Arizona 13 2016

By Lori LovelyCEG CORRESPONDENT

A 29-mi. (46.7 km) stretch ofInterstate 15 through Arizona is aheavily-traveled commercial routebetween Nevada and Utah — aneconomic corridor effectively link-ing southern California with theRocky Mountain region that seesmore than 1.4 million commercialtrucks each year.When this section of highway

was built, it was the most expen-sive interstate freeway ever built,per mile. Completed in 1973 aftera decade of construction, it sees anaverage of 24,000 vehicles per day.It has been hailed as the most

scenic highway in the state, tra-versing the northwest corner justsouth of the Utah state line as itwinds along the Virgin River, atributary of the Colorado River.This picturesque pass through theVirgin River Gorge begins at “TheNarrows,” with its limestone cliffstowering 500 ft. (152.4 m) abovethe highway. Along this passagethat climbs northbound, five

bridges cross the river. Arizona Department of

Transportation has been upgradingthese structures after a study theyand the Federal HighwayAdministration conducted identi-

fying potential improvements to orrepairs of mainline bridgesthroughout the corridor.Operational, capacity and safetyimprovements to I-15 for the entirecorridor also will be investigated.

These investigations include possi-ble shoulder improvements, rock-fall containment enhancementsand new climbing lanes.Identified in the study were

bridges 2, 3, 6 and 7. Last year, a

$2.8 million project to rehabilitateseveral southbound bridge surfaceson bridges No. 2, No. 3 and No. 7was completed. A more extensiverehabilitation project on No. 6 wasbegun last year; it includes replac-ing the bridge’s superstructure(girders, deck and railings), as wellas widening the roadway throughthe narrow passage of the scenicVirgin River Gorge.

We’re No. 1Another bridge identified in the

study is currently undergoing a $27million rehabilitation. Bridge No. 1is considered an important elementof I-15, providing a vital linkbetween California, Nevada,Arizona and Utah.“This extensive rehabilitation

project will include the replace-ment of the bridge’s superstructure(girders, deck and railings), as wellas widening the roadway throughthe narrow passage of the scenicVirgin River Gorge,” explainedDustin Krugel, public informationofficer of ADOT Communications.

Scenic Virgin River Site of $27M Bridge Rehabilitation

ARIZONA STATE EDITION A Supplement to:

®

“The Nation’s Best Read Construction Newspaper… Founded in 1957.”

June 262016

Vol. I • No. 13

Your Arizona Connection – Dennis Hogeboom – 1-877-7CEGLTD – [email protected]

How do you get around, Arizona?Spend a little time sharing what takes

you from place to place and you’ll helpinform how we all get around in the future.The Arizona Department of

Transportation and Federal HighwayAdministration are asking households,most of them outside of metropolitanPhoenix and Tucson, to participate in the

National Household Travel Survey. Up to30,000 Arizona households, chosen at ran-dom, will be contacted by letter over thenext year.It’s important that as many households

as possible participate because the answerswill help state, local and federal officials

How do you get around, Arizona?

ADOT Wants to Know HowYou Get Around the State

see SURVEY page 14

This picturesque pass through the Virgin River Gorge begins at “The Narrows,” with its limestonecliffs towering 500 ft. (152.4 m) above the highway.

Arizona DOT photo

see BRIDGE page 6

Page 2 • June 26, 2016 • www.constructionequipmentguide.com • Arizona State Supplement • Construction Equipment Guide

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Phoenix, AZ 85040

(602) 437-0351

6975 N Camino Martin

Tucson, AZ 85741

(520) 579-0261

PDI Converts Overhead Power Lines to UndergroundBy Allison McNealSPECIAL TO CEG

Millions of miles of overhead utilities arestrung across the United States, but the relia-bility of overhead utility lines as well asincreasing maintenance and operating costshave led more municipalities, particularly inurban areas, to convert their overhead distri-bution lines to underground.According to the Edison Electric Institute,

almost 70 percent of the nation’s electric dis-tribution system is built with overheadpower lines; however, in the last 15 years,approximately half the capital expendituresby U.S. investor-owned utilities have beenfor underground wires.In addition, there are many communities,

such as the city of Mesa, Ariz., that are con-verting overhead utilities to underground toimprove the aesthetics of their neighbor-hoods and roadways.

