In Iowa, United States
How Geocaching Works
Use of geocaching.com services is subject to the terms and conditions in our disclaimer
The United States Geological Survey (USGS) is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology, geography, geology, and hydrology. The cache is near a station that monitors hydrology data for the nearby Perry Creek.
(No hints available.)
Last Updated: on 12/12/2015 6:50:54 PM (UTC-08:00) Pacific Time (US & Canada) (2:50 AM GMT)
Coordinates are in the WGS84 datum