1. Dig a really big hole. (7' long by 8' deep by 5' wide)
2. Order the culvert and have them cut a 3' diameter hole in the 4' culvert to be able to nest the two together.
3. Place the 4' culvert in the hole, positioning it with a slight downward tilt for drainage.
4. Place the ventilation tubes - 3" diam pcv tubing with a screened curved top to keep rain and bugs out.
5. Place the 3' culvert into the hole - this needs to be a tight fit.
6. Backfill
7. Place the ladder into the 3' culvert
8. Build the insulated trap door into the porch.
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