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29 Sep 2020
A First Examination of the Interaction between Alternaria alternantherae and Agasicles hygrophila on Alternanthera philoxeroides
PURPOSE: The use of an alligatorweed (Alternanthera philoxeroides) insect biological control agent, alligatorweed flea beetle (Agasicles hygrophila Selman and Vogt), and the leaf spot plant pathogen, alligatorweed leaf pathogen (Alternaria alternantherae Holcomb and Antonopoulis), may provide enhanced control of alligatorweed infestations if competitive interactions between agents are minimal and damage to host plants are synergistic. However, to assess suitability of co-use of these two agents, it is necessary to first identify whether introduction of one may impact performance of the other. This technical note details a first examination of competitive interactions between A. hygrophila and A. alternantherae under varied temperature and host nutritional conditions. Presented are the results of laboratory experimentation and recommendations for future research.
29 Sep 2020
One lane of Highway 59 across James W. Trimble Lock and Dam to temporarily close
One lane of the Highway 59 bridge across James W. Trimble Lock and Dam will be closed from 8 a.m. until 5 p.m. on Oct. 6 for a routine bridge inspection.
29 Sep 2020
Perry Lake offers off-season camping
The U.S. Army Corps of Engineers at Perry Lake announces the availability of off-season camping at Old Town Park. The 113-acre park is located on the east side of the lake along Kansas State Highway 92, near Perry, Kansas.
29 Sep 2020
Using Unmanned Aircraft System (UAS) and Satellite Imagery to Map Aquatic and Terrestrial Vegetation
Purpose: The purpose of this study is to demonstrate the application potential of using unmanned aerial systems (UAS) combined with a time series of moderately high-resolution satellite imagery for mapping ecological restoration progress and resulting land cover changes. This technical note addresses a project under the US Army Corps of Engineers Ecosystem Management and Restoration Research Project (EMRRP) focusing on image acquisition and assessment, digital image processing techniques, analytical methodology, geospatial product development, and documentation of best practice for future data acquisition and analysis in support of ecological management efforts.
29 Sep 2020
Federal agencies decide the Columbia River System Operations environmental impact statement balances system purposes
The U.S. Army Corps of Engineers, Bureau of Reclamation and Bonneville Power Administration signed a joint Record of Decision on Monday that commits the agencies to implementing immediate and long-term actions related to the ongoing operations, maintenance and configuration of 14 federal dams that compose the Columbia River System.
29 Sep 2020
U.S. Attorney’s Office settles lawsuit with Chicago auto dealership over alleged pollution in Chicago River
Sept. 23, 2020, the U.S. Attorney’s Office for the Northern District of Illinois announced that it reached a settlement with a Chicago auto dealership to resolve claims that it discharged pollutants into the Chicago River and created a hazardous obstruction to navigation.
29 Sep 2020
Corps of Engineers begins construction at Holmes Lake
The U.S. Army Corps of Engineers is modifying a portion of the dam embankment at Salt Creek Dam Site 17, commonly referred to as Holmes Lake in Lincoln, Nebraska.
29 Sep 2020
MacAllister builds relationships while battling pathogens in the Czech Republic
When Irene MacAllister learned the Deputy Assistant Secretary of the Army (DASA) for Defense Exports and Cooperation (DE&C) was searching for potential candidates with expertise in immunology, microbiology, proteomics, gene editing and bioinformatics who were interested in a 12-month assignment to the Czech Republic, she jumped at the chance.
29 Sep 2020
Construction of $126 million Intelligence Production Center at WPAFB begins third, final and largest contract led by Louisville District
The U.S. Army Corps of Engineers Louisville District has the privilege to oversee the construction
28 Sep 2020
LA District park rangers focus on community outreach for 2020 National Public Lands Day
This year presented unique challenges to federal agencies looking to engage the public in participating in National Public Lands Day, but U.S. Army Corps of Engineers districts were able to adapt using virtual and in-person outreach events with COVID-19 safety precautions in place.