for Highway Construction Page 478 of 71 5 SECTION 604 – IRRIGATION PIPELINES
604.01 Description.
Provide and install irrigation pipelines.
604.02 Materials.
Provide materials as specified in 601. Provide pipe j oints that are leak -resistant with a maximum working pressure of 10 psi as specified in 601.02. Provide size No. 1, 2a, or 2b coarse aggregate for concrete as specified in 703.02 and ¾ inch minus aggregate for untreated base as specified in 703.04.
604.03 Construction Requirements.
Install pipe as specified in 601.03.
604.04 Method of Measurement.
The Engineer will measure acceptably completed work by the foot along pipe centerline. The Engineer wi ll allow an additional 1 foot for each connecting band used in making an authorized extension of existing corrugated metal pipe.
604.05 Basis of Payment .
The Department will pay for accepted quantities as follows: Pay Item Pay Unit __ Irrigation Pipe .................................................................................... FT Structure excavation, compacting backfill, trench zone backfill, and pipe bedding zone material are incidental and included in the irrigation pipe contract unit price. for Highway Construction Page 479 of 71 5 SECTION 605 – SEWERS, STORM SEWERS, MANHOLE, VALVE COVERS, AND DRYWELLS
605.01 Description.
Construct sewers and storm sewers with manholes, catch basins, inlets , drywells, connections, and other appurtenances. Adjust and repair manhole and valve covers.
605.02 Materials.
Provide materials as specified i n: Concrete ....................................................................................................................................... 502 Pipes, General .............................................................................................................................. 601 Portland cement ........................................................................................................................... 701 Aggregates .................................................................................................................................. . 703 Grout and Mortar ......................................................................................................................... 705 Pipes ........................................................................................................................................... 706 Metals .......................................................................................................................................... 708 Concrete Curing Com pounds and Admixtures ............................................................................. 709 Geotextiles .................................................................................................................................... 718 Use corrugated PE pipe only for storm sewers as specified in 706.16 and with the following additions:
1.Use Type S pipe .
2.Do not subject a pipeline with couplings to pressure flow. Provide size No. 1, 2a, or 2b coarse aggregate for concrete as specified in 703.02 and ¾ inch minus aggregate for untreated base as specified in 703.04. Provide size No. 4 or 5 coarse aggregate for concrete as specified in 703.02 for drywell drain rock .
605.03 Construction Requirements.
Use only precast concrete manufacturers that hold current certification under the NPCA Plant Certification Program, the PCAA Plan t Certification Program, the ACPA QCast Plant Certifications Program, or the PCI Plant Certification Program.
A.Sewers and Storm Sewers. The Contractor may tunnel or jack to cr oss under cross walks, house drives, or service pipes. Excavate and compact backfill as specified in 210. Lay concrete pipe for sanitary sewer lines beginning at t he lower (downstream) end with the receiving end upstream and with ends fully joined using suitable means to prevent air circulation within the pipeline. Install rubber -gasketed joints as specified in 601.03. Install and test pipes as specif ied in 601.03.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 514–514 of 768.