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I found this but am not sure which portions apply. Section 6 E mentions minimum channel depth of 18 inches. But this isn't a rip rapped channel. It's a residential channel and there is no minimum depth stated.[URL unfurl="true"]https://www.hanovercounty.gov/DocumentCenter/View/140/Drainage-Design-Handbook-PDF[/URL]
I found this but am not sure which portions apply. Section 6 E mentions minimum channel depth of 18 inches. But this isn't a rip rapped channel. It's a residential channel and there is no minimum depth stated.
[URL unfurl="true"]https://www.hanovercounty.gov/DocumentCenter/View/140/Drainage-Design-Handbook-PDF[/URL]