PELLA, Iowa – Yancey Bros. Co. and Thunder Creek Equipment have reached an agreement that will make the heavy equipment dealer an official provider of Thunder Creek’s products throughout Georgia. Yancey Bros. Co. will sell and service the full line of Thunder Creek fuel, diesel exhaust fluid (DEF) and service products, including its line of Multi-Tank Trailers (MTT) and Service and Lube Trailers (SLT).