Going UndergroundLast summer, a local utility company

hired PDI Construction — a division ofParamount Designs Inc. based out ofPhoenix, Ariz. — to remove the existing 12kilovolt (kV) overhead lines and buryapproximately 5,000 linear ft. (1,524 m) of

new 12 kV power lines as part of an aesthet-ics project.PDI Construction is a full-service dry util-

ity company that has extensive experienceworking in a variety of underground con-

struction services. The company specializesin both horizontal directional drilling (HDD)and open-cut excavating/trenching.However, project manager Noel May chosethe open-cut trenching method for this par-

ticular project. May knew he needed amachine that would complete the project inan efficient manner, so he selected aDX140LCR-3 reduced-tail-swing crawlerexcavator, which PDI Construction previ-ously purchased from the local Doosanequipment dealer — Ditch Witch ofArizona.“Instead of using a tractor loader backhoe

to install the conduit and cables, we used aDX140LCR-3 because of its reducedmachine width, 19-foot dig depth and addedmaneuverability, helping our operators workin tight quarters,” May said. “We needed amachine that could safely turn 360 degreesand load material into a haul truck withoutinterfering with oncoming traffic in adjacentlanes.”The tail-swing radius on the DX140LCR-

3 is just 5 ft. (1.5 m), with a tail swing over-hang of 9 in. (23 cm) over the side of themachine, which made it ideal for working infront of Dobson High School, which is aheavily congested area along WestGuadalupe Road.In addition, May’s operators needed a

machine with good front and side visibility, aswell as to efficiently see behind the machinewhen trenching. The machine’s selectable

see PDI page 7

May selected a DX140LCR-3 reduced-tail-swing crawler excavator for the project,which PDI Construction previously purchased from the local Doosan equipmentdealer — Ditch Witch of Arizona.

Construction Equipment Guide • Arizona State Supplement • www.constructionequipmentguide.com • June 26, 2016 • Page 3


Empire’s Eloy Sales Center Helps Firms See Strong ROIAlong I-10 between Phoenix and Tucson

is a place that looks like an invasion is beingmounted with troops of heavy equipment.Of course, that’s not what’s really going onthere, but the sight of 45 acres of equipmentresiding on 150 acres is, nonetheless, atten-tion-getting.

This place is Empire’s Eloy Sales Centerin Eloy, Ariz. Empire, a top ranked Cat deal-er, provides clients with easy access to —and first pick of — many brands of qualitynew and pre-owned equipment.

Clients can buy, sell, rent, trade or consigntheir equipment through Empire as well ashave access to product and support special-ists for every step of the process.

“Empire’s used equipment services aredesigned to help contractors realize the bestpossible return on investment from theirequipment and each service can be tailoredto fit individual business needs,” said DavidMullaney, director of sales.

The Eloy Sales Center offers an extensiveselection of used equipment for contractorsand dealers in the Southwest region andacross the globe.

“We purchase everything from singleunits to entire used equipment fleets from allaround the world,” said Randy Arrington,used equipment merchandise manager. “Ourrange of used equipment inventory featuresa wide variety of models and hours thatensure the highest level of quality anddependability.”

According to Arrington, every item inEmpire’s complete inventory of used prod-ucts for sale receives a thorough inspectionwith the latest technology to ensure there are

no mechanical or hydraulic defects. In addi-tion, detailed inspection reports are providedto assure that the company’s inventory meetsthe high standards. Also, Arrington, said, “Ifyou can’t find the machine you’re lookingfor, we’ll tap into our extensive used equip-ment network and find it for you quickly.”

Empire’s certified technicians work toensure that all equipment is as job-ready asthe day it came off the manufacturing line.

“When you purchase used equipment

Clients can buy, sell, rent, trade or consign their equipment through Empire as wellas have access to product and support specialists for every step of the process.

Eloy Sales Center also offers operator training and gives customers the chance todemo any machine before they make a purchase.

The Eloy Sales Center offers an extensive selection of used equipment for contrac-tors and dealers in the Southwest region and across the globe.

Empire also offers equipment appraisals and consignments.

see ELOY page 12


2240 W. Buckeye Rd. • Phoenix, AZ 85009602-761-2525 • Fax: 602-454-8899

www.flaskajcb.com


Contractor Uses ‘4-1-4-5’ Scheduleto Accommodate Crew Members

“While the bridge is still consid-ered safe for travel, it requiresextensive refurbishment to contin-ue serving the substantial volumeof traffic along the I-15 corridor.”Funded through state and feder-

al highway funds and a $21.6 mil-lion federal grant in the fourthround of the U.S. Department ofTransportation’s TransportationInvestment Generating EconomicRecovery (TIGER IV) grant pro-

gram after the states of Nevada andUtah lent their support, the projectcommenced in spring 2014 and isanticipated to be completed bysummer 2016.

