Interrogation Site Metadata
GRS - Lower Granite Dam Spillway
Status: Active - OperationalGeneral Operational Period: Seasonally
Start Date: 4/3/2020 12:01 AM
This is an experimental site intended to monitor PIT tagged fish passage over a spillway. Eleven flatplate antennas are buried in the concrete of Spillway 1 at Lower Granite Dam. Each antenna is powered by a specially designed transceiver to be able to detect PIT tags moving at high speed. Each antenna is 44.5 inches by 86.5 inches, except for antenna 06 which is split into two sections to straddle the concrete expansion joint in the center of the spillway. Each half of antenna 06 measures 44.5 inches by 44.5 inches.
Current Operations
| Last File Loaded: | GRS-2025-120-P-020.json |
| Date Last File Loaded: | 4/30/2025 9:02 PM |
| Date Last File Opened: | 4/30/2025 7:00 PM |
| Date Last File Closed: | 4/30/2025 8:00 PM |
| Last Observation Tag: | 3DD.003D850C54 |
| Last Observation Date: | 4/30/2025 7:55 PM |
| Detection Summary: | Last Day's Observations |
Contacts
Location
Operational History
Operational history describes the period the site was interrogating for PIT tags. The comments provide anecdotal information about the operation of the site during this period. Site operational periods are updated typically at the end of the calendar year.
Configuration
Configuration metadata includes details about the equipment used at the site to detect and record PIT tags. A new configuration sequence record is created when equipment is added or removed from the site and the period of time it was active. A configuration sequence without an End Date is currently active.
Site Configuration Diagrams:
Equipment History
Select a type to view the history of equipment installed at this site. A missing End Date implies the information about the equipment is current.
Photos Not Found
Event Log Summary
This displays the last 25 events, to see the full history, log in to the Event Logs.