The Brown County Sheriff’s office is investigating the drowning death of a 2-year-old girl. According to authorities, the child died while swimming by the Ordway dam Monday evening. The Ordway dam is about six miles north of Aberdeen on 125th street. The sheriff’s office believes the girl was playing in the water while the mother and her boyfriend were fishing. She then disappeared and was found unresponsive when first responders were called around 7:45 p.m.