Lake Chillisquaque is dammed by an earth-fill dam known as the Lake Chillisquaque Dam.
Located on the southern side of the lake, the dam is 2,000 feet (610 m) long and 54 feet (16 m) high.
The dam is 12 feet (3.7 m) wide at its highest point and the top of the dam forms an access road.
The inner part of the dam is a silty clay material, while the outside is made of weathered shale.

According to the Montour County Multi-jurisdictional Hazard Mitigation Plan, a major failure in the Lake Chillisquaque Dam could cause damage to several nearby communities, such as Strawberry Ridge and Washingtonville.
It could also result in a decrease in the output of the Montour Power Plant, causing a brownout in the area.
A severe failure of the dam is considered by the Multi-jurisdictional Hazard Mitigation Plan to be the most dangerous threat to Montour County.
Lake Chillisquaque is dammed by an earth-fill dam known as the Lake Chillisquaque Dam. Located on the southern side of the lake, the dam is 2,000 feet (610 m) long and 54 feet (16 m) high. The dam is 12 feet (3.7 m) wide at its highest point and the top of the dam forms an access road. The inner part of the dam is a silty clay material, while the outside is made of weathered shale.
According to the Montour County Multi-jurisdictional Hazard Mitigation Plan, a major failure in the Lake Chillisquaque Dam could cause damage to several nearby communities, such as Strawberry Ridge and Washingtonville. It could also result in a decrease in the output of the Montour Power Plant, causing a brownout in the area. A severe failure of the dam is considered by the Multi-jurisdictional Hazard Mitigation Plan to be the most dangerous threat to Montour County.
Lake Chillisquaque