This technical appendix documents work preformed in the preparation of preliminary enigineering designs, cost estimates and other related work for modifications to the Federal commercial navigation project at Lorain Harbor, Ohio. The document work is part of a 'Preliminary Feasibility Report' for commercial navigation improvements to Lorain Harbor being prepared by the Buffalo District, U.S. Army Corps of Engineers. The purpose of this report is to clearly document the engineering analysis,...
Topics: DTIC Archive, CORPS OF ENGINEERS BUFFALO NY BUFFALO DISTRICT, *HARBORS, MODIFICATION, OHIO, RIVERS,...
Investigators participated within the planning phase of the Tidal Flats Department Research Initiative (DRI) to help design and site a series of large collaborative field experiments. The work included meetings and field trips to characterize potential sites, as well as logistical concerns. Emphasis was on integrating remote (infrared imagery) and in situ (thermistor) field sensing of thermal signals into the experiment plan. Investigators attended DRI planning meetings in Hawaii and South...
Topics: DTIC Archive, Thomson, Jim, WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB, *COASTAL REGIONS, *THERMAL...
The San Timoteo Creek, located in southern California, is a tributary of the Santa Ana River and drains portions of the San Bernardino and Riverside Counties. The existing creek has the capacity to protect the surrounding community from approximately a 20-year-frequency flood. The proposed channel improvements will provide a 100-year level of protection. The proposed channel design within the reach studied includes a sediment basin, a concrete weir followed by a converging sidewall chute, a...
Topics: DTIC Archive, Stockstil, Richard L, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS...
Southwest Pass of the Mississippi River, where it meets the Gulf of Mexico, was modeled using a three-dimensional numerical model as a part of an extensive testing program to determine the effects of deeping the Mississippi River navigation channel. The three-dimensional finite element model, RMA-10, was used to duplicate the complex salinity and velocity conditions experienced at the Mississippi River entrance.
Topics: DTIC Archive, Richards, David R, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS...
The Brazos Santiago Inlet (BSI), located at the southern end of Laguna Madre, is a key part of the federal deep-draft Brownsville Ship Channel extending from the Gulf of Mexico to the Port of Brownsville, TX. As part of the Monitoring Completed Navigation Projects program, the focus of this study was to understand the shoaling process in the BSI and to suggest sand management alternatives to reduce inlet maintenance dredging costs. Hydrodynamics and sediment transport were examined for the BSI...
Topics: DTIC Archive, King,David Jr B, ERDC-CHL Vicksburg United States, Hydrodynamics, Mathematical...
A numerical hydrodynamic study was conducted to compare multiple levee setback alternatives to the base condition (levee without setbacks). The models developed for this study are hypothetical. An unsteady unit hydrograph representing a flood wave was used to perform the simulations. The levee setback alternatives show a reduction in water surface elevation upstream of and at the setback area when compared with the base condition. The overland water velocity increases upstream of the setback...
Topics: DTIC Archive, Echevarria-Doyle,Waleska, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS...
Between routine navigation dredging operations, the Atchafalaya River Bar Channel (ABC) traps fluid mud, which begins to consolidate. The consolidated mud can begin to block the passage of vessels using the Port of Morgan City, LA. If the mud densities and yield stresses could be kept sufficiently low so that vessels could safely navigate through it, the length of time between navigation dredging could potentially be increased. To demonstrate the feasibility of dragging a large object through...
Topics: DTIC Archive, Tubman,Michael, ERDC-CHL Vicksburg United States, navigation, coastal engineering,...
Ice in navigation channels and around structures can cause significant damage that requires expensive repairs. This damage can also trigger delays that have the potential to disrupt the entire navigation system, well beyond the reach of the stretches of water directly impacted by ice. One example is upstream of Melvin Price Lock and Dam where ice-induced scour was repaired at a cost in excess of $1,000,000 and the scour hole reappeared within a year of the repair. Therefore, this report...
Topics: DTIC Archive, Carr,Meredith L, ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH HANOVER United...
The purpose of this U.S. Army Corps of Engineers (USACE) Regional Sediment Management Technical Note (RSM-TN) is to document the development of a regional sediment budget and to investigate design alternatives to reduce shoaling in the lower Matagorda Ship Channel (MSC). This RSM-TN focuses on the MSC between channel Station 10+000 and Station 60+000 as well as the Gulf Intracoastal Waterway (GIWW) immediately adjacent to the MSC where the two waterways intersect (Figure 1). Placement Areas...
Topics: DTIC Archive, Wood,Eric, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG United...
