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Collar

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Water

The open end of a drill hole.

Bureau of Reclamation — Bureau of Reclamation Glossary

Related Water terms

Boring
Burden
Casing
Collaring
Delay pattern
Dry well
Filter cake (mud cake)
Fishing
Gravelfill
Morning glory spillway
Spacing
Stemming
Well

Nearby Water terms

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Definitions are reproduced with attribution to their original sources; each entry links to the source and shows when it was retrieved. About · FAQ · Data build 2026-10-15.