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Streamflow Measurements for the Nation


USGS 08171350 Blanco Rv at San Marcos, TX


Hays County, Texas
Hydrologic Unit Code 12100203
Latitude  29°52'46.24", Longitude  97°54'38.71" NAD83
Drainage area 436.0  square miles
Gage datum 542.97 feet above NAVD88
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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
 
Channel
Number
Channel
Name
Meas.
type
 
Stream
flow
method
 
Velocity
method
 
Channel
flow
(ft3/s)
Channel
width
(ft)
Channel
area
(ft2)
Channel
vel.
(ft/s)
Channel
stability
 
Channel
material
 
Channel
evenness
 
Long.
vel.
desc.
 
Horz.
vel.
desc.
 
Vert.
vel.
desc.
 
Channel
loc.
code
 
Channel
loc.
dist.(ft)
902025-05-22 13:00CDTYesABMUSGS0.006.670.000.10ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
892025-03-25 15:05CDTYesRNSUSGS0.007.450.000.17ExcellentNoFlowNONE1mainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST150.00
882025-02-03 12:30CSTYesRNSUSGS0.00 0.000.17ExcellentDebrisHeavyNONE1mainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST100.00
872024-12-18 11:08:30CSTYesRNSUSGS0.006.510.000.50ExcellentVegetationModerateNONE1mainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST150.00
862024-11-07 12:15CSTYesRNSUSGS0.006.250.000.17ExcellentNoFlowNONE1mainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST200.00
852024-08-05 14:47:56CDTYesRNS/CAHUSGS0.567.850.000.50FairDebrisModerateNONE1mainWADEQSCMMVADV0.566.001.700.33FIRMGRVLEVENSTDYEVENSTNDDNST300.00
842024-06-11 14:30:47CDTYesAJLUSGS0.467.830.000.20PoorDebrisHeavyNONE1MainWADEQSCMMVADV0.464.501.140.40FIRMGRVLUNEVPULSUNEVNSTDDNST350.00
832024-05-01 10:06:49CDTYesAJLUSGS1.147.970.000.20PoorVegetationModerateNONE1MainWADEQSCMMVADV1.147.001.980.58FIRMGRVLUNEVPULSUNEVNSTDDNST400.00
822024-03-08 12:51:31CSTYesAJLUSGS1.487.990.000.30PoorVegetationModerateNONE1MainWADEQSCMMVADV1.484.602.330.63FIRMGRVLUNEVPULSUNEVNSTDDNST500.00
812024-03-08 12:32:34CSTYesAJLUSGS1.557.990.000.30PoorVegetationModerateNONE1MainWADEQSCMMVADV1.554.602.380.65FIRMGRVLUNEVPULSUNEVNSTDDNST500.00
802024-01-17 13:49:15CSTYesAJLUSGS0.687.690.000.10PoorClearNONE1MainWADEQSCMMVADV0.683.000.940.73FIRMCBLSUNEVPULSEVENNSTDDNST360.00
792024-01-17 13:37:53CSTYesAJLUSGS0.667.690.000.10PoorClearNONE1MainWADEQSCMMVADV0.663.500.850.78FIRMCBLSUNEVPULSEVENNSTDDNST350.00
782023-12-05 12:31:44CSTYesAJLUSGS0.077.570.000.10PoorClearNONE1MainWADEQSCMMVADV0.071.200.170.42FIRMGRVLUNEVPULSEVENNSTDDNST350.00
