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  • MKARNS Nav Notice SWL 25-58 Safety Zone Military Exercise NM 289.0 – NM 292.8

    To ensure the safety of life and property during the military river crossing exercise, a Safety Zone will be established by the U.S. Coast Guard for the Arkansas River from NM 289.0 to NM 292.8.

  • USACE works to fix stuck gate at Dardanelle Lock and Dam

    Teams with the U.S. Army Corps of Engineers are working to repair a stuck spillway gate at Dardanelle Lock and Dam on the Arkansas River.

  • MKARNS Nav Notice 25-59 Lock 10 Unscheduled Closure

    Dardanelle Lock (No. 10) NM 205.5 is currently closed to traffic due to dangerous cross currents downstream of the dam. The spillway release configuration is currently restricted due to mechanical issues resulting in concentrated flows that present a danger to traffic in the downstream approach. Crews are onsite and an additional notice will be submitted when the issue is resolved.

  • Army Corps shares update on Francis E. Walter Dam water release schedule

    PHILADELPHIA (August 21, 2025) – The U.S. Army Corps Engineers’ Philadelphia District updated the 2025 Francis E. Walter Dam recreation plan.

  • McNary Lock and Dam Gets a Roadway Refresh: Expect Closures

    UMATILLA, Ore. – The U.S. Army Corps of Engineers, Walla Walla District, in partnership with MacNak Construction LLC, will begin reconstructing portions of 3rd Street and Scaplehorn Road near McNary Lock and Dam on Monday, Aug. 25.

  • Dworshak Dam Announces Seasonal Visitor Center Hours Change, Safety Reminders

    AHSAHKA, Idaho – As the summer recreation season winds down, the Dworshak Dam and Reservoir Visitor Center has adjusted its hours of operation.

  • SWG Champion Earns USACE Engineer of the Year Honors

    Dr. Mohammad “Shahidul” Islam, Ph.D., P.E., BCWRE, a subject matter expert in the Hydrology & Hydraulic Branch of the U.S. Army Corps of Engineers (USACE) Galveston District, has been named Engineer of the Year for the USACE Hydrology, Hydraulics & Coastal Community of Practice (HH&C CoP) for Fiscal Year 2025.

  • Parameterized Statistical Distributions of Unique Origin-Destination Pairs for Major Waterborne Commodity Groups

    Abstract: Modeling the spatiotemporal aspects of freight movements within a distributed network is crucial to forecasting transportation infrastructure needs, prioritizing investments, and estimating emissions. Commodity flow patterns and trends along the inland waterway transportation system are significant because of their importance for the economy, in line with priorities of the US Committee on the Marine Transportation System. Analyzing these inland waterway flows better informs multimodal freight transportation modeling. This exploratory research uncovers, describes, and summarizes patterns and trends of the US waterway transportation system by mining waterborne freight data. The purpose of this work is to identify parameterized statistical distributions that describe the relative dispersion of unique waterborne Origin-Destination (OD) pairs when sorted high to low by annual freight tonnage. Best-fit statistical distributions and associated parameters are identified for the leading commodities transported on waterways, and an 11-year time-series analysis of commodity-specific distribution parameters provide their evolution across time. Results show that the power law best explains the distribution of ranked ODs by tonnage for seven of the twelve commodities analyzed. The root-mean-square error (RMSE) of any given commodity modeled is less than 1%. These results provide insights into the underlying behavior of inland waterway freight transportation.

  • Gremlin Cove Boat Ramp closed due to low water and sediment buildup at Harlan County Lake

    In response to declining lake levels and heavy sediment accumulation, officials at Harlan County Lake have temporarily closed the Gremlin Cove Boat Ramp, effective immediately. This is the largest and most frequently used boat ramp on the lake, and the closure will also impact access to the North Shore Marina.

  • Examining the Impact of the 2007 Zaca Fire on the Long-Term Hydrological Recovery of the Santa Cruz Creek Watershed in Southern California

    Abstract: This study focuses on the Santa Cruz Creek watershed in Southern California, an area severely impacted by the 2007 Zaca Fire. The region is representative of wildfire-prone Mediterranean-climate catchments. We assess long-term post-fire hydrological recovery using a novel dual approach: (1) simulating 16 storm events over a 23-year period to evaluate pre-fire, post-fire, and recovery conditions, and (2) directly comparing two similar storm events—one pre-fire and one during recovery—to isolate changes in watershed response. Hydrological modeling employed HEC-HMS with the Deficit and Constant Loss Method, the ModClark Transform Model, and the Linear Reservoir Baseflow Model. Remote sensing data, including Enhanced Vegetation Index and SERVES Soil Moisture, enhanced modeling and analysis. Vegetation cover, soil moisture, and several watershed parameters show substantial recovery after five years. EVI reached 84 % of pre-fire values, while initial soil moisture deficit, time of concentration, and storage coefficient each recovered to roughly 70 %. Fast baseflow exceeded pre-fire levels at 143 %, but slow baseflow declined to 20 %. Peak discharge and direct runoff volume declined from post-fire highs of 173 % and 136 % to 125 % and 84 % of pre-fire levels, respectively. Although vegetative conditions stabilize, watershed hydrology remains altered.