ABOUT THE PROJECT
Background
The marinas on Detroit Lake are cornerstones of community activity, supporting the lake’s celebrated watersport culture and fueling the local economy in the warm seasons. Over recent years, the community’s economy has been strained by the impacts of the COVID-19 pandemic, wildfires and conditions that shorten the amount of time residents and visitors can access the lake.
Detroit Lake Marina and Kane's Marina lay upon shallow shelves. Since the lake has routinely failed to reach the "full pool" seasonal depth necessary to support a robust and viable lake recreation season, the marinas have been forced to open later and close their docks increasingly early.
This excavation project will enable the marinas to operate down to 1,525 feet, ensuring a more reliable and viable lake recreation season.
Multiple factors have affected Detroit Lake’s ability to maintain a “full pool” depth during summer, including:
Changing weather patterns
Municipal water needs
Fish and wildlife mitigation policies
Five-foot reduction of “full pool” depth to mitigate seismic hazards at Detroit Dam
Goals and outcomes

Create more dependable lake access and community benefits
The purpose of the Detroit Marinas Excavation and Resiliency Project is to assist Detroit Lake Marina and Kane’s Marina to maintain operations through the summer. This may include strategically excavating sediment beneath the docks so the marinas can operate at lower water levels. This will help maintain an annual summer lake season of May 1 to October 1 and support the local economy.
Revive the local economy
This resiliency project is estimated to create*:
- $1.2 million annually in direct and indirect economic activity throughout the region of the North Santiam Canyon.
- $14.6 million in net economic gain for the region over 20 years.
*Economic Importance of Water in the North Santiam Basin, 2019
Supporting wildlife and habitat benefits
Supporting a thriving ecosystem is a priority for Marion County and its community partners. This project aims to create and enhance habitat for fish and wildlife.

Project Timeline
August 2025–July 2026
Permits are in and in review with U.S. Army Corps of Engineers
February 2026
Exploratory drilling at Detroit Marina
July 2026–September 2026
Preparation for Fall ’26 excavation
September 2026–May 2027
All the haul off material will be used to shape the new peninsula at Osprey Point
September 2026
Excavation starts at the Detroit Marina
November 2026
Excavation starts at the Kanes Marina
December 2026
Excavation substantial completed
May 2027
Project complete
Permitting Schedule
| Permit | Jurisdiction | Submitted/Planned | Schedule (MM/YY) |
|---|---|---|---|
| Standard Individual Permit | US Army Core of Engineers | 8/15/2025 | 8/25→7/26 |
| Land Use Compatibility Statement | City of Detroit | 8/18/2025 | 8/25 |
| USACE 401 | State of Oregon DEQ | 8/30/2025 | 9/25→5/26 |
| Removal Fill | Oregon Department of State Lands | 8/30/2025 | 9/25→2/26 |
| DEQ 1200-C | State of Oregon DEQ | 4/1/2026 | 3/26→4/26 |
| Grading Permit | City of Detroit | 6/1/2026 | 6/26→7/26 |
| Floodplain Development Permit | City of Detroit | 6/1/2026 | 6/26→7/26 |
| Biological Opinion | National Marine Fisheries Service | TBD | *8/25→7/26 |
| Environmental Assessment | HUD | TBD | 8/26→10/26 |
| Forestry Department; Access Permit | U.S. Forest Service | TBD | 8/26→10/26 |
•Permits on track for excavation to start by 2026 reservoir draw down
•Communicating with reviewing agencies to provide quick responses if need be


