Common use of Storm Drains Clause in Contracts

Storm Drains. The Engineer shall provide the following services: 1. Design and analyze storm drains using software as approved by the Owner. 2. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT Hydraulic Design Manual, and any specific guidance provided by the Owner. Storm drain design software shall be selected as directed by the task order. 3. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. Calculate manhole head-losses. Compute manhole head losses as per FHWA’s HEC-22. 5. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner any proposed changes to the detention systems. 6. Identify areas requiring trench protection, excavation, shoring, and de-watering.

Storm Drains. The Engineer shall provide the following services: 1. Design and analyze storm drains using software as approved by the OwnerState. 2. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT State’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerState. Storm drain design software shall be selected as directed by the task orderWork Authorization. 3. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. Calculate manhole head-head losses. Compute manhole head losses as per FHWA’s HEC-22. 5. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line gradeline throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. 6. Identify areas requiring trench protection, excavation, shoring, and de-de- watering.

Storm Drains. The Engineer shall provide the following services: 1. a. Design and analyze storm drains using software as approved by the OwnerState. 2. b. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT State’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerState. Storm drain design software shall be selected as directed by the task orderWork Authorization. 3. c. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. d. Calculate manhole head-lossesheadlosses. Compute manhole head losses as per FHWA’s HEC-22. 5. e. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When DocuSign Envelope ID: 81458207-9CCE-4B63-AE14-3C13B2D84757 oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line gradeline throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. 6. f. Prepare conceptual 1% AEP sheet flow analysis for the project utilizing existing and proposed conditions if required in the Work Authorization. g. Identify areas requiring trench protection, excavation, shoring, and de-watering.

Storm Drains. The Engineer shall provide the following services: 1. Design and analyze storm drains using software as approved by the OwnerState. 2. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT State’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerState. Storm drain design software shall be selected as directed by the task orderWork Authorization. 3. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system.. DocuSign Envelope ID: 923E8011-1E2D-416E-8D69-5FFD494D36B6 4. Calculate manhole head-lossesheadlosses. Compute manhole head losses as per FHWA’s HEC-22. 5. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line gradeline throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. 6. Identify areas requiring trench protection, excavation, shoring, and de-watering.

Storm Drains. The Engineer shall provide the following services: 1. a. Design and analyze storm drains using software as approved by the OwnerState. 2. b. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT State’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerState. Storm drain design software shall be selected as directed by the task orderWork Authorization. 3. c. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. d. Calculate manhole head-lossesheadlosses. Compute manhole head losses as per FHWA’s HEC-22. 5. e. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When DocuSign Envelope ID: E6BC4953-CD40-42B4-8A24-1AF55737BB1F oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line gradeline throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. 6. f. Prepare conceptual 1% AEP sheet flow analysis for the project utilizing existing and proposed conditions if required in the Work Authorization. g. Identify areas requiring trench protection, excavation, shoring, and de-watering.

Storm Drains. The Engineer shall provide the following services: 1. Design and analyze storm drains using software as approved by the OwnerFBPTRA. 2. Size inlets, laterals, trunk line and outfall. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT TxDOT’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerFBPTRA. Storm drain design software shall be selected as directed by the task orderWork Authorization. 3. Determine hydraulic grade line starting at the outfall channel for each storm drain design. Use the design water surface elevation of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. Calculate manhole head-head losses. Compute manhole head losses as per FHWA’s HEC-22. 5. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line gradeline throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner FBPTRA any proposed changes to the detention systems. The FBPTRA will assess the effects of such changes on the comprehensive drainage studies. 6. Identify areas requiring trench protection, excavation, shoring, and de-de- watering.

Storm Drains. The Engineer shall provide the following services: 1. Design and analyze storm drains using EPA SWMM and GeoPak Drainage software as approved by the OwnerState. 2. Size and place inlets, laterals, trunk line lines and outfalloutfalls. Develop designs that minimize the interference with the passage of traffic or incur damage to the highway and local property in accordance with local drainage ordinances, the TxDOT State’s Hydraulic Design Manual, District criteria and any specific guidance provided by the OwnerState. Storm drain The Engineer shall meet with the State and City of San Marcos prior to designing storm drains to ensure the design software shall be selected will have minimal impacts on the ultimate improvements to the roadway as directed by described in the task orderfinal ▇▇▇▇ County Implementation Plan and is in accordance with the City’s planned improvements. 3. Determine hydraulic grade line (HGL) starting at the outfall channel for each storm drain design. Use the design water surface elevation WSEL of the outfall as the starting basis (tailwater) for the design of the proposed storm sewer system. 4. Calculate manhole head-head losses. Compute manhole head losses as per FHWA’s Hydraulic Engineering Circular-22 (HEC-22). 5. Limit discharge into existing storm drains and existing outfalls to the capacity of the existing system, which will be determined by the Engineer. Evaluate alternate flow routes or detention, if necessary, to relieve system overload. Determine the amount of the total detention storage to control storm drain runoff for the design frequency based on hydrograph routing for the full range of frequencies (50%, 20% 10%, 4%, 2%, 1%, and 0.2% AEP), as well as a rough estimate of the available on-site volume. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic grade-line HGL throughout the whole system, within project limits, for the design frequency or frequencies. The Engineer shall coordinate with the Owner State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. 6. Identify areas requiring trench protection, excavation, shoring, and de-de- watering.