Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins
  • Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of flooding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitoring activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance from the White House, the CDC, and state and local authorities.

  • Introducing The Next Generation of USGS Water Data for the Nation
  • Full News RSS icon

Site Map for Iowa

Click to hide state-specific text

Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


USGS 05451080 South Fork Iowa River near Blairsburg, IA


Hamilton County, Iowa
Hydrologic Unit Code 07080207
Latitude  42°32'37", Longitude  93°35'22" NAD83
Drainage area 12  square miles
Gage datum 1,164.91 feet above NGVD29
Location of the site in Iowa