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architecture | interiors
August 3, 2017
Conditional Use Permit Application
Construction Mitigation Description
Project Name and Location
King County AFIS Laboratory Replacement
Black River Building (existing King County office building)
900 Oakesdale Avenue SW
Renton, WA 98057
1. Proposed Construction Dates
Construction begins on site: February 1, 2018
Construction complete: October 1, 2018
2. Hours and Days of Operation
Primary: 7:00 AM - 5:00 PM, Monday – Friday
Occasional: Saturday 7:00 AM - 5:00 PM, to minimize specific construction impacts on other Black
River Building tenants for certain activities such as parking lot paving, utility shutdowns, etc.
3. Proposed Hauling/Transportation Routes
Construction material transportation will enter the site through a specified existing access from Seventh
Street, and will be transported through the existing site. No materials or equipment of significant size or
weight will be required by this project.
4. Measures to be implemented to minimize dust, traffic and transportation impacts, erosion, mud,
noise and other noxious characteristics
Excavation and construction of an augur-cast piling system will be required for the 3,056 square foot
Vehicle Inspection Facility. The Contractor will be required to comply with all State, King County and City
dust and noise control requirements through the project specifications and regular oversight by the
County construction manager and the project architect.
Dust control measures:
a. Use of water mist and other suitable methods to limit spread of dust and dirt.
b. Use of street sweeping equipment to limit dirt tracking from construction equipment.
c. Prohibition of visible emissions of dust from the construction site, including sprinklering.
d. Covering truckloads to prevent the escape of dust-bearing materials.
e. Control of silica dust generation during concrete work.
Traffic and transportation impacts:
a. This is a relatively small project. No significant volume of truck traffic is anticipated.
b. Whenever possible, material deliveries will be scheduled during hours before or after normal
business hours in this commercial occupancy neighborhood.
c. The contractor will be required to provide flaggers for materials and equipment deliveries when
appropriate.
King County AFIS Lab
900 Oakesdale Avenue SW
Construction Mitigation Description
1520 fourth avenue suite 400 seattle wa 98101 | 206 467-6306 | buffalodesign.com | page 2 of 2
Erosion and Mud:
a. Because of the small scope and location of the proposed building addition, there is a relatively small
risk of erosion. A temporary erosion control plan and details are included in this submittal for City
approval and the contractor will be required to comply with all applicable requirements.
Noise:
a. The project site is surrounded by office and business uses that are generally not occupied on the
weekend. Activities that produce significant noise such as pavement demolition and excavation will
be scheduled for daytime hours on weekends.
b. Night time exterior work activities are not anticipated to be necessary to meet the project schedule.
A preliminary traffic control plan is included in this submittal.
No tower cranes will be used for this project. Hoisting mechanical equipment to the roof of the existing
building will require a day use mobile crane for a period of three or four days. This construction activity
will be scheduled in coordination with the City.