Page 105 - TransportationPlanUsetsGuide

Refinement Areas
Refinement areas are locations that have been identified where further study is needed to determine the
mode, function and/or general location of a future solution or transportation improvement. Further study of
a refinement area may occur through a transportation planning process, capital project development or the
land development process. Before development may occur on land within a refinement area, the develop-
ment application must demonstrate how potential solutions to the transportation need will (at a minimum)
not be precluded by the proposed development.

SW 124th Avenue Refinement Area
There is a potential future need for a north-south arterial roadway and freight route in the vicinity of the
124th Avenue extension as shown on the Washington County Refinement Area Map. The County anticipates
undertaking a broader planning process to address the needs in the area as part of an evaluation and con-
cept planning of the potential future urban reserve lands within the area. A possible realignment of 124th
Avenue and/or Tonquin Road may need to be considered in the future.

NW 185th Avenue and OR Highway 26 Interchange Refinement Area
The need for improvements to the 185th Avenue and Highway 26 Interchange has been identified as a
potential future need. The design and other attributes of the interchange improvements require additional
refinement.

185th Avenue Extension Refinement Area
There is an identified potential future need for an extension of 185th Avenue connecting from SW Gassner
road to SW Kemmer Road. The extension would help relieve traffic congestion and improve traffic operations
North-South. The refinement area is expected to be evaluated in conjunction with planning for the urban ADOPTED TEXT
lands in the vicinity, particularly south of Kemmer Road.

North Bethany Neighborhood Route Refinement Area Map
Refer to Area of Special Concern (ASC) 6B in the Bethany Community Plan, Chapter 2, North Bethany Sub-
area Plan – as amended.

Day Road Overcrossing Refinement Area
The Basalt Creek Transportation Refinement Plan identified a potential future need for a future arterial cor-
ridor extending from the intersection of Boones Ferry Road and Day Road over Interstate 5 and connecting to
Elligsen Road. The proposed Arterial is not intended to provide access to or from Interstate 5. This refinement
area is intended to identify that a roadway alignment shall be evaluated prior to development or redevelop-
ment occurring. The final alignment will be determined through concept planning after the refinement area
has been brought into the Urban Growth Boundary.

I-5 to Highway 99W Refinement Area
In 2009 the I-5 to 99W Connector study was completed and resulted in a recommendation that included a
variety of transportation investments to improve the area’s road, transit, bicycle, pedestrian and trail net-
works. The result of the project acknowledged a desire to distribute traffic across the network and estab-
lished eight conditions that need to be addressed before the Southern Arterial can proceed to construction.
These eight conditions are listed in the technical appendix to this plan.

PART 3: TRANSPORTATION MODAL ELEMENTS 89
Effective November 27, 2015 • Updated December, 15 2016