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Streamflow Measurements for the Nation


USGS 01087000 BLACKWATER RIVER NEAR WEBSTER, NH


Merrimack County, New Hampshire
Hydrologic Unit Code 01070003
Latitude  43°17'49", Longitude  71°41'42" NAD27
Drainage area 129  square miles
Gage datum 431.17 feet above NAVD88
Output formats
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Meas.
Number
  Date       Time Time
Datum
Measurement
Used?
  Who Measuring
Agency
Stream
flow
(ft3/s)
Gage
Height
(ft)
GH
Change
(ft)
Meas.
Duration
(hr)
Meas.
Rated
  Control Flow
Adjust.
Code
 
5922024-11-20 08:56:59ESTYesSGSUSGS40.52.27 FairClearNONE
5912024-10-03 11:09:03EDTYesSGSUSGS27.42.10 GoodClearNONE
5902024-09-23 12:59:03EDTYesSGSUSGS11.71.72 FairClearNONE
5892024-08-02 12:00:02EDTYesSGS/CMRUSGS39.02.21 FairClearNONE
5882024-06-04 15:35:05EDTYesSGSUSGS73.42.60 FairClearNONE
5872024-04-16 13:09:05EDTYesSGS/AOKUSGS11505.69 FairClearNONE
5862023-12-22 09:56:04ESTYesSGS/ALUSGS18306.58 GoodClearNONE
5852023-11-02 15:18:09EDTYesSGSUSGS2703.62 PoorClearNONE
5842023-10-05 10:14:04EDTYesJPR/KKCUSGS92.42.630.010.60PoorDebrisLightNONE
5832023-08-10 09:10:08EDTYesJPRUSGS1923.230.000.60FairClearNONE
5822023-04-04 08:54:01EDTYesSGS/MSHUSGS7324.83 FairClearNONE
5812023-02-15 13:22:21ESTYesJPR/SJSUSGS2133.330.000.60FairClearNONE
5802022-10-28 11:14:03EDTYesGABUSGS5694.35 PoorClearNONE
5792022-08-11 13:14EDTYesJLC/AHNLUSGS46.22.32 FairClearNONE
5782022-08-10 11:20EDTYesJLC/SFCUSGS51.22.370.000.20FairClearNONE
5772022-06-03 08:50:01EDTYesJLCUSGS1262.880.021.00PoorClearNONE
5762022-03-22 11:30EDTYesSGSUSGS11005.460.051.25PoorClearNONE
5752021-12-15 11:51ESTYesJLC/GABUSGS2843.760.030.25GoodClearNONE
5742021-12-15 11:01ESTYesJLC/GABUSGS2973.760.030.25GoodClearNONE
5732021-10-01 12:56:05EDTYesCK/JLCUSGS70.82.580.000.65FairClearNONE
5722021-10-01 11:40EDTYesCK/JLCUSGS76.92.580.000.45FairClearNONE
5712021-08-18 15:26EDTYesckUSGS80.12.590.000.72FairClearNONE
5702021-08-10 11:00EDTYesMBCUSGS2203.25-0.010.25PoorClearNONE
5692021-08-10 10:29EDTYesMBCUSGS2083.26-0.010.25PoorClearNONE
5682021-06-10 14:12:09EDTYesMJPUSGS57.42.450.001.05PoorClearNONE
5672021-04-07 10:40:06EDTYesMJP/CKUSGS3363.740.000.50PoorClearNONE
5662020-10-21 14:50EDTYesMJPUSGS80.82.710.011.15FairDebrisModerateNONE
5652020-09-11 15:41EDTYesMJPUSGS8.951.700.000.85FairDebrisModerateNONE
5642020-08-21 08:52:05EDTYesMJPUSGS9.461.670.000.75GoodDebrisModerateNONE
5632020-07-14 13:34:09EDTYesMJP/CKUSGS33.72.230.000.30FairDebrisLightNONE
5622020-05-20 08:13:01EDTYesSGSUSGS2203.45 FairClearNONE
5612020-05-20 07:49:08EDTYesSGSUSGS2163.45 GoodClearNONE
5602019-12-10 11:57ESTYesGS/JHUSGS2063.43 FairClearNONE
5592019-10-16 07:44:02EDTYesGB/GSUSGS33.42.23 FairDebrisModerateNONE
