Area experienced a 10"" to 11"" rainfall event with 8"" falling in the first 24 hours. This event followed 8.2"" in feb. and 3.5"" earlier in March. runoff overwhelled. 8"" turbine pump in the sump at surface of drift mine even with the start of. 8"" diesel backup. Water raised such that water entered the mine beginning at 2 pm on 3/18 and mine became inundation at 7 am on the 4th.