Georgia 18, August 26, 2020

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New materials for the bridge construction include 110,000 lbs. of rebar; 700 cu. yds. of concrete; and 8,000 tons asphalt.

Aerial map view of the construction project area

Page 2 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

Work Continues on Major Upgrade to Macon Interchange Contractors for the Georgia Department of Transportation (GDOT) are hard at work on the construction activities related to the I16/I-75 Interchange Improvement Project in Macon-Bibb County.

With a cost of $500 million, GDOT considers the upgrade to the I-16/I-75 interchange to be a top safety and mobility megaproject for the state of Georgia. Its massive scope includes widening and reconstructing the two interstates in Bibb County, as well as the interchange in the City of Macon.

Ground was broken in 2017 on the I-16/I75 Improvement Project, which is to be delivered in seven design and construction phases that will continue through 2030.

E.R. Snell Contractor Inc., in Snellville, Ga., is responsible for the construction of Phases 1b, 2 and 3 of the interchange improvements under two separate contracts worth $168 million. GDOT also awarded a $63 million contract to Marietta-based C.W. Matthews for the Phase 1 construction.

The I-16/I-75 reconstruction project will improve the safety of the corridor by widening and reconstructing I-75 from Hardeman Avenue to Pierce Avenue, and I-16 from I-75 to Walnut Creek within the City of Macon.

Each of the interstate highways are being improved with the construction of wider shoulders, concrete barriers and, in most locations, additional lanes.

A Collector/ Distributor (CD) road system is being constructed parallel to both I-16 and I-75. Modifications to bridges and surface streets within the project area will accommodate the additional lanes and CD roads along the interstates. These improvements will provide opportunities for turning movements, as well as create additional storage for these turning movements.

GDOT said when the I-16/I-75 Interchange project is complete, new on-and off-ramps, improvements to 11 bridges, new walls and upgraded drainage systems will deliver safer and improved mobility for Macon-Bibb’s local commuters and businesses, regional travelers and commercial freight from Georgia’s southern coast to destinations within the state and throughout the United States.

The first three phases of the project are currently under way in Macon-Bibb County.

So that construction crews work can work safely this summer and beyond, long-term closures include: • The dedicated right turn lane on the I-16 eastbound off-ramp to Spring Street will be shut down through the spring of 2021.

• A permanent lane closure on Coliseum Drive/Martin Luther King, Jr. Boulevard southbound between Clinton Street to Riverside Drive. Southbound traffic in that area is currently reduced to one lane.

GDOT photo

A view of the I-16/I-75 Interchange facing south.

• The far-right lane of I-75 northbound at GA 19/Georgia Avenue (Exit 164) is closed to traffic for several months.

• Spring Street's far-right lane at the I-16 westbound on-ramp, as well as the righthand on-ramp to I-16 westbound, are also both closed for several months, while the Spring Street on-ramp to I-16 westbound has been relocated to the far-left lane.

The second full week of July saw work on Phase 2 and Phase 3 from Hardeman Avenue to I-16 eastbound. Included in that construc-

tion was: • Continued building of the Riverside Bridge superstructure over I-75 and the Walnut Street bridge superstructure.

• Work on the substructure and superstructure of the I-16 westbound bridge over the Ocmulgee River.

• Erecting retaining walls and concrete sound and visual walls alongside both directions of I-75.

• Starting the placement of asphalt and concrete pavement on the far-right lane and

GDOT photo

I-16 eastbound, along the Ocmulgee River and Macon-Bibb County’s downtown. The recently completed Martin Luther King Jr. Boulevard Bridge and the exit from I-16 can be seen.

right shoulder lane of I-75 northbound between Hardeman Avenue and the Pedestrian Bridge.

• Continuing the demolition of the concrete pavement on the left lane along I-75 southbound from the Riverside Drive bridge to the Hardeman Avenue bridge.

• Completing the demolition of the existing I-75 southbound bridge over the Norfolk Southern Railroad.

