Development of fisheries production metrics for offsets in Great Lakes wetlands

Since 1868, the Canadian government has enforced legislation to protect fishes and their habitats. In 2012, amendments to the Fisheries Act shifted legislation from the protection of fish habitat to the protection of fisheries productivity. The Act requires that proposed development projects include plans to mitigate negative impacts to fisheries productivity. In the event that impacts cannot be fully mitigated, the net loss of fisheries productivity must be negated using offsets – actions that would increase productivity elsewhere.

Numerical Investigation of Long-Term Settlement of Waba Dam

Waba Dam is a zoned earth fill structure that was constructed on a deep soft, sensitive marine clay layer. This marine clay layer is characterized by its low shear strength and a large void ratio. During the last 32 years, the dam and its foundation has settled over 1.5 m (5 ft). Piezometric readings indicated that the excess pore water pressure in the foundation has not yet fully dissipated.

Numerical Investigation of Long-Term Settlement of Waba Dam

Waba Dam is a zoned earth fill structure that was constructed on a deep soft, sensitive marine clay layer. This marine clay layer is characterized by its low shear strength and a large void ratio. During the last 32 years, the dam and its foundation has settled over 1.5 m (5 ft). Piezometric readings indicated that the excess pore water pressure in the foundation has not yet fully dissipated.