"The construction of NW Yeon Avenue in 1930 provided improved access and facilitated the increasingly important role of trucking as an industrial transportation mode. Following World War II, large-scale industrial businesses expanded in the Guild’s Lake area, particularly in the northern sections, where chemical and petroleum processing and storage facilities located. An agglomeration of metals manufacturing and processing companies emerged as an important component of the local economy. Today, industrial operations in the Guild’s Lake Industrial Sanctuary include manufacturing, fabrication and processing, warehousing, transportation and industrial services."