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J ~ , , Senate Bill 82-87 authorized a $1,134,500 appropnatlOn from the CWCB Construction Fund to the District to substantially rehabilitate the Reservoir's downstream _ outlet gates in order to meet federal and state dam safety standards. The release capacity of the gates is approximately 3,000 cfs, however the theoretical capacity of the outlet tunnel is approximately 2,500 cfs. The 1987 rehabilitation did not modify the Reservoir's outlet tunnel downstream of the gates. A one-year deferral was requested by the District and granted by the Board for the District's 1986 $30,014 loan payment of Contract C153386. A one-year deferral was also requested by the District and granted by the Board for the District's 1988 $30,660 loan payment of Contract C 153478. The requests were due to construction cost overruns and time delays. The Board granted the deferment requests with no interest charge, thereby extending the loan payback period to 41 years. In the summer of 1993, the State Engineer's Office placed a storage restriction on the Reservoir due to seepage from the left abutment. As a result of the restriction, the District undertook measures to contain the seepage and drain the abutment. The total cost of the repair work was approximately $77,000. In September of 1993, as a result of the unexpected costs incurred by the repair work, the District requested the CWCB grant a deferment of its two 1993 contract loan payments. The Board granted the deferment requests with no interest charge, thereby extending the loan payback period to 42 years. In the 1997 runoff season, severe vibrations and noise originating from the outlet works were reported when releases exceeded 1,500 cfs. Subsequent inspections revealed _ damage to the Reservoir's outlet works created by the turbulent hydraulic conditions in _ . the outlet tunnel. In 1997 the District made tunnel repairs at a cost of $75,000. The outlet works repairs in 1997 have performed poorly, necessitating another extensive repair project in 1999, and subsequently the District's third request for a loan payment deferral for each of the two original project contracts. Apparently a flow restriction at the downstream end of the outlet tunnel is the cause of the problem. The tunnel has never been and cannot easily be enlarged due to the proximity of the tunnel portal to the toe of the dam. The problems associated with the outlet tunnel capacity and the resulting limitations in safely satisfying downstream Compact obligations has caused the District and the Division of Water Resources to enter into a May 12, 1999 Memorandum of Understanding regarding the Reservoir operations. The San Luis Valley Irrigation District currently has three loans with the CWCB as shown below: Loan Date of Current Annual Due Number Contract Princioal Terms Balance Payment Date CI533l8 9/14/79 $ 90,000 3%-40 yrs $ 60,019 $ 3,893 Aug. CI53386 6/1/82 $513,805 5%-40 yrs $430,695 $30,014 Aug. e C153478 10/1/86 $526,087 5%-40 yrs $476,769 $30.660 Dec.