27 Mar 2024

Dworshak announces a few changes at Dent Acres Recreation Area

AHSAHKA, Idaho – As the weather warms up, Dworshak Dam would like to make a few announcements concerning Dent Acres Recreation Area.

7 Dec 2023

USACE cautions lake users on low water conditions at Beaver Lake

The U.S. Army Corps of Engineers is cautioning boaters about low water conditions at Beaver Lake.

13 Sep 2023

Apalachicola-Chattahoochee-Flint Reservoir Water Levels Continue Decline

MOBILE, Ala. – U.S. Army Corps of Engineers, Mobile District, water management officials announced today that the reservoir levels at Buford, West Point, and Walter F. George reservoirs on the Chattahoochee River are expected to continue declining over the next 2 weeks.

30 Aug 2022

Legacy Datums and Changes in Benchmark Elevation through Time at the Old River Control Structure, Louisiana

Abstract: Vertical datums used in the study area at the Old River Control Structure in southern Louisiana have involved Memphis Datum, Mean Gulf Level, Mean Sea Level, Mean Sea Level Datum of 1929, National Geodetic Vertical Datum of 1929, and the North American Vertical Datum of 1988. The focus of this study was to examine historic benchmarks in the study area to determine the magnitude of elevation changes associated with the different legacy datums that have been used by the US Army Corps of Engineers. Comparison of elevation values across these legacy datums has involved examining historic hydrographic surveys, compiling a list of known benchmarks from these surveys, and comparing their elevation values against publications involving spirit-leveling surveys from the Lower Mississippi Valley and the National Geodetic Survey database for benchmarks. This study describes the history of legacy datums, floodplain geology at the Old River Control Structure, potential subsidence impacts affecting the benchmarks, methods for identification and tracking benchmarks, and the results obtained from this study.

17 May 2022

Corps of Engineers share May-Oct. water level outlook

U.S. Army Corps of Engineers Hydraulics and Hydrology officials forecast Great Lakes water levels to continue seasonal rise. From the shores of Lake Superior, Detroit District Watershed Hydrology Section Chief Keith Kompoltowicz discusses the latest six-month water level forecast in the seventh ‘On the Level’ video, available on the district’s YouTube page at https://youtu.be/imwYDUBbMd0. “Lake Superior’s water level in April was about an inch below its long-term average,” according to Kompoltowicz. “Looking at the forecast for the next 6 months, Superior’s level should remain near average. In looking at the rest of the Great Lakes system, Lakes Michigan-Huron, St. Clair, Erie and Ontario are above their respective long term average levels, but well below the record high levels recently experienced.”

28 Feb 2022

Corps expects rain event to help fill low reservoirs

Army water managers expect an atmospheric river that’s dumping heavy rain in the Pacific Northwest will help refill some reservoirs this week. U.S. Army Corps of Engineers (Corps) officials anticipate this event will help bring Blue River and Dorena reservoirs up to normal lake levels for this time of year.

9 Feb 2022

Implementation of Flexible Vegetation into CSHORE for Modeling Wave Attenuation

Abstract: This technical report presents the new numerical modeling capabilities for simulating wave attenuation and mean water level changes through flexible vegetation such as smooth cordgrass in coastal and marine wetlands. These capabilities were implemented into the Cross-SHORE (CSHORE) numerical model. The biomechanical properties of vegetation such as dimensions, flexibility, and bending strength are parameterized in terms of the scaling law. Correspondingly, a new formulation of the vegetation drag coefficient, CD, is developed using field data from a salt marsh in Terrebonne Bay, LA, by considering spatially varying effective stem and blade heights of species. This report also presents a general procedure for using the model to simulate hydrodynamic variables (i.e., waves, currents, mean water levels) at vegetated coasts, which are used to quantify the effects of wave attenuation and reduction of surge and runup due to vegetation. Preliminary model validation was conducted by simulating a set of laboratory experiments on synthetic vegetation, which mimicked the flexibility of Spartina alterniflora. The validation results indicate that the newly developed vegetation capabilities enable CSHORE to predict changes of wave heights and water levels through marshes by considering species-specific biomechanical features. The model is also applicable to assess vegetation effectiveness against waves and surges.

8 Feb 2022

Delayed refill at Corps reservoirs to impact boating, recreation

Army water managers will delay refilling Cougar and Fall Creek reservoirs and conduct spill operations at Foster Dam as required by the U.S. District Court for the District of Oregon’s Willamette Valley injunction because of recent litigation. The delay at Cougar and Fall Creek will impact the U.S. Army Corps of Engineers’ (Corps) ability to refill the reservoirs to their normal summer levels, which will impact boating and recreation activities.

28 Jan 2022

Scenarios product provides insight to potential future water levels

DETROIT- Using historical data similar to recent conditions, the U.S. Army Corps of Engineers’ Future Scenarios product illustrates Great Lakes’ water level variabilities. “The tool allows us to investigate the different meteorological or hydrological conditions impacting the Great Lakes basin and how it affects water levels,” said Detroit District Watershed Hydrology Section Physical Scientist Deanna Apps. “You may find this product helpful to better understand the variability in water levels that could occur under certain scenarios.” Apps, who is also a lead water level forecaster explains the scenario-based tool that is publicly available on the Corps of Engineers’ website in the sixth ‘On the Level’ video, available on the Detroit District’s YouTube page at: https://youtu.be/Jyl8RkNBIy0.

1 Dec 2021

Measuring Great Lakes flows helps forecast water levels

DETROIT- Monitoring the amount of water moving through the Great Lakes system is important to help forecast Great Lakes water levels and support international monitoring efforts. U.S. Army Corps of Engineers officials physically measure discharge, or flow, in the connecting channels using acoustic technology. Monthly flow in the connecting channels is the largest contributing factor to the level of each Great Lake and is a critical piece in forecasting Great Lakes water levels. Detroit District Hydraulic Engineer, Matt McClerren demonstrates flow measurement on the Detroit River and how the Corps of Engineers estimates monthly flows the fifth ‘On the Level’ video, available on the district’s website at https://go.usa.gov/xFEWx.