
Puget Sound is a complex system of interconnected marine waterways and basins located on the northwest coast of Washington, US. It is part of the Salish Sea and is connected to the Strait of Juan de Fuca, which in turn, connects to the Pacific Ocean. The average depth of Puget Sound is 450 feet (140 m), while its maximum depth, off Jefferson Point between Indianola and Kingston, is 930 feet (280/283 feet). Puget Sound is also the second-largest estuary in the United States, with some arguing that it is the largest estuary by volume as it is much deeper than Chesapeake Bay, the largest estuary in the US.
| Characteristics | Values |
|---|---|
| Definition | A complex estuarine system of interconnected marine waterways and basins |
| Location | Northwest coast of the U.S. state of Washington |
| Part of | Salish Sea |
| Connections | One major and two minor connections to the Strait of Juan de Fuca |
| Major connection | Admiralty Inlet |
| Minor connections | Deception Pass and the Swinomish Channel |
| Extension | Approximately 100 miles (160 km) from Deception Pass in the north to Olympia in the south |
| Average depth | 450 feet (140 m) |
| Maximum depth | 930 feet (280 m) or 938 feet |
| Depth of the main basin | Approximately 600 feet (180 m) |
| Alternative term | Whulge or Whulj |
| Position among largest estuaries in the U.S. | Second-largest or largest by volume |
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What You'll Learn

Puget Sound's maximum depth is 930 feet (280m)
Puget Sound is a complex system of interconnected marine waterways and basins located on the northwest coast of the U.S. state of Washington. It is part of the Salish Sea, which also includes the Strait of Juan de Fuca and the Strait of Georgia. The term "Puget Sound" is often used to refer not just to the body of water but also to the surrounding region, which includes major cities such as Seattle, Tacoma, Olympia, and Everett.
Puget Sound is a deep estuarine system, with an average depth of 450 feet (140 meters) and a maximum depth of 930 feet (280 meters) off Jefferson Point between Indianola and Kingston. Its main basin, located between the southern tip of Whidbey Island and Tacoma, has a depth of approximately 600 feet (180 meters). The depth of Puget Sound is one of the factors that contribute to its claim as the largest estuary in the United States by volume, as it is significantly deeper than other estuaries such as Chesapeake Bay and Cook Inlet.
The Salish Sea, of which Puget Sound is a part, has three main connections to the Strait of Juan de Fuca, which then connects to the open Pacific Ocean. The major connection is Admiralty Inlet, while the minor connections are Deception Pass and the Swinomish Channel. Puget Sound extends approximately 100 miles (160 km) from Deception Pass in the north to Olympia in the south.
The term "Puget Sound" has an interesting history. In 1792, George Vancouver named the waters south of the Tacoma Narrows "Puget's Sound" in honour of Peter Puget, a Huguenot lieutenant who accompanied him on the Vancouver Expedition. Over time, the name came to be used for the waters north of the Tacoma Narrows as well. Native American and environmental groups sometimes use the alternative term "Whulge" or "Whulj", which is an anglicization of the Lushootseed name for Puget Sound, meaning "sea, salt water, ocean, or sound".
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It is the second-largest estuary in the US
The Puget Sound is a complex system of interconnected marine waterways and basins located on the northwest coast of the US state of Washington. It is part of the Salish Sea, which also includes the Strait of Juan de Fuca and the Strait of Georgia. The term "Puget Sound" is also used to refer to the Puget Sound region centred on this body of water, which includes major cities such as Seattle, Tacoma, Olympia, and Everett.
The Puget Sound is the second-largest estuary in the United States, after the Chesapeake Bay in Maryland and Virginia. An estuary is defined by the Environmental Protection Agency as a "partially enclosed, coastal water body where freshwater from rivers and streams mixes with saltwater from the ocean." The Puget Sound is deeper than the Chesapeake Bay, with a maximum depth of 930 to 938 feet compared to the Chesapeake Bay's depth of 174 feet. However, when considering the volume of water contained within the estuary, some sources argue that the Puget Sound is the largest estuary in the United States.
The debate around the size of the Puget Sound estuary arises due to the different ways of measuring the size of an estuary. While the most logical measurement is the area covered by water, one can also consider the volume of water or the watershed (the land area that drains into the waterway). When considering volume, the Puget Sound is larger than the Chesapeake Bay, with a volume of 40.3 cubic miles compared to the Chesapeake Bay's volume of less than 16 cubic miles. However, the Chesapeake Bay has a larger watershed, spanning 64,000 square miles compared to the Puget Sound's 13,700 square miles.
The Puget Sound's status as the second-largest estuary in the United States is further complicated by the inclusion of certain waterways in its definition. The USGS defines the Puget Sound as all the waters south of three entrances from the Strait of Juan de Fuca. However, another definition by NOAA includes significant parts of the Strait of Juan de Fuca and the Strait of Georgia in the Puget Sound, expanding its boundaries.
In conclusion, the Puget Sound is a significant estuarine system on the northwest coast of the United States, and its size and depth make it a notable feature in the region. While it is widely considered the second-largest estuary in the United States, the specific definition of the Puget Sound and the methods used to measure estuary size can impact its ranking.
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Puget Sound is part of the Salish Sea
Puget Sound is a complex system of interconnected marine waterways and basins located on the northwest coast of Washington in the United States. It is a part of the Salish Sea, which also includes the Strait of Georgia, the Strait of Juan de Fuca, Desolation Sound, and various other bodies of water. The term "Salish Sea" was first proposed in 1988 by Bert Webber, a professor of geography and environmental social studies, to collectively refer to the waters in the region. The name honours the Coast Salish people, the indigenous people who live in the region along the Salish Sea and share a common linguistic and cultural origin.
