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BO4	Washington Shore Fishway Vertical Slots, 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

BO4 Site Configuration - click to enlarge

Site History

PTAGIS has maintained the PIT tag detection system at the flow control section of the Bonneville Dam Washington Shore fish ladder since the four vertical-slot antennas were installed upstream of the counting window in 2005. The site went online March 2, 2005 with a Marathon Ever-Run virtual data collection platform. On September 4, 2008 the data collection platform was was replaced with standard MiniMon computers running the Windows Vista OS.