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~:') Summary ,- ) N C) ""'" N Operation of John Martin Reservoir November 1, 1997 throngh October 31,1998 Winter stortlge in John Martin Reservoir begtln at 0001 hr, November I, 1997. At that time, the reservoir contained 296,088.00 a.f., distributed as follows: 278,529.78 a.f. in Agreement accounts; 7562.11 a.f. in the permanent recreation pool; 4433,19 a.f. in conservation storage (stored during the summer storage season and shown in the Summer Compact Water account); 5356.98 a.f. in the Offset account; and 205.94 a.f. in the City of Lamar Project account. Pursuant . ~ to Section (Article) III Band C of the Resolution Concerning An Operating Plan for John Martin . ",,,,,.\~r'\... Reservoir as amended (Operating Plan), water remaining in the Fort Lyon and Las Animas, "'C" ,uD Consolidated Article III account at the end of the compact year was transferred to conservatioV storage shown in the Winter Compact Water tlccount. The Pueblo winter storage program did not operate during the winter of 1997-98 to cause any accrual to the Winter Water tlccount for subsequent transfer to Article III accounts of Amity, Fort Lyon Canal Company, and the Las Animas Consolidated. Although the content of John Martin Reservoir did not reach the maximum allowable content on December 12,1997, the Corps of Engineers decided to assume control of operations for flood control purposes at that time and began a rele ~,I 00 cfs. at 0930 hI'. This release was increased to 200 cfs. at 1400 hr. A total 0 04.00 ai:Jwas released from conservation storage (Winter Compact Water account) prior to when spill was determined to have occurred at 0000 hr. on December 14, 1997. After the reservoir content reached the level of the maximum allowable invasion of the flood pool by the permanent recreation pool all inflow continued to accrue to conservation storage (Winter Compact Water account) pursuant to Article II A of the Operating Plan and releases (transfers) were made from various accounts (according to the order of spill provided for in Article II G of the Operating Plan and revised by Paragraph 13 of the Resolution Concerning An Offset Account In John Martin Reservoir For Colorado Pumping as amended March 30, 1998) to the Flood Pool account at the rate of actual inflow to the reservoir. Storage of water upstream of John Martin Reservoir under post-Compact water rights occurred beginning on December 15, 1997 at which time the flow of water measured at the Garden City, Kansas, gauge registered approximately 375 c.f.s. Such upstream storage had the effect of redncing the inflow to John Martin Reservoir and the total volnme of water that otherwise would have physicaIly spilled from John Martin Reservoir. In order to compensate for reduced inflow to conservation storage (Winter Compact Water account) an adjustment was calculated to determine the amount and timing of additional inflow to John Martin Reservoir that would have occurred but for the upstream storage. A release (transfer) equal to this adjustment was then made from the actively spilling account to conservation storage (Winter Compact Water account). Thus, accruals to conservation storage occurred at the rate of adjusted inflow. Additionally, a release (transfer) from the actively spilling account to the Flood Pool account was made at the rate of physical infloW to the reservoir. Upstream storage continued with minor interruptions from Decemher 15, 1997 through March 31, 1998 during which time the mean daily average flow of the Arkansas at Garden City, Kansas was never less than 200 c.f.s. In this manner spill of the Article III accounts were completed on January 14, 1998 and spill of the Offset account was completed January 17, 1998. At the onset of spill of Article II accounts the total content of such accounts was 213,723.80 a.f. of which 121,439.68 a.f. (56.8%) was in the Kansas account and 92,284.12 a.f. (43.2%) were in Colorado accounts. All water transferred into the Flood Pool account was released from the reservoir at a rate determined by the Corps of Engineers. A total of 106,171 a.f. was released from the Flood Pool