We received almost two inches of rain last night in three to four hours. I checked the recontoured drainage around the garden this morning and I think we have the majority of the problem solved.
Just to the left of the well, you can see that the land slopes gently down to the creek. In the back of the garden (outlined by the posts), the water is directed away from the garden by a small levee at the side of a freshly cut road. I couldn't find much new silt in the garden.
There was no standing water this morning even though the ground was thoroughly soaked.
I will be planting grass on all the bare spots this fall, and the garden fence will start going up this week. Only four months late, but who's counting.