Commander & Director, U.S. Army Engineer Waterways Experiment Station, ATTN: CEWES-CT-C, P.O. Box 631, Vicksburg, MS 39180-6199

A -- LARGE SCALE DOLOS PHYSICAL MODEL STUDY, OSU POC Sandy Staggs, 601-634-3698 The USAE Waterways Experiment Station (WES) proposes to award a contract to Oregon State University for providing all necessary personnel and equipment to furnish and operate the large wave tank (LWT) and collect a high density, high quality data set on CORE-LOC and CORE-LOC/dolos matrix hydrodynamic stability response and associated hydrodynamics in a controlled laboratory environment. The contract period will be six months. The goal of the project is to obtain a comprehensive set of data, in a controlled environment at a large scale, to be used to validate scaling parameters for CORE-LOC, and to be used to develop design guidance for both new CORE-LOC structures and repair of existing dolos armor layers using CORE-LOC. The only known source capable of performing this work, within the United States, is Oregon State University, Corvallis, Oregon where the LWT is located. This unique LWT is operational and is available to perform large scale hydraulic stability studies (irregular wave heights up to 1.5 meters, and wave periods in excess of 10 seconds). This large scale is required for validating scaling, investigating the effect of high friction prototype concrete on porosity and stability. It will be used as a basis for developing CORE-LOC construction and design guidance under the scope of the research work performed at the Coastal Engineering Research Center. In the event no other sources are found, the U.S. Government intends to award a contract to Oregon State University under the authority of 10 U.S.C. 2304 (c)(1). Solicitation documents are not available. Any inquires should be received within 15 days of this notice. See numbered Note 22. (0089)

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