This guidelines manual aids the user in developing plans and operating material sites to minimize environmental effects when mining floodplain gravel in arctic and subarctic locations.

The Mackenzie River Delta channels contain many deep holes, which are due primarily to fluvial scour. There are several possible causes of these holes and possible processes that intensify the features, such as wave action, thermal erosion of permafrost, ice scour, and bank erosion. The proposed natural gas Mackenzie Valley Pipeline would run from Prudhoe Bay, Alaska, into Canada. This report was written for planning of one of the alternate routes, the Cross Delta Route, which would pass through the Mackenzie River Delta to the Richards Island supply line northwest of Tununuk Point and would cross eleven significant channels.

Presents best management practices for placer mining that are designed to minimize nonpoint-source pollution and to promote and enhance the natural recovery of the site. Details the best management practices and includes supporting information behind them.

Presents best management practices for placer mining that are designed to minimize nonpoint-source pollution and to promote and enhance the natural recovery of the site. Gives a summary of the best management practices in a user-oriented format suitable for designing nonpoint-source pollution control features and site rehabilitation features, and for developing mining plans.

The purpose of this study was to gather information to use in a study site for a demonstration project on fisheries habitat modification using mitigation techniques that would be suitable for slough enhancement during operation of the Susitna Hydroelectric Project.