Dogwood 1 green is really starting to come together now. the sub-grade has been completed and approved by Billy Fuller and the crews from TDI have begun the installation of the drainage, gravel layer and greens mix. USGA spec greens consist of 4 main components that are all equally important. First, the sub-grade must reflect the final putting surface. So shaping must be precise on the bottom, so as you "fill up" the green cavity the final grade surfaces is what you would like to have. Once the sub-grade is shaped and approved. The drain lines are trenched into the sub-grade. A combination of 6 inch and 4 inch perforated drain pipes are used to properly drain the entire putting surface. A gravel layer is then evenly spread over the drain lines and sub-grade to a depth of 4 inches thick. This layer provides avenues for water to move through a porous surface quickly into the drain lines and off the green. The gravel layer is then approved, before the 12 inches of greens mix are spread over the entire putting green. This greens mix is a blend of sand and peat moss, creating an ideal soil medium for putting green turf to grow on. The mix is compacted and "floated out" to final grade and left ready for planting. Below are step by step photos of this process.
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| Sub-grade with drain lines installed |
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| Aerial photo of green sub grade with drain lines and gravel layer installation |
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| Installing gravel layer to 4 inch depth |
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| Installing greens mix over the gravel layer |
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