CVN Drydock Following RepairsThe Navy’s CVN Drydock No. 6 had been experiencing settlement for over 40 years. Cracks in the floor slab raised concerns over its structural integrity. Geotechnical investigations indicated loose fill materials and a damaged relief drain system underlying the slab. Compaction grouting was conducted to increase the density of underlying materials at select locations. Additional relief wells were constructed to aid the original relief drain system surrounding the ground improvement modifications. Temporary dewatering wells were also installed to facilitate compaction grouting and relief well construction.