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| Activity | Date |
|---|---|
| Complete bi-national plan for IGLD (2020) and present to the Coordinating Committee for approval | Completed |
| Choose and adopt a W0 as the new IGLD reference zero | Completed |
| Identify potential partners/users who can help develop and implement IGLD (2020) | Completed |
| Digitize and archive old leveling information, as required | 2016-2023 |
| Perform annual maintenance and leveling ties at permanent water level gauges | 2016-2024 |
| Perform analysis of permanent gauging requirements and prioritize new proposed gauges | Completed (CO-OPS), 2023 (CHS) |
| Adjust and publish 2015 GPS campaign survey results | Completed |
| Complete preparing internationally coordinated methodologies for determining heights using GNSS surveys and local leveling at tie gauges | 2017-2025 |
| Review historic water level data for re-evaluation of Low Water Datum (LWD) | 2017-2020 |
| Reanalyze and compare all GPS campaign surveys from 1997, 2005, 2010, 2015 to estimate preliminary rates of movement | Complete |
| Perform analysis of seasonal gauging requirements and prioritize locations | Completed |
| Continue annual installations of seasonal water level gauges with GPS and leveling ties | 2017-2023 |
| Perform 20201 GNSS campaign survey in Great Lakes – St. Lawrence River system, including entity gauges | Summer 2021 |
| Adopt North American geoid model for IGLD (2020) | 2024 |
| Create crustal movement models for the Great Lakes – St. Lawrence River system using GPS campaigns and CORS/CACS data | 2022-2024 |
| Complete seasonal water level gauging | 2023 |
| Determine hydraulic correctors | 2024 |
| Determine new Low Water Datum on lakes and rivers with respect to IGLD (2020) | 2024 |
| Determine and publish transformations between IGLD (2020) and other datums, including IGLD (1895) | 2024 |
| Perform 2025 GNSS Campaign at permanent gauges and validate IGLD (2020) heights and crustal movement model | 2025 |
| Publish new IGLD (2020) | 2025 |
| Publish final IGLD (2020) report | 2026 |