Responsibly Improving the World We Live In
Become the Best Company in the Industry with a culture that: • Inspires Employees • Elates Clients • Creates Value for our Employees, Clients and Business Partners
Innovative. Full Service. CHA Consulting, Inc. is a full-service engineering consulting and construction management firm that can supply all the planning and engineering services needed to complete your project on time and budget. Every project has unique goals, obstacles, and perspectives— but after many decades, we’ve learned some things. Simply put, experience matters; it teaches us what is possible and provides solutions that are real-world and workable. Experience guides us to craft effective solutions and unique opportunities for each project. Experience yields excellence. Choose the team with experts.
Transportation Safe, efficient, and effective highways and bridges are essential to healthy communities. For more than 60 years, CHA has provided the experience, wherewithal, and expertise to design transportation systems that connect people with opportunities. We aim to enhance our nation’s infrastructure. Our in-house transportation specialists plan, design, and help maintain and construct these valued assets for state, local, and private transportation owners, agencies, and authorities. CHA addresses your immediate needs with cost-effective solutions that consider all costs and impacts over a project’s life cycle. With a listening ear to your community and stakeholders, we invent balanced resolutions that foster goodwill among everyone affected. We gravitate towards answers in your best interest—with the most value—supplying the services and the people who can help you be more.
Services Highways Urban & Rural Highway & Interchange Design Design-Build Environmental Analyses & Documentation Regulatory Compliance & Permitting Public Outreach & Engagement Programs Streetscape & Enhancements Design Conventional & Innovative Intersection Design Drainage Design and Municpal Separate Storm Sewar System (MS4) Lighting Design
Bridges & Structures Bridge (Concrete, Steel & Rail) Design, Evaluations & Inspections Accelerated Bridge Construction Retaining Wall Design Contractor Services Temporary Walls & Bulkhead & Seawall Design Demolition Plans for Steel & Concrete Structures Crane & Equipment Load Verifications Fatigue & Fracture Studies Hydraulic Studies & Scour Revetment
Traffic & ITS Studies & Analysis Signal Design Development Traffic Signal Operations & Maintenance Intelligent Transportation Systems
Survey and Subsurface Utility Engineering (SUE) Boundary Surveys Topographic Surveys Corridor Surveys Utility Location, Designation, Design, and Coordination
Team
Joe Macrina, PE
Paul Slone
Jason Dickerson, PE
Executive Vice President
Senior Principal Engineer and Project Team Leader
Vice President
Luke Sanders, PE
Scott Gordon, EdD, PLS
Andrew Truelove
Project Manager
Survey/SUE Manager and Project Team Leader
Survey Manager
Josh Gilbert
Marcelle Davis
Jim Aitken, PE
Survey Project Manager
SUE Manager
Associate Vice President Georgia Transportation Manager
Kevin Kahle, PE
Nguyenvu Vo, PE
Pervez Iqbal, PE
Structures Section Leader/ Project Manager
Lead Structures Engineer/ Project Manager
Principal Engineer and Project Team Leader
Umit Seyhan, PE
Daniel Taylor, PE
Chris Edmonson, PE
Principal Transportation Engineer
Project Manager
Senior Highway Engineer
Maureen Nerenbaum, PE
Ian Maxfield, PE
Leah Cassell, PE
Senior Highway Engineer
Roadway Lead
Project Manager
Award Winning Innovation CR 661/Blackhall Road over Rum Creek (PI 0011691) Like many bridges built in the 1960s, the original Blackhall Road bridge over Rum Creek in Georgia didn’t meet modern design standards. It was narrow, with a substandard vertical curve, and showed signs of wear. The Georgia Department of Transportation (GDOT) wanted a bigger and better bridge to meet the community’s needs with minimal traffic flow disruption. That’s where problems arose. The original plan was to close the road for nine months while a replacement was built. However, that generated a local uproar in the community, causing the project team to rethink their design and reduce the closure time to just two months. They came up with a hybrid precast concrete solution using accelerated bridge construction (ABC) techniques to create the new 195foot two-lane bridge with 2-foot travel lanes and 8-foot shoulders. Hybrid Design Solution to Site Constraint Issues A nearby dam and homes caused a very tight job site. The design team came up with a plan to use the American Association of State Highway and Transportation Officials (AASHTO) precast concrete bulb-tee beams as the bridge’s base, then to cast the bridge deck on top of them at designated staging areas on-site. “It was the first project in Georgia to use a hybrid concept of using precast concrete beams and precasting the deck in an on-site lay-down area while maintaining the traffic on the existing bridge,” says Dexter Whaley, bridge design ABC liaison for GDOT.