772023-12-05 12:28:20CSTYesAJLUSGS0.087.570.000.10PoorClearNONE1MainWADEQSCMMVADV0.081.000.110.71FIRMGRVLUNEVPULSEVENNSTDDNST350.00
762023-10-10 09:55CDTYesAJLUSGS0.00 ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
752023-08-30 16:10CDTYesAJLUSGS0.00 ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
742023-07-31 09:30CDTYesAJLUSGS0.00 ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
732023-06-01 10:27:12CDTYesAJLUSGS0.217.820.000.10PoorDebrisModerateNONE1MainWADEQSCMMVADV0.212.600.450.47FIRMCBLSUNEVPULSUNEVNSTDDNST250.00
722023-06-01 10:20:26CDTYesAJLUSGS0.237.820.000.10PoorDebrisModerateNONE1MainWADEQSCMMVADV0.232.600.470.50FIRMCBLSUNEVPULSUNEVNSTDDNST250.00
712023-04-03 14:34:43CDTYesAJLUSGS0.067.620.000.10PoorVegetationModerateNONE1MainWADEQSCMMVADV0.060.800.300.20FIRMCBLSUNEVPULSUNEVNSTDDNST250.00
702023-04-03 14:28:49CDTYesAJLUSGS0.077.620.000.10PoorVegetationModerateNONE1MainWADEQSCMMVADV0.071.300.200.34FIRMBLDRUNEVPULSUNEVNSTDDNST250.00
692023-02-22 09:40:48CSTYesAJL/OSCUSGS1.367.88-0.080.30PoorDebrisModerateNONE1MainWADEQSCMMVADV1.364.001.730.79FIRMGRVLUNEVPULSUNEVSTNDDNST200.00
682023-01-03 14:45CSTYesAJLUSGS0.00 ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST200.00
672022-11-18 11:29CSTYesAJLUSGS0.00 ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
662022-09-07 15:15:30CDTYesPWBUSGS0.006.180.000.15Excellent NONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
652022-08-09 13:15CDTYesABMUSGS0.005.650.000.10ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
642022-06-21 09:00CDTYesABMUSGS0.006.250.000.10ExcellentNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
632022-04-20 09:15CDTYesABMUSGS0.007.650.000.10ExcellentNoFlowNONE1mainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST300.00
622022-03-01 08:01CSTYesMAWUSGS1.768.010.000.60FairVegetationLightNONE1MainWADEQSCMMVADV1.7616.36.410.28SOFTGRVLUNEVPULSUNEVUNKNDNST400.00
612022-01-19 14:10:30CSTYesCAHUSGS0.578.100.000.50FairFillControlChangedNONE1MainWADEQSCMMVADV0.573.301.780.32SOFTGRVLUNEVSTDYUNSPSTNDDNST100.00
602021-11-18 13:25:26CSTYesCAHUSGS25.48.720.000.50Fair NONE1MainWADEQADCPVADCP25.437.850.40.50SOFTGRVLUNEVSTDYUNSPSTNDDNST120.00
592021-10-14 12:33:32CDTYesABM/AJLUSGS638018.28-0.280.20FairSubmergedNONE1mainBRDSQADCPVADCP638013015404.14FIRMsiltUNEVSTDYUNEVSTNDATGA0.00
582021-10-14 11:51:26CDTYesABM/AJLUSGS748019.24-0.570.30FairSubmergedNONE1mainBRDSQADCPVADCP748015616604.51FIRMsiltUNEVSTDYUNEVSTNDATGA0.00
