Great Lakes Coordinating Committee If you need information on these datasets, or are looking for other datasets please contact:
info at greatlakescc.org
Hydraulic Subcommittee
Methodologies for conducting hydraulic discharge methods in the Great Lakes Connecting Channels
Database of binational discharge measurements
Monthly flow records for the Connecting Channels:
- St. Marys River
- St. Clair River
- Detroit River
- Niagara River
NiagaraRiver_MonthlyFlow_1900to2020.csv
- St. Lawrence River
Methodologies for coordinating the computation of streamflow
Diversions in the Great Lakes system
Conveyance change monitoring reports
Hydrology Subcommittee
Coordinated:
Beginning of Month Water Levels:
- LakeSuperior_BeginningOfMonthWaterLevels_1900to2025.csv
- LakeMichiganHuron_BeginningOfMonthWaterLevels_1900to2025.csv
- LakeStClair_BeginningOfMonthWaterLevels_1900to2025.csv
- LakeErie_BeginningOfMonthWaterLevels_1900to2025.csv
- LakeOntario_BeginningOfMonthWaterLevels_1900to2025.csv
Beginning of Month Water Levels – Historical Average:
- LakeSuperior_HistoricalAverage_BeginningOfMonthWaterLevels_1918to2022
- LakeMichiganHuron_HistoricalAverage_BeginningOfMonthWaterLevels_1918to2022
- LakeStClair_HistoricalAverage_BeginningOfMonthWaterLevels_1918to2022
- LakeErie_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
- LakeOntario_HistoricalAverage_BeginningOfMonthWaterLevels_1918to2022
Monthly Mean Water Levels:
- LakeSuperior_MonthlyMeanWaterLevels_1918to2024
- LakeMichiganHuron_MonthlyMeanWaterLevels_1918to2024
- LakeStClair_MonthlyMeanWaterLevels_1918to2024
- LakeErie_MonthlyMeanWaterLevels_1918to2024
- LakeOntario_MonthlyMeanWaterLevels_1918to2024
Historical Average – Monthly Mean Water Levels:
- LakeSuperior_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
- LakeMichiganHuron_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
- LakeStClair_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
- LakeErie_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
- LakeOntario_HistoricalAverage_MonthlyMeanWaterLevels_1918to2022
Monthly Residual Net Basin Supplies:
- LakeSuperior_MonthlyNetBasinSupply_1900to2024
- LakeMichiganHuron_MonthlyNetBasinSupply_1900to2024
- LakeStClair_MonthlyNetBasinSupply_1900to2024
- LakeErie_MonthlyNetBasinSupply_1900to2024
- LakeOntario_MonthlyNetBasinSupply_1900to2024
Historical Precipitation:
Vertical Control – Water Levels Subcommittee
Coordinated:
- International Great Lakes Datum (1955)
- International Great Lakes Datum (1985)
- International Great Lakes Datum Update Plan
- Elevation and other information on bench marks
- Vertical velocity models
- Hydraulic corrector models
- Gravity models
- GPS campaigns used for crustal movement monitoring, and both historic and present datum transformation methodologies
- Water level data collection methodologies
- Low water datum values and determination methods
- Low water datum step planes for the interconnecting channels and the St. Lawrence River
- Water level gauging network adequacy assessments
- Data calculation methods including individual station data averaging and also lake-wide average calculation methods
Coordinated Great Lakes Regulation and Routing Model Update Subcommittee
Coordinated Great Lakes Regulation and Routing Model
Coordinated Great Lakes Regulation and Routing Model Update Plan