• Paving in the right lane on I-75 northbound between the Walnut Street bridge to just south of the Riverside Drive bridge.

The first phase of the project is made up of various improvement tasks from the I16/I-75 split to the Martin Luther King Jr. Boulevard exit. Among them are: • Continued work on the superstructure for the bridge along I-16 eastbound near Spring Street.

• Work on the superstructure and the substructure of the new I-16 eastbound bridge over the Ocmulgee River.

• New retaining walls along I-16 eastbound between Spring Street and Martin Luther King Jr. Boulevard.

• Ongoing demolition of the existing Martin Luther King Jr. Boulevard Bridge over the Ocmulgee River.

• Grading activities will continue at the I16 eastbound entrance and exit ramps at Martin Luther King Jr. Boulevard and Spring Street.

• Crews also will remove the existing pavement on Spring Street’s far-left lane under the I-16 bridges. 

Construction Equipment Guide • Georgia State Supplement • www.constructionequipmentguide.com • August 26, 2020 • Page 3

Page 4 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

Lifesaving Cable Barriers Coming to I-20, I-520 Medians

GDOT photo

Soon various sections of Interstate 20 and Interstate 520 will be equipped with cable median barriers, which reduce highway crossover crashes that typically result in fatalities or severe injuries.

Sections of Interstate 20 and Interstate 520 in Georgia will soon be equipped with cable median barriers to reduce crossover vehicle crashes that typically result in fatalities or severe injuries.

The Georgia Department of Transportation (GDOT) recently awarded an $8.048 contract to Nationwide Construction Group, a Michigan-based fence and barrier specialist. The highway project will include barriers covering median locations in Newton, Taliaferro, Warren, McDuffie, Columbia and Richmond counties, according to the GDOT. The construction will ensure a presence of safety barriers throughout the entire I-20 corridor between Augusta west to Covington and add them to I-520/Bobby Jones Expressway, according to the agency.

The timing of the installation will be determined later this year, when the contractor mobilizes for the installation, but completion is expected by April 30, 2022.

The Federal Highway Administration (FHA) calls cable median barriers “costeffective means of reducing the severity of median crossover crashes.”

The cable barrier system going along I-20 is four-cable longitudinal designed to contain and redirect errant vehicles. It will match ones installed in the past two years on I-16 and I-20 in east central Georgia.

The agency said cable barriers are softer than other barriers, resulting in less impact force and redirection, are more adaptable to slopes typically found in medians, and can be installed through less invasive construction methods. 

GDOT Awards Contract for $5.2M DDI in McDonough A project first proposed in 2015 is going to construction after the Georgia Department of Transportation (GDOT) awarded a contract July 31 for the installation of a diverging diamond interchange (DDI) at I-75 and State Route 20 in the Henry County town of McDonough. The site is located at I-75’s Exit 218 south of Atlanta.

The reconfiguration project’s estimated completion date is April 30, 2022.

CMES Inc. of Norcross, Ga., was awarded the lowest bid in the amount of $5,215,335.76. The enterprise is funded through federal transportation dollars.

The McDonough location is the second installation of the innovative DDI design in south metro Atlanta following a rebuild of the interchange at I-285 at Camp Creek Parkway.

The design was first implemented in Georgia in 2012 and fewer than 10 currently

are operational statewide. Other examples ings, road signs, and directional arrows to six lanes will include two through lanes and can be found at Ashford-Dunwoody in help guide motorists through the exit. When one left-hand turn lane in each direction.

