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Rift TD has three Pond Control options:

•Defined Freeboard.

•Defined Elevation.

•Defined Volume.

Data fields vary depending on the specified Pond Control:

•Defined Freeboard:

oThe Elevation Difference (Freeboard) from the Deposition Elevation to the Pond Elevation.

oThe Deposition Elevation Control:

▪Minimum,

▪Maximum, or

▪Average Deposition Elevation..

•Defined Elevation:

oThe Pond Elevation as a function of the Deposition Elevation.

oThe Deposition Elevation Control:

▪Minimum,

▪Maximum, or

▪Average Deposition Elevation.

•Defined Volume:

oThe Pond Elevation as a function of the Cumulative Deposition Tonnage.

oIteration Parameters:

▪Maximum Number of Iterations: Rift TD will stop iterating if it exceeds the maximum number of iterations.

▪Volume Tolerance: Specifies the maximum volume difference for convergence.

▪Elevation Tolerance: Specifies the maximum elevation difference between iterations for convergence. Note that you may exceed the volume tolerance.