Palisades is one of the largest river terraces along the Colorado River formed by debris flows from Palisades Creek and abundant sand left by Colorado River floods.
This broad, relatively flat delta is rich in cultural resources, containing the remains of numerous pueblos, fire features, wall alignments, and artifacts.
Their condition has been deteriorating due to severe erosion caused by arroyo and gullying cutting and the loss of sediment due to the existence of the Glen Canyon Dam.
The greatest amount of impact occurs from run-off channels that cut through these cultural deposits on their way to the Colorado River.
These drainages that empty directly into the river are referred to as river-based streams.
These streams constantly expose new features and destroy others.
Because of this continued erosional downcutting, remedial actions were warranted to decrease the erosional process and the loss of cultural material.
A team approach was adopted by the signatories to the Programmatic Agreement. Three years of discussions and visits to the area by Programmatic Agreement representatives and National Park Service archaeologists” resulted in a plan of action.
In May, 1995, a four day stabilization workshop at Lee’s Ferry was organized, centering on a remedial action plan for Palisades.
The general thought was that Palisades needed erosion control measures that would enable sediment from the drainage systems to be captured, thus stabilizing the cuts.
A sediment catchment system would, theoretically, not only lessen the erosion of exposed features, but also preserve features and materials below the surface.
On-site evaluations and implementation of these erosion control measures were scheduled for September, 1995.