diff --git a/CHANGELOG.md b/CHANGELOG.md
index a139e4308..3b5ba97c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 ### Added
+- Added the ability to calculate the water content within the oceanic plate feature and the subducting plate feature. The implementation samples the temperature within the feature, calculates a lithostatic pressure, and determines the water content using parameterized phase diagrams for 4 different lithologies: sediment, mid ocean ridge basalt (MORB), gabbro, and peridotite from [Tian et al., 2019](https://doi.org/10.1029/2019GC008488). \[Daniel Douglas; 2024-08-20; [#661](https://github.com/GeodynamicWorldBuilder/WorldBuilder/pull/661)\]
 - Added a `random uniform distribution deflected` grains model for all features that allows an initial texture computed from a random uniform distribution of rotation matrices applied to a given orientation specified as a set of Euler angles or a rotation matrix. \[Yijun Wang; 2024-06-06; [#713](https://github.com/GeodynamicWorldBuilder/WorldBuilder/pull/713)\]
 ### Changed
 - In the "mass conserving" model, change the name of the entry "plate velocity" to "spreading velocity" \[Haoyuan Li; 2024-03-11; [#694](https://github.com/GeodynamicWorldBuilder/WorldBuilder/pull/694)\]