The raising and release of the fish are part of a multi-million dollar project to create more fish habitat in the Potomac and to improve the river's fisheries.
(The raising and release of the fish; are; part of a multi-million dollar project) (a multi-million dollar project; to create; more fish habitat in the Potomac)
The raising and release of the fish a multi-million dollar project
are to create
part of a multi-million dollar project
more fish habitat in the Potomac