No Work AroundWhen the project began in

spring 2014, I-15 was narrowed toone lane through the work zonebecause alternate routes are limiteddue to the remote location of the I-15 Virgin River Gorge corridor. In

order to accommodate drivers andreduce traffic delays as much aspossible, crews are working amodified, rotational 40-hour-weekschedule that encompasses typicalhours Wednesday throughSaturday, off Sunday, thenMonday through Thursday, withFriday through Tuesday off. “A ‘4-1-4-5,’ as we call it,”

Krugel said.This work schedule was modi-

fied to better accommodate mostof the team members involved,who are mostly comprised of out-of-town residents, he continues. “By moving to this schedule, it

allowed personnel, who live as faraway as Tucson, Phoenix andFlagstaff, to travel and have a nor-mal weekend.”It’s an inspired schedule to

accommodate the average dailypersonnel count of 60 (althoughthat number swells to greater than90 during milestone events, such asa concrete deck pour), whichincludes all craft, supervisory(ADOT and contractor), ADOTmaintenance, Department of PublicSafety, quality control, qualityassurance, environmentalist, cleri-cal and subcontractor personnel. Those subcontractors include:

Arizona DOT photoLast year, a $2.8 million project to rehabilitate several southbound bridge surfaces on bridges No.2, No. 3 and No. 7 was completed.

Arizona DOT photoThis project is one of ADOT’s first “Construction Manager at Risk”projects. The alternative delivery method was used to process theenvironmental clearances alongside the design. see BRIDGE page 10

Arizona DOT photoOne of the more difficult aspects of the project was installing steelgirders.

Arizona DOT photoBecause the elevation drop from top to bottom is roughly 100 ft.(30.5 m), a steep construction road was installed.

BRIDGE from page 1


|empirecat.com/eloy empirecat.com/eloy | 520-582-2900 520-582-2900

Over, Under: Phoenix FirmBuries Utility Lines in Mesa

power and work modes also were beneficial,allowing operators to gain maximum efficien-cy and fuel economy at the job site.

Right-Size AttachmentsSome excavator operators gravitate

toward using a standard size bucket forapplications, but this may negatively impactproductivity. During the project, theDX140LCR-3 was paired with a 30- or 48-in. (76 or 122 cm) heavy-duty bucket to eas-ily dig through a variety of soil conditionslike clay and hardpan. May added teeth tothe buckets to deflect the amount of bucketwear, helping the crew get more work done.In addition, the excavator was equipped withan optional quick coupler, which helpedexpand PDI Construction’s attachment ver-satility on the job site.“The quick coupler made it easier and

faster for our operators to change bucketswithout exiting the cab,” May said.

Open-Cut TrenchingFor the overhead-to-underground project,

deciding between horizontal directionaldrilling and the open-cut trenching methodprimarily depended on the job site and soilconditions. At times, horizontal directionaldrilling can be the only option available tobest navigate the underground congestion ofcables, lines and pipes, according to May.However, for this particular project the open-cut trenching method was the best suited forthe job.PDI Construction officials worked with

local authorities to identify underground util-ities before the Doosan excavator started

digging. To make sure no utility lines werehit using the open-cut trenching method, thecrew paralleled within 4 ft. (1.2 m) of waterand gas lines and would check crossingsevery 20 to 50 ft. (6 to 15 m).

Building a Duct BankAfter excavating the trench, the crew built

a duct bank to help protect and consolidatethe cables. Most duct banks use a protectiveconcrete casing that surrounds the PVC con-duits. For this project, the electrical cableswere bundled together in a 2.5-in. (6.4 cm)and 3-in. (7.6 cm) PVC conduit using guidewires inside the bank. PVC allows for easierrepairs on existing duct banks and requireminimal digging. After the conduits werebundled, they were surrounded with anencasement, which is designed to preventdamage from water or physical stress. “We put a clevis — a U-shaped or forked

metal connector that can be fastened by abolt or pin — on our DX140LCR-3 andplaced the 200-foot conduit duct bank intothe trench,” May said. Once the conduit duct bank was installed,

the DX140LCR-3 was used to backfill thetrench. According to May, the project wentsmoothly and was completed in only a fewmonths mainly due to the DX140LCR-3excavator’s power and performance on thejob site. For more information, visit

www.DoosanEquipment.com.Allison McNeal is a technical writer with

Two Rivers Marketing.(This story also can be found on

Construction Equipment Guide’s website atwww.constructionequipmentguide.com.)

