He has been clearing regularly a 24-inch culvert that the brook runs through under Northern Avenue, Stratton said, but the beavers keep clogging it up.

Beaver dams create problems in culverts GRAFTON, N.D. - Walsh County officials say beavers are building dams in culverts, causing water to back up, flood and wash out roads.

He has been clearing regularly a 24-inch culvert that the brook runs through under Northern Avenue, Stratton said, but the beavers keep clogging it up.

So when beavers started building dams in the 36-inch drainage culvert under North Pacific Avenue, causing a pond to grow and spread across his property, Chapin naturally began introducing himself ...

Beavers building dams, plugging culverts raise concerns of flooding The relentless rodents are giving Farmingdale public works officials headaches over water levels in wetlands near Cousins Lane.