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U.S. 20 Cascade Improvements (Sisters)


Latest News

Reconstruction of Cascade Avenue Completed
Cascade Avenue was reopened to traffic on May 16, 2014.  Paving was completed the first week of June.  Work on the streetscape features was substantially competed by October.Downtown Sisters, Oregon at dusk



Rendering of final streetscape design
Construction Information Paper - October 2013
Construction Timeline - October 2013

Project Components
The following components were part of the project, with construction in 2013-14.
  • Widen and reconstruct sidewalks, ADA ramps and curbing along Cascade Avenue;
  • Improve crosswalk safety;
  • Add streetscape features;
  • Improve the storm water drainage system;
  • Reconstruct Cascade Avenue;
  • Widen the roadway width at the intersection of Barclay Drive and Locust Street;
  • Repave Barclay Drive from Pine Street to Locust Street/Camp Polk Road;
  • Construct a dedicated right hand turn lane for at the intersection of U.S. 20 and Locust to facilitate traffic using the Alternative Route; and
  • Begin required access management review.
In May 2010, ODOT maintenance crews filled in the ruts on Cascade Avenue between Pine and Larch Streets.  This temporary measure will improve pedestrian safety by leveling off the payment in cross walks.  Drivers will find it easier to make turns onto the sides streets and cross Cascade Avenue with the ruts filled in.

Project Location

The project is located in the City of Sisters along Cascade Avenue (U.S. 20) between Pine Street and Locust Street.
Vicinity Map

Why this project is needed
Narrow sidewalks in downtown Sisters, Oregon. 
Narrow sidewalks in downtown Sisters, Oregon.
U.S. 20 provides a connection across the Cascades Mountains between the growing communities of Central Oregon and the Willamette Valley’s major population centers.  Thousands of trucks and passenger vehicles travel through the tourism based town of Sisters each day.  U.S. 20 is both a main street that supports dozens of businesses and a major regional freight route.  As a result, conflicts regularly arise between local and through traffic and pedestrians shopping and seeking entertainment within the scenic downtown corridor.  Conflicts are particularly highlighted during the summer tourist season when several special events occur and both pedestrian activity and through traffic increase. 
The pedestrian environment in the central business corridor of Sisters can be improved.  Despite its orientation toward pedestrian activity, the area suffers from narrow sidewalks, worn crosswalks, outdated ADA ramps, poor pavement conditions, inadequate storm water drainage and deteriorating curbs that are beginning to create an unsafe and worn look that can negatively impact the downtown business environment.

What the City of Sisters and the Oregon Department of Transportation plan to do
Rutted highway and cracking in downtown Sisters. 
Rutting and cracking along Cascade Ave. in Sisters.
This is a joint City of Sisters and ODOT project.  The project will make improvements to U.S. 20 that will address pedestrian/motorist conflicts and improve the walk-ability of downtown Sisters.  The intended result is to improve economic development within the community.
The following improvements are being proposed:
  • Reconstruct sidewalks and increase sidewalk widths from six to eight feet, except between Oak and Pine Streets where the widths will be nine feet;
  • Improve pedestrian crossings at intersections by building curb extensions, or “bulb outs”, with upgraded ADA ramps at Pine, Oak, Elm, Fir and Spruce Streets; this will reduce crossing distances and increase pedestrian visibility;
  • Add streetscape features such as decorative lighting, benches and landscaping;
  • Improve the storm water drainage system to eliminate flooding and standing water by adding drainage swales and Underground Injection Control (UIC) systems (for more information on UIC's and the permitting process, visit http://www.deq.state.or.us/wq/uic/uic.htm);
  • Reconstruct Cascade Avenue from Pine Street to Larch Street;
  • Grind out and repave Cascade Avenue from Larch Street to Locust Street; and
  • Widen the roadway width at the intersection of Barclay Drive and Locust Street to facilitate freight turning movements.

The goal of the project is to help balance traffic mobility and pedestrian safety while providing a safe and inviting atmosphere for the local community and tourists.  This should promote economic development and enhance livability in downtown Sisters.

Projected Timeline
 Downtown streetscape design  2010 / 2011
 Engineering design  2011 / 2012
 Right of Way acquisition   2012 / 2013
 Construction  2013 / 2014
Project Materials

Construction Staging Timeline - January 2013

Materials from January 23, 2013 Business Community Meeting:
Summary of concerns and responses
Final Streetscape Plan - January 2013

Materials from October 17, 2012 Community Meeting:
Meeting Handout - Construction Staging Options - October 2012
Schedule for Construction Staging Options - October 2012
US 20 Cascade Improvements Community Meeting Flyer
Public Announcement

Preliminary Construction and Traffic Staging Concepts - Spring 2012
Traffic Staging Maps
Summary Table of Options
Timeline for Staging Options

Materials from the August 2011 Community Workshop:
Community Preference Survey
Tree Concept Posters
Streetscape Elements Poster
Paver Options and Barclay Park Concept Posters
Workshop flyer 
June 2011 exploratory drilling news release and map
Cascade Avenue Design Concepts, March 2011: 
Ski Town             Cascadia
Main Street           Western              Traditional 
Community Workshop Flyer - March 15, 2011
Comment Form
City of Sisters Cascade Avenue Streetscape Ideas Report, December 2010:
Introduction, Sidewalks, Street Lighting & Suspended Elements - Pages 1-19 (6.7 MB)
Street Signage, Wayfinding, Furniture, Bicycle Parking, Tree + Shading, Landscaping & Irrigation - Pages 20-47 (16.4 MB)
Public Art, Safe Crossings & Green Streets - Pages 48-67 (12.0 MB)
Cases Studies - Pages 68-97 (15.0 MB)

Printable information paper and vicinity map last updated February 2012

Project Contacts
 Title  Office Phone
 Email address
Bill Martin Project Coordinator, ODOT
Paul Bertagna
Public Works Director, Sisters
Community Development Director, Sisters
Ann Fisher Community Liaison, ODOT