572021-08-09 12:51:30CDTYesCAHUSGS2.847.840.000.50FairFillControlChangedNONE1MainWADEQSCMMVADV2.8414.08.200.35SOFTGRVLUNEVSTDYUNSPSTNDDNST150.00
562021-06-29 12:15:30CDTYesCAHUSGS10.97.980.001.00PoorFillControlChangedNONE1MainWADEQSCMMVADV10.928.012.70.86SOFTGRVLUNEVSTDYUNSPSTNDDNST200.00
552021-05-13 13:42:30CDTYesCAHUSGS1.017.630.000.50PoorDebrisModerateNONE1MainWADEQSCMMVADV1.014.001.200.84SOFTGRVLUNEVSTDYUNSPSTNDDNST130.00
542021-03-23 15:26CDTYesCAHUSGS0.487.560.000.50PoorFillControlChangedNONE1MainWADEQSCMMVADV0.483.500.540.89FIRMGRVLUNEVSTDYUNSPSTNDDNST150.00
532021-02-09 13:35CSTYesCAHUSGS0.157.340.000.50FairDebrisModerateNONE1MainOTHRother 0.15 UNSPGRVLUNEVSTDYUNSPSTNDDNST120.00
522020-12-08 11:05CSTYesCAHUSGS0.006.630.000.50UnspecifiedNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPDNST200.00
512020-10-08 12:35CDTYesCAHUSGS0.007.330.000.20FairNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPUNSP
502020-08-18 15:15CDTYesCAHUSGS0.006.820.000.10UnspecifiedNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPUNSP
492020-06-25 10:27CDTYesCAHUSGS11.88.040.001.00FairFillControlChangedNONE1MainWADEQSCMMVADV11.826.014.50.81SOFTGRVLUNEVSTDYUNSPSTNDDNST100.00
482020-04-28 12:55:30CDTYesCAHUSGS0.657.490.000.50PoorVegetationLightNONE1MainWADEQSCMMVADV0.655.301.140.57FIRMGRVLUNEVSTDYUNSPSTNDDNST150.00
472020-02-26 13:28:30CSTYesHartmannUSGS0.147.430.000.15PoorVegetationModerateNONE1MainOTHRother 0.14 SOFTGRVLUNEVSTDYUNSPSTNDDNST125.00
462019-12-27 14:02:30CSTYesCAHUSGS0.207.500.000.20Poor NONE1MainOTHRother 0.20 SOFTGRVLUNEVSTDYUNSPSTNDDNST300.00
452019-10-23 10:27:30CDTYesCAHUSGS0.006.710.000.10UnspecifiedNoFlowNONE1MainOTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPUNSP
442019-08-21 10:22:30CDTYesCAHUSGS1.877.540.001.00GoodDebrisModerateNONE1MainWADEQSCMMVADV1.8714.74.160.45SOFTGRVLUNEVSTDYUNSPSTNDDNST110.00
432019-06-27 12:18:11CDTYesCAHUSGS1118.920.000.50Fair NONE1MainWADEQADCPVADCP11176.71280.87SOFTGRVLUNSPSTDYUNSPSTNDDNST200.00
422019-05-08 10:53:23CDTYesCAHUSGS43310.110.011.00FairDebrisModerateNONE1MainBRDSQADCPVADCP43354.32132.04SOFTGRVLUNEVSTDYUNSPSTNDDNST450.00
412019-03-29 23:59:30CDTYesCAHUSGS57.18.320.000.50FairVegetationModerateNONE1MainWADEQSCMMVADV57.148.039.11.46SOFTGRVLUNEVSTDYUNSPSTNDDNST300.00
402019-02-04 16:22:15CSTYesCAH/BLPUSGS2209.220.001.00FairVegetationLightNONE1MainBRDSQADCPVADCP22050.51601.38SOFTGRVLUNEVSTDYUNSPSTNDDNST500.00
392018-11-14 13:39:30CSTYesCAHUSGS1338.940.011.00Poor NONE1MainWADEQSCMMVADV13359.064.52.07SOFTCBLSUNEVSTDYUNSPSTNDDNST150.00
