The Official City of Norfolk Nebraska Home Page The Official City of Norfolk Nebraska Home Page

.



City of Norfolk, Nebraska on Facebook
Facebook
Follow me on Twitter
Twitter
City of Norfolk, Nebraska on YouTube
YouTube
309 N 5th St, Norfolk, NE 68701
Phone: (402) 844-2000

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Wellhead Protection Plan

Section 1.  Wellhead Protection Area Map

The following map shows the WHPA for Norfolk ’s West Well Field.  It was drawn originally by the Nebraska Department of Environmental Quality in 2001.  The delineation takes into account such factors as well pumping history, geologic logs and local hydrogeology of the area, based on available data that was collected from irrigation, domestic and public supply wells.   

The Nebraska Department of Environmental Quality WhAEM Computer model was used to generate and delineate the map limits.  The model was run in April 2005, and included all of the current pumps and pumping rate data for the City’s West Well Field as of that date.  A protection threshold was established using the 20-year time-of-travel (TOT) radius, which is the estimated distance from which groundwater contaminants could be drawn into the given PWS well(s) if present well pumping rates were continued for 20 years. Also included are TOT radii at 10 years, 2 years, 1.5 years, 1 year, and 180 days.  These TOT thresholds are useful in calculating the amount of time it would take pollution to reach a public water supply well and contaminate the drinking water supply if a surface spill would occur in the WHPA.  

Wellhead Protection Area Map
Click to enlarge