WSP02795 - Laserfiche WebLink

Home Browse Search

.-I . A)l,ui o.s>h'lhe1 f. .$~ Fr~c'sc.-, h~ /o,/"'r P<_IIq,~ 1, General. During calendar year 1997, activities of the Corps of Engineers, Albuquerque District, in the Arkansas River Basin consisted of reservoir regulation, flood control related studies, flood plain management services, the regulation of dredged or fill materials into waterways and emergency engineering assistance. 2, Flood Control ODerations, In 1997 the Arkansas River snowmelt runoff was approximately 130% of average, Several rainfall events during the snowmelt runoff required flood control operations at Pueblo Reservoir during June. A concentrated rainstorm event above and below John Martin Reservoir resulted in flood operations at John Martin on August 13. Flood control benefits at these reservoirs for 1997 was approximately $2 million. On July 28, 1997 a long-term deviation was approved for Pueblo Reservoir for a period not to exceed 5-years. During this time the Bureau of Reclamation will address concerns about the foundation stability of the dam. The flood control pool will be reduced by approximately 35,000 acre-feet while corrective measures are being completed. 3, Plannina Assistance to States (Section 22) Proaram. Under authority of Section 22 of the Water Resources Development Act of 1974 the Corps is authorized to assist non- Federal entities in the preparation of comprehensive plans for the development, utilization, and conservation of water and related land resources. On August 9, 1996 the U,S. Army Corps of Engineers, Albuquerque District (Corps), in cooperation with the Colorado Water Conservation Board (CWCB) began the first of two studies under Section 22 authority: "Channel Capacity and Riverine Habitat Planning, Arkansas River Below John Martin Dam". The Corps will develop and evaluate potential maintenance plans which will provide long- term improvement of channel capacity and restoration of riverine habitat for the Arkansas River from John Martin Dam to the Colorado/Kansas state line, A geomorphological assessment of river processes was conducted in 1997 to identify long-term hydraulic conveyance changes downstream from John Martin Dam, The Corps also initiated analysis of existing sedimentation information for the reach. Hydraulic analysis is pending completion of digitized cross sections for the five identified problem areas. This lower reach study will be completed by March 1998. The second study will include the upper reach of the Arkansas River from John Martin Reservoir upstream to the Pueblo, Colorado area, The u.s, Geological Survey (USGS), the Corps, and the CWCB will cooperate on this study effort, The Corps will determine 1 IG39