Conversion Factors, Datum, and Abbreviations and Acronyms

Conversion Factors

Inch/Pound to SI

Multiply	By	To obtain
inch (in.)	2.54	centimeter (cm)
foot (ft)	0.3048	meter (m)
mile (mi)	1.609	kilometer (km)
acre	4,047	square meter (m2)
acre	0.004047	square kilometer (km2)
square mile (mi2)	2.590	square kilometer (km2)
acre-foot (acre-ft)	1,233	cubic meter (m3)
cubic foot per second (ft3/s)	0.02832	cubic meter per second (m3/s)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F=(1.8×°C)+32

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C=(°F-32)/1.8

Datums

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Abbreviations and Acronyms

7dADM	7-day running average of the daily maximum
FERC	Federal Energy Regulatory Commission
ODEQ	Oregon Department of Environmental Quality
NTP	Natural Thermal Potential
PGE	Portland General Electric
PSU	Portland State University
RM	river mile
TMDL	Total Maximum Daily Load
USACE	U.S. Army Corps of Engineers
USGS	U.S. Geological Survey

First posted August 17, 2010