CHARACTERISTICS OF THE HIGH PLAINS AQUIFER*

                                                             State
                                    ------------------------------------------------------
Characteristic    Unit    Total     CO      KS      NE     NM     OK     SD      TX     WY

Area underlain 
by aquifer        mi2     174,050  14,900  30,500  63,650  9,450  7,350  4,750  35,450  8,000 

% of total 
aquifer area       %         100     8.6    17.5    36.6    5.4    4.2    2.7    20.4    4.6

% of each state
underlain by
aquifer            %          --    14      38      83      8     11      7      13      8

Average area-
weighted 
saturated 
thickness in 
1980               Ft        190    79     101     342     51     130   207     110    182

Volume of 
drainable water 
in storage in    Million 
1980             acre-ft   3,250   120     320    2,130    50     110    60     390     70

* Modified from Gutentag and others, 1984. For a more complete reference, see the bibliography.
Table modified from Dugan and others, 1994.