WSP03137 - Laserfiche WebLink

Home Browse Search

flood control. The flood cont:l.'u'l portion was designed to reduce""sny flo~ of record to les8 than 10,000 cubic feet per second. The record flood of 1921 produoed a peak flow, at the dam site of approximately 170,000 cubic feet per second. It can be seen that, should any future flood approach this magnitude, much benefit will accrue tc citizens of both Coloraao and Kansas. It has been-emphasized by sume proponents of the pool that recreation facilities were not properly oonsidered during the discussions leading to the Colorado-Kansas Compact. However, it would seem from the record that during the eighth meeting of the Colorado_ Kansas Arkansas River Compaot Commission, held in Denver on,April 10-11, 1947, the question of a permanent pool was disposed of with finality. Attending this meeting were Mr. C. N. Feast, then Director of the Colorado State Game and Fish Commission, Mr. E. B. nebler, appearing as a representative of the Department of Interior, and Mr. R. A. Sohmidt, Assist- ant Regional Direotor of the Fish and Wild Life Service. A statement made by Mr, Feast, with which Mr. Debler and Mr. Schmidt concurred, effectively ended any consideration of a permanent pool in John Martin Reservoir. The statement may be found on page 8 _ 53 of the Record. The Colorado - Kansas Arkansas River Comnact Oommission. The substanca of the statement was that lithe phySical oharacteristios of a 10,000 acre foot pool above that dam would be oompletely of no value to the fish and wildlife ---_,.. . The idea was abandoned not only because of the physical characteriatics but also of the cost of operation and mainten_ ance and the fact that a permanent pool might cause future controversy between Colorado and Kansas. As a part of the project Lake Hasty, a 75 acre lake resulting from borrow excavation down stream from the dam, has been developed as the recreational center. This center has been developed and maintained with public funds and has well ~erved the general public. Sedlmentatlan The resurvey of August, 1957, showed tJ)(~ total deposition of'sediment to be 56,263 acre feet. Of this amount 96 aore feet was in the flood control pool and 56,167 acre fee~ was in the irrigation pool. However, 11,430 acre feet was deposited before construction was completed and prior to the time storage was started in late 1942. This leaves a net 10S8 of 44,747 aore feet from the conservation pool since storage has begun. The data was obtained from a report compiled by the Oorps of Engineers entitled ~rt on Sedimenta- tion. John Martin Reservoir. Resurvev of AURUst. lq~7. In the report named above, the trap efficiency of the Reservoir is diecussed. Trap efficiency is the percentage of total sediment retained in the Reservoir, as obtained from the 'sediment ra,ta!ned divided by sediment inflow. This report shows the average trap efficiency to be about 89 per cent. In addition to the overall trap efficiency a separate trap effioiency dm-ing empty reservoir periods was computed by the Corps of Engineers. The average trap efficienoy for these periods before 1951 was 25 per cent and for the period -- Page 2 --