HomeMy WebLinkAboutCM_KC Renton Shop Construction Mitigation Narrative_190426_v1Renton Shop – Construction Mitigation Narrative 1
King County Department of Natural Resources and Parks, Parks and Recreation Division
King County Parks – Renton Shop
Construction Mitigation Description
As part of the Conditional Use Permit application package, the City requests a Construction
Mitigation Description be provided with responses to the following items:
1. Proposed construction dates
Applicant Response: At this time King County has identified construction occurring during
the 2020-2022 time frame. A minimum two-year construction window is anticipated due to
phasing to allow continuation of parks maintenance operations and dispatch from the site
as construction is ongoing. Because of the potential delays related to the phasing, King
County Parks requests extensions for civil construction and building permit approvals to be
valid for a period of 3 years from the date of issuance; thereby avoiding the need to reapply
for new permits while construction is on-going.
2. Hours and days of operation
Applicant Response: Construction of this facility is not expected to extend beyond typical
construction work hours allowed by Renton code. Construction activities shall be restricted
per RMC 4-4-030.C.3.b. to the hours between seven o’clock (7:00) a.m. and eight o’clock
(8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours
between nine o’clock (9:00) a.m. and eight o’clock (8:00) p.m. No work would occur on
Sundays.
3. Proposed hauling/transportation routes
Applicant Response: The Renton Shop site is accessed from Jefferson Avenue NE, a private
road owned by King County. The access road is used by other King County departments
such as the Roads Division and Solid Waste Division to access their facilities to the south of
the Renton Shop site. Jefferson Avenue NE intersects with NE 3rd Street at the signalized
intersection north of the project site. It is anticipated that construction equipment,
materials and supplies would be delivered to the site via Interstate 405 (I-405) heading east
on NE 3rd Street and turning south on Jefferson Avenue NE. Construction debris haulers
would utilize the same route heading back towards I-405. Haul hours shall be restricted to
the hours between eight-thirty (8:30) a.m. and three-thirty (3:30) p.m., Monday through
Friday unless otherwise approved in advance by the Development Services Division.
4. Measures to be implemented to minimize dust, traffic and transportation impacts, erosion,
mud, noise, and other noxious characteristics
Applicant Response: King County Parks will develop detailed construction plans and
specifications with the intent to minimize and avoid noxious impacts related to the Renton
Shop.
Renton Shop – Construction Mitigation Narrative 2
King County Department of Natural Resources and Parks, Parks and Recreation Division
Dust – King County will include specifications that require covering of soil stockpiles, water
spraying of exposed soils, covered dump truck and loads of soil entering or leaving the site,
and other dust related best management practices (BMPs) as appropriate. This will be
important because King County Parks’ staff may continue working on-site throughout all
phases of construction.
Traffic and Transportation – The Renton Shop will only require minimal traffic disruption for
the connection of utilities in City of Renton right-of-way. Application information for the
Renton Civil Construction permit will include detail of any proposed temporary road lane
closures, lane restrictions, or detours and reference Renton standard engineering
requirements for these activities.
Erosion and mud – King County will develop Temporary Erosion and Sedimentation Control
Plans (TESC) and a Stormwater Pollution Prevention Plan (SWPPP) to provide guidance and
BMPs to reduce and manage erosion potential. The construction contract issued for bid will
require the contractor to provide a Certified Erosion Sedimentation Control Lead (CESCL)
professional.
Noise – The contractor will be required to abide by the City of Renton noise code for
construction activities.
5. Special hours proposed for construction or hauling (i.e. weekends, late nights)
Applicant Response: It is unknown at this time if weekend or night time construction work
will occur; however it will be the contractor’s responsibility to file the proper permit
requests and obtain the work hour extension variances if they intend to conduct
construction activities outside the hours allowed by the Renton Municipal Code.
6. Preliminary traffic control plan
Applicant Response: The Renton Shop site does not have frontage adjacent to a public
right-of-way. The site is accessed from a private road, also known as Jefferson Avenue NE,
owned by King County that connects with NE 3rd Street at the signalized intersection to the
north. Traffic control would be required for several utility connections in NE 3rd Street.
Detailed design, including traffic control will be prepared as the plans develop and permit
applications for construction are submitted. All efforts will be made to limit the impact to
short-term lane closures during non-peak travel times to maintain traffic flow and minimize
delays.
7. Use of construction cranes
Applicant Response: It is anticipated that a construction crane will be needed. King County
will contact the City Airport Manager and the FAA as deemed necessary by the City to obtain
the proper notifications, approvals, and permits as required.