This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.DAVIDSON COUNTY, N.C. — Volunteers with the High Rock Lake Clean Sweep program cleaned up sections of the lake Saturday, officials with the program said. The High Rock Lake Clean Sweep program is a nonprofit that was created to encourage people living around the lake to volunteer for the clean-up event. Gloves, trash bags and plastic boat deck coverings were given out. Specific clean-up assignments were also distributed to volunteers at a pre-registration event Friday and on Saturday. The event is going from 7:30 a.m. to 3 p.m. It is being held at two separate places: the Southmont Access Area and Dutch Second Creek. The clean-up follows the discovery of black mat algae in the lake earlier this month, which concerned lake goers.