The tail-swing radius on the DX140LCR-3 is just 5 ft. (1.5 m), with a tail swing over-hang of 9 in. (23 cm) over the side of the machine, which made it ideal for workingin front of Dobson High School, which is a heavily congested area along WestGuadalupe Road.

PDI from page 2


Steel Gate Replaces Inflatable Dam at Tempe Town LakeBy Chuck HarveyCEG CORRESPONDENT

Tempe Town Lake, a 220-acreurban lake in Tempe, Ariz., has anew dam.An inflatable rubber dam at the

west end of the lake has beenremoved. The new dam systemfeatures a hydraulically-operatedsteel gate system. Cost of the proj-ect, including removal of the rub-ber dam, is set at about $47 mil-lion. The lake, with its new dam, was

dedicated by the mayor in a cere-mony on May 14.The new dam is the largest

hydraulically-operated steel gatedam system in the nation. Tempeofficials describe the new dam as areliable and cost-effective solutionthat is expected to last for decades.The replacement project began

Feb. 10, with pumping water outof the lake. Water from the lakewas moved to a new Salt RiverProject canal system. From there itwas used for irrigation of trees,parks and lawns. Tempe Town Lake was drained

of about 750 million gal. (2.8 bil-

lion L) of water. The process tookabout three weeks. The pump sys-tem consisted of four 12-ft. (3.7 m)pipes that removed between 25and 50 cu. ft. (19 and 38 cu m) ofwater per second. Once the lake was drained and

the new dam ready to operate, thelake was refilled with water fromthe Central Arizona Project.The lake was closed for water

activities, but areas around the lakeincluding the pedestrian bridgeand parks remained open.No dirt had to be brought in to

complete the project. However dirtdid have to be moved in order toinstall the new dam.Workers poured about 47,000

cu. yds. (35,934 cu m) of concretefor the replacement dam. Theyalso installed 6,000 ft. (1,829 m) offiber optic cable for the dam oper-ating system. The job required useof two 200-ton (181.4 t) cranes andseveral excavators suited for deepdigging.Construction of a new dam was

challenging. Project work includ-ed demolition of existing struc-tures, earthwork, roller compact-

The new dam is the largest hydraulically-operatedsteel gate dam system in the nation.

The replacement project began Feb. 10, with the pumping of waterout of the lake.

Water from the lake was movedto a new Salt River Project canalsystem and was used for irriga-tion of trees, parks and lawns.

The pump system consisted offour 12-ft. (3.7 m) pipes thatremoved between 25 and 50 cu.ft. (19 and 38 cu m) of waterper second.see TEMPE page 14


Public Auction held the 2nd Saturday of every month.Preview Every Monday - Friday 8am - 4pm

Consignments Welcome

Western Sales Management, Inc1616 S 67th Ave.

Phoenix, AZ 85043

623-936-3300wsmauctioneers.com

[email protected]

Next Auction July 9

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Pulice Wadsworth JV Leads Virgin River Gorge WorkAdams Contracting and Excavating, rockscaling and drilling; Arizona HighwaySafety Specialists, guardrail; CaseFoundation Company, drilled shaft founda-tion; Coughlin Company, pavementrotomilling; Gateway Company, steel girder(structural steel) painting; Hoque andAssociates, quality control testing; HowePrecast, precast barrier and temporary trafficcontrol devices; Paradise Rebar, reinforcingsteel installation; Pavement Markings Inc.,pavement markings; Sunroc, asphalt paving;and Yenter Companies, rock fall protectionfence.All personnel are overseen by general

contractor Pulice Wadsworth JV, a joint ven-ture comprising Pulice Construction andWadsworth Brothers Construction.The job requires 4,000 cu. yds. (3,058 cu

m) of structural concrete, 3 million lbs. (1.36million kg) of structural steel, 910,000 lbs.(412,769 kg) of reinforcing steel, 4,000 tons(3,629 t) of earthwork (aggregates) and3,600 tons (3,266 t) of hot mix asphalt.Equipment on site includes two 250-ton

(227 t) lattice boom cranes; a Cat 966 wheelloader; Cat D8 dozer; hydraulic excavators;30-ton (27 t) rock trucks; a Bidwell deckpaving machine; and 12,000-lb. (5,443 kg)forklifts.