5582019-09-16 15:10EDTYesGABUSGS18.41.95 PoorDebrisModerateNONE
5572019-04-17 10:16:06EDTYesGAB/GESUSGS12305.880.000.50GoodDebrisModerateNONE
5562018-11-29 13:52:13ESTYesGABUSGS4504.41 GoodDebrisModerateNONE
5552018-11-29 13:15:02ESTYesGABUSGS4544.42 GoodDebrisModerateNONE
5542018-10-09 11:15:07EDTYesGAB/MBCUSGS1403.11 FairUnspecifedNONE
5532018-08-02 09:27:05EDTYesGAB/PJSUSGS68.72.59 PoorDebrisModerateNONE
5522018-07-18 11:37:07EDTYesMBCUSGS24.82.09 PoorDebrisHeavyNONE
5512018-07-18 10:13:02EDTYesMBCUSGS25.42.09 PoorDebrisHeavyNONE
5502018-06-08 09:15:06EDTYesGB/MC/SCUSGS1072.88 FairDebrisModerateNONE
5492018-06-08 08:35:09EDTYesGB/MC/SCUSGS1062.88 FairDebrisModerateNONE
5482017-12-20 14:23ESTYesGABUSGS1232.93 FairIceShoreNONE
5472017-09-14 12:28:06EDTYesGABUSGS40.12.27 PoorDebrisLightNONE
5462017-06-05 14:23:09EDTYesGABUSGS3694.010.000.52GoodDebrisModerateNONE
5452017-06-05 13:08:07EDTYesGABUSGS3944.02-0.010.30GoodDebrisModerateNONE
5442017-02-28 13:20:59ESTYesGAB/AJMUSGS10805.43 FairClearNONE
5432016-10-18 12:41EDTYesckUSGS4.461.500.000.60PoorDebrisModerateNONE
5422016-09-01 17:30EDTYesckUSGS11.11.730.000.60FairClearNONE
5412016-06-30 09:03EDTYesCKUSGS29.02.090.000.50FairClearNONE
5402016-05-20 10:00:08EDTYesCKUSGS1142.890.000.90FairClearNONE
5392016-03-18 13:16:04EDTYesCKUSGS6564.500.021.20FairClearNONE
5382015-11-19 14:20:03ESTYesCKUSGS1052.850.001.00FairDebrisLightNONE
5372015-09-25 16:47:02EDTYesCKUSGS22.02.01-0.011.00FairDebrisModerateNONE
5362015-09-25 13:07:05EDTYesCKUSGS21.22.050.000.60FairDebrisModerateNONE
5352015-07-21 12:06:07EDTYesCK/jcrUSGS68.12.550.000.30FairDebrisLightBYPS
5342015-06-18 11:50:09EDTYesjprUSGS1122.900.001.00FairClearNONE
5332015-04-15 13:05:01EDTYesCKUSGS11405.710.001.20FairDebrisLightNONE
5322014-11-18 14:31:27ESTYesCKUSGS2063.300.010.50PoorClearNONE
5312014-07-23 15:59:07EDTYesCK/jrdUSGS59.32.460.000.70FairClearNONE
5302014-05-16 14:26:06EDTYesCKUSGS1383.030.011.00FairClearNONE
5292014-04-02 16:26:05EDTYesCKUSGS13305.94-0.031.10FairClearNONE
5282013-10-22 10:57:08EDTYesRFHUSGS41.22.250.000.80FairClearNONE
5272013-08-06 09:35EDTYesRFH/KRUSGS1122.79-0.121.30FairClearNONE
5262013-07-01 11:42:06EDTYesRFHUSGS11405.460.052.00FairClearNONE
5252013-05-29 12:13:08EDTYesRFHUSGS5054.12-0.052.20FairClearNONE
5242013-03-25 13:38EDTYesRFHUSGS1593.140.002.50FairClearNONE
5232013-03-25 11:08:01EDTYesRFHUSGS1883.140.000.30FairClearNONE
5222012-12-07 12:26ESTYesRFHUSGS90.32.700.012.30FairClearNONE
5212012-12-06 16:05:49ESTNo
5202012-10-09 12:46EDTYesRFHUSGS42.02.300.012.30FairDebrisLightNONE
5192012-08-27 11:21EDTYesRFH/KRUSGS17.21.89 FairClearNONE
5182012-07-23 11:07EDTYesRFHUSGS19.91.95 FairClearNONE
