Washington Park Arboretum Loop Trail

Updated: August 18, 2016

August 2016

Crews working for Ohno Construction are opening up Arboretum Creek, building walls and installing bridges for the new trail. Construction is scheduled to run through December 2017. The Arboretum will remain open during construction. We will route users around the construction activities using notifications and signage for the project duration. We know construction can be difficult and we appreciate your patience as we construct these improvements to the Arboretum.

Pedestrian access across the Birch Lot closed on August 1st.

Objective

Move the master plan forward and provide enhanced circulation to maximize the Arboretum value to all communities of western Washington as a place of education, conservation and recreation.

Description

This project provides a multi-use/loop trail from the intersection of East Madison through the Arboretum to the intersection of Foster Island Road and Lake Washington Boulevard. The addition of the 1.2 miles of paved multi-use trail creates a "loop" with the existing Arboretum Drive providing an accessible path for all visitors. The path will offer recreation opportunities and access to new parts of the Arboretum collection for all. The city received $7.8 million dollars from Washington State Department of Transportation. Seattle Parks and Recreation awarded the Berger Partnership the design contract after an RFP and interview process was conducted. The scope of work calls for a coordinated and phased construction of a multi-use trail system through the Washington Park Arboretum, a living museum of rare high value trees and plants. The contract work includes installation and maintenance of tree and plant protection, temporary erosion and sedimentation controls, temporary access issues and coordination for the Washington Park Arboretum, operations staff and visitors. The construction of a paved multi-use trail includes selective site demolition, specialty excavation by hand or air-spade, selective tree removal, excavation, grading, fill placement, paving, walls, bridges, storm drainage, utilities, parking, stream restoration, wetland restoration, site restoration, irrigation and planting. The work will be carefully controlled to limit the impacts. The project will:

  • Add 1.2 miles of paved multi use trail creating a "loop" with the existing Arboretum Drive providing recreation and access to the Arboretum collection
  • Remove 132 trees greater than 6" diameter, move 13 trees and propagate over 75 trees and large woody plants
  • Plant over 800 new trees throughout the Arboretum (a ratio of over 6:1 greatly exceeding the City of Seattle 2:1 tree replacement requirements)
  • Restore over 2.5 acres of wetland
  • Restore over 2 acres of forest around Lake Washington Playfield
  • Plant over 30,000 plantings for wetland, trail restoration, rain garden, groundcover and collections

The master plan for renewing the Washington Park Arboretum was adopted by City Council and the University of Washington Board of Regents in May 2001. The University, City and the Arboretum Foundation are working together to continue implementing the master plan.

Loop Trail Concept

Bridge Concept

Project Timeline

June 2016

Tree removal work has been completed and earthwork is underway. The logs stored in the Birch Lot will be used in the stream and wetland restoration work. When we open up the creek in the coming weeks access across the Birch Lot will be cut off and pedestrians from both Azalea Way and the Japanese Garden will be routed up to the Wilcox Bridge or down to the south end of Arboretum Drive to cross Lake Washington Boulevard.

April 2016

The Contractor, Ohno Construction has mobilized to the site and started surveying, installing tree protection fencing and erosion control. Tree removals, earthwork and clearing will begin in April within the limits of the trail work. 

January - March 2016

The re-bid project was awarded to Ohno Construction. The notice to proceed was issued to the contractor on March 7, 2016.

November - December 2015

Seattle Parks and Recreation is re bidding the Multi-Use/Loop Trail in the Arboretum . The project Advertised November 23, 2015 and bids will open December 16, 2015.

July - August 2015

Seattle Parks and Recreation advertised Multi-Use/Loop Trail in the Arboretum for public bid July 29 2015, Bid opening is scheduled for August 19, 2015. Seattle Parks encourages all interested parties to visit the electronic bidding website to view the complete plans and specifications. Together with our partners the University of Washington and the Arboretum Foundation, we look forward to the bid openings.

May - June 2015

Parks, the Green Seattle Partnership and contractor Applied Ecology are working to remove invasive plants around Lake Washington Playfield at the south end of the Arboretum to prepare the area for tree planting this fall. Two trees will be planted for every tree removed as part of the Multi-use/Loop Trail project.

March - April 2015

Thank you to all who attended the meeting in January. Parks and the design team are working to complete permitting and finalize the construction documents. Parks and the University Of Washington are working to begin moving and propagating collection plantings.

January 2015

Parks and the design team are working to complete permitting and finalize the construction documents. Parks and the University Of Washington are working to begin moving and propagating collection plantings.

October 2014

The design team is working with our partners at the University of Washington to complete construction documents for bidding this winter.

The final design development plan was presented at the Multi-Use Trail project's final public meeting on February 27, 2014. Thank you to those who have participated in the public process for the project.

The multi-use trail was identified in the Arboretum master plan that was adopted in 2000. The trail was identified as a way to enhance the visitor experience of Washington Park Arboretum. Intended for use by both pedestrians and bicyclists, the curving path is designed to preserve vegetation and control speed.

The Berger Partnership was awarded the design contract after Parks conducted a Request for Proposal (RFP) and interview process. Construction is anticipated to commence in 2015.

This project initially provided scoping and conceptual design for a redeveloped North Entry to Washington Park Arboretum and a multi-use trail from the intersection of East Madison to the North Entry and the Montlake and University neighborhoods beyond. The Consultant Selection Committee recommended that the Berger Partnership be hired to provide design services for the project and Parks moved forward with that recommendation.

Meetings for the design of the North Entry and Multi-use Trail were held in 2011. The community provided input to assist the designers in developing a preferred alternative.

In June 2013 City Council approved $7.8 million from WSDOT to fund implementation of the multi-use trail, which does not include the North Entry Project. The Arboretum Botanical Gardens Committee held a well attended press conference to announce this funding in January 2013. Final design and permitting will take place in 2014 and construction is expected to start in 2015.

Community Participation

See our Public Process Through June 2015 document for a synopsis of the project and our outreach efforts.