# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-04-27 00:25:26 EDT # # ---------------------------------- WARNING ---------------------------------------- # Some of the data that you have obtained from this U.S. Geological Survey database # may not have received Director's approval. Any such data values are qualified # as provisional and are subject to revision. Provisional data are released on the # condition that neither the USGS nor the United States Government may be held liable # for any damages resulting from its use. # # More data may be available offline. # For more information on these data, contact USGS Water Data Inquiries. # This file contains the annual peak streamflow data. # # This information includes the following fields: # # agency_cd Agency Code # site_no USGS station number # peak_dt Date of peak streamflow (format YYYY-MM-DD) # peak_tm Time of peak streamflow (24 hour format, 00:00 - 23:59) # peak_va Annual peak streamflow value in cfs # peak_cd Peak Discharge-Qualification codes (see explanation below) # gage_ht Gage height for the associated peak streamflow in feet # gage_ht_cd Gage height qualification codes # year_last_pk Peak streamflow reported is the highest since this year # ag_dt Date of maximum gage-height for water year (if not concurrent with peak) # ag_tm Time of maximum gage-height for water year (if not concurrent with peak # ag_gage_ht maximum Gage height for water year in feet (if not concurrent with peak # ag_gage_ht_cd maximum Gage height code # # Sites in this file include: # USGS 01100000 MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA # # Peak Streamflow-Qualification Codes(peak_cd): # 1 ... Discharge is a Maximum Daily Average # 2 ... Discharge is an Estimate # 3 ... Discharge affected by Dam Failure # 4 ... Discharge less than indicated value, # which is Minimum Recordable Discharge at this site # 5 ... Discharge affected to unknown degree by # Regulation or Diversion # 6 ... Discharge affected by Regulation or Diversion # 7 ... Discharge is an Historic Peak # 8 ... Discharge actually greater than indicated value # 9 ... Discharge due to Snowmelt, Hurricane, # Ice-Jam or Debris Dam breakup # A ... Year of occurrence is unknown or not exact # Bd ... Day of occurrence is unknown or not exact # Bm ... Month of occurrence is unknown or not exact # C ... All or part of the record affected by Urbanization, # Mining, Agricultural changes, Channelization, or other # F ... Peak supplied by another agency # O ... Opportunistic value not from systematic data collection # R ... Revised # # Gage height qualification codes(gage_ht_cd,ag_gage_ht_cd): # 1 ... Gage height affected by backwater # 2 ... Gage height not the maximum for the year # 3 ... Gage height at different site and(or) datum # 4 ... Gage height below minimum recordable elevation # 5 ... Gage height is an estimate # 6 ... Gage datum changed during this year # 7 ... Debris, mud, or hyper-concentrated flow # 8 ... Gage height tidally affected # Bd ... Day of occurrence is unknown or not exact # Bm ... Month of occurrence is unknown or not exact # F ... Peak supplied by another agency # R ... Revised # # agency_cd site_no peak_dt peak_tm peak_va peak_cd gage_ht gage_ht_cd year_last_pk ag_dt ag_tm ag_gage_ht ag_gage_ht_cd 5s 15s 10d 6s 8s 33s 8s 27s 4s 10d 6s 8s 27s USGS 01100000 1852-04-23 108000 6,7 60.60 USGS 01100000 1924-04-08 55700 6 53.40 USGS 01100000 1925-03-31 55000 6 53.30 USGS 01100000 1926-04-27 39300 6 50.60 USGS 01100000 1927-03-17 34300 6 49.70 USGS 01100000 1927-11-05 76800 6 56.50 USGS 01100000 1929-05-05 37000 6 50.20 USGS 01100000 1930-04-09 