Common use of Drainage Study Clause in Contracts

Drainage Study. 1. Perform a drainage study of the project watershed 1. Determine the drainage requirements for the project. 1. The study will consider the location of retention ponding areas for storing runoff from the project. The study will be documented in a bound Drainage Study report signed and sealed by a Registered Professional Engineer in the State of Texas . 2. The study will identify any right of way requirements for locating and constructing new ponding areas and/or other drainage appurtenances required for the project.. 2. Coordinate with the County, TxDOT, and adjoining developers to check that all proposed drainage systems accommodate the proposed construction. 3. Design services will include the following: 1. Prepare drainage area maps. 2. Prepare culvert plan and elevation sheets. 3. Prepare plan/profile sheets for storm drain systems and outfall ditches. 4. Select standard details from County or TxDOT list of standards for items such as inlets, manholes, junction boxes and end treatment, etc. 5. Prepare details for non-standard inlets, manholes and junction boxes. 6. Prepare drainage details for outlet protection, outlet structures and utility accommodation structures. 7. Identify pipe strength requirements. 8. Prepare drainage facility quantity summaries. 9. Identify potential utility conflicts and design around them, wherever possible. 10. Take into consideration drainage impacts to pedestrian facilities, utilities, driveways, retaining walls and concrete traffic barriers. 11. If applicable, prepare Hydraulic Data Sheets for any bridge or cross drainage structures at outfall channel. (Indicate site location such as name of creeks and stations) 12. Develop plans for all temporary drainage facilities necessary to allow staged construction of the project and to conform with the phasing of adjacent construction projects without significant impact to the hydraulic capacity of the area. • Prepare design layouts, drainage area maps, and design of all drainage components. The Engineer shall design all conventional storm drainage and cross drainage in conformance with El Paso County design guidelines. • Storm drain design will be performed using WinStorm or GEOPAK Drainage. Cross drainage design will be performed using WINSTORM, HY 8 or HEC RAS • Three copies of the bound Drainage Study report.

Drainage Study. 1. Perform a drainage study of the project watershed. 11.1. Determine the drainage requirements for the project. 11.1.1. The study will consider the location of retention ponding areas for storing runoff from the project. The study will be documented in a bound Drainage Study report signed and sealed by a Registered Professional Engineer in the State of Texas Texas. 21.1.2. The study will identify any right of way requirements for locating and constructing new ponding areas and/or other drainage appurtenances required for the project... 2. Coordinate with the County, TxDOTTXDOT, and adjoining developers to check that all proposed drainage systems accommodate the proposed construction. 3. Design services will include the following: 13.1. Prepare drainage area maps. 23.2. Prepare culvert plan and elevation sheets. 33.3. Prepare plan/profile sheets for storm drain systems and outfall ditches. 43.4. Select standard details from County or TxDOT TXDOT list of standards for items such as inlets, manholes, junction boxes and end treatment, etc. 53.5. Prepare details for non-standard inlets, manholes and junction boxes. 63.6. Prepare drainage details for outlet protection, outlet structures and utility accommodation structures. 73.7. Identify pipe strength requirements. 83.8. Prepare drainage facility quantity summaries. 93.9. Identify potential utility conflicts and design around them, wherever possible. 103.10. Take into consideration drainage impacts to pedestrian facilities, utilities, driveways, retaining walls and concrete traffic barriers. 113.11. If applicable, prepare Hydraulic Data Sheets for any bridge or cross drainage structures at outfall channel. (Indicate site location such as name of creeks and stations) 123.12. Develop plans for all temporary drainage facilities necessary to allow staged construction of the project and to conform with the phasing of adjacent construction projects without significant impact to the hydraulic capacity of the area. • Prepare design layouts, drainage area maps, and design of all drainage components. The Engineer shall design all conventional storm drainage and cross drainage in conformance with El Paso County design guidelines. • Storm drain design will be performed using WinStorm or GEOPAK Drainage. Cross drainage design will be performed using WINSTORM, HY 8 or HEC RAS • Three copies of the bound Drainage Study report.

