Lower Granite Lock and Dam
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Lower Granite Lock and Dam, operated by the US Army Corps of Engineers, is located on the Snake River at River Mile 107.5 (River Kilometer 173), about 32 miles below the confluence of the Clearwater and Snake rivers at Clarkston-Lewiston. Construction was completed in 1984. Facilities include a powerhouse, spillway, navigation lock, adult fish ladder, and a juvenile fish bypass system.
- Total Length: 3,200 feet (975 meters)
- Spillway Length: 512 feet (156 meters)
- Powerhouse Length: 656 feet (200 meters)
- Total Generation Capacity: 810 megawatts (6 generators)
- Normal Reservoir Elevation: 733-738 feet (223-225 meters) MSL
Contents |
Lower Granite Dam Links
- US Army Corps of Engineers' sites
- Walla Walla District's Lower Granite Dam Digital Project Notebook
- Walla Walla District's Lower Granite Dam Pertinent Data
- Lower Granite Dam Fact Sheet (pdf)
- Water Management Division's Lower Granite Dam page
- Water Management Division's DataQuery tool - historic and current fish, hydrologic, water quality, weather and power generation datasets
- Hydroelectric Design Center Lower Granite Dam Information (pdf)
- Adult Fish Count Interactive Reports
- 2010 Fish Passage Plan
- Bonneville Power Administration's Lower Granite Dam page
- Fish Passage Center's Lower Granite Dam page
PIT Tag Interrogation Site Contacts
- Data Steward
- Dave Marvin - Columbia Basin PIT Tag Information System
Pacific States Marine Fisheries Commission - Technical POC
- Don Warf - Columbia Basin PIT Tag Information System
Pacific States Marine Fisheries Commission
PIT Tag Interrogation Site Locations
PIT Tag Interrogation Site Details
GRA - Lower Granite Dam Adult Fishway and Trap
- Operating since 1988, this site initially consisted of four to five antennas located in the flumes that lead from the fish ladder into the fish trap. Separation by Code (SbyC) functionality was added to the site in 2000. In 2001, two 400KHz antennas in each flume were replaced with ISO antennas. In 2003, the remaining 400KHz antennas were replaced and additional antennas were installed into weir orifices and vertical slots near the top of the fish ladder. Refer to the site configuration history and the current site diagram for more details.
- Annual Event Logs and Dates of Operations
- PTAGIS Field Operations GRA Site Page
- Current Separation by Code Actions
Site Configuration History
The following table lists the various configurations of Antenna Group (Monitor) names and Antenna (Coil) IDs used at GRA. Click a Config # link to view the corresponding configuration diagram.
Config # Dates of Operation Antenna Group Antenna IDs 140 Dec 2003 - Present Weir 733 01 02 Weir 732 03 04 Weir 731 05 06 Weir 730 07 08 ISO West 12 14 16 18 ISO East 22 24 26 28
Previous site configurations 130 Feb 2003 - Dec 2003 Weir 733 01 02 Weir 732 03 04 Weir 731 05 06 Weir 730 07 08 400 KHz West 14 16 18 ISO West 10 12 400 KHz East 24 26 28 ISO East 20 22 120 Jan 2001 - Feb 2003 400 KHz East 00 02 04 ISO East A5 A5 400 KHz West 10 12 14 ISO West B4 B5 110 Feb 1995 - Jan 2001 East 00 02 04 06 08 West 10 12 14 16 18 110 Jan 1987 - Feb 1995 East 00 02 08 0A West 04 06 0C 0E Config # Dates of Operation Antenna Group Antenna IDs
GRJ - Lower Granite Dam Juvenile Bypass System (including site GRX - Experimental)
Operating since 1988, in its current configuration since 2007, this site interrogates PIT-tagged fish in the juvenile bypass system at Lower Granite Dam. Separation by Code, smolt monitoring, and collection and transportation of juvenile fish occurs at this facility. An experimental SbyC subsite, called GRX, was operated at this facility from 1996 - 1999, when it was integrated into GRJ. Antenna groups (monitors) are described below; all antennas were converted from 400 KHz to ISO during the winter of 1999-2000. See the current site diagram and site configuration history below for more details. For assistance in determining whether a PIT-tagged fish may have been transported, refer to FAQ:Transport vs Bypass.
- A-Separator Gate (A1-A2)
- This antenna group interrogates PIT-tagged fish that are collected from the A-side of the fish and debris separator, and can trigger a slide gate. By default tagged fish pass through the gate toward the raceways or river exits. If the gate is triggered by an SbyC tag, the fish will be diverted towards the Diversion SbyC Date antenna group. If the gate is triggered by a smolt sub-sample, the fish will be routed toward the Sample Tank.
