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 You selected the area Geyserville and the topic Habitat: Maximum Pool Depths Russian R. in Alexander Valley 1992  
This map shows the unit-level results of a July and August 1992 habitat typing survey of the Russian River in the Alexander Valley reach. Pool Units are color-coded by maximum depth. Of the 51 pools measured, only 1 was 8 feet deep. The surveyed reach extends from the confluence of Big Sulphur Springs to the intersection of the mainstem and the Alexander Valley Bridge. Data were collected by Circuit Rider Productions. Scale = 1:126,547 .