Pacific Northwest Regional Hydrological Map AL a world of possibilities unfolds

a world of possibilities unfolds on your lap

This beautiful map was the result of an exploration under the direction of the Office of Explorations and Surveys headed by 1st

or Montezuma's Grasshopper

using USGS data to show the contour lines of the mountains and a dot to represent the resort base

Pacific Northwest Regional Hydrological Map AL a world of possibilities unfoldsOur series of regional hydrological maps show the Water Resource Regions of the USA which is the first level of classification used by the USGS. Its purpose is to divide the US into smaller hydrologic units which are then subdivided. The 21 major Water Resource Regions contain the drainage area of either a major river or the combined drainage areas of a series of rivers. Water is literally the lifeblood of our country. If youre drawn to water, you