Getting ThereBefore men and machinery could be put

in place, they had to get to the job site. Thesection of I-15 in the Virgin River Gorge isan extremely curvy section of freeway,which winds its way from Utah to Nevada inArizona through vertical canyon walls andsolid rock. Along the freeway’s path, thereare seven bridges that span the VirginRiver’s crossing beneath it. “Our reconstruction project is situated

where access and working area are extreme-ly limited,” said Erik Wolf, project managerof Wadsworth Brothers. “An access road hadto be constructed to allow equipment, mate-rials and personnel to travel to the areabeneath the overhead bridge and perform thework.” Because the elevation drop from top to

bottom is roughly 100 ft. (30.5 m), a steepconstruction road was installed.Because the working height of the bridge

is only about 100 ft. above the Virgin Riverbelow, every safety precaution possible wasimplemented on and around the bridge toensure the safety of all, including the travel-ing public, during construction, Wolf added.“Tens of thousands of vehicles per day trav-el this section of freeway.” A larger than nor-mal percentage of this traffic includes heavytrucks. To ease traffic problems, the project

employs multiple full-time traffic control

supervisors; utilizes the assistance of theHighway Patrol; implements temporaryconstruction barriers and devices; andenforces a reduced speed zone through theconstruction zone to ensure safety of bothconstruction personnel and the travelingpublic.

A River Runs Through It Wolf said that reconstructing a bridge and

highway that crosses the highly sensitiveVirgin River has been a very daunting taskfrom the beginning. “Each step of the work had to be coordi-

nated with ADOT, as well as environmentalagencies such as the Bureau of LandManagement, Arizona Game and Fish,Department of Natural Resources,Environmental Protection Agency and oth-ers,” he said.Personnel from these agencies were

involved, both during design and construc-

tion, to ensure that all matters of the workwere performed in harmony with naturebecause the project location is situated in anarea where there are multiple endangeredspecies. Thus, every precaution was imple-mented to ensure the construction activitieswere environmentally compliant.But no one can control the weather, and

this area is known for weather extremeswhere temperatures can range from below30 degrees Fahrenheit in the winter to morethan 115 degrees in the summer. Wind gustspassing through the area have been recordedat more than 70 mph. “Throughout the course of the project, we

have experienced multiple days of severeweather that led to flood water levels risingmultiple feet per hour, wind and rain thatenabled rock to fall from canyon walls over-head, snow, sleet and tortuous heat,” Wolfrecalled. The GC overcame these difficultconditions by providing all personnel with

water and ice, but Wolf credits the determi-nation of each team member and their pas-sion of completing this flagship project asthe driving force. One of the more difficult aspects of the

project was installing steel girders. Installingthem on any bridge is a task that takes coor-dination, patience, a skilled workforce, pre-cision and the necessary equipment, Wolfacknowledged, but if you add in the difficultlogistics of this project, where the workneeds to be conducted from 100 ft. below thefinal placement and around a river, this mon-umental task becomes exponentially morechallenging. “These steel girders, each weighing up to

87,000 pounds, had to be carefully lifted,with two 250-ton lattice boom crawlercranes, and moved into place,” he said. To prepare for placement, a three-dimen-

sional model was constructed of the projectsite and existing conditions prior to perform-ing this task, which then was further expand-ed to detail and diagram a critical lift plan,showing where each crane had to be setupand how each would travel while lifting thesteel girders. “The pre-planning of this work allowed us

to complete this task quickly, efficiently andsafely,” Wolf stated.This project is one of ADOT’s first

“Construction Manager at Risk” projects.The alternative delivery method was used toprocess the environmental clearances along-side the design. Wolf explained that withoutthis approach, the team would not have beenable to utilize the TIGER grant funding thatwas awarded. Work is currently on track for completion

this summer.(This story also can be found on

Construction Equipment Guide’s website atwww.constructionequipmentguide.com.)CEG

BRIDGE from page 6

Arizona DOT photoAll personnel are overseen by general contractor Pulice Wadsworth JV, a joint ven-ture comprising Pulice Construction and Wadsworth Brothers Construction.