382018-09-19 11:47CDTYesCAHUSGS29.58.030.001.00FairDebrisModerateNONE1MainWADEQSCMMVADV29.530.022.21.33SOFTGRVLUNSPSTDYUNEVSTNDDNST150.00
372018-07-12 11:11CDTYesCAHUSGS2.847.410.001.00FairVegetationHeavyNONE1MainWADEQSCMMVADV2.8414.09.180.31SOFTGRVLUNEVSTDYUNSPSTNDDNST350.00
362018-05-21 10:22:30CDTYesCAHUSGS2.287.390.001.00FairVegetationModerateNONE1MainWADEQSCMMVADV2.2815.59.400.24SOFTCBLSUNEVSTDYUNSPSTNDDNST400.00
352018-03-23 08:23:30CDTYesCAHUSGS1.027.300.001.00FairVegetationModerateNONE1MainWADEQSCMMVADV1.0216.07.080.14SOFTCBLSUNEVSTDYUNSPSTNDDNST300.00
342018-01-18 11:33CSTYesCAHUSGS2.627.420.001.00FairVegetationModerateNONE1MainWADEQSCMMVADV2.6217.09.070.29SOFTCBLSUNEVSTDYUNSPSTNDDNST250.00
332017-11-13 14:55:30CSTYesABMUSGS2.387.390.000.20FairVegetationModerateNONE1MainWADEQSCMMVADV2.3815.07.400.32FIRMGRVLUNEVSTDYUNEVSTNDDNST300.00
322017-09-25 15:19:30CDTYesABMUSGS4.407.440.000.50FairVegetationLightNONE1MainWADEQSCMMVADV4.4016.08.000.55FIRMGRVLUNEVSTDYUNEVSTNDDNST400.00
312017-08-03 11:41CDTYesABM/PWBUSGS0.697.220.001.00Fair NONE1MainWADEQSCMMVADV0.699.003.790.18FIRMGRVLUNEVSTDYUNEVSTNDDNST200.00
302017-06-14 13:10:09CDTYesABMUSGS33.47.910.000.20FairDebrisLightNONE1MainBRDSQADCPVADCP33.476.33900.09SOFTsiltUNEVunknUNEVSTNDATGA0.00
292017-04-12 09:37:16CDTYesABMUSGS133011.84-0.130.20FairDebrisModerateNONE1mainBRDSQADCPVADCP133093.17701.73SOFTsiltUNEVunknUNEVSTNDATGA
282017-02-21 14:02:46CSTYesABMUSGS55310.180.000.20FairDebrisLightNONE1mainBRDSQADCPVADCP55387.96040.92SOFTsiltUNEVunknUNEVSTNDATGA
272016-12-22 08:40:39CSTYesABMUSGS88.68.440.000.20FairDebrisLightNONE1MainBRDSQADCPVADCP88.679.54370.20FIRMsiltUNEVunknUNEVSTNDATGA
262016-10-19 10:06:18CDTYesABMUSGS82.08.380.000.20FairClearNONE1mainBRDSQADCPVADCP82.084.94460.18SOFTsiltUNEVunknUNEVSTNDATGA
252016-08-31 08:52:34CDTYesABMUSGS1768.910.000.20FairVegetationLightNONE1mainBRDSQADCPVADCP17686.64880.36FIRMsiltUNEVunknUNEVSTNDATGA
242016-06-22 08:24:06CDTYesABMUSGS3129.490.00 FairUnspecifedNONE1mainBRDSQADCPVADCP31287.15530.56FIRMsiltUNEVunknUNEVSTNDATGA
232016-05-20 10:01:34CDTYesABM/CAPUSGS218013.71-0.080.20FairDebrisModerateNONE1mainBRDSQADCPVADCP21801099992.18FIRMsiltUNEVunknUNEVSTNDATGA
222016-05-20 09:36:01CDTYesABM/CAPUSGS226013.82-0.040.20FairDebrisModerateNONE1mainBRDSQADCPVADCP226011210302.20FIRMsiltUNEVunknUNEVSTNDATGA
212016-05-19 19:38:30CDTYesABM/MASUSGS676017.240.090.20PoorDebrisModerateNONE1mainBRDSQADCPVADCP676013417303.90FIRMsiltUNEVunknUNEVSTNDATGA
