Project Summary: Most areas in Central Mississippi, Alabama, and Louisiana are covered by expansive clay which is well known for its swelling and shrinking caused by changes in water content due to seasonal variation. Helical Pile can be a popular choice to use for the new construction in Expansive Soil. The current study is monitoring the performance of helical piles installed in expansive clay. To evaluate the performance of Helical Piles in Expansive Soil, 30 piles with single and multiple helices with different diameters in installed at different depths to monitor the movement of the piles with seasonal moisture variation in expansive soil. After installation, the performance of the helical pile is monitored with the topographic survey. Based on the performance a design guideline of Helical Pile for new construction on Expansive Soil will be developed.