diff --git a/undocumented-keys.txt b/undocumented-keys.txt
index f4918347fbe36d185e0627c69bdbbe17b8162928..e7ac5c14400bb5d2d8312f5c80afbb160e1d0165 100644
--- a/undocumented-keys.txt
+++ b/undocumented-keys.txt
@@ -18,11 +18,6 @@ diffusion.rtol
 diffusion.verbose_solver
 eb2.extend_domain_face
 fab.format
-hopper.center
-hopper.direction
-hopper.funnel_height
-hopper.funnel_radius
-hopper.orifice_radius
 mfix.advect_momentum
 mfix.advect_tracer
 mfix.agg_grid_size
@@ -31,22 +26,17 @@ mfix.checkpoint_files_output
 mfix.constraint.include_depdt
 mfix.geom_chk_ccse_regtest
 mfix.monitors.[monitor_name].count
-mfix.overstep_end_time
 mfix.particle_sorting_bin
 mfix.plt_D_g
 mfix.plt_MW_g
 mfix.plt_X_g
 mfix.plt_chem_txfr
-mfix.plt_cp_g
-mfix.plt_cp_gk
-mfix.plt_h_g
 mfix.plt_h_gk
 mfix.plt_k_g
 mfix.plt_proc
 mfix.plt_proc_p
 mfix.plt_trac
 mfix.plt_txfr
-mfix.redistribute_after_initial_nodal_proj
 mfix.reports.mass_balance_int
 mfix.reports.mass_balance_per_approx
 mfix.solids.[region_name].plt_acceleration