10344490  BOCA RESERVOIR NEAR TRUCKEE, CA

LOCATION.--Lat 39°23'20", long 120°05'43", in NE 1/4 NW 1/4 sec.28, T.18 N., R.17 E., Nevada County, Hydrologic
   Unit 16050102, in control house at Boca Dam on Little Truckee River, 1,800 ft upstream from mouth, and 6.3 mi
   northeast of Truckee.
DRAINAGE AREA.--172 mi2.
PERIOD OF RECORD.--December 1938 to current year.  Prior to October 1976 published as "at Boca."  Monthend
   contents only for December 1938 to September 1957, published in WSP 1734.

REVISED RECORDS.--WSP 1634:  Drainage area.
GAGE.--Pressure gage with mercury column read most days.  Datum of gage is sea level (levels by U.S. Bureau of
   Reclamation).

REMARKS.--Reservoir is formed by earthfill, rock-faced dam.  Storage began Dec. 8, 1938.  Usable capacity,
   40,868 acre-ft between elevations 5,521 ft, outlet sill, and 5,605 ft, top of spillway gates.  Elevation of
   spillway (gate open) is 5,589.01 ft.  Dead contents, 241 acre-ft.  Records, including extremes, represent
   usable contents at 0800 hours.  Water is used for irrigation in the State of Nevada and for power development.
   See schematic diagram of Truckee River basin.
COOPERATION.--Records and capacity table were provided by U.S. Bureau of Reclamation; not rounded to
   U.S. Geological Survey standards.

EXTREMES (at 0800) FOR PERIOD OF RECORD.--Maximum contents, 41,440 acre-ft, Dec. 23, 1955, elevation,
   5,605.55 ft; minimum, 37 acre-ft, Mar. 4-9, 1955, elevation, 5,521.65 ft.
EXTREMES (at 0800) FOR CURRENT YEAR.--Maximum contents observed, 39,897 acre-ft, June 11, 12, elevation,
   5,604.00 ft; minimum, 17,775 acre-ft, Nov. 26, elevation, 5,576.65 ft.

                         Capacity table (elevation, in feet, and contents in acre-feet)
                  (Based on table provided by U.S. Bureau of Reclamation, dated November 1970)

                                 5,540     2,356              5,570    13,768
                                 5,545     3,513              5,580    20,002
                                 5,550     4,970              5,590    27,488
                                 5,555     6,725              5,600    36,128
                                 5,560     8,778              5,605    40,868

                    RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
                                        DAILY OBSERVATION AT 0800 HOURS

DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1     28968    20800    18073    22371    28305    32632    32501    37286    38842    38747    37640    27895
  2     28594    20590    18098    22444    28553    32632    32632    37567    38794    39300    37660    27528
  3     28305    20382    18163    22553    28760    32675    32588    37801    38747    39224    37426    27164
  4     28017    20140    18228    22663    29009    32763    32588    37895    38937    38604    37193    26803
  5     27772    19968    18294    22847    29428    32807    32544    37989    39080    37895    36867    26444

  6     27488    19763    18359    23068    29935    32807    32501    38131      ---    37197    36497    26048
  7     27205    19559    18392    23290    30746    32894    32501    38225    39608    36082    36220    25694
  8     26963    19390    18491    23551    32109    32938    32457    38320      ---    34943    35944    25343
  9     26723    19255    18556      ---    32414    32938    32457    38414      ---    34403    35670    24995
 10     26444    19188    18589    23889    32457    32894    32414    38414    39849    34358    35351    24649

 11     26206    19088    18655    23889    32544    32938    32894    38462    39897    34358    35034    24382
 12     25930    19021    18854    23852    32632    32938    33379    38462    39897    34898    34717    24116
 13     25694    18921    19559    23664    32894    32894    33511    38462    39656    35260    34448    23965
 14     25499    18854    20002    23513    32982    32763    33644    38509    39416    35624    34179    24045
 15     25305    18755    20278    23328    32982    32894    33778    38509    39205    36036    33867    24182

 16     25150    18655    20625    23179    33026    32851    33956    38747    38947    36036    33556    24078
 17     24956    18524    20905    23290    33158    32807    34224    38794    38652    35944    33202    23814
 18     24802    18425    21222    23551    33202    32807    34403    39080    38320    35899    32851    23551
 19     24572      ---    21364    23965    33379    32851    34582    38937    37989    35944    32501    23253
 20     24344    18261    21506    24344    33556    32938    34717    38890    37426    35944    32153    22994

 21     24040    18196    21578    24764    33070    32851    34853    38842    37333    35990    31807    22700
 22     23776    18098    21649    25188    32414    32763    34943    38794    37146    36128    31481    22444
 23     23514    18001    21721    25499    32414    32588    35034    38794    37006    36266    31134    22153
 24     23216    17936    21792    25812    32457    32414    35260    38842    36774    36543    30789    21828
 25     22920    17839    21864    26206    32501    32153    35533    38842    36774    36821    30403    21471

 26       ---    17775    21936    26484    32544    32283    35761    38747    36960    37053    30062    21116
 27     22334    17839    22008    26923    32588    32326    36128    38699    37379    37333    29723    20800
 28     21972    17904    22044    27164    32719    32501    36497    38842      ---    37613    29386    20451
 29     21685    17965    22117    27447    32719    32501    36821    38842      ---    37707    29009    20106
 30     21364    17965    22189    27732      ---    32501    37053    38842    38272    37660    28635    19831
 31     21046      ---    22298    28058      ---    32501      ---    38842      ---    37613    28264      ---

MAX       ---      ---    22298      ---    33556    32938    37053    39080      ---    39300    37660    27895
MIN       ---      ---    18073      ---    28305    32153    32414    37286      ---    34358    28264    19831
 a    5581.50  5576.95  5583.25  5590.70  5596.20  5595.95  5601.00  5602.90  5602.30  5601.60  5590.95  5579.70
 b      -8256    -3081    +4333    +5760    +4661     -218    +4552    +1789     -570     -659    -9349    -8433

CAL YR 1995  b +13186
WTR YR 1996  b  -9471

  a Elevation, in feet, at end of month.
  b Change in contents, in acre-feet.