Construction hours in Kennewick, WA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Construction noise in Kennewick is exempt from the WAC 173-60 maximum environmental noise levels during daytime hours under WAC 173-60-050(4), but the exemption disappears between 10:00 p.m. and 7:00 a.m. at any Class A (residential) receiving property. Outside that nighttime window, construction-equipment sound is also bounded by the Kennewick Municipal Code's general public-disturbance provisions and by site-specific conditions Kennewick may impose on a permit.
Temporary construction-site noise is treated as a recognized exception to the statewide environmental noise standards during normal working hours. WAC 173-60-050(4) provides that sounds originating from temporary construction sites as a result of construction activity are exempt from the WAC 173-60-040 maximum permissible noise levels, but the exemption does not apply between 10:00 p.m. and 7:00 a.m. when measured at a Class A (residential) receiving property. The practical effect is that construction equipment may operate above the 55-65 dBA caps during the day but must observe the 45-50 dBA residential nighttime limits. The Kennewick Municipal Code, hosted through Code Publishing, supplies the local public-disturbance backstop that applies regardless of the WAC 173-60 daytime exemption, so contractors who run percussive or amplified equipment at unreasonable levels can still be cited. Kennewick may also impose specific construction-hour conditions on building or right-of-way permits issued under KMC Title 15 or Title 12. The Tri-Cities region's rapid growth means active subdivision construction is common in southern Kennewick.
Construction-hour violations between 10:00 p.m. and 7:00 a.m. are enforceable under WAC 173-60 by the Department of Ecology or by local jurisdictions that have adopted the standards. Public-disturbance noise during exempt daytime hours is enforceable as a civil infraction by Kennewick Police or Code Enforcement. Permit-condition violations may trigger stop-work orders by Kennewick Development Services.
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