Howard County officials will announce Wednesday an update in a major flood mitigation project in Ellicott City.

The Ellicott City Safe and Sound plan, launched in 2018 after the town was hit by deadly floods in 2011, 2016 and 2018, aims to protect Historic Ellicott City's Main Street from future damage.

The plan includes multiple projects designed to keep water away from Historic Ellicott City.

The projects include five retention ponds and two water conveyance projects, such as culverts under Maryland Avenue and the North Tunnel project . Two retention ponds had been completed as of February.

The county said Tuesday the third and largest H-4 stormwater retention pond located along the north side of Frederick Road, just west of US-29 has now been completed.

The newest pond has the

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