Useful Links:

Unit Conversion
Google Earth PLSS (Section, Township, Range)
USDA Hydrology and Hydraulics
USBR Water Measurement Manual
Agricultural Water Conservation Clearinghouse
Colorado Water Resources USGS Site
Colorado Snow Survey Program
Colorado Climate Center
Colorado Dam Safety Program
Colorado Quad Map Index
USGS Map Locator and Downloader
Periodic Table of Elements
Martindale’s Reference Desk: Civil Engineering Center

Hydrologic Cycle:

Behold, God is great, beyond our understanding; the number of his years is unsearchable. For he draws up drops of water, which distill as rain from the mist, which the clouds rain and pour down in showers on man. ~Job 36:26-27