Drainage Design. 4.8.1 The Developer shall provide a drainage system which will not increase, alter or affect the flow of surface waters, nor contribute to same, so as to damage, flood or adversely affect any property, either upstream or downstream of the Subdivision. The Developer shall also provide to the City the formal written opinion of a certified and licensed professional engineer certifying, as a professional engineer, that he has reviewed the entire watershed within which the subdivision is located and that upon full development at the greatest allowable use density, under existing zoning of all land within the watershed, the Subdivision will not increase, alter or affect the flow of surface waters, nor contribute to same, so as to damage, flood or adversely affect any property, either upstream or downstream of the Subdivision. Further, the Developer agrees to hold harmless and to defend the City and the City Engineer from any claim, cause of action or liability, alleged and/or proven, to have arisen directly or indirectly from alteration affecting the surface water by reason of the Developer’s design, construction, installation or the development itself, in whole or part. The aforesaid indemnity agreement includes, without limitation, the reasonable expenses of the City incurred in defending itself against any matter covered by such indemnity agreement, including attorney fees and expenses of litigation.
Drainage Design. 1. Delineate drainage area tributaries and determine runoff in accordance with the NJDOT “Design Manual Roadway” as revised.
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 shall finalize the design of the drainage and stormwater management systems. The Consultant shall verify the number and location of pond sites, floodplain compensating storage sites, and/or water quality and quantity treatment needed to appropriately meet the needs of the project.
Drainage Design. As directed by the DEPARTMENT, the CONSULTANT will conduct the following design services and submittals. Refer to the Roadway and Bridge Standard Design Scope of Services. • Total Maximum Daily Loads (TMDLs) • Basin Management Action Plans (BMAPs)
Drainage Design. The hydrology and hydraulics calculations will have the following for one modified culvert:
Drainage Design. It is anticipated that no hydraulic design will be necessary since the ditch company requirements are limited to clear width and height of the structure. For the roadway stormwater drainage, match existing curb and gutter drainage where possible. Where new curb and gutter is to be provided, terminate at a reasonable distance past the bridge. For the purpose of the hour estimate, it will be assumed that only a letter report will be necessary and not a full drainage report. KDG will prepare a letter report to justify the roadway and bridge modifications, in accordance with the City criteria.
Drainage Design. The Engineer shall determine roadway curb and gutter ponding widths in conformance with the State Hydraulic Design Manual (July 0000), Xxxxxxxxx’ criteria, and any specific guidance provided by the State. Storm drain design shall be performed using InRoads Storm & Sanitary. The Engineer shall perform the following:
Drainage Design. The Engineer will perform work generally consisting of updating the 30% drainage schematic to incorporate latest roadway design elements and survey data.
Drainage Design. The Engineer shall develop design details that minimize the interference with the passage of traffic or incur damage to the highway and local property. The Engineer shall provide drainage layouts, drainage area maps, and design of all drainage components. The Engineer shall design all detention/retention ponds, conventional storm drainage and cross drainage in conformance with the State Hydraulic Design Manual (May 0000), Xxxxxxxxx’ criteria, and any specific guidance provided by the State. Storm drain design shall be performed using OpenRoads 3D design and GEOPAK drainage. Cross drainage design shall be performed using HY 8 for non-bridge class culverts. HEC-RAS will be used for bridges and bridge-class culverts. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic gradeline throughout the whole system, within project limits, for the design frequency(ies). Detention/retention ponds shall be analyzed using HEC-HMS. The Engineer shall coordinate with the State and designers of adjacent projects to check that all proposed drainage systems accommodate the proposed construction phasing plan. The Engineer shall perform the following: DocuSign Envelope ID: BB9CB9F4-FE9A-4C53-8095-241296FD342F
