Plot last updated at : 00:11 hrs - Fri, 21 Mar 2025

                              COCHITI DAM AND LAKE
                                   RIO GRANDE
                           DRAINAGE AREA = 11,695 SQ MI

                            VOLUME     AREA     ELEV.        FLOW IN CFS
                           IN AC-FT   IN ACRES  IN FEET    OUTLET  SPILLWAY
TOP OF DAM                 766,819    11,700    5,479.0    19,200  195,000
                                                        
MAXIMUM POOL               710,815    11,147    5,474.1    18,990  136,400
                                                        
SPILLWAY CREST AND TOTAL   570,192     9,462    5,460.5    18,450   19,500
FLOOD CONTROL                                           
                                                        
SPILLWAY NOTCH CREST       478,193     8,083    5,450.0    17,700   0

BOTTOM SUMMER FLOOD POOL   294,016     5,303    5,422.0    16,500   0
                                                        

SEDIMENT RESERVE
INITIAL                    105,000 
1978 SURVEY                103,800 
1981 SURVEY                 95,950
1986 SURVEY                 91,374
1991 SURVEY                 86,514
1998 SURVEY                 78,640
2012 SURVEY                 69,902
2017 SURVEY                 62,868

RECREATION POOL             44,129     1,200   5,345.47    12,000   0

CONDUIT INVERT                   0         0   5,255.00    0        0

ZERO STORAGE                     0         0   5,255.00    0        0

COMMENTS
VERTICAL DATUM - NGVD 1929
DATUM CONVERSION FROM NGVD29 TO NAVD88 - ADD 2.82 FT TO NGVD29 ELEVATIONS
1 INCH OF RUNOFF EQUALS 623,733 AC-FT
FLOOD SPACE EQUALS 0.84 INCHES OF RUNOFF
A-C TABLE ADOPTED JANUARY 2020
BECAME OPERATIONAL 1975

                      Sediment Deposits
Date of survey   Period   Period     Average
                 Years    Total      Annual
                 (yrs)   (ac-ft)   (ac-ft/yr)
   APR 72          -        -           -
   APR 76         4.00      -           -
   APR 78         2.08    1,623        780
   OCT 81         2.33   -9,861     -4,232
   OCT 86         5.00    3,325        665
   JUN 91         4.66    4,860      1,043
   JUN 98         7.00    7,874      1,125
   JUN 12        14.00    8,738        624
   SEP 17         5.25    7,034      1,340
APR 76 - Monuments established and ranges surveyed but changes in storage
capacities and surface areas not calculated.
Oct 81 - Reflects the effect of construction material from borrow areas and 
the Santa Fe River conveyance channel.