hauling and Transportation Routes:
Most common commuting will be done via I-405 to NE Sunset Boulevard, East to the site. Major Trucking and
Hauling will follow two common traffic routes:
· I-405 to NE Sunset Boulevard, East to the site
· I-405 to NE 4th Street, East to Duvall Avenue NE, North to NE Sunset Boulevard, West to the site
The total travel time from I-405 to the site is 5-7 minutes using either route.
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Mitigation and Control of Impacts on the Surrounding Community:
The site will be watered during times when dust reaches a level that is disturbing to the surrounding areas in the
morning and in the late afternoon or as needed to reduce transient dust from escaping the site and lingering to
surrounding areas.
The perimeter of the site will have filter fabric fence installed to gather and hold all debris, spoils and “dirty” water
from leaving the site without being controlled.
Soil and Landscaping materials that are collected and/or gathered in amounts exceeding 2 cubic yards will be
covered with Visqueen and sandbags to minimize erosion.
During heavy hauling or site delivery times, licensed and independently contracted road crews and flagging
companies will be used to control traffic flow to and from the site. Each activity that requires traffic flow control
will be applied for to the governing authorities and a site control and access plan will be approved. At times when
traffic is heightened due to area activities, the local law enforcement agency may be contracted to ensure the
safety of the community, and all vehicles leaving the site will enter and leave the flow of traffic in a safe and
controlled manner.
The site will have crushed rock and tire gravel at the construction entrance to minimize the impact on NE Sunset
Boulevard. All dirt or debris tracked on to NE Sunset Boulevard will be addressed with a contracted Street Cleaning
service.
The site will have times that noise will exceed common day practices on typical adjacent properties, but the
activities that will affect the community with noise pollution the most will be controlled based on the times that
the work will be taking place and the amount of work being done at any one time. The activities will not be
grouped together and will be spread out to minimize the effect on local businesses and properties. All generators,
compressors and heavy equipment will be inspected to ensure that all current WISHA measures for sound
extenuation have been adhered to.
All gases, chemicals and toxins will be controlled on site in a single area and will be locked and sealed at all times
while they are not being used. The items will be properly placarded, and Material Safety Data Sheets will be on
site for each item at all times. Secured and Safe Lockers and/or Storage Bins will always be used with a properly
developed perimeter to ensure the safety of the items on the site.
TYPES OF MITIGATION MEASURES THAT MAY BE REQUIRED:
· Physical Impacts:
Traffic detours, temporary sidewalks, construction coordination meetings
· Environmental Impacts:
Pressure washing sidewalks and driveways
Thank you,
Ben Childs | Senior Project Manager
JON GRAVES ARCHITECTS