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Collin D. Haahr, E.I.T.

Civil Quality Control Engineer

Collin Haahr performed volumetric lab testing on a wide variety of state, city, and commercial projects for quality control of Superpave and other hot mix asphalt (HMA) designs. He has significant testing experience in performing asphalt binder extraction, asphalt binder grading, aggregate analysis, soil analysis, and pavement performance for many different clients throughout Missouri and surrounding states.


He has developed proficiency in performing hot mix asphalt performance testing such as Hamburg wheel test, semi-circular bending test (SCB), disk-shaped compact tension test (DCT). Collin is also skilled in data analysis, programming in Python, and Visual Basic, and has developed databases and custom scripts in both Python and Visual Basic. He has successfully used his programming background for creating custom databases for managing test results, improving efficiency and reporting data.


B.S. Civil Engineering, The University of Missouri-Kansas City, Kansas City, Missouri 2017


Engineer Intern: Missouri (No. 2018010327)

Nuclear Gauge Safety: APNGA (August 27th, 2018)

Hot-Mix Asphalt Aggregate: MoDOT (May 2nd, 2017)

Aggregate Specific Gravity: MoDOT (April 5th, 2017)

Aggregate Technician: MoDOT (March 29th, 2018)

Bituminous Technician: MoDOT (April 24th, 2018)

International Roughness Index Operator: MoDOT (April 24th, 2019)

Plasticity Index: MoDOT (March 27th, 2018)

Soil Density: MoDOT (April 17th, 2019)

Superpave QC/QA: MoDOT (June 5th, 2018)

Tensile Strength Ratio (TSR): MoDOT (April 25th, 2018)


American Society of Civil Engineers


Performance testing comparison study with KDOT on experimental Superpave designs

Performance and volumetric testing correlation study with the University of Missouri

Database of pavement performance values for Superior Bowen Asphalt 

National Center for Asphalt Technology (NCAT) round robin study for pavement durability

HMA and Superpave volumetric testing of Interstate 435 for MoDOT

Soil proctors and Atterberg limits for Bannister Federal Complex, Kansas City, MO

Aggregate consensus testing for Shawnee Mission Parkway, Kansas City, KS

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