Chinook salmon successful at guarding their redds. Chinook eggs hatch, 90 to 150 days after deposition, depending upon water temperature. Egg deposits are timed to ensure the young salmon fry emerge during an appropriate season for survival and growth. Fry and parr (young fish) usually stay in fresh water 12 to 18 months before traveling downstream to estuaries, where they remain as smolts for several months. Some Chinooks return to the fresh water one or two years earlier than their counterparts, and are referred to as "jack" salmon. "Jack" salmon are typically less than long, but are sexually mature and return at
Salmon Creek Dam the city. However, this source is subject to seasonal high turbidity and also interruptions due to the annual maintenance of the generator units. This system is able to supply of water. The water resources are generally pollution-free and quality is monitored and tested every month to check for drinking-water standards set by the EPA and Alaska Department of Environmental Conservation (ADEC). In 1880, the Salmon Creek was named by Richard Harris and Joe Juneau (during their first visit to the area for gold prospecting). The local people called it "Tilhini" meaning "dog salmon" a native name used by Tingit Alaskan