Plot last updated at : 15:30 hrs - Mon, 20 Oct 2025

                           SANTA ROSA DAM AND LAKE
                                PECOS RIVER
                         DRAINAGE AREA = 2,434 SQ MI

                        VOLUME         AREA       ELEV.      FLOW IN CFS
                        IN ACRE-FEET   IN ACRES   IN FEET    OUTLET  SPILLWAY
						    (NAVD88)

TOP OF DAM              801,174        16,906     4,826.11   6,300   374,000

MAXIMUM DESIGN POOL (1) 777,751        16,555     4,824.71   6,100   353,000

TOP OF FLOOD CONTROL    432,165        10,619     4,799.11   5,800         0
AND SPILLWAY
CREST

TOP OF CONSERVATION     253,470         7,022     4,778.61   5,300         0

2024 CONSERVATION   (2) 102,369         3,884     4,750.02   4,800         0
ENTITLEMENT

ZERO STORAGE                  0            0      4,668.00       0         0

CONDUIT INVERT                0            0      4,632.11       0         0

STREAMBED	                  0            0      4,618.11       0         0

SEDIMENT RESERVE
	1979 INITIAL  82,000 AC-FT
	1987 SURVEY   74,773 AC-FT
	1996 SURVEY   73,277 AC-FT
	2015 SURVEY   67,015 AC-FT

COMMENTS

AUTHORIZED SPACE
TOTAL IRRIGATION         200,000 AC-FT 
FLOOD CONTROL SPACE      167,000 AC-FT
SEDIMENT RESERVE          82,000 AC-FT

1 INCH OF RUNOFF EQUALS 129,813 AC-FT
FLOOD CONTROL SPACE EQUALS 1.39 INCHES OF RUNOFF
E-A-C TABLE ADOPTED JANUARY 2017

(1) MAXIMUM DESIGN POOL ELEVATION BASED ON THE SUPERSEDED 1980 PMF STUDY 
    USED TO DEVELOP THE MODIFIED SPILLWAY DESIGN. THE SANTA ROSA DAM
    PROBABLE MAXIMUM FLOOD DETERMINATION, DATED DECEMBER 2008, REVISED 
    AUGUST 2013, PRODUCED A COMPUTED MAXIMUM POOL ELEVATION OF 4,821.4 
    FEET.
(2) CALCULATED ANNUALLY. PER 2017 EAC, ACTUAL STORAGE AT ELEVATION
    4,750.02 IS 102,363 AC-FT.
	
ALL ELEVATIONS IN NAVD88. SUBTRACT 2.11 FEET TO CONVERT ELEVATIONS TO NGVD29