mikep187 wrote:
I am trying to plant grass over a spot that had to be dug up last fall
to replace a pipe, the area is all clay.. I laid the topsoil
yesterday then put seed and fertilzer down, but today a heavy rain
storm washed away some sections of topsoi, and most likely the seed
alsol. What do I need to do to keep the topsoil on long enough for
the grass to start?

If it is only a "spot", get some sod. If it is an area constantly
washed out, consider shrubs or groundcover that will hold soil better.