5172012-05-09 13:09:06EDTYesRFHUSGS5244.240.043.30FairClearNONE
5162012-03-16 17:33:07EDTYesRFH/CKUSGS7084.71 FairClearNONE
5152012-03-16 15:43:08EDTNo
5142011-11-21 08:03:30ESTYesrfh/rgkUSGS2373.410.00 FairClearNONE
5132011-09-30 10:02EDTYesAJD,RFHUSGS3043.680.010.50FairClearNONE
5122011-07-07 11:28EDTYesRGK/CMHUSGS81.02.590.000.40FairClearNONE
5112011-05-16 08:23:03EDTYesrgkUSGS3873.740.030.80FairClearNONE
5102011-03-16 13:45EDTYesRGK/AJDUSGS9185.04-0.011.00FairClearNONE
5092010-11-30 13:12ESTYesrgkUSGS1553.090.000.30FairClearNONE
5082010-10-13 10:54EDTYesGABUSGS45.02.330.000.90FairClearNONE
5072010-08-17 14:47EDTYesGABUSGS10.01.700.001.00PoorDebrisLightNONE
5062010-06-24 12:19EDTYesGABUSGS45.52.270.000.70FairClearNONE
5052010-06-24 10:16EDTYesGABUSGS41.22.270.000.40GoodClearNONE
5042010-04-07 16:08EDTYesGABUSGS4224.150.010.30GoodClearNONE
5032009-11-20 15:44ESTYesGABUSGS3993.920.080.60FairClearNONE
5022009-09-16 12:39EDTYesGABUSGS77.52.530.000.70FairClearNONE
5012009-06-04 14:47EDTYesGABUSGS1062.780.001.00FairClearNONE
5002008-11-13 13:46:48ESTYesGABUSGS1933.260.000.60FairClearNONE
4992008-04-30 12:50EDTYesSLW/GABUSGS12105.790.010.30GoodClearNONE
4982007-10-29 09:56EDTYesHLSUSGS2663.580.000.30FairClearNONE
4972007-09-19 10:37EDTYesHLSUSGS63.32.450.011.00FairClearNONE
4962007-04-26 13:31EDTYesHLS/GABUSGS18906.800.000.80FairClearNONE
4952006-12-06 14:35ESTYesHLSUSGS4053.900.000.50PoorClearNONE
4942006-10-10 09:58EDTYesHLSUSGS69.52.570.000.60FairClearNONE
4932006-08-21 15:16EDTYesHLS/SCFUSGS1252.880.010.40FairClearNONE
4922006-05-18 10:25EDTYesSLW/HLSUSGS19506.930.000.30GoodClearNONE
4912006-04-25 09:24EDTYesSLW/HLSUSGS3763.980.000.50FairClearNONE
4902005-10-21 10:49EDTYesSLW/HLSUSGS18906.76-0.010.30FairClearNONE
4892005-10-21 09:54EDTYesSLW/HLSUSGS18506.770.000.70FairClearNONE
4882005-09-15 10:30EDTYesHLS/SLWUSGS20.71.970.000.50FairClearNONE
4872005-07-05 08:55EDTYesC_K/HLSUSGS1373.05-0.011.30FairClearNONE
4862005-05-06 13:00EDTYesHLS/RGKUSGS3833.890.001.30FairClearNONE
4852004-11-01 11:44ESTYesHLSUSGS59.22.410.000.80FairClearNONE
4842004-08-17 12:27EDTYesslw/hlsUSGS65.92.500.000.60FairClearNONE
4832003-10-10 12:15EDTYesSLWUSGS71.82.550.000.70FairClearNONE
4822003-06-26 09:20EDTYesC_K/KABUSGS78.12.590.000.60FairClearNONE
4812003-04-03 14:45ESTYesC_K/GABUSGS15706.23-0.010.50GoodClearNONE
4802002-10-24 13:34EDTYesC_KUSGS25.32.060.000.70FairDebrisLightNONE
4792002-07-24 07:41EDTYesGJSUSGS21.91.990.000.60FairClearNONE
4782002-04-01 13:55ESTYesC_KUSGS6774.660.001.40PoorDebrisLightNONE
4772001-10-23 13:55EDTYesC_KUSGS13.61.860.000.80FairDebrisLightNONE
4762001-08-17 09:23EDTYesGJSUSGS13.91.780.000.60Good NONE
4752001-04-13 13:55EDTYesC_KUSGS8685.190.051.20FairClearNONE