Arizona DOT photoReconstructing a bridge and highway that crosses the highly sensi-tive Virgin River has been a very daunting task from the beginning.

Arizona DOT photoEvery precaution was implemented to ensure the con-struction activities were environmentally compliant.



Empire Houses One of Five Cat Regional Sales Centersfrom Empire, you are buying peace ofmind,” Mullaney said. “Peace of mindthat you are part of a network ofskilled team members who can takecare of you and your equipment.”

The Eloy Sales Center also is hometo one of five Caterpillar RegionalSales Centers in the United States.Caterpillar entrusts Empire to house,inspect, service and market usedmachines owned by Cat Financial thathave come off lease, been repos-sessed, or otherwise returned to deal-erships in the West. Empire is respon-sible for consistently assuring thatthese machines are in “ready to work”condition before being marketed toused equipment customers and otherdealers.

Empire also offers equipmentappraisals and consignments.

“Our experienced appraisers under-stand the appraisal process and pro-vide professional, reliable, and com-prehensive appraisals to a variety ofindustries,” said Dale Greene, UsedConsignment Manager. “Our apprais-al services team works in concert withour inspection services team and ourpricing and analytics group, providingthe industry with unmatched experi-ence and perspective in appraisal andvaluation assignments for our clients.”

Equipment owners who want toadjust their fleet size have threeoptions: sell machines themselves,take them to auction or use a consign-ment program, added Greene.

“Empire believes that for themajority of contractors, consignmentprovides significant advantages,”Arrington said. “For that reason,Empire created a consignment pro-gram that maximizes the owner’s ben-efits while minimizing sale costs.Consigning with Empire means youcontrol the sales price and can keepthe machine in service, while Empirehandles all advertising and marketing.We ensure your machine gets maxi-mum exposure through our dealer net-work and international advertised list-ings. The Eloy Sales Center isn’t justacres of equipment. From appraisalsto warranties, Empire offers endlessused equipment options to keep yourjob up and running.”

For more information, visitwww.empirecat.com/eloy.

(This story also can be found onConstruction Equipment Guide’swebsite at www.constructionequip-mentguide.com.)

ELOY from page 4

Empire, a top ranked Cat dealer, provides clients with easy access to — and first pick of — many brands of quality new and pre-owned equipment.

Equipment owners who want to adjust their fleet size have three options: sell machines themselves, take them to auction or use aconsignment program.


2 DAY LIVE AUCTION 8359 W. TANGERINE RD.MARANA, AZ 85658

FRIDAY, JULY 8 • SATURDAY, JULY 9 PREVIEWTHURS, JULY 77AM-7PM

8 AM BOTH DAYS

Bid On: Heavy civil equipment, trucks, tractors, trailers, shop equipment, watertrucks, screens, buckets, trench boxes,

hand tools, building supplies, office furniture,lots of steel & much more!

To view the auction items &for more information contactRamirez Auction Service Inc.

by visiting www.ucanbid.com

or call us at (520) 241-3333

Going outof Business!


Arizona’s Crushing & Screening AuthorityServing the Entire Southwest from our Gilbert, AZ Location

Phone: 480-907-7433Cell: 602-295-9645

[email protected]

Survey to Help Chart State’sTransportation Futuredecide when, where and how to invest limit-ed transportation funding to improve roads,public transportation, sidewalks, bikewaysand more.“Taking part in the National Household

Travel Survey requires just a few easy stepswith one purpose: We want to hear your trav-el story,” said John Halikowski, ADOTdirector. “Your answers are valuable no mat-ter how you get from place to place.”For those who aren’t invited to participate

in the National Household Travel Survey,ADOT has created an online survey avail-able at azdot.gov/NHTS. Information gath-ered through this survey also will help createa more valuable transportation system for all.The National Household Travel Survey,

conducted every five to seven years, pro-vides an essential snapshot of transportationbehaviors and trends by asking how mem-bers of a household get around on one day.Participation, which is voluntary, starts

with filling out a brief survey that comes

with the invitation letter and returning it in aprepaid envelope. That takes about 10 min-utes. Participants receive travel logs torecord where members of their household goon an assigned travel day. Then they providethe information online or by phone, aprocess that usually takes 20 to 25 minutes.Using a federal grant, ADOT has com-

missioned extra survey responses frombeyond the Phoenix and Tucson areas tolearn more about travel behaviors and trendsin rural Arizona. The goal is for about 80 per-cent of all National Household TravelSurvey participants to live beyond the SunCorridor.By law, all information provided is kept

confidential, will be used only for researchand cannot be sold. Names and other identi-fying information aren’t linked with the sur-vey data used to create statistical summaries.For more information, visit

azdot.gov/NHTS.(This story also can be found on

Construction Equipment Guide’s Web siteat www.constructionequipmentguide.com.)

