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Andrea Collier

Senior Environmental Engineer

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Andrea Collier recently joined Barr with nearly 15 years of experience in water and wastewater infrastructure and planning, pollution control, and waste management. Her areas of expertise include wastewater treatment and permitting, stormwater management, drinking-water treatment and distribution, water supply planning, sewer inflow and infiltration assessment, and dam and reservoir operations. In her most recent position with the Missouri Department of Natural Resources, Andrea worked to protect the state’s water resources, including the Missouri, Mississippi, and White rivers. She has helped develop and improve state and federal water supply and infrastructure policy, and initiated the process of updating Missouri’s state water plan.


(573) 638-6013


Barr Engineering Co.
1001 Diamond Ridge
Jefferson City, MO 65109

Phone: 573-638-5000
Fax: 573-638-5001
Toll free: 888-324-3933