News Headlines
From news.glin.net:

Lake Michigan water level up 2 feet since January 2013
South Bend Tribune (7/25)
Higher water levels delight marine enthusiasts, particularly the owners of large boats with difficulties running aground the past few seasons. The lake is still below its normal level but nowhere near the record low set in January 2013.

New St. Lawrence swimming hole proposed
Global News (7/24)
A harbor pool to facilitate swimming in the St. Lawrence river near Montreal has been proposed, but some worry about water pollution.

Lake Ontario bay dredging project set to start
The Wall Street Journal (7/21)
A dredging project aimed at clearing built-up silt from a Lake Ontario bay gets underway near Rochester, N.Y.

Ohio pushes to end sediment dumping into Lake Erie
Associated Press (7/20)
Ohio environmental regulators are working with local and federal agencies to find new uses for dredged sediment so that it no longer ends up in Lake Erie.

Michigan residents consider how to limit erosion at popular Lake Superior destination
The Associated Press (7/14)
Marquette, Mich. officials are looking for ways to limit erosion around Presque Isle Park, a popular recreational area in Michigan's Upper Peninsula. Park committee members are concerned about decreasing vegetation and soil cover around the popular Lake Superior destination.

Rainy spring, cold winter help buoy Great Lakes levels
Milwaukee Journal Sentinel (7/14)
After 16 years of bottom-scraping and dredging, boaters on the Great Lakes are experiencing something different this summer: deep water.

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Great Lakes Commission

General Definitions & Abbreviations

bgd: billion gallons per day

bld: billion liters per day

consumptive use: that portion of water withdrawn or withheld from the Great Lakes basin and assumed to be lost or otherwise not returned to the Great Lakes basin due to evapotranspiration, incorporation into products, or other processes (Agreement Article 103; Compact Section 1.2).

Great Lakes surface water (GLSW): the Great Lakes, their connecting channels (the St. Clair River, the Detroit River, the Niagara River and the St. Marys River), and the St. Lawrence River

groundwater (GW): all subsurface water

diversion: a transfer of Water from the basin into another watershed, or from the watershed of one of the Great Lakes into that of another by any means of transfer, including but not limited to a pipeline, canal, tunnel, aqueduct, channel, modification of the direction of a watercourse, a tanker ship, tanker truck or rail tanker but does not apply to water that is used in the basin or Great Lakes watershed to manufacture or produce a product that is then transferred out of the basin or watershed (Agreement Article 103; Compact Section 1.2)

intrabasin transfer: a transfer of water from the watershed of one of the Great Lakes into the watershed of another Great Lake (Agreement Article 103; Compact Section 1.2)

level of accuracy: the quality of data based on percentage of total volume and rated as 1) measured; 2) partially measured or 3) estimated,

level of aggregation: the quality of data based on percentage of total volume and rated as 1) originating from site-specific sources or 2) originating from higher level aggregate sources, such as county or census databases

mgd: million gallons per day

mld: million liters per day

other surface water (OSW): tributary streams, lakes, ponds, and reservoirs within the Great Lakes basin

threshold facility: a facility withdrawing in excess of the Great Lakes-St. Lawrence Compact/Agreement uniform trigger level of 100,000 U.S. gallons/day (380,000 liters/day) averaged over a 30-day period. A threshold facility is determined by the total withdrawal (or consumption) of all sources combined (Great Lakes-St. Lawrence surface water, other surface water, and groundwater) rather than a single source.

tgd: trillion gallons per day

tld: trillion liters per day

withdrawal amount: the taking of Water from surface Water or groundwater (Agreement Article 103, Compact Section 1.2).