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BO1	Bradford Island Fish Ladder, USACE Bonneville Lock and Dam, located on the Columbia river approximately 3 miles southwest of Cascade Locks, OR.
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Driving Directions

From Tri-Cities
- Take US-395 south
- Take the I-82 E ramp to Pendleton/Umatilla - go 19 miles
- Take the WA-14 W exit 131 to Plymouth - go 79 miles
- Turn left onto US-97 - go 2.5 miles
- Bear right onto I-84 entry ramp - go 64 miles
- Take exit 40 to Bonneville Dam/Nat'l. Historic Landmark
- Arrive at Bonneville Lock and Dam

Site Configuration

BO1 Site Configuration - click to enlarge

Site History

PTOC has maintained the PIT tag detection system at the Bonneville Dam Bradford Island fish ladder since the antennas were first installed in the weir orifices of the A-Branch and B-Branch in 2002.

While the ladder was dewatered during the winter of 2005-2006, four new antennas were installed in the vertical slots of the flow-control section of the fish ladder immediately upstream of the Bradford Island Visitors Center. The new vertical-slot antennas were activated, along with the existing orifice antennas in the A- and B-Branch weirs, when the Bradford Island ladder watered-up on February 25, 2006.

On October 30, 2008, the Windows98 data collection platform was upgraded to Windows Vista and the full flow transceivers were put on UPS power.