WSP00774

• File Number: 8220.106.A.1.a
• Description: Animas La Plata Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/3000
• Author: Unknown
• Title: Animas La Plata Annual Operating Plan - From 2002 ALP-POC Notebook - Date Unknown
• Water Supply Pro - Doc Type: Report/Study

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Gate chamber: A chamber in which a guard gate in a pressurized outlet works or both
the guard and regulating gates in a free-flow outlet works is located.

Gate, cylinder: A gate that resembles a large barrel, reinforced to withstand external
pressure, with no top or bottom.

Gate, drum: A movable crest gate in the form of a sector of a cylinder hinged at the
centerline. The arc face effects a seal with edge of a recess and the gate is operated by a
reservoir pressure. Design permits overtopping.

Gate, emergency (gnard): The fust gate in a series of flow controls, remaining open
while downstream gates or valves are operative.

Gate, fixed-wheel: A gate consisting of a rectangular leaf mounted on wheels,
particularly suited for high head situations.

Gate, high-pressure: A gate consisting of a rectangnlar leaf encased in a body and
bonnet and equipped with a hydraulic hoist for moving the gate leaf.

Gate, jet.flow: A gate consisting of a wheel-mounted leaf moved vertically by a
motor-driven screw hoist.

Gate, operating (or regulating): A gate used to regulate the rate of flow through an
outlet works.

Gate, radial: A pivoted crest gate, the face of which is usually a circular arc, with the
center of curvature at the pivot about which the gate swings (same as tainter gate).

Gate, ring-follower: A gate consisting of a rectangular leaf and an opening equal in
diameter to that of the conduit that forms an unobstructed passageway when the leaf is in
the raised or open position.

Gate, ring: A ring- or annular-shaped steel drum operating in a recess or gate chamber in
the spillway crest and controlled in a manner similar to a drum gate.

Gate, roller: A gate rolled up or down jnclined supporting rails by a hoist through
sprocket chains around the ends of a cylinder.

Gate, slide: A steel gate that upon opening or closing slides on its bearings in edge guide
slots.

Gate, tainter: A term used by the Corps. of Engineers to describe radial gates (see "gate,
radial").

Gate hanger: A device used to maintain a set gate opening.

Groin: The contact between the upstream or downstream face of the dam and abutments.