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 USGS Station 06099500
MARIAS RIVER NEAR SHELBY, MT

MARIAS RIVER BASIN

Latitude: 48^25'38"; Longitude: 111^53'20"
Hydrologic Unit Code: 10030203
Drainage area: 3,242 square miles, of which 518 mi2 is probably noncontributing.
Additional information is available about this station.
Use these links to retrieve Streamflow Hydrograph, or tab-separated ASCII file of monthly data.

Summary of Monthly Flows (1961-90)for Station 06099500

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	     366     203     294     486    0.10
NOV.	     370     232     321     401    0.22
DEC.	     290     193     246     304    0.31
OCT-DEC	     342     211     291     404
CALYEAR	     862     645     813    1019

JAN.	     255     157     207     335    0.40
FEB.	     369     213     283     423    0.49
MAR.	     614     340     492     672    0.73
JAN-MAR	     412     252     382     517
OCT-MAR	     377     243     348     443

APR.	     999     528    1058    1325    0.97
MAY	    2528    1943    2345    3457    2.02
JUNE	    2986    1690    2379    3682    3.03
APR-JUN	    2171    1471    2101    2498

JULY	     892     514     828    1277    3.38
AUG.	     336     212     320     390    3.48
SEP.	     328     180     266     462    3.53
JUL-SEP	     518     317     514     650
APR-SEP	    1344     972    1315    1539

WATYEAR	     861     642     844    1033

Extreme High and Low Monthly and Daily Average Flows for Station 06099500

                    SECOND     THIRD                             SECOND     THIRD                
        MON.  HI.  MON.  HI.  MON.  HI.  DAILY  HI.  MON.  LO.  MON.  LO.  MON.  LO.  DAILY  LO. 
       ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------  
        FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR.  FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR. 
PERIOD  (cfs)      (cfs)      (cfs)      (cfs)       (cfs)      (cfs)      (cfs)      (cfs)      
------ ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
OCT.	1448.   52 1279.   86 1132.   12 2280.   86 101.    37 122.    38 125.    74 59.     36 
NOV.	1485.   90 1400.   34 1122.   35 4580.   90 132.    64 137.    37 160.    36 37.     37 
DEC.	863.    76 842.    90 768.    51 3000.   76 103.    37 104.    84 120.    64 56.     84 
JAN.	700.    18 678.    76 650.    34 2110.   35 41.90   37 90.50   40 96.60   82 20.     37 
FEB.	1173.   86 900.    34 867.    76 14200.  86 58.70   36 70.50   37 96.60   40 25.     37 
MAR.	2300.   47 2203.   72 1500.   28 6000.   78 146.    22 164.    64 180.    13 42.     37 
APR.	3149.   34 2800.   25 2457.    4 8560.    4 280.    31 308.