# # U.S. Geological Survey, National Water Information System # Surface water measurements # # Retrieved: 2026-01-03 05:27:07 EST (vaww02) # # Further descriptions of the columns and codes used can be found at: # https://help.waterdata.usgs.gov/output-formats#streamflow_measurement_data # # Data for the following 1 site(s) are contained in this file # USGS 16816000 Umatac River at Umatac, Guam # ----------------------------------------------------------------------------------- # # agency_cd site_no measurement_nu measurement_dt tz_cd q_meas_used_fg party_nm site_visit_coll_agency_cd gage_height_va discharge_va measured_rating_diff gage_va_change gage_va_time control_type_cd discharge_cd chan_nu chan_name meas_type streamflow_method velocity_method chan_discharge chan_width chan_area chan_velocity chan_stability chan_material chan_evenness long_vel_desc horz_vel_desc vert_vel_desc chan_loc_cd chan_loc_dist 5s 15s 6s 19d 12s 1s 12s 5s 12s 12s 12s 7s 6s 21s 15s 11n 64s 4s 5s 5s 14s 14s 14s 14s 4s 4s 4s 12s 9s 12s 7s 14s USGS 16816000 246 1975-09-02 15:05:00 GST Yes jq USGS 0.33 3.53 Good 0.00 0.30 NONE 1 Imported Channel 1 WADE unspe unkno 3.53 8.50 4.38 0.81 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 247 1975-10-01 15:16:00 GST Yes db USGS 0.37 4.42 Good 0.00 0.30 NONE 1 Imported Channel 1 WADE unspe unkno 4.42 8.50 4.75 0.93 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 295 2001-07-27 15:30:00 GST Yes lvm USGS 1.16 3.50 Fair -0.01 1.00 Clear NONE 1 Imported Channel 1 WADE unspe unkno 3.50 17.3 8.83 0.40 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 296 2001-09-13 11:20:00 GST Yes lvm USGS 1.23 5.23 Poor -0.01 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 5.23 16.1 10.0 0.52 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 297 2001-11-27 13:45:00 GST Yes lvm/ns USGS 1.30 7.26 Poor -0.01 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 7.26 13.4 9.93 0.73 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 298 2002-01-30 10:30:00 GST Yes cwy/ns USGS 1.16 3.98 Poor 0.00 0.30 Clear NONE 1 Imported Channel 1 WADE unspe unkno 3.98 8.50 7.76 0.51 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 299 2002-03-18 12:30:00 GST Yes lvm USGS 1.09 1.90 Poor 0.00 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 1.90 7.50 4.38 0.43 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 300 2002-05-22 13:22:00 GST Yes lvm/ns USGS 1.10 2.58 Fair 0.00 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 2.58 11.0 4.81 0.54 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 302 2002-10-17 11:05:00 GST Yes lvm/jn USGS 1.18 4.75 Poor 0.00 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 4.75 12.0 5.12 0.92 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 304 2002-12-09 12:00:00 GST Yes lvm USGS 1.68 36.2 Fair -0.01 0.20 Clear NONE 1 Imported Channel 1 WADE unspe unkno 36.2 36.0 23.5 1.54 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 305 2003-02-03 13:40:00 GST Yes lvm/gr USGS 1.05 1.90 Fair 0.00 0.30 Clear NONE 1 Imported Channel 1 WADE unspe unkno 1.90 14.0 2.88 0.66 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 306 2003-03-31 13:58:00 GST Yes lvm/jn USGS 0.98 0.98 Fair 0.00 0.50 Clear NONE 1 Imported Channel 1 WADE unspe unkno 0.98 9.50 2.28 0.43 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 307 2003-06-03 11:00:00 GST Yes lvm/gr USGS 0.97 0.91 Fair 0.00 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 0.91 4.70 1.22 0.75 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 308 2003-08-19 13:15:00 GST Yes gar/lvm USGS 1.33 9.37 Fair 0.00 0.50 Clear NONE 1 Imported Channel 1 WADE unspe unkno 9.37 11.9 6.73 1.39 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 