Highlighted Project:‎ ‎ ‎ ‎ ‎ ‎‎ OR 36 MP 15.01 Hollo Creek Culvert Replacement

Details

County: Lane

Milepoints: 15.01

Estimated Cost Range: $10M - $30M

Anticipated Construction Years: 2029 - 2031

This project is programmed to start in 2027.

Programed projects have funding identified, are scheduled for 2027 and were approved by the OTC in January 2026.

Project Description

The existing culvert that allows Hollo Creek to go under Oregon 36 is in poor condition. This project will increase the crossing’s service life, resiliency and allow endangered fish species to migrate.

In October 2017, we inspected the culvert and found that it’s at the end of its service life and does not allow endangered fish to migrate. If this culvert fails before we are able to replace it, the highway would be impassable for locals and emergency vehicles.

Expected Outcome

With a larger culvert, the streambed below the road will be wider, offering a more natural habitat for migrating fish and other native plants and animals. While road users won’t see much change, this work will also improve the resiliency of the route, reducing the likelihood of flood- and erosion-related closures caused by heavy precipitation and runoff.

State of Good Repair

Extend the life of critical infrastructure.

This corridor provides an alternative route to Oregon 126W from the Willamette Valley to the Oregon Coast. The new structure will replace the one that’s failing and help keep the highway passable. This work will keep the highway open for years to come.

Improved water flow.

Proper water flow and erosion prevention come with a larger, adequately sized culvert. This improvement will also help reduce future ODOT maintenance costs, as older culverts in poor condition often require crews to clear upstream debris during storm events to prevent damage to the culvert and the road.

Climate

Manage water flow and minimize flooding and erosion.

The new structure will allow for higher stream flows during heavy rain and storm events. This work will help keep the highway from flooding.

Improve fish passage.

This work will create a clear span of 1-1/2 times the creek’s active channel width. This work will help water flow through the creek more evenly and efficiently, easing fish passage.