OSC Maguire responded to an oil spill from a wet gas drilling platform which has discharged into Cow Run Creek . The incident occurred on May 4 at 15:09 EST (not reported to NRC till 21:27) at 1244 Center Bend Road (Beverly, Ohio). Cow Run Creek leads to Olive Creek which leads to the Muskingum River. The responsible party PDC Energy reported a loss of well control during horizontal drilling operations that resulted in a release of oil based drilling mud and wet gas. The site was shut down and personnel were evacuated due to a release of natural gas. PDC Energy response personnel were conducting response actions (boom, earth dams, etc..) to recover oil on Cow Run Creek. The release is not fully secured, however containment operations have successfully kept the oil drilling mud from entering Olive Creek thus far. Ohio EPA is also on scene.