Environment Canterbury is the lead agency for gathering and providing information on natural hazards (Resource Management Act 1991) and is a joint lead agency with territorial authorities for flood risk reduction (Soil Conservation and Rivers Control Act 1941). Environment Canterbury is required to administer the Ellesmere Lands Drainage Act 1905, the Waimakariri River Improvement Act 1922, the Ashley River Improvement Act 1925, and the South Canterbury Catchment Board Act 1946, and is a leasing authority for reserve land (Reserves Act 1977). Environment Canterbury required to maintain a register of dams in the region, to have an operative dangerous dams policy, and to be a Building Consent Authority responsible for processing and monitoring building consents for dams (Building Act 2004).