sentences:  Two self-contained communities, Guild (now Haletown) and Ladds, were built to house the thousands of construction workers needed to build the dam.The dam was originally slated for completion in 1909, but numerous difficulties brought about primarily by the soft bedrock upon which the dam was built continuously stalled construction, and by 1910, only the lock and powerhouse had been completed.Engineers finally began to make progress after employing the use of pressure grouting and concrete caissons— the first use of either in a major dam construction project— and Hales Bar Dam was finished on November 11, 1913.