Common use of Drainage Design Clause in Contracts

Drainage Design. The Consultant shall provide drainage layouts, drainage area maps, calculations, and design of all drainage components. The Consultant shall design all detention/retention ponds, conventional storm drainage and cross drainage in conformance with the State Hydraulic Design Manual (May 0000), Xxxxxxxxx' criteria. The drainage design will be prepared to provide for the two-lane frontage section. At a minimum the drainage items to be provided shall include the detailed drainage area maps showing the final drainage areas and inlet and storm sewer calculations for revised storm sewer flow elements. All drainage designs shall be prepared in accordance with the findings presented in the Drainage Study. The proposed tasks are listed below:  Conduct field trips to the Project site to investigate and confirm data and assumptions and assess general drainage conditions as needed;  Review previous plans and drainage reports prepared by others which relate to drainage in the Project area (to be provided by the PMC);  Prepare proposed drainage area maps for proposed improvements within the portion of the Project limits stated above;  Design drainage structures located within the Project ROW, including open ditch drainage, storm sewer, inlets, manholes, subsurface drainage at retaining walls, and inlets/internal drainage piping where required on structures;  Design and analyze the storm sewer system utilizing the WINSTORM Program and incorporate output to plan set;  Design and analyze the roadside ditches for the proposed drainage criteria and incorporate results into the plans set on the roadway plan and profile sheets;  Prepare storm sewer plan/profile drawings and special plan details, where required, for storm sewer system, laterals, junction boxes, etc. Identify potential utility conflicts during project design. Drawings will be prepared on 11” X 17” sheet at horizontal scale of 1”=100’ and vertical scale of 1”=10’; and  Design cross-culvert extensions, if required, within the Project limits. This task is the extent to which designs and calculations regarding cross-culverts is required. Required drainage work outside the ROW will be performed by others. Function Code 162: Signing, Pavement Markings and Signalization (Permanent)

Drainage Design. The Consultant Engineer shall provide drainage layouts, drainage area maps, calculations, and design of all drainage components. The Consultant Engineer shall design all detention/retention ponds, conventional storm drainage and cross drainage in conformance with the State Hydraulic Design Manual (May 0000), Xxxxxxxxx' September 2019) and Houston District’s criteria. The drainage design will be prepared to provide for the two-lane frontage section. At a minimum the drainage items to be provided shall include the detailed drainage area maps showing the final drainage areas and inlet and storm sewer calculations for revised storm sewer flow elements. All drainage designs shall be prepared in accordance with the findings presented in the Drainage Study. The proposed tasks are listed below:  • Conduct field trips to the Project site to investigate and confirm data and assumptions and assess general drainage conditions as needed;  • Review previous plans and drainage reports prepared by others which relate to drainage in the Project area (to be provided by the PMC);  • Prepare proposed drainage area maps for proposed improvements within the portion of the Project limits stated above;  • Design drainage structures located within the Project ROW, including open ditch drainage, storm sewer, inlets, manholes, subsurface drainage at retaining walls, and inlets/internal drainage piping where required on structures;  • Design and analyze the storm sewer system utilizing the WINSTORM Geopak Drainage Program and incorporate output to plan set;  • Design and analyze the roadside ditches for the proposed drainage criteria and incorporate results into the plans set on the roadway plan and profile sheets;  • Prepare storm sewer plan/profile drawings and special plan details, where required, for storm sewer system, laterals, junction boxes, etc. Identify potential utility conflicts during project design. Drawings will be prepared on 11” X 17” sheet at horizontal scale of 1”=100’ and vertical scale of 1”=10’; and  • Design cross-culvert extensions, if required, within the Project limits. This task is the extent to which designs and calculations regarding cross-culverts is required. Required drainage work outside the ROW will be performed by others. Function Code 162: Signing, Pavement Markings and Signalization (Permanentby iGET)