The city says the Koko Head Shooting Complex did not open on Friday due to a problem with the septic tank.
A private vendor responded to the scene Friday evening and is attempting to clear the system.
The Department of Parks and Recreation has not made a final decision on whether to open the complex on Saturday. Officials are hopeful the contractor will be successful at fixing the problem by Friday night.
The complex is normally open Wednesdays, Thursdays, and Fridays from noon to 4 p.m. and on the weekends from 8 a.m. to 4 p.m