Introduction -- Authority -- The nature of the problem -- Purposes and scope of study and report -- Findings and conclusions -- Summary of findings -- Summary of conclusions -- Study method -- Interim reports -- Public hearings -- Study organization -- Prior regulation studies -- Great Lakes region -- Geographic description -- climate -- Socio-economic description -- Demography -- Economic activity -- Transportation -- Power -- Riparian property and development -- Great Lakes and their outflow rivers -- Lake Datum -- Lake Superior and St. Marys River -- Lakes Michigan-Huron and St. Clair-Detroit Rivers -- Lake Erie and Niagara River -- Lake Ontario and St. Lawrence River -- Water quality -- Fluctuation of water levels and flows -- General -- Natural factors affecting fluctuations -- Precipitation -- Evaporation -- Runoff -- Groundwater -- Ice retardation -- Aquatic growth -- Meteorological disturbances -- Tides -- Crustal movement -- Artificial factors affecting fluctuations -- Dredging -- Diversions -- Consumptive use of Great Lakes water -- Current regulation -- Supply and diversion summary -- Regulative characteristics -- Current regulation -- General -- Lake Superior -- Regulation plan history -- Existing regulatory works -- Water usage-Lake Superior outflow -- Lake Ontario -- Regulation plan history -- Existing regulatory works -- Selection of level and flow regime for comparison purposes -- General -- Selected study period -- Recorded data -- Derived data -- Net basin supplies -- Simulated supplies -- Basis of comparison -- Approach to development of regulation plans -- General -- Objectives and criteria -- Plan evaluation -- Trial plans -- Approach to evaluation of regulation plans -- Scope of evalu8ation -- Hydrologic effects -- Economic effects -- Commercial navigation -- Power -- Shore property-erosion and inundation -- Shore property-marine structures -- Shore property-water intakes and sewer outfalls -- Shore property-recreation beaches -- Shore property-recreational boating -- Generalized loss relationship -- Environmental effects -- Ecological effects -- Hygienic effects -- Aesthetic effects -- Social well-being -- Effects of alternative bases-of-comparison -- Development and evaluation of Lakes Superior-Ontario plans -- General -- Trial plans -- Selected plan -- Hydrologic effects -- Economic effects -- Environmental effects -- Regulatory works -- Evaluation against simulated future water supplies -- Alternatives requiring major construction -- Increasing the discharge capacity of Lake Superior -- Increasing the storage capacity of Lake Superior -- Summary -- Development and evaluation of Lakes Superior-Michigan-Huron-Ontario plans -- General -- Trial plans -- Selected plan -- Hydrologic effects -- Economic effects -- Environmental effects -- Regulatory works -- Potential benefit from SMHO plan -- Summary -- Development and evaluation of Lakes Superior-Erie-Ontario plans -- General -- Trial plans -- Selected plans -- Hydrologic effects -- Economic effects -- Environmental effects -- Regulatory works -- Plan SEO-33 -- Plan SEO-901 -- Plan SEO-42P -- Summary -- Development and evaluation of Lakes Superior-Michigan-Huron-Erie-Ontario plans -- general -- Trial plans -- Selected plan -- Hydrologic effects -- Economic effects -- Environmental effects -- Regulatory works -- Potential benefit from SMHEO plans -- Summary -- comparison and discussion of regulation plans -- General -- Hydrologic comparison by lake (Including its outlet river) -- Lake Superior -- Lakes Michigan-Huron -- Lake Erie -- Lake Ontario -- Summary of regulatory works and costs -- Lake Superior -- Lakes Michigan-Huron -- Lake Erie -- Lake Ontario -- Comparison of benefits (by interest and country) and costs -- Factors affecting ultimate benefits from regulation -- Departure from historical supply -- Consumptive use -- Changes in shoreline development -- Areas requiring further study -- General -- Effects of recent high supplies -- Nature of the supplies -- Performance of current regulation plans -- Performance of two selected regulation plans -- Downstream physical constraints on improved regulation of Lake Ontario -- Need for further regulation studies -- Improvement in regulation from better hydrologic forecasting -- Findings and conclusions.

National Ocean Service (NOS)

Great Lakes (North America)