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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002418

Surcharge Capacity.-The reservoir capacity provided for use in passing the inflow
design flood through the reservoir. It is the reservoir capacity between the
maximum water surface elevation and the highest of the following elevations (1)
top of exclusive flood control capacity, (2) top of joint use capacity, or (3) top of
active conservation capacity.

Total Capacity.-The reservoir capacity below the highest of the elevations representing
(1) the top of exclusive flood control capacity, (2) the top of joint use capacity, or
(3) the top of active conservation capacity. In the case of a natural lake which has
been enlarged, the total capacity includes the dead capacity of the lake. Total
capacity is used to express the total quantity of water which can be impounded
and is exclusive of surcharge capacity. (In those cases where the dead capacity
has not been measured, specific mention of this fact should be made).

Live Capacity.-The part of the total reservoir capacity from which water can be
withdrawn by gravity. This capacity is equal to the total capacity less the dead
capacity .

Active Capacity.- The reservoir capacity normally usable for storage and regulation of
reservoir inflows to meet established reservoir operating requirement. It extends
from the highest of (1) the top of exclusive flood control capacity, (2) the top of
joint use capacity, or (3) the top of active conservation capacity, to the top of
inactive capacity. It is also the total capacity less the sum of the inactive and dead
capacities.

Exclusive Flood Control Capacity.- The reservoir capacity assigned to the sole purpose
of regulating flood inflows to reduce flood damage downstream. In some
instances, the top of exclusive flood control capacity is above the maximum
controllable water surface elevation.

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Joint Use Capacity.- The reservoir capacity assigned to flood control purposes during
certain periods of the year and to conservation purposes during other periods of
the year.

Active Conservation Capacity.- The reservoir capacity assigned to regulate reservoir
inflow for irrigation, power, municipal and industrial use, fish and wildlife,
navigation, recreation, water quality, and other purposes. It does not include
exclusive flood control or joint use capacity. It extends from the top of the active
conservation capacity to the top of the inactive capacity.

Inactive Capacity.- The reservoir capacity exclusive of and above the dead capacity from
which the stored water is normally not available because of operating agreements
or physical restrictions. Under abnormal conditions, such as a shortage of water
or a requirement for structural repairs, water may be evacuated from this space
(after obtaining proper authorization). The highest applicable water surface
elevation described below usually determines the top of inactive capacity.