BOISE, Idaho (AP) — The outgoing director of the National Park Service says the agency must attract younger and more racially diverse visitors to the areas it manages and will probably uncover more cases of sexual harassment in its workforce.

Jon Jarvis is ending his 40-year career in January. His final full year coincides with the park service's 100th anniversary. The service this year was rocked with corroborated allegations of sexual harassment in its 22,000-employee workforce. Some lawmakers called for Jarvis' resignation.

He says he was due to leave the service in January when a new U.S. president takes office. He calls the sexual harassment horrible and unacceptable and says he was unaware it had been taking place. He expects more cases to emerge with the agency actively investigating.