GEOWEB® EROSION & HARD-ARMOR PROTECTION McCook Quarry Flood Reservoir PROJECT OVERVIEW Permanent erosion protection was necessary for the McCook Quarry flood reservoir for the City of Chicago. The reservoir averages 300 ft deep and is approximately 1.75 miles in diameter. The 105 ft long slopes above the quarry face required a system that would be low mainte- nance and stable at 2H:1V. A major site specific chal- lenge was installing

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