Horizontal Directional Drilling HDD Arvid Veidmark III EVP

Horizontal Directional Drilling (HDD) Arvid Veidmark, III EVP, Senior Estimator Specialized Services Company www. sscboring. com

SSC 1969 -2009 SSC was founded in 1969 by the Veidmark family. Current owners include Marcia Veidmark, Arvid III, Aaron, and Abe, who all share in the daily operation of the company. Over the years the business has adapted to specialize solely in trenchless technology and is currently recognized as a leading authority on Arizona’s underground. Watch Video Celebrating 40 Years In Construction!

HDD-A Trenchless Method § Born from the gas industry § First recorded river crossing in 1971 was 500 -ft of 4 -in pipe § Method sophistication has grown significantly § 2008 at least seven crossing recorded with 42 -in diameter in excess of 5, 000 -ft Celebrating 40 Years In Construction!

Record HDD 2009 § May 2008 – Nov 2009 § 10 mile pipeline under § § § harbor in VA. 7 HDD Crossings One 3, 003 -ft water-to-water One 7, 357 -ft under river Total 15, 439 -ft on project HDD only “permitable” option Celebrating 40 Years In Construction!

Expanding Market § Growth largely linked to expansion of natural gas infrastructure § Most projects related to right-of-way work, crossing, permitting or work in environmentally sensitive areas. § Mostly involves installation of 3 -in pipe and up to bolster existing transportation infrastructure. § Can reduce construction time because of easier permitting approval Celebrating 40 Years In Construction!

Applications § Wide range of applications § Typical small installations – telecommunication service cable § Large installations - pipes up to 48 -in § Used to install new pipes with minimal surface disruption Celebrating 40 Years In Construction!

HDD 4 - Stage Process § Planning ü Project requirements ü Function ü Diameter ü Depth ü Length ü Material to be installed § Pilot Hole Drilling-Pre-Reaming § Hole Enlargement § Pull Back Celebrating 40 Years In Construction!

Stage #1 -Planning Plans Specifications Establish Geotech Report Scope of work Schedule Design Location Dimension Product Furnished Product Installed Quality Control Cooperation Celebrating 40 Years In Construction!

Project Requirements Intended Function Diameter Size of Equipment Depth Pipe Material Influence Choices Length Drilling Methods Pipe material Other Aspects Bend radius Schedule Celebrating 40 Years In Construction!

Function INFLUENCE pipe material choices diameter necessity of tight grade tolerances (e. g. , gravity fed sewer) Celebrating 40 Years In Construction!

Diameter Photos Courtesy of Vermeer 2009 Celebrating 40 Years In Construction!

Diameter Rule of thumb - the final diameter should be 50% larger than pipe to be installed. Celebrating 40 Years In Construction!

Depth INFLUENCED BY ground conditions site features existing utilities constraints environmental concerns Celebrating 40 Years In Construction!

Subsurface Utility Engineering § Eliminates Risk Associated With: ü Redesign costs ü Higher construction bids Combines Traditional ü Change orders Practices… ü Construction Claims gy o l ü Environmental damage o hn ith w Ne c Te W Celebrating 40 Years In Construction!

Cost Benefits of S. U. E. § Reduced facility damage § Eliminated cost of redesign § Increased job safety § Reduced utility relocations For each $1. 00 spent on the use of subsurface utility engineering services on street and highway projects, the overall project experienced a savings of $4. 62. § Lower project bids § Improved contractor productivity According to Purdue University / Federal Highway Administration study completed in 2000 Celebrating 40 Years In Construction!

Stage #2 -Pilot Hole Drilling § The pilot hole is drilled from the entry point following the profile and alignment previously designed. § Drilling equipment used is based on the results geotechnical investigations. § Drill path should have as fewest bends as possible § The drill head is tracked at the surface via a drill locater Celebrating 40 Years In Construction!

Stage #3 Pre-Reaming § Provides an annular space large enough for new pipeline § May include one or more stages (dependant on diameter/soil condition) Pull-back pipe Washover pipe Pre-reamer Celebrating 40 Years In Construction!

Stage #4 Pull Back § Pipeline should be preassembled § Consider drill’s exit angle § Consider duration of complete pull back (including welding & fusing) § Installation should be made with minimal stops Pull-back pipe Product pipe Swivel joint Reamer Celebrating 40 Years In Construction!

HDD Video Celebrating 40 Years In Construction!

HDD Case Study Superstition Freeway (US 60) Val Vista to Power Road 4” PVC for SRP electric conduit 4 directional bores and pull under ramps GC-FNF Construction Celebrating 40 Years In Construction!

Celebrating 40 Years In Construction!

Celebrating 40 Years In Construction!

Celebrating 40 Years In Construction!

Celebrating 40 Years In Construction!

Celebrating 40 Years In Construction!

Gila River – 16” Water main Celebrating 40 Years In Construction!

HDD/Auger Comparative Estimate PROJECT Gila River Indian Community -Department of Public Works Nelson Road and 1 -10 Waterline Crossing REQUIREMENTS 16” C 905 PVC Water Main 416 lineal feet Cross I-10 right-of-way ADOT 10’ + depth requirement Traffic limitations Sacaton, Arizona Celebrating 40 Years In Construction!

Location of Installation Celebrating 40 Years In Construction!

HDD/Auger Estimate Comparison HDD Auger Bore Footage 600’ Conduit 24” # Conduits 1 Footage 400’ Casing 36’ x. 500 Spacer Size 16”x 36” # Spacers 80 Celebrating 40 Years In Construction!

HDD Option Grade I-10 Eastbound I-10 Westbound Grade 36” Casing Celebrating 40 Years In Construction!

Auger Option Celebrating 40 Years In Construction!

Labor and Materials HDD Auger Bore 3 man crew = 15 days 3 man crew = 30 days Other Materials bore mud primer/glue permits traffic control Other Materials grout welding supply chip shore boxes Celebrating 40 Years In Construction!

Cost Comparison HDD Auger Bore Labor and equipment per foot = $98 Material cost per foot =$117 600 -ft Labor and equipment per foot = $257 Material cost per foot =$190. 18 420 -ft $129, 000 Celebrating 40 Years In Construction! $190, 000

Questions? Celebrating 40 Years In Construction!

Discussion Arvid Veidmark, III SSC Consultant, Sr. Estimator arvid@sscboring. com 602 -997 -6164 www. sscboring. com Celebrating 40 Years In Construction!