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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 15087585 TWELVEMILE C NR PETERSBURG AK
Petersburg Borough, Alaska
Hydrologic Unit Code 190102100103
Latitude  56°58'07", Longitude 133°04'05" NAD83
Drainage area 9.6  square miles
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
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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)
352025-01-23 10:21AKSTYesJCT/ECUSGS34.722.750.010.50FairDebrisLightunkn1MainWADEQSCMMVPAA34.760.050.30.69FIRMGRVLEVENSTDYEVENSTNDUPST50.00
342025-01-23 09:15:30AKSTYesJCT/ECUSGS35.122.760.011.00FairDebrisLightunkn1MainWADEQSCMMVPAA35.152.043.10.81FIRMGRVLEVENSTDYEVENSTNDDNST50.00
332024-11-14 08:32AKSTYesJCT/CMJUSGS22.122.510.010.75FairDebrisLightunkn1MainWADEQSCMMVPAA22.158.036.50.60FIRMCBLSEVENSTDYEVENSTNDUPST50.00
322024-08-14 14:31AKDTYesJCT, MHHusgs10.622.310.000.53PoorClearunkn1Twelvemile Creek Routine LocationWADEQSCMMVPAA10.656.530.30.35FIRMSANDEVENSTDYEVENUNKNUPST30.00
312024-06-25 13:57AKDTYesMHH, CMJusgs40.022.790.010.37FairClearunkn1Normal LocationWADEQSCMMVPAA40.057.054.10.74FIRMGRVLEVENSTDYEVENUNKNUPST25.00
302024-06-25 13:31AKDTYesMHH, CMJusgs41.522.800.010.67FairClearunkn1Normal LocationWADEQSCMMVPAA41.557.054.60.76FIRMGRVLEVENSTDYEVENUNKNUPST20.00
292024-05-14 14:43:30AKDTYesMHH, JCTusgs15823.760.010.75FairClearunkn1MainWADEQSCMMVPAA15860.01131.40FIRMGRVLEVENSTDYEVENUNFMUPST80.00
282024-03-21 14:36AKDTNo
272024-01-03 08:58AKSTYesMHH, JCTusgs39.822.760.010.50FairClearunkn1Routine MainWADEQSCMMVPAA39.853.538.11.04SOFTGRVLEVENSTDYEVENUNKNUPST50.00
262023-11-06 13:21AKSTYesMHHusgs13923.540.180.50PoorClearunkn1Above GageWADEQSCMMVPAA13955.078.51.77FIRMGRVLEVENSTDYEVENUNKNUPST50.00
252023-09-06 12:02AKDTYesMHHusgs16.622.440.000.47PoorClearunkn1At GageWADEQSCMMVPAA16.660.434.30.48SOFTSANDEVENSTDYEVENUNKNATGA0.00
242023-07-12 09:47AKDTNo
232023-05-31 10:45AKDTNo
222023-01-10 11:26AKSTYesMHH, JLPusgs32.123.040.020.63PoorIceAnchorunkn1Gage ReachWADEQSCMMVPAA32.159.071.30.45SOFTSANDEVENSTDYEVENUNKNUPST20.00
212022-10-17 15:28:30AKDTYesMHH/PENusgs38424.860.421.50PoorClearunkn1MMT 21WADEQSCMMVPAA38458.01792.15FIRMSANDEVENUNSPUNEVSTNDUPST5.00
202022-08-22 14:20:30AKDTYesCMJ MHH PENusgs24.022.620.001.25Fair unkn120WADEQSCMMVPAA24.061.541.20.58SOFTsiltEVENSTDYEVENSTNDUPST60.00