Drainage Study. 1. Perform a drainage study a. Hydrologic Study & Modeling Detail the criteria, methodologies, results and recommendations of the analysis. • Collect, prepare and modify existing hydrologic & hydraulic models to reflect the existing & proposed schematic. Compare and document the study results with existing studies or models from the County, FEMA, cities, etc., if available. • Provide existing and proposed condition drainage area maps for each outfall from the project watershedarea and/or each cross-drainage structure location. • Provide a comparison of existing vs proposed condition runoff patterns at each outfall from the project area. • Atlas 14 impacts will be reviewed and incorporated. 1. Determine the drainage requirements b. Hydraulic Study & Modeling • Provide hydraulic models and/or calculations for the projectexisting and proposed structures. • Document existing conditions including size, length, flowline elevations, scour, flooding, erosion, tailwater or other notable conditions. Document source of hydraulic/channel cross sections. • Prepare preliminary design and layout for the cross-drainage structures and major roadside channels using appropriate software (HEC-RAS, HY-8, SWMM, Bentley or other approved hydraulic modeling software). All bridges and multiple box culverts to be analyzed in HEC- RAS. • Compare and document the study results with existing studies or models, Identify and document need for stakeholder coordination or permitting. • Recommend minimum pavement elevations based on design event WSEL for cross drainage flood elevations & document WSEL on schematic profile. c. FEMA Coordination (Brushy Creek Tributary 1. The study will consider the location of retention ponding areas for storing runoff from the project. The study will be documented in a bound Drainage Study report signed and sealed by a Registered Professional Engineer in the State of Texas . 2. The study will identify any right of way requirements for locating and constructing new ponding areas and/or other drainage appurtenances required for the project.. 2. , Blockhouse Creek, & Spanish Oak Creek): • Coordinate with the County’s GEC and Local Floodplain Administrator as necessary throughout the project. • Determine if a CLOMR or LOMR will be required and/or recommended. If a CLOMR or LOMR is required after the Preliminary Drainage Report and through coordination with the Local Floodplain Administrator, TxDOT, a supplemental work authorization would be required. d. Impact and adjoining developers to check that Mitigation Analysis: • Provide documentation of all proposed drainage systems accommodate adverse impacts resulting from the proposed construction. 3facility in the proposed condition. Design services will include the following: 1. Prepare drainage area maps. 2. Prepare culvert plan and elevation sheets. 3. Prepare plan/profile sheets for storm drain systems and Provide a comparison of existing vs proposed condition at each outfall ditches. 4. Select standard details from County or TxDOT list of standards for items such as inlets, manholes, junction boxes and end treatment, etc. 5. Prepare details for non-standard inlets, manholes and junction boxes. 6. Prepare drainage details for outlet protection, outlet structures and utility accommodation structures. 7. Identify pipe strength requirements. 8. Prepare drainage facility quantity summaries. 9. Identify potential utility conflicts and design around them, wherever possible. 10. Take into consideration drainage impacts to pedestrian facilities, utilities, driveways, retaining walls and concrete traffic barriers. 11. If applicable, prepare Hydraulic Data Sheets for any bridge or cross drainage structures at outfall channel. (Indicate site location such as name of creeks and stations) 12. Develop plans for all temporary drainage facilities necessary to allow staged construction of the project and to conform with the phasing of adjacent construction projects without significant impact to the hydraulic capacity of the area. • Prepare design layoutsProvide plans to mitigate adverse impacts to nearby buildings, drainage area mapsproperty access points, and design of all drainage components. The Engineer shall design all conventional storm drainage and cross drainage in conformance with El Paso County design guidelinesrunoff patterns. • Storm drain If detention is recommended or required prepare a routing analysis to determine preliminary size and ROW needs for proposed detention ponds. • Coordinate with County’s GEC to determine need for maintenance or landscaping setbacks for ponds. Criteria for this determination shall be based, in part, on drainage information provided by the Engineer and on the preliminary design will for the project area. • Calculate the volume of fill to be performed using WinStorm or GEOPAK Drainage. Cross drainage placed in the 100-year floodplain and recommend locations for compensatory storage. e. Water Quality Analysis: • Provide water quality design will be performed using WINSTORM, HY 8 or HEC RAS • Three copies of the bound Drainage Study reportincluding preliminary TSS removal calculations and permanent BMP design and placement.

Drainage Study. 1. Perform a drainage study of the project watershed 1. Determine Project watershed to determine the drainage requirements for the projectProject. 1. The study will consider the location of retention ponding areas for storing runoff from the project. The study will be documented in a bound Drainage Study report signed and sealed by a Registered Professional Engineer in the State of Texas Texas. 2. The study will identify any right of way requirements for locating and constructing new ponding areas and/or other drainage appurtenances required for the project... 2. Coordinate with the County, TxDOT, and adjoining developers to check that all proposed drainage systems accommodate the proposed construction. 3. Design services will include the following: 1. Prepare drainage area maps. 2. Prepare culvert plan and elevation sheets. 3. Prepare plan/profile sheets for storm drain systems and outfall ditches. 4. Select standard details from County or TxDOT list of standards for items such as inlets, manholes, junction boxes and end treatment, etc. 5. Prepare details for non-standard inlets, manholes and junction boxes. 6. Prepare drainage details for outlet protection, outlet structures and utility accommodation structures. 7. Identify pipe strength requirements. 8. Prepare drainage facility quantity summaries. 9. Identify potential utility conflicts and design around them, wherever possible. 10. Take into consideration drainage impacts to pedestrian facilities, utilities, driveways, retaining walls walls, and concrete traffic barriers. 11. If applicable, prepare Hydraulic Data Sheets for any bridge or cross drainage structures at outfall channel. (Indicate channel.(Indicate site location such as name of creeks and stations) 12. Develop plans for all temporary drainage facilities necessary to allow staged construction of the project and to conform with the phasing of adjacent construction projects without significant impact to the hydraulic capacity of the area. • , □ Prepare design layouts, drainage area maps, and design of all drainage components. The Engineer shall design all conventional storm drainage and cross drainage in conformance with El Paso County design guidelines. • □ Storm drain design will be performed using WinStorm or GEOPAK Drainage. Cross drainage design will be performed using WINSTORM, HY 8 or HEC RAS •  Three copies of the bound Drainage Study report.