A longtime Sierra High School coach and teacher has been arrested for allegedly showing his genitals to teenage girls over the Internet, Colorado Springs police said. Dana Scott Anstey, 56, is scheduled to be advised Wednesday of the felony charge he’s facing. Police would not say whether the “girls” were victims or an undercover detective. Anstey was arrested Friday at his home in northeast Colorado Springs and jailed on suspicion of promoting obscenity to minors. He posted a $300 bail Saturday. Anstey has been a crosscountry and track coach at Sierra High on Jet Wing Drive in southeast Colorado Springs for about 18 years. The school’s Web site lists him as head coach and social studies teacher. Anstey began chatting online June 21 with three 13-yearold girls, according to a Colorado Springs Police Department report. “On more than one occasion, Anstey exposed his genitals to the girls using his Web camera,” the report says. “He also arranged to meet two of the girls for sexual contact.” The arrest marked the 30th this year by the Colorado Internet Crimes Against Children Task Force, headed by Colorado Springs police. Officers with the group often pose as teenagers online. A message left Monday at Anstey’s home wasn’t returned. It wasn’t clear how the arrest affects Anstey’s employment with Sierra High. Harrison School District 2 officials did not return a call about the case. If convicted of the Class 6 felony, Anstey faces up to 1½ years in prison and/or a fine up to $100,000.