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The 1976 Memorial Day flood marked a milestone in Tulsa's search for flood solutions. A three-hour, 10-inch deluge occurred over the headwaters of Mingo, Joe and Haikey creeks. The resulting flood killed three people and caused $40 million in damages ($214 million in 2023 dollars) to more than 3,000 buildings.
Drainage gradient (DG) is a term in road design, defined as the combined slope due to road surface cross slope (CS) and longitudinal slope (hilliness). Although the term may not be used, the concept is also used in roof design and landscape architecture. If the drainage gradient is too low, rain and melt water drainage will be insufficient.
Advanced Drainage Systems, Inc. (ADS) is a company that designs, manufactures and markets polypropylene and polyethylene pipes, plastic leach field chambers and systems, septic tanks and accessories, storm retention/detention and septic chambers, polyvinyl chloride drainage structures, fittings, and water filters and water separators. [1]
The Cal-Sag Channel is utilized for inland shipping, recreational boating and drainage purposes in what was an active zone of heavy industry in the Far Southeast Side neighborhoods of the city of Chicago and adjacent suburbs. As a drainage channel, it is used as a conduit for treated effluent wastewater from southern Cook County, including the ...
Applying gravel, or "metalling", has had two distinct usages in road surfacing. The term road metal refers to the broken stone or cinders used in the construction or repair of roads or railways, [46] and is derived from the Latin metallum, which means both "mine" and "quarry". [47] The term originally referred to the process of creating a ...
d = run Δh = rise l = slope length α = angle of inclination. The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent.
It has since become one of the leading sources of user-generated reviews and ratings for businesses. Yelp grew in usage and raised several rounds of funding in the following years. By 2010, it had $30 million in revenue, and the website had published about 4.5 million crowd-sourced reviews. From 2009 to 2012, Yelp expanded throughout Europe and ...
Combined sewer outflow into the Anacostia River in Washington, D.C. Ratcliff Beach CSO discharges into the River Thames in London [7]. These relief structures, called "storm-water regulators" (in American English - or "combined sewer overflows" in British English) are constructed in combined sewer systems to divert flows in excess of the peak design flow of the sewage treatment plant. [6]