The Salish Sea extends across the U.S.-Canada border, with a total surface area of approximately 18,000 square kilometres (6,900 square miles). It has an average depth of 130 metres (430 feet) and reaches a maximum depth of 670 metres (2,200 feet) in Jervis Inlet. The Puget Sound itself has an average depth of 450 feet (140 metres) and a maximum depth of 930 feet (280 metres) off Jefferson Point between Indianola and Kingston.
The boundaries of Puget Sound and the Salish Sea are not always consistently defined by scientists and government agencies. Oceanographers define Puget Sound as including the waters from Admiralty Inlet and Deception Pass to the southern tip of Olympia. However, many management and conservation efforts consider the entire watershed, including the Strait of Juan de Fuca, Hood Canal, and the San Juan Archipelago, as part of the Puget Sound region.
The term "Puget Sound" is also used to refer to the Puget Sound region centred on the sound, which includes major cities such as Seattle, Tacoma, Olympia, and Everett. The Puget Sound is the second-largest estuary in the United States, after Chesapeake Bay in Maryland and Virginia. It was named after Peter Puget, a Huguenot lieutenant who accompanied George Vancouver on the Vancouver Expedition in 1792.
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The term 'Puget Sound' is also used for waters north of Tacoma Narrows
The term "Puget Sound" is also used for waters north of Tacoma Narrows. The term "Puget Sound" is used not just for the body of water but also for the Puget Sound region centred on the sound. The Puget Sound is a complex estuarine system of interconnected marine waterways and basins located on the northwest coast of the US state of Washington. It is part of the Salish Sea, which includes the Strait of Juan de Fuca and the Strait of Georgia. The term "Salish Sea" was established by the United States Board on Geographic Names in 2009 to collectively refer to these waters.
The Puget Sound region includes major cities such as Seattle, Tacoma, Olympia, and Everett. The term "Puget Sound" is sometimes used for waters north of Tacoma Narrows, such as Bellingham Bay and the San Juan Islands region. However, under the USGS definition, Puget Sound specifically refers to the waters south of three entrances from the Strait of Juan de Fuca. The main entrance is Admiralty Inlet, with the other two entrances being Deception Pass and the Swinomish Channel.
The Tacoma Narrows is known for the Tacoma Narrows Bridge, which opened to traffic on July 1, 1940. This bridge was the first of its type to employ plate girders to support the roadbed, and it was the third-longest suspension span in the world at the time. Unfortunately, the bridge collapsed into the Tacoma Narrows on November 7, 1940, possibly due to aeroelastic flutter caused by 42 mph winds. The bridge's collapse had a significant impact on science and engineering, and it is often used as a teaching tool for students in these fields.
The current Tacoma Narrows Bridge, also known as "Sturdy Gertie," was rebuilt with open trusses, stiffening struts, and openings in the roadway to allow wind to pass through. It opened on October 14, 1950, and is 5,979 feet long, making it the fifth-longest suspension bridge in the United States.
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Puget Sound is deeper than Chesapeake Bay
The Puget Sound is a complex system of interconnected marine waterways and basins located on the northwest coast of the U.S. state of Washington. It is part of the Salish Sea and has one major and two minor connections to the Strait of Juan de Fuca, which connects to the Pacific Ocean. The average depth of Puget Sound is 450 feet (140 metres), with a maximum depth of 930 feet (280 metres).
Chesapeake Bay, on the other hand, is located in the states of Maryland and Virginia. It is widely considered the largest estuary in the United States, with Puget Sound often mentioned as the second largest. However, some sources argue that Puget Sound is the largest estuary by volume since it is much deeper than Chesapeake Bay. Chesapeake Bay's deepest point is 174 feet (53 metres), while Puget Sound's maximum depth is almost three times that.
The average depth of Puget Sound is also significantly greater than that of Chesapeake Bay. Puget Sound has an average depth of 230 feet, while Chesapeake Bay's average depth is only 21 feet. In terms of volume, Puget Sound holds approximately 40.3 cubic miles of water, compared to Chesapeake Bay's volume of less than 16 cubic miles.
The difference in depth between the two bodies of water is likely due to their geological histories and the processes that formed them. Puget Sound, like many Alaskan waterways, was carved out by glaciers in ancient times, resulting in its deep basin. Chesapeake Bay, on the other hand, may have different geological characteristics that contribute to its shallower depth.
In summary, while Chesapeake Bay is often regarded as the largest estuary in the United States, Puget Sound is deeper and may even surpass it in terms of volume. The deeper basin of Puget Sound contributes to its larger water volume, despite Chesapeake Bay having a more extensive watershed. These comparisons highlight the unique characteristics of each estuary and their importance as significant bodies of water.
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Frequently asked questions
The average depth of the Puget Sound is 450 feet (140 m) and its maximum depth, off Jefferson Point between Indianola and Kingston, is 930 feet (280 m).
Puget Sound is a complex estuarine system of interconnected marine waterways and basins located on the northwest coast of the U.S. state of Washington.
Yes, the Puget Sound is the second-largest estuary in the United States, after the Chesapeake Bay in Maryland and Virginia.
The average depth of an estuary can vary depending on the specific estuary in question. For example, the average depth of the Puget Sound is 450 feet (140 m), while the average depth of the Cook Inlet is 147 feet, and the average depth of the Chesapeake Bay is 21 feet.



















