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Reported Obstructions Alerts

Oregon's rivers are inherently dangerous, and some are prone to natural obstructions based on the topography and geology of the water basin.  The obstructions listed on this page will list rivers that consistently have log jams, strainers or other debris. 
During the winter and spring, debris flows and fallen trees are common.  By the summer, dropping water levels expose sunken logs and strainers, and the current often becomes stronger in the main channels on rivers and can take less maneuverable craft (inflatables) directly into the obstructions.  Take the time to plan ahead and scout the river before you put in.  Expect sudden drop-offs into deeper water along reservoir and lake banks.  Always wear your life jacket.  
Inflatable floating devices (i.e. air mattresses, pool toys and inner tubes) are not designed for rivers.  Please avoid using these devices for river recreation.

On 5/26/18, the Hood River Marine Patrol reported 5-6 bundles of logs that broke free from their mooring up river and were beginning to separate downstream of the Hood River Bridge on the Columbia River. There are roughly 100 logs that range from 1-2 feet in diameter and 30 feet in length. Boaters are urged to keep a sharp lookout.  The Sheriff's Office is working with the log owner, SDS Logging, to collect the logs. 

​Two obstructions are between the State Rec Road and Forest Road (by 1000 trails).  The first GPS location is across the channel and has been there since 2014.  There is safe portage, but inexperienced boaters need to keep a sharp lookout and scout for a take out.  

The second obstruction is 1.3 miles downstream from the first obstruction.  Another tree has fallen and at lower water levels, portage will be difficult.  

At this time, these obstructions cannot be mitigated due to their remote locations. 

N 43 46.558' W 121 28.458' and N 43 46.986' W 121 28.082' 

​None reported at this time.

None reported at this time. 

​The Lane County Marine Patrol reported an obstruction on 5/26/18, a large tree on river right in the main channel, approximately 1 mile downstream of Bellinger Landing.  The Marine Patrol cautions boaters and recommends taking out at Bellinger Landing. This obstruction may not be passable to non-motorized boats when river levels drop.  There is a risk of entrapment.  Signage has been placed at nearby boat ramps upstream of the obstruction.    

McKenzie River below Bellinger Landing

Several trees were obstructing safe navigation on the McKenzie River approximately 1/2 mile downstream of the Deer Creek Road Bridge. The US Forest Service signed nearby boat ramps. This obstruction will was mitigated as much as possible thanks to McKenzie River Rafters. Boaters are advised to put in downstream of this obstruction and not attempt to push over the tree.  Boats can get entrapped easily.

UPDATE on 3/9/18: Recent rainfall with high river flows swung the tree approximately 70 degrees to river right and the river left is now open. 


​None reported at this time.

05/31/2018 -Fallen cotton wood trees are blocking a portion of the river near the confluence.  This location has historically been notorious for obstructions and boaters and recreationists are urged to avoid the area.  Signs have been posted at nearby ramps.  Due to water flows and the remote location of the obstructions, the Marion County Marine Patrol is unable to mitigate.  As water levels drop, they will attempt to remove what they can.  


05/17/2018 - Log jam reported between Buell Miller Ramp and Green's Bridge at the upstream end of Wiseman Island. The log jam at the head of the middle Wiseman Island channel has increased, and the gravel bar upstream of the log jam has encroached closer to the log jam. The only channel past the log jam is now less than 20 ‘ wide.  Two small logs from the jam extend more than half way across the channel just under the surface when the river flows are 4.5 at the Mehama river gauge.  When the river level drops to summer flows the location may be impassable to boats; boaters are advised to put in down stream of the obstruction.

North Santiam Log Jam reported 05/15/2018


The Bureau of Land Management reported two downed trees adjacent to Fisherman's Bend Park on 5/3/18.  One tree fell along the north river bank (river right) starting 1.5 miles west of the North 1st Avenue Bridge at Mill City.  THIS OBSTRUCTION WAS CLEARED on 5/11/18.  The second tree is river right in the main channel at mile 2.3 below the north 1st avenue Bridge at Mill City. The BLM is working on the best plan for mitigating the second obstruction and is coordinating with Marion County.  Boaters are advised to put in down stream of the obstruction.

North Santiam River Obstructions near Fisherman's Bend Park


North Santiam (44.685803, -123.004924)- Benton County Marine Patrol cut away a series of trees the best they could for safe passage of jet boats and drift boaters at the confluence of the North and South Santiam Rivers, upstream from Jefferson, OR.  This area is notorious for obstructions.  Most of the obstruction is river right going upstream, approximately 150 yards upstream from the confluence (pictured below).  One of the logs is just below the surface, so jet boaters and prop boats are encouraged to avoid the area due to the strainer and to protect their boats.  Sergeant Bottorff says, "Two ways to go through that stretch of river is to go over the log that is covered by about 6”-1’ of water towards the end of the log, or go to the left and zig zag past it when heading upstream.  Going downstream, the best path is to go over the log.  To go over the log, requires skills to read the water and jet boat experience."  Inexperienced boaters (motor, rafts and drift) should avoid the area and put in downstream of the confluence.  


