City of Frisco Engineering Standards

Engineering Standards
4.08 Design of Enclosed Storm Sewer System ............................................................... 4-19
4.09 Detention/Retention Facility Design ....................................................................... 4-25
4.10 Miscellaneous Drainage Requirements ................................................................... 4-28
4.11 Open Channel Design .............................................................................................. 4-29
4.12 Hydraulic Design of Culverts .................................................................................. 4-34
4.13 Bridge Design Hydraulics ....................................................................................... 4-35
4.14 Energy Dissipators .................................................................................................. 4-35
4.15 Floodplain Alterations ............................................................................................. 4-36
4.16 Erosion and Sedimentation Control ........................................................................ 4-38
4.17 Drainage Easements ................................................................................................ 4-38
4.18 Sustainable Development ........................................................................................ 4-38
SECTION 5 UTILITY DESIGN REQUIREMENTS 5-1
5.1 Water System-General .............................................................................................. 5-2
5.1.1 Water Main Location................................................................................................. 5-2
5.1.2 Horizontal and Vertical Alignment ........................................................................... 5-2
5.1.3 Separation Distance between Water and Wastewater ............................................... 5-3
5.1.4 Average Daily Water Demands ................................................................................. 5-3
5.1.5 Water Main Sizing .................................................................................................... 5-4
5.1.6 Water Main Materials ................................................................................................ 5-4
5.1.7 Water Services ........................................................................................................... 5-5
5.1.8 Valves ........................................................................................................................ 5-5
5.1.9 Fire Hydrants ............................................................................................................. 5-6
5.1.10 Connections to Existing Water Mains ....................................................................... 5-7
5.1.11 Backflow Prevention ................................................................................................. 5-8
5.1.12 Automatic Flushing Valve......................................................................................... 5-8
5.2 Wastewater System-General ..................................................................................... 5-9
5.2.1 Wastewater Main Location ....................................................................................... 5-9
5.2.2 Horizontal and Vertical Alignment ........................................................................... 5-9
5.2.3 Separation Distance between Wastewater and Water Mains .................................. 5-10
5.2.4 Wastewater Flows ................................................................................................... 5-11
5.2.5 Wastewater Main Sizing ......................................................................................... 5-11
5.2.6 Wastewater Main Materials ..................................................................................... 5-12
5.2.7 Wastewater Service Laterals ................................................................................... 5-12
5.2.8 Manholes and Cleanouts ......................................................................................... 5-13
5.2.9 Inverted Siphons ...................................................................................................... 5-14
5.2.10 Wastewater Lift Stations ......................................................................................... 5-14
5.2.11 Force Mains ............................................................................................................. 5-15
5.2.12 Dumpster Enclosure Drains ..................................................................................... 5-15
5.3 Reclaimed Water System-General .......................................................................... 5-16
5.3.1 Reclaimed Water Main Location ............................................................................ 5-16
5.3.2 Horizontal and Vertical Alignment ......................................................................... 5-16
5.3.3 Separation Distance between Reclaimed Water and Other Systems ....................... 5-16
5.3.4 Reclaimed Water System Materials ........................................................................ 5-16
5.4 Easements ................................................................................................................ 5-17
5.5 Thrust Restraint ....................................................................................................... 5-17
5.6 Pavement Cut and Repair ........................................................................................ 5-18
5.7 Trenchless Construction .......................................................................................... 5-18
5.8 Crossings ................................................................................................................. 5-19
5.9 Corrosion Protection................................................................................................ 5-20
Table of Contents
TC-2