309 2003-11-04 15:50:00 GST Yes lvm USGS 1.23 5.68 Poor -0.01 0.80 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 5.68 14.4 5.72 0.99 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 310 2003-12-22 14:50:00 GST Yes jwn/kt USGS 1.46 13.3 Fair -0.02 1.20 Clear NONE 1 Imported Channel 1 WADE unspe unkno 13.3 22.0 11.2 1.19 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 311 2004-03-15 10:35:00 GST Yes lvm/gar USGS 1.13 2.68 Poor 0.00 0.40 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 2.68 11.0 4.44 0.60 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 312 2004-03-15 13:45:00 GST Yes lvm/gar USGS 1.08 2.68 Poor 0.00 0.40 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 2.68 11.0 4.44 0.60 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 313 2004-05-20 11:11:00 GST Yes jwn/kt USGS 0.99 1.56 Fair 0.00 0.80 Clear NONE 1 Imported Channel 1 WADE unspe unkno 1.56 7.20 3.21 0.49 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 314 2004-06-27 23:59:00 GST Yes RAF USGS 5.32 2070 Poor NONE 1 Imported Channel 1 OTHR QIDIR 2070 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 315 2004-07-13 15:05:00 GST Yes JWN/RLC USGS 1.13 4.44 Fair 0.02 0.80 Clear NONE 1 Imported Channel 1 WADE unspe unkno 4.44 11.4 4.85 0.92 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 316 2004-09-10 13:45:00 GST Yes BH /JWN USGS 1.23 6.05 Poor -0.01 0.30 NONE 1 Imported Channel 1 WADE unspe unkno 6.05 15.2 6.95 0.87 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 317 2004-10-26 15:30:00 GST Yes JWN/MTB USGS 1.15 3.86 Good -0.01 0.70 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 3.86 10.4 5.68 0.68 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 318 2004-12-02 15:00:00 GST Yes JWN/BRH USGS 1.14 3.77 Fair 0.00 0.60 NONE 1 Imported Channel 1 WADE unspe unkno 3.77 11.9 5.30 0.71 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 319 2005-02-22 14:45:00 GST Yes BRH/DCN USGS 0.99 1.36 Fair -0.01 0.70 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 1.36 6.60 3.12 0.44 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 320 2005-05-16 12:53:00 GST Yes DCN/RJC USGS 0.92 0.82 Poor 0.00 0.60 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 0.82 2.70 1.51 0.54 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 321 2005-09-01 13:14:00 GST Yes DCN/STY USGS 2.07 61.7 Good Clear NONE 1 Imported Channel 1 WADE unspe unkno 61.7 26.0 30.2 2.04 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 322 2005-11-30 13:20:00 GST Yes DCN USGS 1.07 3.69 Poor -0.01 1.10 Clear NONE 1 Imported Channel 1 WADE unspe unkno 3.69 7.00 4.36 0.85 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 323 2006-02-26 11:17:00 GST Yes DCN USGS 0.93 1.30 Poor -0.01 0.80 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 1.30 4.70 2.75 0.47 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 324 2006-05-25 14:47:00 GST Yes DCN/MTJ USGS 0.83 0.56 Poor 0.00 0.60 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 0.56 3.40 1.24 0.45 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 325 2006-05-25 14:47:00 GST Yes DCN/MTJ USGS 0.80 0.56 Poor 0.00 0.60 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 0.56 3.40 1.24 0.45 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 326 2006-08-30 16:18:00 GST Yes DCN USGS 1.16 6.71 Fair -0.01 0.50 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 6.71 17.5 11.6 0.58 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 327 2006-11-29 14:16:00 GST Yes CWY USGS 1.05 3.00 Fair 0.00 0.70 DebrisLight NONE 1 Imported Channel 1 WADE unspe unkno 3.00 10.7 5.08 0.59 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 328 2006-11-29 14:16:00 GST Yes CWY USGS 1.01 3.00 Fair 