City of Walla Walla
E Chestnut Street Roundabout
Approximately 200ft north south east and west
TIB Award Amount
$1,110,000
Region: Southeast   |   Legislative District: 16   |   Length: 0.10 mi. FY 2025 Urban Arterial Program (UAP)

Existing Conditions

The City of Walla Wallas (City) Comprehensive Plan update, dated June 2018, highlighted three intersections that fell short of meeting the required operating standards for the 2040 design year, as set by both the City and WSDOT. Among these, the E Howard Street / Chestnut Street intersection remains the sole intersection necessitating upgrades according to the Comprehensive Plan. This determination, coupled with significant community feedback, has led the City to prioritize the improvement of this particular intersection. Situated at the confluence of two minor arterials, Chestnut Street is currently stop-controlled, with a 50-ft offset in the through movement. These geometric and intersection control constraints have resulted in an existing Level of Service (LOS) of E, and a projected LOS of F by the year 2040.

Project Funding

  TIB Funds Local Funds Total Costs
Design 191,126 68,874 260,000
Right of Way 73,510 26,490 100,000
Construction 845,364 304,636 1,150,000
Project Totals $1,110,000 $400,000 $1,510,000

Local Match

TIB Participation Local Match Minimum Local Match
73.5% 26.5% 20%

Summary of Improvements

Description of Improvements

The City performed a comprehensive traffic analysis for the intersection, encompassing an assessment of its current state and exploring alternatives such as signalized intersections and roundabouts. After a thorough evaluation, it was concluded that a roundabout would be the preferable solution to address the safety, geometric, accessibility, and most significantly capacity issues. The implementation of a roundabout is projected to elevate the Level of Service (LOS) from E to A on opening day and maintain this improved LOS throughout the 2040 design year. The proposed roundabout will be incorporated into the Citys forthcoming Infrastructure Repair and Replacement Program (IRRP) project. The Howard Street IRRP project will replace all water, sewer, and roadway infrastructure between Juniper Street and Bryant Street along Howard Street. Funding for the IRRP Program is derived from a six year stepped utility rate increase, which was established in 2010. It is essential to note that the IRRP fund is exclusively allocated for repair and replacement of public infrastructure and cannot be utilized as a funding source for the Roundabout Improvements.