HomeMy WebLinkAboutEx13_Construction_Mitigation_DescriptionKing County WTD -1- Loop Compost Pilot Project
Loop Compost Pilot Project
Request for City of Renton Temporary Use Permit
Construction Mitigation Description
King County Wastewater Treatment Division (WTD) is submitting a request for a Temporary Use Permit
(TUP) to construct and operate the Loop® Compost Pilot Project (project) at the King County South
Treatment Plant in Renton.
Proposed Construction Dates (begin and end dates)
It is anticipated that construction of the project will begin in early spring of 2022, and be complete in
early summer 2022, with operation commencing one to three months after final acceptance.
Hours and Days of Operations
Construction timing will be determined by the selected contractor. It is anticipated that construction will
occur Monday through Friday, from 7 a.m. to 4 p.m.; no weekend or late-night work is anticipated.
Proposed Hauling/Transportation Routes
The hauling/transportation route to the site is anticipated to be from Interstate 405 to northbound
Interurban Ave S (State Route 181), then east on SW Grady Way, then north on Monster Road SW,
turning east into the main entrance to the South Treatment Plant. The haul route could change depending
on the source of the materials needed for construction.
Measures to be Implemented to Minimize Dust, Traffic and Transportation Impacts
During construction, Best Management Practices (BMPs) will be implemented to control dust, erosion
and noise. Types of BMPs that will be used may include street sweeping, watering exposed soil surfaces,
and covering soil stockpiles to help minimize the amount of fugitive dust and particulate pollution to the
surrounding areas. Erosion control measures would also be implemented during construction and may
include stabilization of construction entrances and wheel washes to minimize tracking of sediment onto
the roadway and restoration of disturbed areas by repaving or replanting following construction. Measures
to reduce noise may include temporary noise barriers and effective equipment mufflers and shutting off
engines when not in use. Construction equipment-related emissions will be reduced by requiring proper
maintenance of equipment, using electrically powered equipment where practical, and avoiding prolonged
idling of vehicles and equipment. No impacts are anticipated to traffic on public rights-of-way during
construction; therefore, a traffic control plan is not included as part of the project.
Project construction will require delivery of equipment and materials by truck, generating approximately
275 truck trips total during construction. Given the existing vehicular activity on the South Treatment
Plant property, including daily biosolids hauling, and the industrial nature of the project vicinity, there
will be negligible changes in vehicular traffic as a result of construction activities. Therefore,
construction-related mitigation measures are not proposed.
EXHIBIT 13
RECEIVED
Clark Close 04/19/2021
PLANNING DIVISION
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