diff --git a/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/c_ConstantPermeability.md b/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/c_ConstantPermeability.md
new file mode 100644
index 0000000000000000000000000000000000000000..21d048791a8e77d99daebd36c6a9ff36b8eff2df
--- /dev/null
+++ b/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/c_ConstantPermeability.md
@@ -0,0 +1 @@
+Constant permeability with given value. Independent of aperture.
diff --git a/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/t_value.md b/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/t_value.md
new file mode 100644
index 0000000000000000000000000000000000000000..eaebdbd8ef359b504d3661b4abaab6c239c0c22d
--- /dev/null
+++ b/Documentation/ProjectFile/material/fracture_properties/permeability_model/ConstantPermeability/t_value.md
@@ -0,0 +1 @@
+The permeability value.