Prime Contractor Rank #4
UBI: 602170975
Lic: OLSONBP985J2
OLSON BROTHERS PRO-VAC LLC
Washington State public works contractor profile detailing awarded contract volumes, total project counts, top project awards, and county geographic distribution (2018–2025).
Total Awarded Spend
$20.14B
Total Projects
1,864
OLSON BROTHERS PRO-VAC LLC Award Trends (2018–2025)
Dual line chart: Total Spend ($) solid blue line vs Total Projects dashed gold line
Total Spend ($)
Total Projects
Swipe horizontally to explore trends
County Geographic Footprint
King County
$14.04B
Pierce County
$3.89B
Snohomish County
$993.92M
Kitsap County
$462.27M
Thurston County
$362.31M
Walla Walla County
$114.00M
Grays Harbor County
$98.98M
Clallam County
$93.41M
Skagit County
$81.51M
Mason County
$72.15M
Jefferson County
$58.99M
Lewis County
$46.45M
Grant County
$41.08M
Clark County
$27.10M
Chelan County
$21.44M
Kittitas County
$20.24M
Yakima County
$19.45M
Whatcom County
$14.68M
Cowlitz County
$12.90M
Pacific County
$4.20M
Okanogan County
$3.96M
San Juan County
$2.83M
Lincoln County
$2.59M
Adams County
$2.06M
Stevens County
$1.77M
Whitman County
$817.4K
Benton County
$769.8K
Major Awarded Public Projects
WSDOT SR 99 Bored Tunnel Alternative Design-Build Project
$1.09B
Awarding Agency: TRANSPORTATION, WASH STATE DEPT OF (King County)
Date: 2018-08-01
Washington State Convention Center Addition
$900.00M
Awarding Agency: CONVENTION & TRADE CENTER, WASH STATE (King County)
Date: 2026-07-16
R200 Downtown Redmond Link Extension
$729.27M
Awarding Agency: SOUND TRANSIT (King County)
Date: 2023-10-30
East Link Extension Seattle to South Bellevue (Contract E130)
$665.00M
Awarding Agency: SOUND TRANSIT (King County)
Date: 2024-11-21
SR 520 Montlake to Lake Washington � I/C and Bridge Replacement
$455.46M
Awarding Agency: TRANSPORTATION, WASH STATE DEPT OF (King County)
Date: 2026-01-22