Plot last updated at :

                        TWO RIVERS DAM AND RESERVOIR
                                  RIO HONDO
                         DRAINAGE AREA = 1,027 SQ MI

                                                            FLOW IN CFS
                     VOLUME    AREA      ELEV         CONDUIT       SPILLWAYS
                     IN AC-FT  IN ACRES  IN FEET   ROCKY  DIAMOND "A"  
					   (NGVD29)

TOP OF DAM           299,547   7,377     4,054        470    1,280    6270,000


MAXIMUM POOL         263,433   6,792     4,048.9      460    1,235    410,600


SPILLWAY CREST AND
TOP OF FLOOD CONTROL 165,000   4,912      4,032       425    1,112          0

TOP OF SADDLE DIKE    23,864   1,711      3,988       305      726          0


ZERO STORAGE      
      DIAMOND "A"          0       0      3,969       239      456          0
      ROCKY                0       0      3,948        61        0          0


CONDUIT INVERT
       DIAMOND "A"         0       0      3,957         0        0          0
       ROCKY               0       0      3,945         0        0          0

SEDIMENT RESERVE
	1963 INITIAL  18,000 AC-FT
	1971 SURVEY   16,320 AC-FT
	1988 SURVEY   13,898 AC-FT
        2014 LIDAR    15,000 AC-FT

COMMENTS

AUTHORIZED SPACE
FLOOD CONTROL     150,000 AC-FT
SEDIMENT RESERVE   18,000 AC-FT

ALL ELEVATIONS IN NGVD29.  

PROJECT HAS TWO SMALL DAMS:
ROCKY DAM         64 SQ MI DRAINAGE AREA
ADD 2.17 FT TO CONVERT TO NAVD88
DIAMOND "A" DAM  963 SQ MI DRAINAGE AREA
ADD 2.30 FT TO CONVERT TO NAVD88
COMMON POOL ABOVE ELEV. 3,988.00 FEET

1 INCH OF RUNOFF EQUALS 54,773 AC-FT
FLOOD SPACE EQUALS 2.74 INCHES OF RUNOFF
4'X7' GATE AT DIA. " A" NORMALLY SET @ 3'
E-A-C TABLE ADOPTED JANUARY 2023