Argh! That's an awful picture, Darrell!
First time Scobee went under water after we built it in 1986, everything hard-surface was covered in very fine silt. Fine, brown. When dry it was like a dust bin. When wet, it was as slippery as ice. The county recognized the liability for slip-and-fall and came out and pressure washed everything that was hard. The concrete circles were back to original state, so white it was like flying on a snow field with the glare and the reflected light sunburns.
Tommy Fluker and I were flying F2C together at the time, needed practice, so we went out with hoses and washed down 1/4 of one circle to have a landing and take-off spot. Next weekend the place was spotless!
One outcome: all of the fire ant nests float to the surface. Big balls the size of a basket ball, masses of live fire ants. But floating on the surface, they were subject to the wind which then blew them off to the edges of the park. For two years we didn't have any fire ants on the flying field at all!
Hope it works out this time.