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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Pore-water pressure: Internal hydrostatic pressure in an embankment caused by the
level of waters in the reservoir acting through pressure-transmitting paths between soil
particles in the fill.

Posted operating instructions: Those O&M instructions taken from the Standing
Operating Procedures that pertain to the mechanical features in the immediate area.

Pound per square inch (lb/in2): A pressure designation for pounds per square inch.

Probable maximum flood (PMF): See "flood, probable maximum."

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Reach: The area of a canal or lateral between check structures.

Remote operation: Operation of mechanical features from an on-site location other than
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Reserved works: Facilities operated and maintained by Reclamation.

Reservoir: The body of water (pool) impounded by a dam.

Reservoir Capacity AUocations (RCA): Shows a summary of acre-feet allocations of
water, to such purposes as surcharge, exclusive flood control, joint use" active
conservation, inactive storage, and dead storage.

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Richter scale: A scale of numerical values of earthquake magnitude ranging from I to 9.

Riprap: The broken rock or boulders placed on upstream and downstream faces of
embankment darns to provide protection from erosion caused by wind or wave action.

RO&M: The Review of Operation and Maintenance program; a periodic evaluation of
O&M activities at a particular facility. Also see "facility review, comprehensive" and
"facility review, periodic."

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Sand Boil: Seepage characterized by a boiling action at the surface surrounded by a cone
of material from deposition of foundation and embankment material carried by the
seepage.

SEED: The Safety Evaluation of Existing Dams program; an ongoing evaluation of the
factors that could adversely affect the safety of dams.

Seepage: The slow movement or percolation of water through small cracks, pores,
interstices, etc., from an embankment, abutment, or foundation.