4742000-11-14 15:00ESTYesC_KUSGS1583.150.001.10FairClearNONE
4732000-09-20 13:40EDTYesRGKUSGS48.12.310.000.50GoodClearNONE
4722000-04-06 11:10EDTYesRGKUSGS14405.94-0.010.90FairClearNONE
4711999-12-20 14:30ESTYesRGKUSGS1743.230.031.10GoodClearNONE
4701999-09-27 06:55EDTYesRGKUSGS1943.31-0.010.80GoodClearNONE
4691999-09-02 06:00EDTYesRGKUSGS15.01.830.000.60GoodClearNONE
4681999-07-09 10:25EDTYesRGK/GSUSGS24.22.040.000.30FairClearNONE
4671999-06-10 09:55EDTYesGSUSGS52.52.360.001.20FairClearNONE
4661999-05-13 13:10EDTYesRGKUSGS1162.930.000.50GoodClearNONE
4651999-04-07 06:10EDTYesRGKUSGS8794.95-0.011.10GoodClearNONE
4641999-03-26 07:40ESTYesRGKUSGS12605.70-0.011.00GoodClearNONE
4631999-03-25 09:05ESTYesRGKUSGS14805.990.001.10FairIceShoreNONE
4621998-11-27 12:40ESTYesRGKUSGS3373.600.031.10FairClearNONE
4611998-10-07 11:40EDTYesRGKUSGS28.12.120.000.60GoodClearNONE
4601998-05-29 09:00EDTYesRGKUSGS96.02.720.000.70GoodDebrisLightNONE
4591998-04-09 11:15EDTYesRGKUSGS3733.87-0.100.80FairDebrisModerateNONE
4581997-09-08 13:45EDTYesslwUSGS32.32.160.000.50FairDebrisLightNONE
4571997-05-27 12:40EDTYesSLW/G_SUSGS1893.250.001.50PoorClearNONE
4561996-08-29 10:30EDTYesSLWUSGS21.11.970.000.80FairDebrisLightNONE
4551996-05-20 10:40EDTYesSLWUSGS5884.49-0.011.30PoorClearNONE
4541995-09-05 10:50EDTYesslw/smUSGS9.661.660.000.50GoodDebrisLightNONE
4531995-07-07 11:50EDTYesSLW/PDUSGS21.61.990.000.70GoodClearNONE
4521995-04-06 09:35EDTYesslwUSGS2313.500.000.90GoodClearNONE
4511995-04-05 13:30EDTYesslwUSGS3093.510.001.30PoorClearNONE
4501994-09-15 17:05EDTYesC_KUSGS20.11.92-0.010.80FairClearNONE
4491994-07-06 13:30EDTYesC_KUSGS63.12.44-0.011.00FairClearNONE
4481994-05-20 14:35EDTYesC_KUSGS4573.97-0.011.40PoorClearNONE
4471994-04-07 10:20EDTYesRGKUSGS9205.140.341.30PoorClearNONE
4461993-10-26 11:10EDTYesRGKUSGS55.12.480.000.70FairDebrisLightNONE
4451993-09-10 07:30EDTYesRGKUSGS49.52.270.090.50PoorClearNONE
4441993-08-03 08:00EDTYesRGK/CKUSGS92.12.650.000.50FairClearNONE
4431993-06-28 13:00EDTYesRGK/CKUSGS51.82.380.000.50GoodClearNONE
4421993-05-18 10:50EDTYesRGKUSGS1202.910.001.00GoodClearNONE
4411993-03-11 10:30ESTYesRGKUSGS82.62.630.001.00PoorIceCoverNONE
4401992-12-31 10:00ESTYesRGKUSGS1353.050.031.30PoorIceShoreNONE
4391992-11-17 13:50ESTYesREH/RGKUSGS1523.06-0.011.50FairClearNONE
4381992-09-23 -- ----YesJIMUSGS24.92.010.001.00GoodClearNONE
4371992-08-17 -- ----YesJIMUSGS41.72.230.000.60FairClearNONE
4361992-07-10 -- ----YesJIMUSGS1082.770.001.00GoodClearNONE
4351992-05-22 11:30EDTYesJKUSGS1533.10-0.010.60GoodClearNONE
4341992-04-06 -- ----YesJIMUSGS2343.420.001.80FairClearNONE
4331991-10-16 -- ----YesJIMUSGS1923.310.011.10FairClearNONE
4321991-07-17 -- ----YesKEM/EMBUSGS28.22.090.000.50GoodClearNONE
