10 Jun 2020

Army Corps announces upcoming lane closures on SR-1 Bridge in Delaware

The U.S. Army Corps of Engineers’ Philadelphia District will be conducting concrete deck repairs on the Senator William V. Roth, Jr. Bridge (SR-1) in Delaware beginning July 6th and ending in late August. The repair work will require single lane closures.

10 Jun 2020

Pipestem Reservoir reaches expected summer release

Reservoir releases are being increased from Pipestem Dam to its expected summer release. The current pool elevation at Pipestem Dam is 1478.5 feet, almost 51% into its flood pool. Lake levels peaked this year on June 3 at 1479.4 feet, almost 53% into its flood pool. Today, releases are being increased from 450 cubic feet per second to 550 cfs. This release is expected to stay constant for the remainder of the summer. The target date for flood control evacuation at Pipestem Dam is Sept. 1.

10 Jun 2020

Pipestem Reservoir reaches expected summer release

Reservoir releases are being increased from Pipestem Dam to its expected summer release. The current pool elevation at Pipestem Dam is 1478.5 feet, almost 51% into its flood pool. Lake levels peaked this year on June 3 at 1479.4 feet, almost 53% into its flood pool. Today, releases are being increased from 450 cubic feet per second to 550 cfs. This release is expected to stay constant for the remainder of the summer. The target date for flood control evacuation at Pipestem Dam is Sept. 1.

10 Jun 2020

Corps to open Lock and Dam 14 Auxiliary Lock and modify zone designation in the LeClaire Canal

The U.S. Army Corps of Engineers, Mississippi River Project will open the Locks and Dam 14 auxiliary lock in Pleasant Valley, Iowa, for weekend recreational boating traffic beginning June 12 and running through Sept. 7.

10 Jun 2020

Corps of Engineers begins repairs to Lock and Dam 10 lockmaster house

ST. PAUL, Minn. – The U.S. Army Corps of Engineers, St. Paul District, is repairing its lockmaster house at Lock and Dam 10, in Guttenberg, Iowa.

10 Jun 2020

Corps of Engineers urges lake visitors to watch for algae blooms

KANSAS CITY, Mo. –The U.S. Army Corps of Engineers, Kansas City District is actively responding to a potentially toxic blue-green algae blooms at several lakes with site-specific sampling and posting public health advisory signs at lakes as recommended by state health agencies.

10 Jun 2020

PUBLICATION NOTICE: Nearshore Placement Workshop 2019: Sediment Nourishment of the Nearshore Environment

Abstract: The Coastal Inlets Research Program and the Regional Sediment Management Program co-sponsored the 2019 Nearshore Placement Workshop. Thirty-four participants from the US Army Engineer Research and Development Center (ERDC) and numerous districts met in Vicksburg on January 29–30, 2019, as a part of the workshop. This workshop was convened to facilitate discussions on concerns districts face regarding nearshore placements from resource agencies and stakeholders, challenges to placing sediment in the nearshore, and future research needs. The workshop included ERDC presentations on the state of the science regarding nearshore placements; specific implementations of nearshore placements within various US Army Corps of Engineers districts; break-out-style discussions on nearshore placement challenges and potential paths forward; and group discussions on metrics for success, quantification of benefits, Statements of Need (SON), and research priorities. A few of the major recurring themes throughout the workshop were the importance of monitoring, concerns over the fate of fine-grained sediment, and difficulties conveying the benefits of nearshore placements to a wide range of audiences. The workshop culminated in a discussion of possible SON to be put forth to the ERDC research and development community. This special report describes the discussions and outcomes of the 2019 Nearshore Placement Workshop.

10 Jun 2020

NR 20-018: Nashville District beaches, picnic shelters in Tennessee reopening June 12

NASHVILLE, Tenn. (June 10, 2020) – As part of a phased approach for reopening recreation facilities following COVID-19 closures, the U.S. Army Corps of Engineers Nashville District is opening additional Corps-managed day use recreation areas and amenities on June 12, 2020.

10 Jun 2020

PUBLICATION NOTICE: Projecting Changes in Food Security Throughout Central America

Abstract: Climate non-stationarity continues to change the productivity of local food and water supply. These changes in supplies could result in starvation or surpluses, greatly affecting the surrounding populations and causing adverse effects such as malnutrition, mass migration, and political unrest. This study addresses the following questions regarding the future potential of land resources to support local populations with food and water: How will crop production be affected by changing environmental conditions? Which specific regions are expected to experience the greatest pressure? How might we expect land use to shift through the end of the 21st century, based on future environmental conditions? Current crop growth is analyzed, along with projected crop growth based on future climate scenarios. Recent historic anthropogenic biome maps are statistically correlated with recent historic climate data to generate models and are applied to anticipated future climates to generate future anthrome maps. The crop analysis is then coupled with the anthromes results, yielding a crop suitability forecast. This analysis is constrained to the area of Central America over the course of the 21st century for this study.

10 Jun 2020

PUBLICATION NOTICE: Full-Scale Testing of Commercially Available Cementitious Backfill and Surface Capping Materials for Crater Repairs

Abstract: The Air Force Civil Engineer Center (AFCEC) Rapid Airfield Damage Recovery (RADR) program currently utilizes rapid-setting flowable fill (RSFF) and rapid-setting concrete (RSC) for backfilling and capping crater repairs. These materials have been proven successful through many full-scale tests, troop demonstrations, and live flight trafficking. However, only one proprietary product is currently approved for each material. Two candidate capping materials and one backfill material were evaluated by conducting simulated crater repairs and collecting appropriate data. For capping products, both small (8.5 ft x 8.5 ft) and large (15 ft x 15 ft) repairs were conducted and trafficked with simulated F-15E aircraft traffic. For the backfill material, three small repairs were backfilled and the California Bearing Ratio (CBR) was estimated at cure times of 0.5, 2, and 24 hr. Overall, repairs capped with Western Materials Fastrac 246 failed after only 2,000 passes, so the material is not currently recommended for approval. Repairs capped with Buzzi Unicem Ulti-Pave3® were able to sustain 3,500 passes before trafficking was ceased, so this material is recommended for approval as a crater repair capping material. CTS rapid-setting flowable fill backfill exhibited lower than expected CBR values and did not allow timely percolation of mix water, so it is not currently recommended for approval at this time.