By casting the deck in place at the project site, the common problem of profile management created by differential cambers in precast concrete decked bulb tees was eliminated. False bents that matched the vertical profile and cross slope of the proposed bridge superstructure were fabricated to make construction work. This method allowed the bridge superstructure to be constructed before closing the road. “It was an innovative use of precast concrete that allowed us to reduce the duration of the road closure and impact to the public from months to weeks,” says Kevin Kahle of CHA Consulting. Once the roadway was closed, the existing bridge was demolished, and the new permanent bridge foundations and substructures were constructed. After completing the substructure, the deck girders were transported and erected on the permanent bridge substructures using an 800-ton-capacity crane. Steel diaphragms were used as both temporary bracing for the initial deck pour in the staging yard, then they were reinstalled, and the bridge edge beams and end-walls were formed and cast with 24-hour concrete. Wood formwork and foam were used to create block-outs for the nine-inch closure pour between the precast concrete decked beam unit.
When the deck was fully cured, the skim pour was chipped out, and the foam and wood forms were removed. The skim pour created cross-slope continuity across the deck that would not require additional grinding to achieve a consistent deck surface between each decked beam unit. In the final phase of construction, 9-in. closure strips were poured using ultra-high-performance concrete (UHPC), and the deck was ground to remove minor undulations. After grooving and completing the roadway approaches, the road was reopened to traffic on schedule, after only a 60day closure. ASPIRE featured an article on this award-winning bridge project in the February 2021 issue detailing the traffic maintenance challenges and ABC solutions.
Awards: • PCI-Certified Precast Concrete 2021 Design Award • Best Bridge with a Main Span From 76-149 Feet • 2021 ACEC Engineering Excellence Award
Notable Project Experience I-285 Top End Express Lanes, Atlanta, GA GDOT I-95 at SR 21 Diverging Diamond Interchanges (DDI) Design-Build, Savannah, GA GDOT (Contractor: R.B. Baker Construction) I-85/Poplar Road Interchange GDOT, Coweta County, GA US 27 at Custer Road Interchange Improvements, Columbus, GA Columbus Consolidated Government/GDOT TIA Office State Route 133 Widening, Brooks and Colquitt Counties, GA GDOT Newnan Crossing Bypass SE Extension, SR 16 Widening and US 29/SR14 Widening and Intersection Improvements Coweta County, GA West Winder Bypass over SR 8 CSX Transportation and CR 28 Barrow County, GA
Social Circle-Fairplay Road Relocation and Hard Labor Creek Reservoir Crossing Walton County Water & Sewerage Authority I-85 Bridges Design-Build, Jackson and Franklin Counties, GA GDOT Panola Road at I-20 Interchange Design, Lithonia, GA GDOT Regional Traffic Operations Program 1/2/3/4 (RTOP), Atlanta, GA GDOT Regional Traffic Signal Operations (RTSO) Project Regions 2/3, Atlanta, GA GDOT
Georgia Prequalifications CHA is currently prequalified with the Georgia Department of Transportation in the following work areas:
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State Wide Systems Planning Urban Area & Regional Transportation Planning Aviation Systems Planning Alternative System & Corridor Location Planning NEPA Documentation Ecology Airport Master Planning Location Studies Traffic Studies Major Investment Studies Aviation Two-Lane or Multi-Lane Rural Generally Free Access Highway Design Two-Lane or Multi-Lane with Curb & Gutter Generally Free Access Highways Design Including Storm Sewers Two-Lane or Multi-Lane Widening & Reconstruction, with Curb & Gutter & Storm Sewers In Heavily Developed Commercial, Industrial & Residential Urban Areas Multi-Lane, Limited Access Expressway Type Highway Design Design of Urban Expressway and Interstate
• Traffic Operations Studies • Traffic Operations Design • Traffic Control System Analysis, Design, and Implementation • Utility Coordination • Architecture • Hydraulic & Hydrological Studies (Roadways) • Facilities for Bicycle & Pedestrians • Highway Lighting • Minor Bridges Design • Major Bridges Design • Hydraulic & Hydrological Studies (Bridges) • Bridge Inspection • Land Surveying • Engineering Surveying • Geodetic Surveying • Subsurface Utility Engineering • Construction Inspection • Erosion, Sedimentation, & Pollution Control & Comprehensive Monitoring Program
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Evansville Knoxville Nashville Birmingham
Duluth Atlanta
Raleigh Concord
Chantilly Richmond
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Responsibly Improving the World We Live In 3/2021
Georgia Office Locations Atlanta | Duluth | Savannah