202016-05-19 19:02:44CDTYesABM/MASUSGS515017.020.200.50PoorDebrisModerateNONE1mainBRDSQADCPVADCP515011013403.86FIRMsiltUNEVunknUNEVSTNDATGA
192016-04-18 09:49:58CDTYesABMUSGS62310.630.160.20FairClearNONE1mainBRDSQADCPVADCP62393.86730.92SOFTsiltUNEVunknUNEVSTNDATGA
182016-04-18 08:45:11CDTYesABMUSGS3029.750.200.10PoorClearNONE1mainBRDSQADCPVADCP30283.15720.53SOFTsiltUNEVunknUNEVSTNDATGA
172016-02-24 08:22:16CSTYesABMUSGS85.18.730.000.20FairDebrisLightNONE1MainBRDSQADCPVADCP85.181.24760.18FIRMsiltUNEVunknUNEVSTNDATGA
162015-12-15 10:45:23CSTYesABM/GDUUSGS3409.79-0.020.30FairDebrisLightNONE1mainBRDSQADCPVADCP34088.85930.57FIRMsiltUNEVunknUNEVSTNDATGA
152015-10-09 08:13CDTYesABMUSGS1.097.770.000.40FairDebrisLightNONE1mainWADEQSCMMVADV1.097.101.270.86FIRMGRVLUNEVunknUNEVSTNDDNST250.00
142015-08-03 10:09:15CDTYesABMUSGS62.08.710.000.20FairClearNONE1mainBRDSQADCPVADCP62.085.25400.12FIRMsiltUNEVunknUNEVSTNDATGA
132015-06-24 12:14:57CDTYesABM/CAPUSGS54310.570.000.20FairDebrisLightNONE1MainBRDSQADCPVADCP54391.17170.76FIRMGRVLUNEVunknUNEVSTNDATGA
122015-06-24 11:47:12CDTYesABM/CAPUSGS54010.570.000.20FairDebrisLightNONE1MainBRDSQADCPVADCP54091.57210.75FIRMGRVLUNEVunknUNEVSTNDATGA
112015-05-25 11:42:46CDTYesABM/MBNUSGS397016.38-0.020.20FairDebrisLightNONE1mainBRDSQADCPVADCP397013213103.04FIRMGRVLUNEVunknUNEVSTNDDNST20.00
102015-05-21 11:01:09CDTYesABM/RLSUSGS66211.820.000.20FairDebrisModerateNONE1mainBRDSQADCPVADCP66295.38130.81FIRMGRVLUNEVunknUNEVSTNDATGA
92015-05-21 10:37:23CDTYesABM/RLSUSGS69711.820.000.20FairDebrisModerateNONE1mainBRDSQADCPVADCP69799.78240.85FIRMGRVLUNEVunknUNEVSTNDATGA
82015-05-14 10:20:24CDTYesABM/MASUSGS33411.160.010.20FairDebrisLightNONE1MainBRDSQADCPVADCP33492.87460.45FIRMGRVLUNEVunknUNEVSTNDATGA
72015-05-14 09:53:54CDTYesABM/MASUSGS35911.190.020.30FairDebrisLightNONE1MainBRDSQADCPVADCP35993.27560.47FIRMGRVLUNEVunknUNEVSTNDATGA
62015-05-13 15:17:47CDTYesABM/MASUSGS80.69.870.000.20FairDebrisLightNONE1mainBRDSQADCPVADCP80.689.36140.13FIRMGRVLUNEVunknUNEVUNFMATGA
52015-05-13 14:47:45CDTYesABM/MASUSGS78.89.890.020.40FairDebrisLightNONE1mainBRDSQADCPVADCP78.888.76120.13FIRMGRVLUNEVunknUNEVUNFMATGA
42015-04-06 14:45:30CDTYesABMUSGS21.99.010.000.60FairVegetationModerateNONE1mainWADEQSCMMVADV21.933.531.50.70FIRMGRVLUNEVunknUNEVNSTDDNST350.00
32015-02-19 12:41:30CSTYesABMUSGS5.558.270.00 Fair NONE1MAINWADEQSCMMVADV5.5514.07.680.72FIRMCBLSUNEVunknUNEVSTNDDNST400.00
22015-01-22 10:16:25CSTNo
12015-01-22 09:49:02CSTNo