Duchesne Tunnel Upstream

Provo River Project FeaturesDuchesne Tunnel SystemDuchesne Diversion

Duchesne Diversion

What is it?

The Duchesne Diversion Dam is a concrete and rockfill dam located on the north fork of the Duchesne River, approximately 21 miles east of Kamas, Utah in the Uinta mountains.

The Diversion slows or stops water flow in the Duchesne River with a remotely controlled gate that opens and closes based on the water level in the forebay, or the dam area. When the bypass gate is lowered, the water fills the forebay and another gate is opened, allowing the water to be diverted into the tunnel. Once the required water flow is reached for the tunnel, the bypass gate is opened and any additional flow is allowed to bypass the tunnel and continue down the Duchesne River.

Why was it built?

In order to access the Provo River Project and Association water rights in the Duchesne River and Little Deer Creek, the water is slowed and diverted into the Duchesne Tunnel.

When was it built?

The dam was constructed in 1952.

How big is it?

The weir length of the dam is 270 feet and a diversion capacity of 621 cfs.

What is the Association’s responsibility?

It is the Association’s responsibility to maintain the depth of the dam by clearing out debris and layers of sediment. The Association also makes sure the bypass and tunnel gates don’t become clogged with debris, and ensures that the controls are working properly so water can be diverted into the tunnel for use by shareholders.

Duchesne Diversion    
Duchesne Tunnel Panorama