Originally published as EPA-600/3-79-109. "This paper was originally published as EPA Report EPA-800/3-79-109, October 1979. This revision contains minor modifications and considerable data additions." "This paper is a product of a conference at Geleneden, Oregon, June 4-5, 1979, to discuss and rewrite a white paper originally prepared by Shirazi and Seim on development of a united approach for evaluation of spawning habitat."--Page 33. Includes bibliographical references (pages 51-52).

As a result of silvicultural activities in the Pacific Northwest, various levels of sediments and debris enter the streams, often degrading spawning substrate of salmonid fishes. Simple but reliable procedures are needed to monitor spawning gravels to assess the level of these impacts. This paper presents a preliminary rationale for conducting a monitoring program with the objective of assessing the level of sedimentation impact both locally in a given stream spawning site as well as more generally for the entire stream that might be impacted by watershed management activities.