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Contact Information: Gary A. McFarland, P.E. 4th Avenue North, P.O. Box 36600 Billings, MT 59107 (406) 247-7091 gary.mcfarland@mail.ihs.gov Activity: Civil / Landscaping Keyword: Storm Drain CSO No.:2630 Recommended Action: Minimum slope of drain ditches should be 1:3 to allow for mowing. Location: Billings Area Office Program: OEHE/AFM Date: 11/23/1999