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Windsor provided an analysis of a stormwater outfall located near a large dune. The outfalls is called “7th & Oak.” The project was necessitated due to concern about potential erosion, outfall permitting, and water quality. The outfall extends past the statutory vegetation line and emerges at the base of a large dune. The City had previously installed filtration treatment measures to the outfall system. Windsor provided alternatives analysis and cost estimates to add additional treatment and possibly to reconfigure the outfall. The City implemented additional pretreatment measures quickly after a recommendation by Windsor. Consideration is being given by the City for two alternatives for further improvements, either of which would further preserve safety and reduce erosion potential.


Cannon Beach, Oregon

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