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Caption: The chart shows the depth of the thalweg (deepest portion of the stream) and the water surface in Redwood Creek from the Highway 1 Bridge to about 200 feet upstream of Muir Woods Road Bridge in 1999. Data were collected by Golden Gate National Recreation Area. The elevation is relative and survey markers are used so that locations can be monitored for change in the thalweg depth profile and pool spacing. This information is particularly useful when a data set spanning several years is available.
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