SURVEY from page 1

New Sturdier Dam to Allow for Nearby Developmenting of concrete, electrical work,construction of cement-bentonitewalls, wall scouring, gate fabrica-tion and erection, installation ofhydraulic systems and lake drainage.Other than the lake being closed,

the project had little impact on thesurrounding community. No roadshad to be closed.

Contractors SelectedTempe-based PCL Construction

was prime contractor of the projectand also installed the hydraulicsystem. Gannett-Fleming ofPhoenix was the engineering con-sultant; Schuff Steel of Phoenixprovided the steel for dam gatefabrication; and Steel Fab ofFitchburg, Mass. did the fabrica-tion. About 45 workers were on thejob each day at the project site.The Arizona Department of

Water Quality, Army Corps ofEngineers, FEMA and FloodControl District of MaricopaCounty partnered in the project.They also were the permittingagencies.

Decision to Replace the DamA decision to replace the dam

dates back to July 20, 2010, whenone of the rubber dam’s two blad-ders ruptured causing water to flowinto a nearby riverbed. Plans werethen developed to replace theinflatable rubber bladders with anew and sturdier structure.The lake opened in 1999 and at

the time of the rupture the rubberbladders were already past theirexpected life span.In January 2012 the Tempe City

Council approved a plan to pur-chase and install a gate dam. Thenew dam has eight steel gates, each106 ft. (32.2 m) long and 17 ft. (5.2m) high. Each gate weighs 260,000lbs. (117,934 kg).The gates are mounted onto a

roller-compacted concrete founda-tion and reinforced concrete spill-way slab about 100 ft. (30.5 m)downstream from the existing dam.Hydraulic lifts will raise and

lower the gates. The gates can belowered to allow storm waters topass through. They can then beraised to re-establish the lake.

About 2 ft. (.60 m) of water canpass over the top of the gates whenthey are in a fully-upright position.More than 20 dam alternatives

were explored before choosing thesteel-gate system. One advantage isthat it will allow the lake to transitioninto a river during major flooding.

Lake Water RemovalPosed Challenges

The project team knew going into the construction project that waterremoval was going to be challeng-ing. However, no one knew just howdifficult an undertaking it would be.“We had a lot of water coming

in from the north slope, which wasexpected, but not at the rate it wasflowing,” said Adam Gordon, PCLConstruction project manager, in aPCL Construction website article.“This project is also 100 feetdownstream of an existing damthat holds approximately one bil-lion gallons of water. Water is com-ing from every direction.”Also, advanced technology was

vital. Crew members usedBuilding Information Modeling to

ensure dam gate anchor bolts wereset perfectly in place.Additionally, weather posed

some problems in the project’s earlystages. The Tempe area experiencedrecord-breaking rains in September2014. The rains came while work-ers were digging the dam founda-tion, which flooded the job site.

Benefits of New DamThe improved lake will make

Tempe safer and allow for nearbydevelopment. The lake has already

benefitted the city with about $1.5billion in economic impact over a16-year period.About 40,000 people work

within a mile of Tempe Town Lakeand 4,000 people live near itsshores. The lake provides recre-ational opportunities and a relaxingcommunity gathering place.

(This story also can be foundon Construction EquipmentGuide’s website at www.con-structionequipmentguide.com.)CEG

Pistols, Knife Found at Bottom ofDrained Tempe Town Lake

TEMPE, Ariz. (AP) Tempe police found a number of weaponsat the bottom of Tempe Town Lake when it was drained.

Police said they recovered a knife and three pistols, one ofwhich was stolen, as well as part of another pistol when the lakewas empty.

Officers said they are looking into the firearms to see if theywere used in any other crime.

The lake was emptied in March to complete construction on anew hydraulically operated steel-gate dam that replaced aninflatable rubber system.

TEMPE from page 8



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Arizona 13 2016

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