CHARLESTON, S.C. — A nearly 350-year-old plantation in South Carolina is getting more than $3 million to improve the water flow in its ponds and wetlands.

Magnolia Gardens in Charleston says the work should improve the diversity of plants and animals on its 500-acre site.

Officials say Ducks Unlimited is giving $1 million for the project, while the other $2.2 million is coming from state, federal and private sources.

The project’s goal is to restore the flooding and drainage of Magnolia Gardens’ old tidal rice fields. Over time, officials say culverts that should direct rainwater from ponds into the Ashley River have been clogged with vegetation and sediment.

Magnolia Gardens was founded in 1676 and opened its gardens to the public in 1870.