192022-06-29 09:52:30AKDTYesPENUSGS10223.44-0.010.75Poor unkn112 Mile Solo Aquacalc mmt 19WADEQSCMMVPAA10268.090.51.13FIRMGRVLEVENSTDYEVENSTNDDNST1400.00
182022-06-08 08:15AKDTYesCMJ JMGusgs10523.420.000.50Fair unkn118WADEQSCMMVPAA10562.095.91.10SOFTGRVLEVENSTDYEVENSTNDATGA0.00
172022-03-03 11:40AKSTYesCMJ, JMGusgs25.822.650.000.75FairClearunkn117WADEQSCMMVPAA25.858.049.80.52SOFTGRVLUNEVSTDYEVENUNFMUPST20.00
162021-10-15 14:58:30AKDTYesCMJ, PENUSGS77.623.080.020.75Good unkn1Oct 15 Aquacalc Measurement 16WADEQSCMMVPAA77.648.048.61.59FIRMGRVLEVENSTDYEVENUNFMDNST20.00
152021-09-15 11:17AKDTYesJLP, PENUSGS56.022.910.000.67Good unkn112 Mile CreekWADEQSCMMVPAA56.059.068.90.81FIRMGRVLUNEVPULSEVENSTNDDNST75.00
142021-05-27 12:37AKDTYesrhh/jmgUSGS44.322.760.000.50GoodClearunkn112 mileWADEQSCMMVPAA44.356.058.80.75FIRMGRVLEVENSTDYEVENSTNDUPST50.00
132021-05-19 12:26AKDTYesrhh/jmgUSGS46.622.770.000.50FairClearunkn112 mileWADEQSCMMVPAA46.648.036.11.29FIRMGRVLEVENSTDYEVENSTNDDNST50.00
122021-04-29 17:26:30AKDTYesrhh/jmgUSGS67.723.02 FairClearunkn112 Mile Cr. nr. PetersburgWADEQSCMMVPAA67.755.051.81.31SOFTGRVLEVENSTDYEVENSTNDUPST80.00
111982-10-14 19:37AKDTYesswannerUSGS60.26.92 Unknown unkn1MainunknQSCMMunkno60.257.035.61.69unknunknunknunknunknUNKNunkn
101981-12-06 17:47AKSTYesswanner, imbUSGS71.07.10 Unknown unkn1MainunknQSCMMunkno71.057.554.41.30unknunknunknunknunknUNKNunkn
91980-10-21 19:09:30AKDTYesswannerUSGS60.16.86 Unknown unkn1MainunknQSCMMunkno60.158.044.31.36unknunknunknunknunknUNKNunkn
81979-09-17 21:22AKDTYesswanner, schUSGS1067.24 Unknown unkn1MainunknQSCMMunkno10656.568.21.55unknunknunknunknunknUNKNunkn
71978-11-04 19:32AKSTYesswanner, graUSGS70.06.94 Unknown unkn1MainunknQSCMMunkno70.056.041.61.68unknunknunknunknunknUNKNunkn
61977-10-06 21:24:30AKDTYesswanner, kisUSGS15.46.42 Unknown unkn1MainunknQSCMMunkno15.458.035.40.44unknunknunknunknunknUNKNunkn
51975-10-21 20:14:30AKDTYesswanner, thoUSGS67.36.91 Unknown unkn1MainunknQSCMMunkno67.357.052.61.28unknunknunknunknunknUNKNunkn
41975-06-22 21:59:30AKDTYesthomas kuhuUSGS57.77.11 Unknown unkn1MainunknQSCMMunkno57.759.651.51.11unknunknunknunknunknUNKNunkn
31974-04-12 22:17AKDTYeslovelace, mcUSGS59.17.29 Unknown unkn1MainunknQSCMMunkno59.160.067.30.88unknunknunknunknunknUNKNunkn
21972-11-09 18:22AKSTYeswiggins, kleUSGS2327.90 Unknown unkn1MainunknQSCMMunkno23259.01092.13unknunknunknunknunknUNKNunkn
11972-06-18 18:32AKDTYeslumanUSGS60.6 Unknown unkn1MainunknQSCMMunkno60.653.536.01.68unknunknunknunknunknUNKNunkn