06-11-18 Drainage and Flooding Committee Meeting

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REQUEST FOR DRAINAGE COMMITTEE AGENDA ITEM Agenda Date Requested: June 11, 2018 Requested By: L. Wingate/D. Pennell Department: Public Works Report: �*, Resolution: C-Ordinance: C- Exhibits : Appropriation Source of Funds: Account Number: Amount Budgeted: Amount Requested: Budgeted Item: 4, YES C-NO SUMMARY CivilTech Engineering prepared a drainage study, in 2006, for the reconstruction of Crestlane Street (also referred to as Barbours Cut Boulevard) from State Highway 146 to Barbours Cut Terminal, a project length of approximately 12,700 linear feet or 2.4 miles. Drainage improvements were evaluated along Harris County Flood Control District (HCFCD) Unit F210-00-00 (Bob's Gully) to improve outfall drainage from Barbours Cut Blvd. Flooding problems exist(ed) between Barbours Cut Blvd and West Main Street due to insufficient channel capacity and a flow restriction at the culvert crossing at East Main Street. The impact analysis concluded that the additional flow capacity provided through East Main Street would increase downstream water surface elevations. It is noted in the study that "the increases in the water surface elevations are maintained within the existing channel banks. Therefore, no adverse impacts would occur along HCFC Unit F210-00-00 in terms of out of bank flooding." HCFCD Unit F210-00-00 is under the jurisdiction of the City of Morgan's Point, Texas, and the HCFCD. The HCFCD has a 60-foot drainage easement along the channel from Bayridge Street to East Main Street. The City of Morgan's Point has indicated that HCFC Unit F210-00-00 has channel slope failures and erosion problems which have jeopardized private property and utilities. They have expressed their concerns to the Harris County Flood Control District and have requested a channel maintenance project to correct the channel erosion problems. Action Re quire d: Approved for Drainage Committee Agenda Corby D. Alexander, City Manager Date