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Napa River Flood Project
The Napa River-Napa Creek Flood Protection Project is a Civil Works project of the US Army Corps of Engineers in the city of Napa, California. The Project area includes some 6 miles (10 km) of the Napa River from the Butler Bridge on State Route 29 on the south to Trancas Street on the north. This section is the upper reach of the estuary portion of the Napa River and as such is tidally influenced. The Project also includes improvements to 1 mile (1.6 km) of Napa Creek, the primary tributary to the Napa River. The project is cited as a new way of thinking about flood control due to its "living river" principles.
==History of Napa River flooding==
The Napa River runs some 55 miles (89 km) from Mt. St. Helena to San Pablo Bay and drains a watershed of about 426 square miles (1100 km²). The river is prone to seasonal flooding from November through April each year. Flooding that threatens lives and property occurs from the city of St. Helena south through the City of Napa. Recorded history indicates there have been at least 22 serious floods on the Napa River since 1865. The most serious recent floods occurred in 2005, 1997, 1995, and 1986.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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