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2020 Detail for 02091-01 Non-Metallic Manhole Frame and Cover
02912-01 Tree Root Barriers (Circular)
2021 Detail for 02091-01 Non-Metallic Frame and Cover (effective October 1, 2021)
Last updated: July 6, 2021
01562-06 Tree Protection Trench Requirements
01562-05B Tree Protection Tunneling Requirements