The 2015 Charleston Harbor, SC, final feasibility study (USACE 2015) presents results of analyses of proposed modifications to the existing navigation system. The improvements would deepen the Entrance Channel from -47 feet (ft) mean lower low water (mllw) to -54 ft mllw. The dredged material is estimated to be 80 sand and does not meet U.S. Army Corps of Engineers guidelines for beach placement. Instead of disposing in the Ocean Dredged Material Disposal Site, nearshore placement is considered...
Topics: DTIC Archive, Kashlan,Layla R, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG,...
The U.S. Army Corps of Engineers (USACE) Dredging Operations and Environmental Research (DOER) Program, in conjunction with the Monitoring Completed Navigation Projects (MCNP) program, is conducting research and development activities aimed at implementing the practice of using nautical depth to manage navigation channels in the United States containing fluid mud. In these waterways, compared to those with more consolidated bottom materials (e.g., sand), determining where the bottom actually...
Topics: DTIC Archive, Welp,Timothy L, U.S. Army Corps of Engineers Vicksburg United States, depth, CHANNELS...
The 2015 Charleston Harbor, SC, final feasibility study (USACE 2015) presents results of analyses of proposed modifications to the existing navigation system. The improvements would deepen the Entrance Channel from -47 feet (ft) mean lower low water (mllw) to -54 ft mllw. The dredged material is estimated to be 80% sand and does not meet U.S. Army Corps of Engineers guidelines for beach placement. Instead of disposing in the Ocean Dredged Material Disposal Site, nearshore placement is...
Topics: DTIC Archive, Kashlan,Layla R, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG...
This work presents a method for extracting vessel arrival times and arrival processes from Automatic Identification System (AIS) data. This work employs the methodology presented by Mitchell and Scully (2014) for inferring tidal elevation at the time of vessel movement and calculating the tidal dependence (TD) parameter to 23 U.S. port areas for the years 20122014. Tidal prediction stations and observation reference lines are catalogued for considered ports. AIS data obtained from the U.S....
Topics: DTIC Archive, Scully,Brandan, U.S. Army Engineer Research and Development Center Vicksburg United...
This work presents a method for extracting vessel arrival times and arrival processes from Automatic Identification System (AIS) data. This work employs the methodology presented by Mitchell and Scully (2014) for inferring tidal elevation at the time of vessel movement and calculating the tidal dependence (TD) parameter to 23 U.S. port areas for the years 20122014. Tidal prediction stations and observation reference lines are catalogued for considered ports. AIS data obtained from the U.S....
Topics: DTIC Archive, Scully,Brandan M, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG...
This report documents numerical wave and flow modeling for stabilizing a shallow draft navigation channel and adjacent shorelines at Rhodes Point, located on Smith Island, Maryland, in Chesapeake Bay. The U.S. Army Engineer District, Baltimore (CENAB), maintains the channel and is considering structures to protect the western entrance of the channel on Chesapeake Bay side to reduce erosion of shorelines by armoring and stabilizing the channel. The U.S. Army Engineer Research and Development...
Topics: DTIC Archive, Demirbilek,Zeki, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG,...
A 2.5-day interagency workshop attended by river scientists and engineers was held in Cape Girardeau, MO, from 10-12 January 2011. The goal of the workshop was to develop conceptual models (CMs) to guide side channel restoration planning for the Middle Mississippi River. Side channels support a wide range of ecological processes, functions, and biota in large river systems like the Middle Mississippi. Conceptual models are needed to link the physical, chemical, climatic, and human factors...
Topics: DTIC Archive, Nestler,John M, Environmental Laboratory, U.S. Army Engineer Research and Development...
Numerical wave and flow modeling studies were conducted to evaluate modifications to improve navigation at Hilo Harbor, HI. Analysis of field data, hydrographic surveys, and numerical and ship simulation modeling calculations are described in this report. The existing mooring and turning basin area adjacent to the Federal channel cannot safely accommodate the size of vessels presently using the harbor. A second issue affecting navigation in Hilo Harbor is the surge problem, which occurs mostly...
Topics: DTIC Archive, Demirbilek,Zeki, U.S. Army Engineer Research and Development Center Vicksburg United...
This Coastal and Hydraulics Engineering Technical Note (CHETN) describes the history of ebb shoal morphology at Longboat Pass, Manatee County, FL, based on a review of the history and the recent inlet management studies for proposed navigational dredging of the Pass. The study area is located on the southwest Gulf of Mexico coast of Florida (Figure 1). The goals of the study were to determine the best channel configuration for navigation and most appropriate beneficial use of dredged sediments...
Topics: DTIC Archive, Legault,Kelly R, U.S. Army Engineer Research and Development Center Vicksburg United...
This U.S. Army Corps of Engineers (USACE), Engineer Research and Development Center (ERDC), Dredging Operations and Environmental Research (DOER) