WSDOT Projects

During the RDP process, conceptual alternatives proposing improvements on SR 904 were developed. WSDOT further refined the analyses down to two feasible alternatives. The design alternatives were evaluated in relation to general environmental, right of way, and infrastructure impacts. Mobility, safety, public sentiment, and economic issues were also considered. The construction cost (Year 2003 dollars) of the two alternatives were comparably close. The right-of-way costs are significantly different. The following provides a synopsis of the alternatives:

Alternative 1 ($14.1 Million)

Five lane undivided with two way left turn lane throughout length of corridor.

Attributes

• Improves safety

• Improves capacity

• Some separation of traffic

• Mainline can be constructed within existing right-of-way

• Minimal need of right-of-way for county road intersections

• Fewer anticipated impacts to environment

• Route Continuity

Potential Concerns

• No physical separation of traffic

• Wider roadway for traffic to cross

Four lane divided roadway section with a 60 foot wide rural median

Attributes

• Improves safety

• Improves capacity

• Physical separation of traffic

Potential Concerns

• Access Control

o Driveways will be right in/ right out only

o Or Frontage road will be needed

• More anticipated impacts to environment

• Route Continuity

• Additional right-of-way required for the entire length of the corridor

• Approximately 6 residential relocations will be required. Exact number will be dependent on design.

The chosen alternative is the five lane with the two way left turn lane throughout the length of the corridor. A traffic signal may be proposed at intersections if warrants are met during the design phase and if a signal is deemed the appropriate solution. There will be partial access control along this route. This alternative is more cost beneficial overall with more advantages and provides the necessary capacity and safety improvements.