USGS Water-Year Summary 2024
15087585 TWELVEMILE C NR PETERSBURG AK
LOCATION - Lat 56°58'07", long 133°04'05" referenced to North American Datum of 1983, UNSPECIFIEDAK, Hydrologic Unit 19010210, , in NW 1/4 SE1/4 sec.31T.56 S., R.77 E., on Kupreanof Island, Lindenberg Peninsula, in Tongass National Forest, 0.8 miles upstream from the mouth at Frederick Sound, and 10 Miles northwest of Petersburg.
DRAINAGE AREA - 9.60 mi².
SURFACE-WATER RECORDS
GAGE - Water-stage recorder. Datum of gage is -6.99 ft NAVD88.