4311991-06-13 -- ----YesJIMUSGS62.82.440.000.60Fair NONE
4301991-04-26 -- ----YesJIMUSGS5854.590.000.90FairClearNONE
4291991-01-24 -- ----YesJIMUSGS1553.090.001.00FairIceShoreNONE
4281990-12-10 -- ----YesJIMUSGS2713.640.000.70FairClearNONE
4271990-10-24 -- ----YesJIMUSGS3734.00-0.071.10FairClearNONE
4261990-09-07 07:40EDTYesJ.KUSGS86.92.670.000.60GoodClearNONE
4251990-08-16 12:10EDTYesJ.KUSGS17106.40-0.011.50FairClearNONE
4241990-07-12 10:30EDTYesJ.KUSGS46.82.320.000.60FairClearNONE
4231990-05-25 09:37EDTYesJ.K/RLPUSGS4414.25-0.011.50FairClearNONE
4221990-03-28 08:49ESTYesRLPUSGS4744.240.001.40FairClearNONE
4211990-01-05 13:50ESTYesRLP/SCSUSGS99.92.740.00 FairIceCoverNONE
4201989-11-20 14:28ESTYesRLPUSGS3543.88-0.011.30FairClearNONE
4191989-10-17 09:37EDTYesRLPUSGS95.02.650.001.10PoorClearNONE
4181989-09-05 -- ----YesRLP/KEMUSGS39.02.200.000.80GoodClearNONE
4171989-07-17 -- ----YesRLPUSGS98.22.750.000.80GoodClearNONE
4161989-04-19 -- ----YesKEMUSGS5004.350.001.00FairClearNONE
4151988-11-02 -- ----YesKEMUSGS1673.110.040.80FairClearNONE
4141988-09-19 -- ----YesKEMUSGS38.92.200.00 GoodClearNONE
4131988-08-09 -- ----YesKEM/RPUSGS41.42.270.00 FairClearNONE
4121988-06-30 -- ----YesKEMUSGS48.12.290.000.50FairClearNONE
4111988-04-12 -- ----YesJKUSGS3413.900.001.40FairClearNONE
4101987-12-17 -- ----YesKEMUSGS1753.170.00 FairClearNONE
4091987-11-06 -- ----YesKEMUSGS1703.100.00 PoorClearNONE
4081987-10-05 -- ----YesJKUSGS2923.740.041.00PoorClearNONE
4041987-04-13 -- ----YesJKUSGS17106.41 Unspecified NONE
3981986-04-04 -- ----YesSCSUSGS12306.00 Unspecified NONE
3871984-04-12 -- ----YesSCSUSGS18406.71 Unspecified NONE
3631980-04-14 -- ----YesKEMUSGS12305.90 Unspecified NONE
3291974-04-16 -- ----YesKEMUSGS12705.89 Unspecified NONE
3061971-05-06 -- ----YesKEMUSGS14706.16 Unspecified NONE
3051971-04-16 -- ----YesKEMUSGS10405.47 Unspecified NONE
2861969-04-27 23:00ESTYesFEBUSGS20706.89 Unspecified NONE
2221961-04-26 -- ----YesCEHUSGS10905.56 Unspecified NONE
2151960-04-14 -- ----YesCEHUSGS20306.81 Unspecified NONE
2051959-04-09 -- ----YesCEHUSGS19406.77 Unspecified NONE
2041959-04-09 -- ----YesCEHUSGS18906.78 Unspecified NONE
1781955-04-13 -- ----YesCEHUSGS10305.48 Unspecified NONE
1621953-04-01 -- ----YesRMCUSGS17006.42 Unspecified NONE
1561952-06-04 -- ----YesRMCUSGS13806.02 Unspecified NONE
1461951-04-05 -- ----YesBSJUSGS12805.81 Unspecified NONE
841943-11-21 23:00ESTYesDVJUSGS11905.66 Unspecified NONE
791943-04-26 23:00ESTYesDWVUSGS9095.20 Unspecified NONE
731942-06-16 23:00ESTYesJHHUSGS13905.98 Unspecified NONE
711942-04-09 23:00ESTYesCHMUSGS12005.68 Unspecified NONE
421938-09-25 -- ----YesJWGUSGS12205.66 Unspecified NONE
411938-09-22 -- ----YesJWGUSGS668010.44 Unspecified NONE