29000 6 48.70 USGS 01100000 1931-06-11 35900 6 50.00 USGS 01100000 1932-04-14 50700 6 52.60 USGS 01100000 1933-04-20 72600 6 56.00 USGS 01100000 1934-04-14 59600 6 54.02 USGS 01100000 1935-01-11 49500 6 52.40 USGS 01100000 1936-03-20 173000 6 68.40 5 1735 USGS 01100000 1937-05-16 39800 6 50.70 USGS 01100000 1938-09-23 121000 6 60.57 USGS 01100000 1939-04-21 48600 6 51.56 USGS 01100000 1940-04-14 55800 6 52.93 USGS 01100000 1941-02-10 19900 6 46.66 USGS 01100000 1942-06-17 27000 6 48.13 USGS 01100000 1943-05-14 27400 6 48.00 USGS 01100000 1944-06-26 49200 6 51.77 USGS 01100000 1945-03-22 39500 6 50.14 USGS 01100000 1945-12-09 36100 6 49.77 USGS 01100000 1947-04-14 31300 6 48.89 USGS 01100000 1948-03-23 51700 6 52.28 USGS 01100000 1949-01-08 24600 6 47.65 USGS 01100000 1950-04-22 34800 6 49.53 USGS 01100000 1951-04-05 53900 6 52.63 USGS 01100000 1952-04-07 53700 6 52.59 USGS 01100000 1953-03-28 56000 6 52.93 USGS 01100000 1954-05-11 47900 6 51.70 USGS 01100000 1954-12-20 27900 6 48.27 USGS 01100000 1956-05-01 46900 2,6 1956-01-10 51.73 1 USGS 01100000 1957-01-25 17200 6 46.16 USGS 01100000 1958-04-25 36400 6 49.82 USGS 01100000 1959-04-05 47400 6 51.62 USGS 01100000 1960-04-06 79000 6 56.00 USGS 01100000 1961-04-25 32000 2,6 USGS 01100000 1962-04-02 51800 6 52.30 USGS 01100000 1963-04-04 37000 6 49.91 USGS 01100000 1964-04-16 34100 6 49.39 USGS 01100000 1965-04-18 18100 6 46.22 USGS 01100000 1966-03-27 25600 6 47.73 USGS 01100000 1967-04-04 39600 6 50.35 USGS 01100000 1968-03-23 44400 6 51.15 USGS 01100000 1969-04-24 44300 6 51.14 USGS 01100000 1970-02-12 42700 6 50.87 USGS 01100000 1971-04-15 31700 6 48.93 USGS 01100000 1972-04-21 36600 6 50.08 USGS 01100000 1973-04-04 44800 6 51.47 USGS 01100000 1973-12-23 46600 6 51.75 USGS 01100000 1975-03-22 35000 6 49.79 USGS 01100000 1976-04-03 42000 6 51.27 USGS 01100000 1977-03-15 58000 6 53.41 USGS 01100000 1978-01-28 50000 6 52.26 2 1978-01-26 52.69 1 USGS 01100000 1979-03-09 43300 6 51.22 USGS 01100000 1980-04-12 40700 6 50.80 USGS 01100000 1981-02-27 47800 6 51.91 USGS 01100000 1982-04-20 36400 6 50.02 USGS 01100000 1983-03-21 53000 6 52.67 USGS 01100000 1984-06-01 60500 6 53.71 USGS 01100000 1985-03-14 24300 6 47.66 USGS 01100000 1986-01-29 42600 6 51.11 USGS 01100000 1987-04-07 84700 6 57.16 USGS 01100000 1988-05-01 36200 6 49.98 USGS 01100000 1989-05-08 35300 6 49.81 USGS 01100000 1990-03-19 37700 6 50.26 USGS 01100000 1990-10-25 32100 6 49.20 USGS 01100000 1992-03-29 24700 6 47.74 USGS 01100000 1993-04-01 50000 6 52.31 USGS 01100000 1994-04-17 33300 6 49.44 USGS 01100000 1994-12-26 31500 6 49.10 USGS 01100000 1996-04-18 54800 6 53.05 USGS 01100000 1996-10-22 48600 6 53.10 USGS 01100000 1998-06-18 50400 6 52.74 USGS 01100000 1999-09-19 33600 6 49.69 USGS 01100000 2000-04-25 33800 6 49.72 USGS 01100000 2001-04-15 40200 6 50.95 USGS 01100000 2002-05-15 25700 6 48.05 USGS 01100000 2003-03-31 37200 6 50.38 USGS 01100000 2004-04-03 50800 6 52.80 USGS 01100000 2005-04-04 50600 6 52.77 USGS 01100000 2006-05-15 96400 6 58.84 USGS 01100000 2007-04-17 89800 6 58.09 USGS 01100000 2008-03-10 37800 6 50.53 USGS 01100000 2008-12-13 39000 6 50.74 USGS 01100000 2010-04-01 63400 6 54.64 USGS 01100000 2011-03-09 39200 6 50.79 USGS 01100000 2011-12-09 34400 6 49.89 USGS 01100000 2012-11-01 28200 6 48.67 USGS 01100000 2014-04-01 37800 6 50.73 USGS 01100000 2014-12-12 29100 6 49.11 USGS 01100000 2016-02-27 35100 6 50.25 USGS 01100000 2017-04-08 35100 6 50.25 USGS 01100000 2017-10-31 20:45 36500 6 50.51 USGS 01100000 2019-04-28 11:08 40700 51.25 USGS 01100000 2019-12-16 12:17 35800 50.37 USGS 01100000 2020-12-27 10:22 35600 6 50.35