Twist and lock removable bollard

A bollard assembly, comprising:

• a post including a plurality of locking flanges or pins;
• and
• a cooperating base defining a post receiver, the base including at least one interior wall including a plurality of cooperating locking grooves each disposed, dimensioned and configured to receive an end of a one of the plurality of locking flanges or pins;
• wherein each of the plurality of cooperating locking grooves includes at least one portion defining a substantially vertical pathway and at least one intersecting portion defining a substantially horizontal pathway.

A bollard assembly, comprising:

• a post including a plurality of locking flanges or pins;
• and
• a cooperating base defining a post receiver, the base including at least one interior wall including a plurality of cooperating locking grooves each disposed, dimensioned and configured to receive an end of a one of the plurality of locking flanges or pins;
• wherein each of the plurality of cooperating locking grooves is defined by a top portion and a bottom portion each defining a substantially vertical pathway, and an intersecting intermediate portion defining a plane oriented substantially perpendicularly to the top portion and the bottom portion.