Concrete Gravity Dam Stability Tool: The application analyses a single, user-defined dam cross-section (a closed polygon) subjected to self-weight, hydrostatic and uplift pressure, silt and backfill pressure, overtopping pressure, floating-debris impact, post-tensioned anchor forces, concentrated masses, and seismic inertia and hydrodynamic pressure. From the resulting force system the tool computes the base stress distribution (including cracking and reduced contact area under net tension), the sliding, overturning and uplift/floating safety factors, the stability of any number of horizontal or inclined lift (construction) joints within the dam body, and — independently — the stability of a foundation-level weak plane and/or a downstream passive rock wedge. All quantities are computed per metre of dam length (a standard two-dimensional gravity-dam convention); an optional monolith width is used only to report informational total forces and does not alter any safety factor. Beyond a single deterministic run, the tool supports: a library of named load cases combined with serviceability (SLS) and ultimate (ULS) partial load and strength-reduction factors; an incremental-loading mode that ramps the headwater level to trace the governing failure mode as load intensity increases; and a Monte Carlo / Latin Hypercube probabilistic module that propagates uncertainty in key material and loading parameters through to the computed safety factors, reporting probability of failure, reliability index, and parameter sensitivity.