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Title: Sediment budget for the Indiana shore from Michigan City Harbor to Burns Waterway Harbor
Authors: Morang, Andrew, 1953-
Frey, Ashley E.
Bucaro, David F.
Brodzinsky, Sara K.
Fuller, Jeff A.
Keywords: Aerial photography
Beach profiles
Burns waterway harbor
Lake Michigan
Michigan city harbor
Sediment budget
Sediment volumes
Shoreline mapping
Regional Sediment Management Program (U.S.)
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (Engineer Research and Development Center (U.S.)) ; no.ERDC/CHL TR-12-17
Abstract: Net sediment transport in the littoral cell extending from Michigan City Harbor to Burns Waterway Harbor, IN, is from east to west. For the four decades following construction of the harbor (approximately 1966-2010),net littoral transport averaged about 194,000 yd3/year (115,000 + 79,000). Of this amount, accumulation in the fillet east of the Arcelor-Mittal (formerly Bethlehem Steel) bulkhead was about 115,000 yd3/year. These results are based on analysis of cross-shore beach profiles, reprocessed from paper records and electronic files. Dredging from the NIPSCO Bailly Generating Station cooling water intake was 79,000 yd3/year (2,366,000 yd3 ÷ 30 years). The total transport calculated in this study is higher than most published previous estimates. The volume of sediment now bypassing the lakeward end of the bulkhead and entering the Federal harbor is estimated to be 86,000 yd3/year. This value is based on the proportion of the active zone beyond the lakeward (northern) end of the Arcelor-Mittal bulkhead (194,000 × 0.443). This value will have to be confirmed with dredging statistics in the future. A ship grounding in April, 2012, demonstrated that the approach channel east of Burns Waterway Harbor is significantly shallower than shown on hydrographic charts. This supports the hypothesis that significant sand is bypassing the lakeward end of the Arcelor-Mittal bulkhead rather than being trapped in the fillet. An average of 73,000 yd3/year of sand has been placed west of Portage/Burns Waterway (Burns Ditch)(1,829,000 total from both the fillet and the Portage/Burns Waterway ÷ 25 years). Most sand has been placed in shallow water offshore of the town of Ogden Dunes, and some was placed directly on the beach at the National Park Service Portage Lakefront Park property. Full bypassing needs to be about three times this amount if it is to match the longshore transport value of 194,000 yd3/year.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-12-17
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Technical Report
Technical Report

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