About 25 volunteers are needed for a city-sponsored Adopt-A-Stream project in Waikīkī. The event, hosted by the U.S. Army Corps of Engineers Pacific Regional Visitor Center, will meet at 9 a.m. at Fort DeRussy above the Army Museum. Must be 13 years and older. Supplies and refreshments will be provided. Volunteers should wear long pants, covered shoes, a hat and sunscreen. Free. Call Garland Ireland, 438-2815.