Complex sentence: The influx of gold diggers lead to a stream of wealth pouring into the previously poverty stricken region as well as some severe health problems including dust from the dry diggings, unsanitary conditions, disease, death and crime.
Split into simpler sentences: The influx of gold diggers created a stream of wealth pouring into the previously poverty stricken region. However, severe health problems caused by dust from the dry diggings and unsanitary conditions also appeared in dig sites, along with other types of diseases, death and crime.