0.00 0.70 DebrisLight NONE 1 Imported Channel 1 UNSP other 3.00 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 329 2007-03-20 11:50:00 GST Yes CWY/KTT USGS 0.88 1.04 Good 0.00 0.60 VegetationLight NONE 1 Imported Channel 1 WADE unspe unkno 1.04 5.60 1.99 0.52 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 330 2007-06-06 10:07:00 GST Yes CWY/KTT USGS 0.84 0.65 Fair 0.00 0.40 Clear NONE 1 Imported Channel 1 WADE unspe unkno 0.65 3.20 1.20 0.54 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 331 2007-09-25 14:15:00 GST Yes CWY/KTT USGS 1.32 9.62 Fair 0.00 0.60 Clear NONE 1 Imported Channel 1 WADE unspe unkno 9.62 8.20 5.60 1.71 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 332 2007-12-14 11:00:00 GST Yes CWY/KTT USGS 1.49 3.87 Fair 0.00 0.60 Unspecifed NONE 1 Imported Channel 1 WADE unspe unkno 3.87 9.40 6.04 0.64 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 333 2008-02-28 14:09:00 GST Yes CWY/RLR USGS 1.63 4.89 Unspecified Unspecifed NONE 1 Imported Channel 1 WADE unspe unkno 4.89 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 334 2008-06-10 14:15:00 GST Yes CWY/KTT USGS 1.39 0.79 Good 0.00 Unspecifed NONE 1 Imported Channel 1 WADE unspe unkno 0.79 4.60 1.52 0.51 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 335 2008-09-18 10:37:24 GST Yes CWY/MTJ USGS 1.53 4.90 Fair 0.00 0.60 Clear NONE 1 Imported Channel 1 WADE QSCMM VPYG 4.90 9.40 9.28 0.53 FIRM GRVL EVEN unkn EVEN UNSP UPST 100.00 USGS 16816000 336 2009-02-27 15:29:00 GST Yes CWY/KTT USGS 1.13 0.97 Good 0.00 0.80 Unspecifed NONE 1 Imported Channel 1 WADE QSCMM VPYG 0.97 5.70 3.30 0.29 UNSP UNSP UNSP unkn UNSP UNSP UPST 60.00 USGS 16816000 337 2009-06-18 11:40:30 GST Yes CWY/KTT USGS 1.32 0.76 Poor 0.00 0.80 FillControlChanged NONE 1 Imported Channel 1 WADE QSCMM VPYG 0.76 4.20 3.28 0.23 FIRM GRVL UNEV unkn UNEV UNSP UPST 60.00 USGS 16816000 339 2009-10-15 15:39:00 GST Yes cwy/ktt USGS 1.96 14.9 Good Unspecifed NONE 1 Imported Channel 1 WADE QSCMM VPYG 14.9 17.6 10.4 1.44 FIRM GRVL UNEV unkn UNEV UNSP UPST 150.00 USGS 16816000 341 2010-03-03 17:44:00 GST Yes CWY/MTJ USGS -0.58 1.01 Poor 0.00 0.40 ScourControlChanged NONE 1 Imported Channel 1 WADE QSCMM VPYG 1.01 3.80 1.52 0.67 FIRM GRVL UNEV unkn UNEV STND UPST 50.00 USGS 16816000 349 2010-06-11 16:01:30 GST Yes MTJ/CWY USGS 0.01 0.34 Poor 0.40 ScourControlChanged NONE 1 Imported Channel 1 WADE QSCMM VPYG 0.34 3.40 1.04 0.33 FIRM GRVL EVEN unkn EVEN STND UPST 50.00 USGS 16816000 342 2010-10-20 15:05:30 GST Yes CWY/MTJ USGS 1.04 5.04 Fair 0.00 0.70 Unspecifed NONE 1 Imported Channel 1 WADE QSCMM VPYG 5.04 6.90 4.99 1.01 FIRM GRVL UNEV unkn UNEV STND UPST 100.00 USGS 16816000 343 2011-01-14 11:56:00 GST Yes CWY/DCN USGS 0.84 3.91 Good 0.00 Clear NONE 1 umatac WADE QSCMM VPYG 3.91 4.90 3.56 1.10 SOFT GRVL EVEN unkn EVEN STND DNST 100.00 USGS 16816000 344 2011-04-07 14:02:00 GST Yes CWY/VEK USGS 1.12 2.78 Fair NONE 1 umatac WADE QSCMM VPYG 2.78 4.50 2.23 1.25 FIRM GRVL EVEN unkn EVEN STND UPST 180.00 USGS 16816000 345 2011-07-05 14:02:00 GST Yes CWY/DCN USGS 1.12 2.60 Fair Clear NONE 1 umatac WADE QSCMM VPYG 2.60 5.50 3.14 0.83 FIRM GRVL EVEN unkn EVEN STND UPST 100.00 USGS 16816000 346 2011-07-06 13:02:30 GST Yes CWY/DCN USGS 1.47 10.4 Fair -0.04 0.40 Clear NONE 1 umatac WADE QSCMM VPYG 10.4 15.6 8.29 1.25 SOFT GRVL EVEN unkn EVEN STND UPST 200.00 USGS 16816000 347 2011-07-06 13:29:00 GST Yes CWY/DCN USGS 1.43 9.48 Good -0.02 Clear NONE 1 Channel 1 UNSP QSCMM VPYG 9.48 15.5 8.04 1.18 UNSP UNSP UNSP unkn UNSP UNSP UNSP USGS 16816000 348 2011-10-18 11:09:30 GST Yes CWY/BHS USGS 1.35 4.63 Good 0.00 Clear NONE 1 umatac WADE QSCMM VPYG 4.63 10.4 6.07 0.76 FIRM GRVL EVEN unkn EVEN STND UPST 200.00