Since 1994, Nancy Creek has had a USGS stream gauge in the Paces neighborhood of Atlanta at West Wesley Road (NANG1, ), with NWS flood stage being at that point. The drainage basin above it is . Since 2003, there is another gauge further upstream in Buckhead at Rickenbacker Drive (NCKG1, ). The basin at that point is , above an elevation of , with a flood stage of . Records of manual observations actually go back to 1961 at both sites (which are considered to be "at Atlanta"), but the latter gauge (often called "at Buckhead" to avoid ambiguity) appears to be the officially-used one.