05131870 - BIG FORK RIVER NEAR EFFIE, MN Streamflow potentially affected by regulation1 - No Location.-- latitude 47o57'13" longtitude 93o45'16" Measure number Date Time Discharge, in ft^3;/s Base Flow2 1 1970-07-28 Not Available 195.0 No 2 1970-08-11 Not Available 160.0 No 3 1970-09-29 Not Available 187.0 No 4 1971-08-04 13:20 188.0 No 5 1971-09-14 8:15 169.0 No 6 1972-06-06 14:50 445.0 No 7 1972-08-30 15:40 472.0 No 8 1975-08-18 16:35 570.0 No 9 1976-06-02 14:05 263.0 No 10 1976-08-19 11:25 83.6 No 11 1976-09-15 11:35 50.7 Not Determined 12 1980-05-13 11:10 568.0 No 13 2006-09-06 13:40 57.0 Yes Notes: 1 Regulation includes human influences on streamflow from causes such as hydropower, reservoirs, water supplies, or wastewater discharges. 2 Base flow is defined as a period of at least 10-14 days without precipitation that produces detectable runoff.