Water Resources of Alaska


15290000 LITTLE SUSITNA RIVER NEAR PALMER  
 LOCATION.--Lat 61" "42'37", long 149" "13'47", in SE1/4 NW1/4 sec.26, T.19 N., R.1 E. (Anchorage C-6 quad.), 
 Matanuska-Susitna Borough, Hydrologic Unit 19020505, on right bank 100 ft downstream from highway bridge on
 Wasilla-Fishhook Road, 1.5 mi north of road junction, 1.8 mi downstream from unnamed tributary, and 8 mi
 northwest of Palmer. Prior to Oct. 1, 1991 at site 60 ft upstream.  

 DRAINAGE AREA.--61.9 mi2.  


 PERIOD OF RECORD.--July 1948 to current year. Low-flow records not equivalent prior to January 1962 because
 most measurements below 300 ft3/s were made at site 3.4 mi downstream.  

 GAGE.--Water-stage recorder. Datum of gage is 916.6 ft above sea level (river-profile survey). Prior to Aug.
 16, 1948, non-recording gage and Aug. 17, 1948 to May 15, 1972, water-stage recorder on left bank; 
 water-stage recorder on right bank, May 16, 1972 to Sept. 30, 1991, at sites 60 ft upstream. Prior to Oct.
 1, 1974, at datum 4.00 ft higher; Oct. 1, 1974 to Sept. 30, 1991, at datum 2.00 ft higher.  

 REMARKS.--Records good below 700 ft3/s and poor above, except for estimated daily discharges, which are poor.
 GOES satellite telemetry at station.   

 EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 1,200 ft3/s and maximum (*).  

------------------------------------------------------------------------
" "Date" "    Time  Discharge  Gage Height   Date  Time  Discharge  Gage height  
              (ft3/s)    (ft                       (ft3/s)    (ft)         
------------------------------------------------------------------------
June 1  2230  796*        5.01*                                            
------------------------------------------------------------------------

                    DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996  
                                                DAILY MEAN VALUES  

   DAY      OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP  
    1       192       72      e46      e32      e26      e20      e17       49      512      192      390      271  
    2       180       68      e46      e32      e26      e20      e17       57      521      180      459      244  
    3       171       56      e46      e32      e26      e20      e16       66      445      179      367      226  
    4       164      e50      e44      e32      e26      e20      e16       87      410      182      314      214  
    5       158      e45      e44      e30      e24      e20      e16      118      341      175      343      204  
    6       151      e50      e44      e30      e24      e20      e16      134      311      165      312      192  
    7       146      e55      e44      e30      e24      e19      e16      150      329      161      279      183  
    8       140      e55      e44      e30      e24      e19      e16      160      289      181      253      174  
    9       134      e55      e42      e30      e24      e19      e16      172      253      178      243      164  
   10       128      e55      e42      e30      e22      e19      e16      176      247      160      402      156  
   11       123      e55      e42      e30      e22      e19      e17      223      229      152      339      149  
   12       117      e55      e42      e30      e22      e18      e17      307      205      145      302      150  
   13       114      e55      e40      e30      e22      e18      e18      364      245      158      281      143  
   14       106      e55      e40      e30      e22      e18      e18      361      239      230      262      138  
   15       110      e55      e40      e28      e22      e18      e19      289      250      187      244      131  
   16       103      e55      e40      e28      e22      e18       21      227      268      170      236      129  
   17        98      e55      e38      e28      e22      e18       23      191      274      170      245      123  
   18       100      e55      e38      e28      e22      e18       28      189      263      175      229      118  
   19        96      e50      e38      e28      e22      e18       30      198      257      180      214      112  
   20        93      e50      e38      e28      e22      e17       30      189      239      183      203      109  
   21        93      e50      e36      e28      e22      e17       37      160      234      169      195      121  
   22        89      e50      e36      e28      e22      e17       37      167      241      168      199      111  
   23        91      e50      e36      e28      e22      e17       33      199      253      165      184      103  
   24        86      e50      e36      e28      e22      e17       36      175      254      164      178      100  
   25        83      e48      e34      e28      e22      e17       36      191      229      175      218      119  
   26        80      e48      e34      e26      e22      e17       41      201      201      170      287      111  
   27        77      e48      e34      e26      e20      e17       38      186      176      158      243      108  
   28        74      e48      e34      e26      e20      e17       34      172      166      153      221      101  
   29        73      e46      e34      e26      e20      e17       35      207      205      183      259       95  
   30        71      e46      e32      e26      ---      e17       38      327      179      578      277       95  
   31        71      ---      e32      e26      ---      e17      ---      407      ---      385      274      ---  
  TOTAL    3512     1585     1216      892      658      563      748     6099     8265     5971     8452     4394  
  MEAN      113     52.8     39.2     28.8     22.7     18.2     24.9      197      275      193      273      146  
  MAX       192       72       46       32       26       20       41      407      521      578      459      271  
  MIN        71       45       32       26       20       17       16       49      166      145      178       95  
  AC-FT    6970     3140     2410     1770     1310     1120     1480    12100    16390    11840    16760     8720  
  CFSM     1.83      .85      .63      .46      .37      .29      .40     3.18     4.45     3.11     4.40     2.37  
  IN.      2.11      .95      .73      .54      .40      .34      .45     3.67     4.97     3.59     5.08     2.64  
  e  Estimated  

  STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 1996, BY WATER YEAR (WY)#  
   MEAN      139     62.1     39.5     30.4     24.4     19.9     24.9      223      671      512      413      305  
   MAX       391      134     61.7     54.1     41.2     29.7     68.0      649     1215     1047      909      651  
   (WY)     1984     1980     1980     1961     1982     1991     1990     1990     1977     1963     1971     1985  
   MIN      51.3     24.5     17.4     17.5     14.0     10.0     10.0     52.9      275      193      169     82.2  
   (WY)     1969     1969     1955     1959     1952     1956     1955     1971     1996     1996     1969     1969  

   SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1948 - 1996#  
   ANNUAL TOTAL                       68074                      42355  
   ANNUAL MEAN                          187                        116                        206  
   HIGHEST ANNUAL MEAN                                                                        316              1949  
   LOWEST ANNUAL MEAN                                                                          95.8            1969  
   HIGHEST DAILY MEAN                  1300     Jun 12             578     Jul 30            5040       Aug 10 1971  
   LOWEST DAILY MEAN                    a22     Mar 26             b16     Apr  3              c8.0     Apr  1 1956  
   ANNUAL SEVEN-DAY MINIMUM              22     Mar 26              16     Apr  3               8.0     Apr  1 1956  
   INSTANTANEOUS PEAK FLOW                                         796     Jun  1           d7840       Aug 10 1971  
   INSTANTANEOUS PEAK STAGE                                          5.01  Jun  1             f13.00    Aug 10 1971  
   ANNUAL RUNOFF (AC-FT)             135100                      84130                     148900  
   ANNUAL RUNOFF (CFSM)                   3.02                       1.87                       3.32  
   ANNUAL RUNOFF (INCHES)                40.95                      25.49                      45.11  
   10 PERCENT EXCEEDS                   431                        258                        578  
   50 PERCENT EXCEEDS                    77                         67                         70  
   90 PERCENT EXCEEDS                    26                         19                         20  
  #  See Period of Record for remark on low-flow records; partial years used in monthly statistics.  
  a  Mar. 26 to Apr. 2.  
  b  Apr. 3-10.  
  c  Apr. 1-20, 1956 and Mar. 11, 12, 1957.  
  d  From rating curve extended above 4,600 ft3/s on basis of slope-area measurement of peak flow.  
  f  Gage height about 13.0 ft, from floodmarks; 9.84 ft, in gage well; 12.30 ft, at top of needle peak in gage well;  
  at prior datum (WY 1974-91) at sites then in use.  
  

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Last Modified: June 29, 2001

U.S. Department of the Interior
U.S. Geological Survey
U.S. Geological Survey Water Resources