- B-Separator Gate (B1-B2)
- This antenna group interrogates PIT-tagged fish are collected from the B-side of the fish and debris separator, and can trigger a slide gate. By default tagged fish pass through the gate toward the raceways or river exits. If the gate is triggered by an SbyC tag, the fish will be diverted towards the Diversion SbyC Date antenna group. If the gate is triggered by a smolt sub-sample, the fish will be routed toward the Sample Tank.
- Adult Fish Return (F1-F2)
- Installed in 2006. This antenna group interrogates PIT-tagged fish that are removed from the fish and debris separator and returned to the river.
- Raceway West/River Exit (21-23)
- This antenna group interrogates PIT-tagged fish that are routed to the West raceways or the barge dock.
- Sample Tank (51-53)
- This antenna group interrogates PIT-tagged fish that are collected by the facility for the smolt monitoring sub-sample.
- Raceway 10 Gate (11-12)
- Installed in 2007. This antenna group interrogates PIT-tagged fish that are routed to the East raceways. It triggers a gate, that in combination with facility gates, can route PIT-tagged fish to Raceway 10, Raceways 6-9, or the Bypass River Exit.
- East Raceway 10 (31-32)
- Installed in 2007. This antenna group interrogates PIT-tagged fish that are routed to Raceway 10 by a facility swing gate. This generally occurs when the facility is in transportation mode, and NMFS is marking fish from the East Raceways, to keep previously PIT-tagged fish separated from the marking operation.
- Raceway East (71-72)
- Installed in 2007. This antenna group interrogates PIT-tagged fish that are diverted to the East Raceways at the Rcwy-10 gate.
- Bypass River Exit (81-82)
- Installed in 2007, this antenna group interrogates PIT-tagged fish that are diverted to the River Bypass Exit. Fish detected at this monitor were not transported.
- Diversion SbyC Gate (C1-C2)
- Installed in 1996. This antenna group interrogates PIT-tagged fish that are diverted at the Separator Gates, and can trigger a 2-way rotating gate. The 2-way gate can divert tagged fish toward the river exit or pass fish through towards the SbyC Sample Tanks. From 1996-1999, it operated as part of site GRX as the Diversion River Gate antenna group.
- SbyC Gate (D1-D2)
- Installed in 1996. This antenna group interrogates PIT-tagged fish that pass through the 2-way SbyC gate, and can trigger the 3-way rotating gate. The 3-way gate can separate tagged fish into one of the three SbyC Sample Tanks. From 1996-1999, it operated as part of site GRX as the Diversion Hold Tank antenna group.
- Diversion River Exit (91-92)
- Installed in 1996. This antenna group interrogates PIT-tagged fish that are diverted at the 2-way Diversion SbyC Gate and return to the river. From 1996-1999, it operated as part of GRX as the Diversion River Exit antenna group. Fish detected at this monitor were not transported.
- Annual Event Logs and Dates of Operations
- PTAGIS Field Operations GRJ Site Page
- Current Separation by Code Actions
- FAQ: How to determine if a PIT-tagged fish was transported
Site Configuration History
The following table lists the various configurations of Antenna Group (Monitor) names and Antenna (Coil) IDs used at GRJ. Click a Config # link to view the corresponding configuration diagram.
Config # Dates of Operation Antenna Group Antenna IDs 140 Mar 2007 - Present A-Separator Gate A1 A2 B-Separator Gate B1 B2 Raceway West/River Exit 21 22 23 Rcwy-10 Gate 11 12 Raceway East 71 72 East Raceway 10 31 32 Bypass River Exit 81 82 Diversion SbyC Gate C1 C2 SbyC Gate D1 D2 Diversion River Exit 91 92 Sample Tank 51 52 53 Adult Fish Return F1 F2
Previous site configurations 130 Jan 2006 - Mar 2007 A-Separator Gate A1 A2 B-Separator Gate B1 B2 Diversion SbyC Gate C1 C2 C3 C4 Diversion River Exit 91 92 93 SbyC Gate D1 D2 D3 Raceway West/River Exit 21 22 23 Raceway East/River Exit 11 12 13 Sample Tank 51 52 53 Adult Fish Return F1 F2 120 Jan 2000 - Jan 2006 A-Separator Gate A1 A2 B-Separator Gate B1 B2 Diversion SbyC Gate C1 C2 C3 C4 Diversion River Exit 91 92 93 SbyC Gate D1 D2 D3 Raceway West/River Exit 21 22 23 Raceway East/River Exit 11 12 13 Sample Tank 51 52 53 110
100Mar 1988 - Jan 2000 A-Separator Gate 28 2A B-Separator Gate 2C 2E Raceway East 10 12 14 16 Raceway West/River Exit 18 1A 1C 1E Diversion 1 36 38 3A Diversion 2 30 32 34 Subsample 20 22 24 26 100 (GRX) Feb 1996 - Sep 1999 Diversion River Gate 70 72 74 76 Diversion River Exit 80 82 84 86 Diversion Hold Tank 90 92 94 96 Config # Dates of Operation Antenna Group Antenna IDs
