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North American Society for Trenchless Technology (NAST7) NASTT's 2017 No -Dig Show Washington. D.C. April 9-12, 2017 MM -T2-04 Record Setting Dual Casing Crosses Indian River by HDD Jim Williams, P1 Mears (irony, Houston, TX Mike Muelkr, P1?, Pours Engineers, Sr. f ouis. MO Ron Haldeman, PE. pears Group, H0124100, TX Tom Nanta Underground Solonms. Poway, CA Sara Maloney. Underground Saharans, Poway, CA BKS RACT 111 The Indian Riser trolling project was one portion of a I3.65•milc alrfmned lin new, redirattam 230 kV tmdert7nuM ekcutc transmission hoes. Mulhpk installation methods were required throughout Ibc projcck including open net trench raasstion. dere miermunnels, and fuse separate hors)Antal directional drills. Of the installations, the mop significant and technically challenging nem the record breaking dual 7,020.foos Indian Riser casing 00.9iinp installed using horirmtal directional drilling, The casing for this hnslalbnon needed to he noo-conduetne, safe, and economical. Installation had to be as mimrnally dismptise m possible as the gripe would be aerially navigated through 900 -feet of gummed mangrove and floated a,500 fen through a lagoon. The casing used was 32 -inch DR21 fusible n 4cMoe de pipe inserted ileo a 46inch rearmed bore !role, completed using imams -et drilling by o 1,100,000 pound capacity I11)D rig and a ,nulkr 140.000 pound ng, The ehalknges of the assembly, handling, and inatallstion of die two 383 toe casings, the full scale testing of the 30 - inch in',emal diomna rut itys. and the one to measurement of drag form to email intermediate fusion tenpin. arc discussed. 2. INTRODUCTION The unstable nature 01 mere meths runs comers to the need 10 increase Ow 0sblhty of the national power tgrply. In arras that regularly face severe wea•JKr, such a, hurricanes, tornados, and oanlgwkes. maintaining access to e steady source Of power Is intperatisc. A lack of ties -mirky can hamper relief and recovery cfforn while tapered clowned liner can be an additional suoee of danger, By increasing sedund*ney in then delivery burs, power companies are able to provide improved smioe lo their customers in an increased number of ps lootlalty dangerous siluatio•,R. An area that Is particularly susceptible to severe wanks is the peninsular state of Florida. Both coags ate regularly 'armed by '$unmoor mason" and can suffer significant damage to both public and prime propeny each time severe weather systems pus through. elm damage may nem from high winds. floodin. o combination of the Iwo. Paper UM -T2-04 . 1 Record Setting Dual Casing Crosses Indian River by HDD Dual Bores 7,020 Feet Under IRL 46 inch Bore Hole 32 inch DR21 FPVC pipe 900 feet protected Mangrove 2016 Trenchless Tech New Install Project of the Year