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SUBSTANTIATING MATERIALS accessibility of construction sites, right-of-way requirements, avail- ability of construction materials, and other pertinent factors. CanaJ. and lateraJ. designs were based on earth lining in all sections where seepage from these struotures would affeot the irrigable lands. Pre- cast concrete pipe was used for siphons. Standard types of canaJ. struc- tures were provided where needed. Concrete pipe culverts were used for bridge orossings. A 3-year oonstruotion period would be advisable. King Consolidated Diversion Works The existing wood and oonorete structure would be replaoed with a permanent concrete and steel structure of adequate capacity. The new struoture would be located on the same site as the existing works and would be construoted to handle only a portion of the river flow. The diversion works would include a oonorete ogee spillway 40 feet long, a oanaJ. headworke 10 feet wide and 62 feet long oontrolled by 8- by 10- foot radiaJ. gates. A fish soreen would be provided at the headworks. ~ng Consolidated Canal Enlargement The existing King Consolidated Canal would be enlarged from the diversion works on the Pine River, near Bayf'ield, Colo., to the tUrnout for the Ridge Canal. The capao:l.ty would be inoreased trom about 95 to 165 Second-feet. The enlarged portion of the oanal would be approx- imate~ 11.5 miles long and wouJ,d consist of 6 miles of unlined earth section, 5 miles of earth lined section, 0.13 mile of siphons, 0.18 mile of concrete benoh flUllle, and 0.15 mile of free-flow conorete pipe. The canaJ. seotion would be in materiaJ. ranging from the heavy clay soils derived from shales to raw shales and in some cases solid sandstone. Ridge Canal The Ridge Canal would convey water from the turnout at the end of the enlarged portion of the King Consolidated Canal to proJeot lands extending southward. The oanal would be 22.7 miles long and would oon- sist of 7.9 miles of unlined earth seotion, 12.6 miles of' earth-lined sect;1on, 1.5 miles 01' siphons, and 0.7 mile of chutes and drops. The oa.pa.oity ot the canal would vary trom 55 to 5 seoond-feet. The oanal would be in overlying heavy clay soils and the under~ing shales. As much of the canal is locatild on ridges, the shaJ.e is either exposed or at shallow depths. ..- Salt Creek Lateral. The Salt Creek lateraJ. would extend westward from a turnout at mile 7.1 of the Ridge Canal to projeot lands in the SaJ.t Creek drainage area. The lateral would be about 11.9 miles long and WOl.ld have a capacity ranging trom 15 to 5 second-feet. It would consist of 7.4 miles of unlined earth seotion and 4.5 miles of earth-lined canal. 7