WSP10265

• File Number: 8143.700
• Description: John Martin Reservoir - Annual Operating Plans and Reports
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 12/1/2000
• Title: Annual Report of the Operations Secretary - Concerning the Operation of John Martin Reservoir - 2000
• Water Supply Pro - Doc Type: Annual Report

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Having received no direction from the Operations Committee or the Arkansas
River Compact Administration regarding the matter, the Operations Secretary determined
to continue the practice of interrupting the release of water from conservation storage into
accounts as of November I, 1999.

In accordance with the April 24, 1980 Resolution of the Arkansas River Compact
Administration, Concerning an Operating Plan for John Martin Reservoir as amended
(1980 Operating Plan), the 1999/2000 "period of winter storage" began at 0000 hours on
November I, 1999. From that time, inflow to John Martin Reservoir began to accrue to
conservation storage as indicated by increases to the Winter Compact account.

Beginning on November 25, 1999, pursuant to the provisions of Section III
(sometimes referred to as Article III) of the 1980 Operating Plan, the storage of certain
other water was credited to the Winter Water account.

At 1746 hours on January 27, 2000, the Corps of Engineers determined that the
reservoir content had reached the level of maximum allowable invasion of the flood pool
by the permanent recreation pool (eL 3851.76) and asserted control of operations for
flood control purposes, thus beginning the spilL

After the reservoir content reached the level of maximum allowable invasion of
the flood pool by the permanent recreation pool, inflows continued to accrue to
conservation storage (Winter Compact account) pursuant to Section II of the 1980
Operating Plan. As conservation storage increased, water in other accounts within the
conservation pool was displaced into the flood pool at the rate of computed inflow and
according to the order of spill provided in Section II G of the 1980 Operating Plan and as
revised by paragraph 13 of the Resolution Concerning An Offset Account in John Martin
Reservoir for Colorado Pumping as amended March 30, 1998. .

In this marmer, 4283.77 a.f. are shown to have been released from the Section
(Article) III holding account (a.k.a. Winter Water account) and 1976.56 a.f. from the
Offset account as of 1243 hours on February 7, 2000. At that moment of initiation of
spill from Section II accounts the content of each was determined, the sum of which
established the limit of Section II water that was subject to spill (263,884.58 a.f.). A ratio
of the volume controlled by each state to the total volume at that time was also
determined to calculate the amount of deduction to be subtracted from each state's
account(s). This ratio was determined to be .5414891 for Colorado and .4585109, for
Kansas.

On February 4, 2000, the Corps of Engineers initiated a deviation from the Water
Control Plan for John Martin Reservoir and thereafter, stored in excess of 5,000 a.f.
within the flood control pooL A portion of this water was then released during the week
of March 6, 2000 to partially exercise the dam's 16 tainter gates without depleting water
from the conservation pooL A memorandum describing a March 9, 2000 teleconference,