11250100 MILLERTON LAKE AT FRIANT, CA
LOCATION.-Lat 37°00'00", long 119°42'13", in SW 1/4 SW 1/4 sec.5, T.11 S., R.21 E., Fresno County,
Hydrologic Unit 18040006, near center of Friant Dam, on San Joaquin River, just upstream from Cottonwood Creek,
0.9 mi northeast of Friant.
DRAINAGE AREA.-1,638 mi2.
PERIOD OF RECORD.-October 1941 to current year. Monthend contents only for some periods, published in WSP 1315-A.
GAGE.-Water-stage recorder. Datum of gage is sea level (levels by U.S. Bureau of Reclamation). Prior to May 29,
1944, nonrecording gage on left bank at same datum.
REMARKS.-Reservoir is formed by gravity-type concrete dam with spillway near center, completed in December 1942.
Control valves installed in February 1944, and spillway gates installed in November 1947. Usable capacity,
503,200 acre-ft between elevations 375.4 ft, invert of river outlet, and 578.0 ft, top of drum-type spillway
gates. Not available for release, 17,400 acre-ft. Millerton Lake is one of the storage units in the Central
Valley Project. Records, including extremes, represent total contents at 2400 hours. See schematic diagram of
lower San Joaquin River Basin.
COOPERATION.-Records and capacity table were provided by U.S. Bureau of Reclamation.
EXTREMES FOR PERIOD OF RECORD.-Maximum contents, 528,800 acre-ft, July 21, 1998, elevation, 579.68 ft, (maximum
instantaneous contents, 530,500 acre-ft, at 1300 hours, Jan. 3, 1997, elevation 580.01 ft); minimum since lake
first filled, 133,600 acre-ft, Apr. 11, 1969, elevation, 467.81 ft.
EXTREMES FOR CURRENT YEAR.-Maximum contents, 523,900 acre-ft, June 16, elevation, 578.68 ft; minimum, 227,400
acre-ft, Sept. 2, elevation, 503.93 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on table provided by U.S. Bureau of Reclamation, dated 1921)
400 36,400 440 83,300 480 161,700 520 279,400 560 436,500
420 57,000 460 117,500 500 215,000 540 353,000 580 530,400
RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 437600 382400 418000 420500 458700 429900 461100 514800 523400 505500 317800 228500
2 437200 383500 417000 420900 458700 431500 464200 514300 523500 502300 313300 227400
3 436200 385500 416200 422100 458700 433200 465900 514700 523100 498400 308700 228100
4 434900 386700 416400 422200 457700 434000 466000 514900 522400 494100 303800 229500
5 435100 387900 415400 423200 456100 435000 467600 515400 522200 489900 299000 231400
6 435100 389200 414600 423400 454600 435300 469900 515500 521600 486400 295200 232000
7 434500 390900 414500 422900 453900 436300 472100 515800 521600 481000 291900 233000
8 434300 392600 414300 423400 454800 436800 474600 516600 521000 474700 288600 234000
9 434400 394300 413900 423800 455900 437200 477600 517000 520400 468100 285100 234800
10 434400 396300 412100 424900 456700 437600 480900 517000 520300 462000 280700 235900
11 433500 397600 410000 426000 457000 437900 483800 516600 520000 455800 277300 238500
12 433700 399400 409700 426700 457700 438200 486900 516700 521600 449600 273500 240100
13 432200 401500 409400 427400 457800 438900 489800 517300 522100 443700 270700 242600
14 428900 403200 408900 427500 458200 439700 491800 518900 522800 435200 268600 244000
15 425600 404900 410000 426800 456300 440100 496000 519600 522500 426500 266600 243900
16 423200 407700 410000 425900 454900 440400 500100 519400 523900 418300 264000 242800
17 420500 410000 411100 425100 453500 442200 503900 518400 523800 410800 261100 241800
18 417500 411200 411500 426300 451600 443900 506700 517600 523100 402900 257600 240600
19 414200 413300 411800 426600 449400 445300 509600 516200 521200 396000 253300 239300
20 410900 415600 412000 428000 447000 447500 513000 515300 520400 390100 250100 238500
21 407600 418100 413700 431500 444700 449300 515400 515900 519700 383600 248400 237900
22 404000 420400 415300 435000 442600 450300 515700 516300 518800 376400 246400 238400
23 401100 422600 416500 439100 439300 450700 515300 516600 516700 370000 245100 238700
24 398000 422700 417100 443800 436500 451900 515400 516700 515800 363700 243500 240000
25 394700 422000 417000 446400 433700 453200 515000 516400 515000 356200 242100 242000
26 391900 419200 416700 448300 430900 454000 514300 515300 514800 350500 239200 243200
27 389300 417600 415400 451200 429000 455000 514200 514200 513400 343600 238100 241800
28 386700 418300 415800 453300 428000 455900 514000 513100 512000 337300 237900 240100
29 384300 417100 416800 455000 --- 456600 513300 516800 510400 330600 235600 237300
30 382400 418200 417400 456200 --- 456800 513300 520100 508400 325100 232700 234900
31 382400 --- 417700 457700 --- 458700 --- 522100 --- 320200 230800 ---
MAX 437600 422700 418000 457700 458700 458700 515700 522100 523900 505500 317800 244000
MIN 382400 382400 408900 420500 428000 429900 461100 513100 508400 320200 230800 227400
a 547.34 555.82 555.72 564.73 558.08 564.95 576.53 578.32 575.52 531.42 505.05 506.37
b -55600 +35800 -500 +40000 -29700 +30700 +54600 +8800 -13700 -188200 -89400 +4100
CAL YR 1998 b +199600
WTR YR 1999 b -203100
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