Perimeter (the first DDI in Georgia, opened complete, the bridge will feature six lanes Construction will require one weekend, in 2012), I-75 at Windy Hill Road near the with a barrier-protected 10-ft. wide center possibly a second, where the bridge is Atlanta Braves stadium, and I-85 at Jimmy sidewalk for pedestrians and cyclists. The closed. When this occurs, motorists will be Carter Blvd in Gwinnett County. able to enter or exit the interstate, but Diverging diamonds feature a not cross over the bridge. These crossover design where drivers temweekends will happen during later porarily drive on the left-hand side phases of construction and the dates of the roadway when crossing the will be communicated in advance bridge. This allows motorists enterwhen scheduled, according to the ing or exiting the interstate to turn GDOT. left without crossing in front of Following the DDI project, a opposing traffic. The design widening of SR 20 from I-75 to improves traffic operations by an Phillips Drive is scheduled to let for estimated 30 to 40 percent — reducconstruction in November 2021. The ing motorist delays — and lowers work will expand the road from two crash rates. to four travel lanes and build a new The new interchange on I-75 at State Route 20/Exit 218 will be converted into a multilane roundabout at the intersecMcDonough’s southwest edge will DDI. CMES Inc. of Norcross, Ga., was awarded the low- tion of SR 20 and McDonough feature additional pavement mark- est bid in the amount of $5,215,335.76.

Parkway. 

Construction Equipment Guide • Georgia State Supplement • www.constructionequipmentguide.com • August 26, 2020 • Page 5

Page 6 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

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Page 8 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

E.R. Snell Works To Demolish Bridge, Build Better One

General Contractor E.R. Snell utilized Komatsu 290 excavators; John Deere 650 dozers; and John Deere 544 loaders for the State Route 11 bridge replacement project.

By Irwin Rapoport CEG CORRESPONDENT

Crews from E.R. Snell Contractor Inc. began the demolition of the existing 250-ft. long, two-lane bridge on State Route 11 on Aug. 5 as part of the Georgia Department of Transportation’s $5.3 million bridge replacement project.

The bridge project is taking place in an area between the town of Bethlehem and city of Monroe. The work started in December 2019 and is scheduled to be delivered on Oct. 30.

E.R. Snell has already constructed the new 240-ft. long, three span concrete bridge with one lane in each direction, 8ft. wide shoulders on either side and half turning lanes on either end. The bridge does not have a bike path or pedestrian walkway.

Traffic was switched to the new bridge on Aug. 4. The first phase also included raising the elevation on Emmett Doster Road by about 15 ft. and some work on the new alignments.

The second phase is demolishing the old bridge and road work for the new alignments.

The original concrete bridge — also three spans and one lane in each direction — had been constructed several decades ago.

The new bridge and adjacent road improvements were designed by Long Engineering. The existing bridge carried thousands of cars and trucks daily and did not have any shoulders. The new shoulders will help to improve safety on the structure.

Construction Plan The basic plan of attack for the bridge construction was to first build the caissons, then place the concrete beams and pour the deck.

The new bridge has four caissons — two on each side — separated by 20 ft., and three spans — a center span that is 120-ft. long, and two, 60-ft. spans on either end.

“We brought in about 40,000 yards of material,” said Jordan Dunagan, E.R. Snell’s vice president of construction/structures and project manager. “There will be no weight limit on this bridge. It’s a lot more durable.”

Winter and spring rains posed the greatest challenge to the construction process.

“We’ve come through a really, really rainy winter and spring, which was challenging because the job is located in a hole down by the river,” said Dunagan. “We lost a couple of months of working days just for it being too wet to haul dirt. The rains had been rough on everybody. GDOT was very understanding of the situation, and we have a very good relationship with them.”

There are no soil or utility issues impacting the bridge construction and demolition, and most of the work is being done in daylight hours.

Materials & Equipment The earth work resulted in 25,000 cu. yds. of borrow excavation and an overall total of 50,000 cu. yds. in excavation.

New materials for the bridge construction include 110,000

lbs. of rebar, 700 cu. yds. of concrete, and 8,000 tons asphalt.

Dunagan pointed out that the metal will be sent to a recycling center and the concrete will be used as fill.

“Most of everything will be used on-site,” he said. “It’s all per-specifications.”

Equipment on-site includes Komatsu 290 excavators; John Deere 650 dozers; and John Deere 544 loaders.

“We’re fortunate in that we run very nice and new equipment,” said Dunagan. “We didn’t really experience a lot of break downs. We have a good fleet. A job this small doesn’t justify a mechanic on-site all the time. We have mobile mechanics and if we need one, they can be here in within 30 minutes.”

