# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-11-25 05:20:49 EST # # ---------------------------------- 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 02057000 BLACKWATER RIVER NEAR UNION HALL, VA # # 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 02057000 1890-06-00 18.30 Bd USGS 02057000 1925-04-29 1070 3.85 USGS 02057000 1926-01-18 1840 5.00 USGS 02057000 1926-12-25 6400 11.00 USGS 02057000 1928-08-11 18000 19.50 USGS 02057000 1929-06-09 2800 6.50 USGS 02057000 1929-10-02 8730 12.70 USGS 02057000 1931-08-22 2490 6.12 USGS 02057000 1932-03-06 2560 6.22 USGS 02057000 1932-10-17 12500 15.27 USGS 02057000 1934-03-28 3190 7.09 USGS 02057000 1935-09-06 4800 9.36 USGS 02057000 1936-01-19 5200 9.87 USGS 02057000 1936-10-17 5440 10.15 USGS 02057000 1937-10-19 13400 15.88 USGS 02057000 1939-08-19 17900 18.50 USGS 02057000 1940-08-14 19700 19.52 USGS 02057000 1941-04-05 2190 5.77 USGS 02057000 1942-05-22 5220 9.28 USGS 02057000 1943-07-10 9480 13.25 USGS 02057000 1944-09-18 5530 10.00 USGS 02057000 1945-09-18 8350 12.80 USGS 02057000 1946-01-07 2860 6.66 USGS 02057000 1947-06-14 3130 6.98 USGS 02057000 1948-06-18 3770 7.92 USGS 02057000 1949-03-23 8610 12.90 USGS 02057000 1950-05-31 5850 10.32 USGS 02057000 1950-12-07 5610 10.13 USGS 02057000 1952-09-01 5850 10.36 USGS 02057000 1953-03-24 4730 8.88 USGS 02057000 1954-03-01 2890 6.57 USGS 02057000 1955-08-18 6660 11.30 USGS 02057000 1956-09-27 1520 4.70 USGS 02057000 1957-09-17 4250 8.44 USGS 02057000 1958-05-07 1760 5.02 USGS 02057000 1958-12-29 4810 9.10 USGS 02057000 1959-10-01 6210 10.78 USGS 02057000 1961-04-10 1940 5.30 USGS 02057000 1962-06-14 3530 7.51 USGS 02057000 1962-11-10 6120 10.74 USGS 02057000 1963-11-29 1100 3.84