Design and Construction Standards - Tualatin Valley Water District
Design and Construction Standards - Tualatin Valley Water District
Design and Construction Standards - Tualatin Valley Water District
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Water</strong> System <strong>Design</strong> <strong>and</strong> <strong>Construction</strong> St<strong>and</strong>ardsTable of Contents2.5 Shoring, Sheeting, <strong>and</strong> Bracing of Trenches ............................................................................... 2-22.6 Location of Excavated Materials .................................................................................................. 2-22.7 Removal of <strong>Water</strong> .......................................................................................................................... 2-32.8 Addition <strong>and</strong> Compaction of Backfill ............................................................................................ 2-3a. Bedding <strong>and</strong> Pipe Zone ............................................................................................................... 2-3b. Class A Backfill ............................................................................................................................ 2-3c. Class B Backfill ............................................................................................................................ 2-3g. Settlement ................................................................................................................................... 2-42.9 Compaction Testing ...................................................................................................................... 2-42.10 General Surface Restoration Specifications ............................................................................... 2-4a. Asphalt Concrete <strong>and</strong> Portl<strong>and</strong> Cement Concrete Paving ........................................................ 2-4b. Protection of Structures .............................................................................................................. 2-5c. Warranty Period ........................................................................................................................... 2-53. <strong>Water</strong> Mains3.1 <strong>Design</strong> ............................................................................................................................................ 3-1b. Pipe Sizes ..................................................................................................................................... 3-1c. Location of Mains ........................................................................................................................ 3-1d. Dead End Mains .......................................................................................................................... 3-1f. Pipe Alignment ............................................................................................................................. 3-2g. Restrained Joints ......................................................................................................................... 3-2h. Casing Pipe, Spacers, <strong>and</strong> Seals ................................................................................................ 3-3i. Cathodic Protection ..................................................................................................................... 3-33.2 Materials ........................................................................................................................................ 3-3c. Restrained Joint Ductile Iron Pipe .............................................................................................. 3-3d. Ductile Iron Fittings ..................................................................................................................... 3-4e. Mechanical Joint Fittings <strong>and</strong> Restraints ................................................................................... 3-4f. Flanged Fittings ........................................................................................................................... 3-5g. Gaskets ........................................................................................................................................ 3-5h. Restrained Joints ......................................................................................................................... 3-5i. Sleeves <strong>and</strong> Mechanical Couplings ............................................................................................ 3-5j. Tapping Sleeves .......................................................................................................................... 3-6k. Casing Pipe, Spacers, <strong>and</strong> Seals ................................................................................................ 3-63.3 <strong>Construction</strong> .................................................................................................................................. 3-7a. Cutting the Pipe ........................................................................................................................... 3-7b. Laying the Pipe………………………………………………………………………………………………………………3-7c. Tapping Sleeves .......................................................................................................................... 3-9d. Thrust Blocks…………………………………………………………………………………………………………………3-9e. Straddle Blocks……………………………………………………………………………………………………………..3-93.4 Hydrostatic Testing, Flushing, <strong>and</strong> Disinfection ........................................................................ 3-10a. Hydrostatic Test .........................................................................................................................3-10TVWD <strong>Water</strong> System St<strong>and</strong>ards June 2012 Page ii
Change language