Stormwater Pollution Control at a Major Highway Interchange
1994; Linguagem: Inglês
10.14796/jwmm.r176-10
ISSN2292-6062
Autores Tópico(s)Hydrology and Watershed Management Studies
ResumoA main concem of the Ontario Ministry of Transportation (MTO) has been for the control of the quantity of storm water runoff in the design of drainage systems for highways.This trend is now being revised to include the control of the quality of the stormwater runoff.This policy is presently being applied in the design of sections of Highway 407.Highway 407 will ultimately be a ten lane freeway extending from the westem edge ofMississauga, Ontario, at Highway 403, and continuing easterly to Highway 35/115, east of Oshawa, Ontario.Sections of Highway 407 have partially been constructed with the installation of bridge structures and road base grading.Construction is proceeding from the west to the east.The proposed Highway will be in excess of 100 km (60 miles) in length.This study focused on one of the major proposed Highway 407 interchanges located at the crossing of Highway 404 in Markham, Ontario.This interchange will be a four level interchange which will increase the area percent imperviousness to 44%.The study drainage area is approximately 380 ha (940 ac).The receiving channel for the storm water runoff is located to the south of the interchange and is a small, unnamed tributary which flows to the west to German Mills Creek which, in tum, joins the Don River system and discharges to Lake Ontario.A tunnel will be constructed to convey the flow from the interchange to the creek.
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