An open modular ditch liner includes a plurality of open liner sections and
at least one alignment key. A substantially concave shape is formed in a
top of each open liner section. At least one key slot is preferably formed
on at least one side of each open liner section to receive at least one
alignment key. The key slot may have an interference fit. An angle may be
formed on at least one end of each open liner section. A key block with
the same length of a open liner section may be used as an alignment key. A
riser block may be used to terminate at least one side of at least one
open liner section.
