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City of Coeur d’Alene Stormwater Outfall Volume Reduction – Mullan Ave

Applicant – City of Coeur d’Alene

The City of Coeur d’Alene proposes installing treatment to remove discharge from the city’s stormwater outfalls. This project aims to install stormwater storage/filter systems and/or vegetated swales to divert stormwater from the existing outfalls in this 12-acres urban drainage area. An engineering study will determine the best storage and filtration method for the site.

This city requests $115,000 for this outfall project. It would reduce phosphorus by 20 lbs per year, yielding 200 lbs/10years (in perpetuity) for a cost-benefit ratio of $580 per lb phosphorus per 10 years,

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