# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-04-25 22:32:35 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 Maryland 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 01589000 PATAPSCO RIVER AT HOLLOFIELD, MD # # 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 01589000 1933-08-00 36000 2,7,Bd 19.50 Bd USGS 01589000 1945-07-18 9700 9.01 USGS 01589000 1946-06-02 13500 11.62 USGS 01589000 1947-05-19 4540 5.89 USGS 01589000 1948-01-01 7080 7.38 USGS 01589000 1948-12-30 4540 5.91 USGS 01589000 1950-09-10 7590 7.71 USGS 01589000 1951-02-07 6060 6.81 USGS 01589000 1952-05-26 12300 10.69 USGS 01589000 1952-11-22 10800 9.72 USGS 01589000 1954-05-04 2900 4.80 USGS 01589000 1955-08-13 7860 6 7.86 USGS 01589000 1956-07-21 19000 6 15.88 USGS 01589000 1957-09-13 3260 6 5.06 USGS 01589000 1957-12-21 2830 6 4.75 USGS 01589000 1959-09-02 2840 6 4.76 USGS 01589000 1960-09-12 1940 6 4.06 USGS 01589000 1961-02-25 2200 2,6 USGS 01589000 1962-02-26 1800 6 4.01 USGS 01589000 1963-03-06 2570 6 4.56 USGS 01589000 1964-01-09 3960 6 5.54 USGS 01589000 1965-03-05 1920 6 4.04 USGS 01589000 1966-02-13 2980 6 4.86 USGS 01589000 1967-08-27 5240 6 6.32 USGS 01589000 1968-09-11 3900 6 5.50 USGS 01589000 1969-09-04 2360 6 4.40 USGS 01589000 1970-07-10 1670 6 3.83 USGS 01589000 1971-09-12 12700 6 11.01 USGS 01589000 1972-06-22 80600 5 31.30 1868 USGS 01589000 1972-12-08 4900 6 7.00 USGS 01589000 1974-03-30 2870 6 5.69 USGS 01589000 1975-09-26 46500 6 22.80 USGS 01589000 1976-01-01 6330 6 7.14 USGS 01589000 1976-10-09 3150 6 5.25 USGS 01589000 1978-01-26 6770 6 7.50 USGS 01589000 1979-09-06 10500 6 9.51 USGS 01589000 1979-10-01 9900 6 9.20 USGS 01589000 1981-06-14 5680 6 6.82 USGS 01589000 1982-02-03 2950 6 5.64 USGS 01589000 1983-04-15 4450 6 6.06 USGS 01589000 1984-07-01 6270 6 7.19 USGS 01589000 1985-02-12 7950 6 8.19 USGS 01589000 1986-04-16 890 6 3.21 USGS 01589000 1987-09-08 3740 6 5.60 USGS 01589000 1988-01-20 6940 6 7.60 USGS 01589000 1989-05-06 11800 6 10.22 USGS 01589000 1989-11-16 2960 6 5.09 USGS 01589000 1990-10-23 7410 6 7.88 USGS 01589000 1994-04-14 1570 6 3.99 USGS 01589000 2001-06-23 03:00 3410 6 5.30 USGS 01589000 2001-11-25 19:45 714 6 3.04 USGS 01589000 2003-09-23 13:00 9010 6 8.78 USGS 01589000 2003-12-11 11:00 14800 6 11.62 USGS 01589000 2010-04-25 23:00 1830 6 4.01 USGS 01589000 2011-09-07 18700 6 12.62 USGS 01589000 2011-11-23 6100 6 6.89 USGS 01589000 2013-01-31 05:30 14400 2,6 10.85 2 2013-01-31 0800 12.29 1 USGS 01589000 2014-04-30 20300 6 13.25 USGS 01589000 2015-06-27 20:45 6770 6 7.26 USGS 01589000 2016-07-30 22800 6 14.24 USGS 01589000 2017-05-25 21:30 1920 6 4.06 USGS 01589000 2018-06-03 20:45 12100 6 9.87 USGS 01589000 2018-12-16 05:15 8340 6 8.08 USGS 01589000 2019-11-01 05:00 5900 6 6.78 USGS 01589000 2021-09-23 13:30 3570 6 5.32