USGS Scientific Investigations Report 2010–5065Channel Change and Bed-Material Transport in the Lower Chetco River, Oregon

Table 3. Map and survey data reviewed in the sediment transport study, Chetco River, Oregon.

[Abbreviations: FPkm, flood-plain kilometer; LIDAR, light detection and ranging; NAVD88, North American Vertical Datum of 1988; USACE, U.S. Army Corps of Engineers; GLO, General Land Office; SCS, Soil Conservation Service; USGS, U.S. Geological Survey; m³/s, cubic meter per second]

Original source for map or survey	Type of map  or survey	Date of map  or survey	Date(s) of survey	Coverage	Comments
USACE	Navigational bathymetry map	1939	June 20–July 14, 1939	FPkm 0–4.5	Scanned, rectified and digitized by USGS personnel using 1939 aerial photographs.
GLO	Township survey	1879	September 16– October 2, 1845 and February 25– March 12, 1879	FPkm 3–11.5	Survey to delineate township and section lines; channel and gravel bar locations were surveyed at the section boundaries, with intervening areas approximated.
SCS	Flood study	1979	1977	FPkm 0–16	Cross sections converted to NAVD88 vertical datum (this study) for comparison with 2008 data.
Watershed Sciences, Inc.	LIDAR survey	Expected release in 2009	May 3–July 6, 2008	FPkm 0–16	Discharge during LIDAR flight ranged from approximately 37 m³/s.
USGS	Bathyemetric survey	This study	September 16 and 17, 2008	FPkm 0–3.5	Bathymetric survey of Chetco River estuary using Echosounder to produce 3–5 depth measurements per meter of survey line.
USGS	Cross section and long profile survey	This study	October 7–9, 2008	FPkm 3–16	See accompanying GIS layers and metadata for map and survey descriptions.