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  • USACE accepting bids for first phase of Port of Nome project construction

    Beginning February 28, 2025, the U.S. Army Corps of Engineers – Alaska District is soliciting contractor bids for the first phase of construction for the Port of Nome Modification Project in Nome, Alaska.
  • Assessing the Validity and Accuracy of Wetland Indicator Status Ratings for Eight Species in Alaska Subregions

    Abstract: Preexisting ecological information and plant species occurrence data were used to determine the accuracy and validity of the present regional and subregional wetland indicator status ratings for eight species: Andromeda polifolia, Arctous rubra, Carex canescens, Rhododendron tomentosum, Rubus arcticus, Salix arctica, Salix pulchra, and Viola palustris. Technical documentation was developed to either (1) support the current National Wetland Plant List (NWPL) subregion boundaries and wetland indicator status ratings for the NWPL Alaska Region or (2) support a proposed change to the subregions or wetland indicator status ratings for the NWPL Alaska Region, for inclusion into the next NWPL update. The project developed repeatable, quantitative methods for assignment of wetland indicator status rating. Analyses included multiple correspondence analysis (MCA), analysis of similarities (ANOSIM), nonmetric multidimensional scaling (NMDS), and principal component analysis (PCA). Prevalence index (PI) was used as a numeric approximation of wetland status for comparing observations across subregions. A pilot study on S. pulchra data evaluated regional assignments by machine learning and assessed the feasibility of correlation network analysis and Louvain clustering for wetland indicator status rating assignment as dictated by co-occurring species. The methods developed for this Alaska-specific study may be applied to any future regional or subregional updates to the NWPL.
  • ERDC researchers discovering hidden caves in Alaska

    The U.S. Army Engineer Research Development Center's (ERDC) Construction Engineering Research Laboratory (CERL) is leading a study alongside the University of Alabama in Huntsville (UAH) and the U.S. Forest Service (USFS) to document cave biodiversity in the TNF and explore how these unique subterranean communities are connected using molecular genetic tools.
  • USACE staff observe dam infrastructure in Switzerland in preparation for tunnel project in Alaska

    Staff from the U.S. Army Corps of Engineers – Alaska District toured dam infrastructure in the heart of the rugged Swiss Alps as part of a temporary duty trip. After cataloguing their findings abroad, the team returned to Alaska with a renewed perspective for the improvement of the Lowell Creek Flood Diversion project set in similar mountains near Seward.
  • Permafrost and Groundwater Characterization at the Proximity of the Landfill, Fort Wainwright, Alaska

    Abstract: This report summarizes a site investigation at the vicinity of the landfill, a discontinuous permafrost site, at Fort Wainwright, Alaska. The objective of this effort was to characterize the permafrost extent and groundwater flow at the study area, and to compare newly collected subsurface characteristics with historical datasets. The main tasks for this effort included lidar and remote sensing analyses, geophysical investigations, a tracer dye study, contaminant trend analysis, and installation of soil temperature sensors. Findings included changes in stream channels and watershed boundaries, and elevation losses (0.2 m to 1 m) east and northeast of the landfill. From frost probe measurements, we found that depths to permafrost were up to 1.5 m deeper in 2021 than in 2010 where the difference in depth ranged from 20% to more than 350%. Furthermore, we detected a reduction in lateral permafrost extent from geophysical datasets. The groundwater flow direction, as detected through the dye study, was south to southwest. Dye was detected up to 2,300 m from the injection point. Groundwater travel times, as calculated from the dye study, varied greatly. For upcoming historical comparisons, it is recommended that data collections are performed using similar methods as described in this study.
  • U.S. Army Corps of Engineers Issues IPOP Project Permit

    Today, the U.S. Army Corps of Engineers Pacific Ocean Division announced that it has issued a permit to IPOP, LLC to dredge and dispose of material in U.S. waters near Nome, Alaska.
  • Infrastructure law helps to dredge Petersburg Harbor for first time in 42 years

    Located in Southeast Alaska between Juneau and Ketchikan, the Petersburg Navigation Improvements project restored the Petersburg Borough’s South Harbor to original design depths ranging from minus 9 to 19 feet and improved general navigation features to allow for safe passage of vessels. The first ever dredging operation within the basin since it was built in 1982 removed about 57,000 cubic yards of material.
  • Infrastructure law helps to dredge Petersburg Harbor for first time in 42 years

    Located in Southeast Alaska between Juneau and Ketchikan, the Petersburg Navigation Improvements project restored the Petersburg Borough’s South Harbor to original design depths ranging from minus 9 to 19 feet and improved general navigation features to allow for safe passage of vessels. The first ever dredging operation within the basin since it was built in 1982 removed about 57,000 cubic yards of material.
  • District awards contract for Kenai coastal erosion project

    The U.S. Army Corps of Engineers – Alaska District awarded a construction contract for the Kenai River Bluffs Erosion Project. Western Marine Construction of Seattle, Washington, will construct a protective rock berm approximately 5,000 feet in length along the north bank of the Kenai River. It will require the placement of about 42,400 cubic yards of armor rock; 33,200 cubic yards of crushed rock and 13,100 cubic yards of gravel base. Funded by the Bipartisan Infrastructure Law, this construction contract award is valued at about $19.3 million.
  • Alaska District to begin major infrastructure projects in 2024, emphasis on best small business practices

    The Alaska District is preparing for a productive 2024 construction season in the Last Frontier. The organization's robust workload includes major infrastructure construction efforts under the district's civil and military programs in every corner of the state.