There is no good time to get drainage work done in a busy market garden. However, Denis Carroll, our local drainage contractor is in much demand, so the best time was spring when he was available and before the summer growth had made moving machinery around our place even more difficult.
The approach taken was to dig 2 – 3 feet trenches and half back fill these with 1 -2 inch diameter stones. The trenches are topped with soil so they don’t interfere with veg and fruit growing areas. 
All trenches drain to the lowest point on the land, an old marl hole. This is like a woodland lake. It will be next winter and maybe even the winter after that before we hopefully appreciate all this drainage work. More related postings then!
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