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- Culvert pitching is the installation of stones, boulders, or concrete blocks around culvert inlets and outlets to prevent erosion and stabilize soil, typically using 50–70 cm boulders. It protects embankments by controlling scour from concentrated water flow, acting as a crucial long-term reinforcement measure.Culvert pitching is the installation of stones, boulders, or concrete blocks around culvert inlets and outlets to prevent erosion and stabilize soil, typically using 50–70 cm boulders. It protects embankments by controlling scour from concentrated water flow, acting as a crucial long-term reinforcement measure.
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