and less pollutants entering freshwater systems. Urbanization Urbanization of the Puget Sound lowlands has had a primarily negative impact on the salmon species that spawn in the surrounding streams and rivers. One of the most noticeable changes in these urbanized areas is the increase in the traditional 10-year flood being reduced to occurring once every 1–4 years. As a result of this increase in flood waters the areas where salmon lay their eggs are being washed away; this is because salmon lay their eggs just far enough beneath the bedrock to accommodate for the traditional annual flood, but due to urbanization the annual flood waters have increased and the layer of bedrock where salmon lay their eggs is washed away. This leaves the salmon with less habitat to successfully spawn on as a result. As stated above the one way to fix this problem is to use LID methods to help with the filtration process which at the same time reduces the quantity of water being put into the streams and rivers. Salmon and the economy In a letter to Senators Patty Murray and Maria Cantwell, Washington State's Trollers Association board member Jeremy Brown noted that salmon "aren't just a part of our state's natural heritage, they are also very important to our economy." The letter was composed by 120 business and community leaders who expressed a range of concerns. But, other business owners tend to agree that salmon are a crucial to the state's economy, and that recovery efforts do not go far enough to protect them. In the Pacific Northwest, fishing accounts for 36,000 full-time jobs including catching, canning, and selling. However, one must also consider the jobs created by Puget Sound Salmon not directly related to the fish. The sale of boats, boating equipment, and other fishing necessities are impacted greatly by the continued supply of salmon. Fishermen warn that if the salmon supply continues to dry up, so will their jobs, and the jobs of many who depend on them. There are groups that are trying to make the relationship between people, salmon, and the economy more sustainable. In 1999, The Center for Watershed and Community Health (CWCH) created the Salmon Economics Project in order to assist decision makers in understanding economic issues regarding salmon. The Project claims that salmon issues are widespread and have deep roots, and that habitats must be restored across large landscapes.