| Aqueduct: | conduit or artificial channel for conveying water. AqueductBridge: a structure that carries a canal over a river, steam,or valley. |
| Berm: | a side bank a of canal, also known as the heel path. |
| Blueline: | a non-reproducible blue image or outline usually printedphotographically on paper or plastic sheeting, and used as a guide fordrafting,stripping or layout.Sometimes called blind image. |
| Culvert | a traverse drain or other conduit channeling water ;feedculverts are hollow spaces, or tunnels,within lock walls through whichwater for filling or "feeding " a lock and for emptying it isconducted. |
| Dam | a structure built across a watercourse to maintain waterlevels and confine and keep back flowing water . |
| Flowage [flow] line: | a contour or line around a reservoir, pond,lake or alonga stream corresponding to some definite water level ; generally used inconnection with the acquisition of rights to flood lands for storage purposes |
| Guard lock: | a lock at the mouth of a basin or a lock for preventingflooding, usually where the canal joins a natural water course. |
| Hydrograph: | a chart recording the changing level of water, as ina reservoir, stream, or river. |
| Lateral canals: | branch canals leading to the main channels |
| Lock: | an enclosure with gates at each end used in raising orlowering boats passing from one level to another. |
| Miter gates: | two gates which swing together to form a wide"V" |
| Muck: | the bottom soil in a watercourse;dark, usually black,earththat incapable of absorbing much water, often consisting of decomposingplant matter |
| Prism: | the volume of water in a stream or waterway in motionconsidered as a shape of chosen length in conjunction with the cross sectionof the channel. |
| Siphon lock: | a lock in which the water for filling and emptying iscontrolled by an application of the siphon princple, as distinguished |
| Spillway: | a passageway for surplus water from a canal or reservoir. |
| Tow path: | a path along one bank of a canal where teams of youngmen and animals worked to pull boats. |
| Tons capacity: | the carrying amount stated in tons. |
| Vertical cross sections: | generally found on geological maps, drawn across themap to illustrate the geological structure of the rocks through the upperlevels of the earth's crust . |
| Waste weir: | an overflow, or weir, for theescape of surplus water from a canal or reservoir; a dam-like structurealong the canal berm with openings to control the water level . |
