The Collaborative International Dictionary of English v.0.48:

Acequia \A*ce"qui*a\ ([aum]*s[=a]"k[-e]*[.a]; Sp.
   [aum]*th[=a]"k[-e]*[aum]), n. [Sp.]
   A canal or trench for irrigating land. [Sp. Amer.]
   [Webster 1913 Suppl.]

U.S. Gazetteer Places (2000):

Acequia, ID -- U.S. city in Idaho
   Population (2000):    144
   Housing Units (2000): 51
   Land area (2000):     0.308283 sq. miles (0.798448 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.308283 sq. miles (0.798448 sq. km)
   FIPS code:            00280
   Located within:       Idaho (ID), FIPS 16
   Location:             42.668387 N, 113.595046 W
   ZIP Codes (1990):     83350
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Acequia, ID
    Acequia