It was considered dÃ©classÃ© to refer to one's own townhouses, estates or villas (or those of friends) as mansions and modern etiquette books still advise that the terms house, big house or great house be used instead.
Waste weir. A waste weir on a navigable canal is a slatted gate on each canal level or pound, to remove excess water and to drain the canal for repairs or for the winter shutdown.
Solved Example. Objectives of Weirs in Irrigation Canals. Proper distribution of water carried by a main canal among the branch canals depending upon it. Reducing the hydraulic slope (gradient) in a canal (if canal water slope is greater than the allowable water slope) Reducing head on existing structures.