UPDATE 5/18/2018:

The water has dropped leaving the log mostly exposed out of the water.  There is a passible spot to the left as described before.  This is a dangerous strainer and boaters are advised to use caution. 

North Santiam Log Jam updated 05/18/2018

North Santiam Log Jam updated 05/18/2018

North Santiam Log Jam updated 05/18/2018

North Santiam Log Jam updated 05/18/2018

Reported on 5/25/18 by the Jackson County Marine Patrol. Obstruction is a partially submerged tree located approximately 100' upstream of Gold Hill Bridge and is in the main channel, posing a risk to boaters. The Sheriff's Office will mitigate as soon as the weather and water flows permit.

Obstruction 100' upstream of Gold Hill Bridge

Reported on 5/25/18 by the Jackson County Marine Patrol. Obstruction is a strainer off the left bank located approximately 200' upstream of Lazy Acres and 1/2 mile below Gold Hill Bridge poses an entrapment or capsizing risk to boaters. The Sheriff's Office will mitigate as soon as the weather and water flows permit.

1/2 mile below Gold Hill Bridge 


Reported on 5/25/18 by the Jackson County Marine Patrol. Obstruction is a strainer between two boulders, approximately 1/4 mile upstream of the Twin Bridges poses a capsizing risk to boaters. The Sheriff's Office will mitigate as soon as the weather and water flows permit.​

Rogue River 1/4 upstream of Twin Bridges

​The river is being scouted for obstructions by the Clackamas County Marine Patrol. 

​None at this time.

​A fallen tree was reported on the Tualatin River, upstream from Fields Bridge in West Linn, behind 23044 SW Ulsky Rd.  This area is used primarily by paddlecraft and is passable.  The tree is also visible.  

The Tualatin Riverkeeper reported five separate log jams to the Washington County Marine Patrol who forwarded the information to the Marine Board. 

The log jams are in the following locations along the Tualatin River:

Near 9545 SW River Rd -LAT/LONG: -122.940 / 45.470226

Near 5220 SW Rood Bridge Rd: -122.940954 / 45.483887

Near 3995 SW Rood Bridge Rd: -122.952185 / 45.489920

Near 29365 SW Hillecke Rd: -122.975837 / 45.481148

Near 4570 SW Minter Bridge Rd: -122.978874 / 45.484550

In all of these log jams, law enforcement report that boaters cannot safely navigate around the obstruction and portage may not be possible.  In many of these log jams, there's a large volume of trees. Boaters are urged to plan ahead and avoid these areas.  

​OSP reports exposed pipe, probably from an old dock, that's exposed during low water flows.  OSMB will work with law enforcement to sign nearby ramps.  The pipes appear to be 9' vertical and 3"+ in diameter near the waterline.   This area is popular with motorized boaters.  

​None reported at this time.

Hileman County Park Boat Ramp
Paddlers reported a strainer downstream of Hileman County Park/Boat Ramp below the confluence of the McKenzie River on the side channel entering the main channel.  A log is on river left but the current carries paddlers to the right, into a log jam.  This was a close call for the paddlers, who were pinned but able to climb out to safety.  The Lane County Marine Patrol unit is assessing the obstrution for potential mitigation and recommendations for boaters.  Less maneuverable boats and inexperienced paddlers are encouraged to stay in the main channel.  These paddlers advise wearing life jackets and are grateful they wore theirs.  We will post updated information when we hear back from the marine patrol. -44.141065, -123.122286

​Coast Fork Willamette River
A boater reported an area of concern to the Lane County Marine Patrol on December 20, 2016.  The marine patrol report that this is an earthen dam (low head) with judraulic effects during high water.  The normal chute for passage is difficult to see.  Boaters should be able to navigate over any area of the earthen dam or portage around.  Boaters are urged to pay close attention and oar-through the area to avoid getting trapped. 43.864827, -123.0209788 


Brown's Landing Willamette River
Drift boaters who takeriver left may be drawn into the debris by the current. Take the river right channel, which is the first visible route when heading up or down stream. 44.1898627, -123.153338

Below Dexter Dam, Willamette River
A 1920's-era excavator fell into the river from an undercut banl below Dexter Dam.  The land is privately owned and there isn't safe portage.  A private contractor is required to remove the structure.  Signs are posted upstream to the dam alerting boaters of the structure.  Boaters are urged to avoid this area.  
43° 57'38.03"N, 122° 51'57.46"




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