The work site is tight.

“A lot of closures out on the existing Highway 11 created main access points onto the job,” said Dunagan.

Caisson construction began in December and was finished in January — this was necessary so that the intermediate bent could be installed, along with the middle span beams, and dirt placed for both bridge in-roads.

“The caissons were drilled with a D300 caisson drill rig,” said Dunagan. “We don’t allow anybody inside the shafts anymore. With cameras and other technologies, we don’t have to go into them.”

The caissons were drilled about 50 ft. below the riverbed.

The shafts were filled with concrete and rebar.

The intermediate bents — two and three — were poured see BRIDGE page 10

Construction Equipment Guide • Georgia State Supplement • www.constructionequipmentguide.com • August 26, 2020 • Page 9

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Page 10 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

Crews Work On GDOT Project Between Bethlehem, Monroe Peak days have 15 to 20 E.R. Snell and subcontractor personnel on-site, with the main subcontractors being Powell Drilling for the caissons; E.L. Jones Construction for concrete retaining walls; and Key Curving, which did all the flatwork, ditch paving and driveways.

The earth work for the demolition resulted in 25,000 cu. yds. of borrow excavation and an overall total of 50,000 cu. yds. in excavation.

BRIDGE from page 8

on top of the caissons. The beam setting was executed using a Link-Belt 218 110 ton crane and a Liebherr 300 ton crane.

The cast-in-place deck pour began rapidly following the placement of a screed. Galvanized aluminum pans formed the false decking.

“It’s a lot more cost effective and time saving than using wood,” said Dunagan, who noted that the bridge construction took nearly seven months.

The bridge demolition should take three to four weeks.

“We’re keeping the river clean,” said Dunagan. “We’re sawing the deck and lifting out the pieces to ensure that nothing gets into the water.”

The demolition started on the northern side and is proceeding to the other end, allowing the crane and loaders to operate on the bridge as it is being removed.

“We don’t see any challenges right now — it’s a straightforward course,” said Dunagan, who has been managing projects for 15 years. “You’re always learning on each project.”

Stage 2 road work covers shoulder work and some driveways.

“For the new alignment, we’ll place some new asphalt toping,” said Dunagan. “We should be doing this around September 30. We’ll have flaggers in place when we start the paving operation.”

Dunagan is satisfied with the efforts of his management team and the crews.

“Everybody works great together,” he said. “A lot of team work and planning goes into this. It’s a great effort by all.”

Peak days have 15 to 20 E.R. Snell and subcontractor personnel on-site, with the main subcontractors being Powell Drilling for the caissons; E.L. Jones Construction for concrete retaining walls; and Key Curving, which did all the flatwork, ditch paving, and driveways.

E.R.Snell makes it a point to send equipment to projects in good working order and with its substantial fleet, purchas-

es equipment from dealerships representing the major manufacturers in the country.

The traffic management plan was primarily based on maintaining traffic on the existing bridge while building the new one close to it. Temporary lane closures have helped E.R. Snell do some road work and bring equipment and materials in and out of the job site.

With many DOTs ramping up work due to fewer vehicles

on the roads, a GDOT press release stressed “Motorists are cautioned to reduce their speed while traveling through work zones, stay alert, and watch for workers,” which is appreciated by E.R. Snell and other general contractors. For this and other projects, GDOT is asking travelers to secure real-time information on work status and traffic conditions by calling 511, visiting 511ga.org, or downloading the Georgia 511 app.  CEG

The new bridge has four caissons — two on each side — separated by 20 ft., and three spans — a center span that is 120-ft. long, and two, 60-ft. spans on either end.

Construction Equipment Guide • Georgia State Supplement • www.constructionequipmentguide.com • August 26, 2020 • Page 11

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Page 12 • August 26, 2020 • www.constructionequipmentguide.com • Georgia State Supplement • Construction Equipment Guide

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