Tailings Engineering

Tailings Dam Centerline Raise Minimum Berm Width for Seepage Control Calculator

Compute minimum required berm width to limit seepage exit gradient below critical threshold under steady-state flow conditions, per USACE EM 1110-2-1902 and Duncan & Wright (2005).

Runnable This tool can run, but independent engineering verification has not been established.

Quick Answer

Calculate Tailings Dam Centerline Raise Minimum Berm Width for Seepage Control

Calculator

Minimum Berm Width (m)
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Result Interpretation

Tailings Dam Centerline Raise Minimum Berm Width for Seepage Control Calculator computes Minimum Berm Width in m using the defined engineering formula and the input values provided. Minimum Berm Width is expressed in m. No universal acceptance threshold is defined by this calculator.

Worked Example

Verified calculation

Given:

  • Critical Exit Gradient = 0.25
  • Actual Exit Gradient = 0.5
  • Ratio of Filter to Tailings Hydraulic Conductivity = 5
  • Height of Tailings Section at Centerline Raise = 8

Expected Result:

  • Minimum Berm Width = 70.710678118655

Engineering Interpretation:

Under the given input conditions, the calculated result is: Minimum Berm Width = 70.710678118655 m.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.

Formula / Method

minimum berm width = 2.5 * sqrt(critical exit gradient / actual exit gradient) * ratio of filter to tailings hydraulic conductivity * height of tailings section at centerline raise

Formula family: formula_tailings_tailings_dam_centerline_raise_minimum_berm_width_for_seepage_control_calculator

Variables

SymbolLabelRoleDescription
seepage_exit_gradient_critical Critical Exit Gradient INPUT Critical Exit Gradient
seepage_exit_gradient_actual Actual Exit Gradient INPUT Actual Exit Gradient
hydraulic_conductivity_ratio Ratio of Filter to Tailings Hydraulic Conductivity INPUT Ratio of Filter to Tailings Hydraulic Conductivity
tailings_height Height of Tailings Section at Centerline Raise INPUT Height of Tailings Section at Centerline Raise
berm_width Minimum Berm Width OUTPUT Minimum Berm Width

Calculation Steps

  1. Enter the critical exit gradient in dimensionless.
  2. Enter the actual exit gradient in dimensionless.
  3. Enter the ratio of filter to tailings hydraulic conductivity in dimensionless.
  4. Enter the height of tailings section at centerline raise in m.
  5. Step 1: Compute minimum berm width.
  6. Read the minimum berm width (m) from the results.

Engineering Summary

Calculate Tailings Dam Centerline Raise Minimum Berm Width for Seepage Control

Frequently Asked Questions

What does this calculator calculate?

The Tailings Dam Centerline Raise Minimum Berm Width for Seepage Control Calculator estimates Minimum Berm Width based on the input parameters you provide

Why is critical exit gradient important in this calculation?

critical exit gradient is used directly in the calculation of minimum berm width. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter critical exit gradient in dimensionless, the calculator uses it in the engineering formula to compute the output

How should I interpret the result minimum berm width?

The calculator outputs minimum berm width in m. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Critical Exit Gradient (dimensionless), Actual Exit Gradient (dimensionless), Ratio of Filter to Tailings Hydraulic Conductivity (dimensionless), Height of Tailings Section at Centerline Raise (m). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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