Covenham Reservoir, located in East Lindsey is a 200 acre reservoir and treatment works constructed between 1963-1978 by W. & C. French. The reservoir was built next to the Louth Navigation canal and acts as a pumped storage reservoir from the canal, and can be supplemented by transfer schemes from Great Eau and Long Eau rivers. The reservoir is constructed of walls all around, raised 20m above the low lying lincolnshire marsh. The structure is concrete lined, which prevents growth of marginal plants, however this does not prevent the reservoir attracting varied waterfowl and other birds.