Below is a link where you can sign up to receive instant information for water conditions from the USGS on areas within Gaston County. Currently there are two gauges, one located on Long Creek in Bessemer City and one on the South Fork River in Lowell. These will provide you with updated river levels depending on the values you select. Also there is rain flow gauges placed thru out the County that may be of interest to you.
Have real time information provided to you when you need it if you live along any of these creeks or river. http://www.usgs.gov/newsroom/article.asp?ID=2464