HomeMy WebLinkAboutEX15_CM_Construction_Mitigation_Description_Re-Align_Environmental_240729_v11
Variance Applica�on
Purelander SFR
1828 NE 20th St.
Renton, WA 98056
PRE21-000363
Construc�on Mi�ga�on Descrip�on
a. Proposed construc�on dates (begin and end dates)
June 2025 through July 2026
b. Hours of opera�on;
All construction activities conducted outdoors are expected to be during normal weekday hours
(8:00 – 5:00). Once the buildings are dried in, interior construction may take place outside of
normal workday hours, as needed.
c. Proposed hauling/transporta�on routes;
No designated hauling or transportation routes are proposed. The proposal is a single-family
residential home with an ADU on a previously-developed lot. All construction related
transportation would be via existing City roads to NE 20th Street, and to the existing driveway.
d. Measures to be implemented to minimize dust, traffic and transporta�on impacts, erosion, mud, noise, and other noxious characteris�cs;
Dust Control: As a single-family project in a wooded area, fugitive dust is expected to be minimal.
Dust control strategies, if needed, will include:
• Standard erosion control measures such as mulching or erosion control blankets over
bare soil areas; and
• Watering to moisten bare soil surface areas that are found to be liberating dust.
Traffic and Transportation: The proposal is a new single-family residence and ADU on a property
that was previously developed as a single-family residence. As a result, no traffic modeling has
been performed. It is estimated that during construction, approximately 10 trips per day would
result, including cars, pickup trucks, and construction vehicles. The completed re-development
project would result in 3 - 5 vehicular trips per day, with no projected peaks. No truck or non-
passenger vehicle trips are anticipated after completion of construction. A traffic impact analysis
is required when estimated vehicular traffic generated from a proposed development exceeds 20
vehicles per hour in either the AM (6:00 - 9:00) or PM (3:00–6:00) peak periods. Therefore, no
traffic impact analysis has been prepared for this project
Erosion/Mud: Standard erosion and sediment control measures will be implemented to minimize
erosion of soils and to prevent sediment transport off of the worksite. These include:
Docusign Envelope ID: 104DBDA6-11CD-4791-91FF-7DA2A96942C7
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• Silt Fence or wattles to prevent run-on into bare soil, and to capture mobilized sediment;
• Mulching or covering temporary bare soil areas;
• A construction entrance at NE 20th St.; and
• Permanent soil stabilization, including seeding, landscape plantings, and mulching.
Noise: Construction-related noise is expected during the construction period. These noises
would be limited to the normal workday hours. This noise could include traffic, heavy
equipment, chainsaws, and power tools. Upon completion of the project, typical residential
noise, described above, is to be expected. Noise-generating construction work would be limited
to normal workday hours. Once the buildings are dried in, interior construction may take place
outside of normal workday hours, as needed.
e. Any specialty hours proposed for construc�on or hauling (i.e., weekends, late nights);
None.
f. Preliminary traffic control plan.
This driveway access is the current driveway into the site and it was the access to the site when it
was previously developed. The proposal is a new single-family residence and ADU on a property
that was previously developed as a single-family residence. As a result, no traffic modeling has
been performed. It is estimated that during construction, approximately 10 trips per day would
result, including cars, pickup trucks, and construction vehicles. The completed re-development
project would result in 3 - 5 vehicular trips per day, with no projected peaks. No truck or non-
passenger vehicle trips are anticipated after completion of construction. A traffic impact analysis
is required when estimated vehicular traffic generated from a proposed development exceeds 20
vehicles per hour in either the AM (6:00 - 9:00) or PM (3:00–6:00) peak periods. Therefore, no
traffic impact analysis or traffic control plan has been prepared for this project.
Docusign Envelope ID: 104DBDA6-11CD-4791-91FF-7DA2A96942C7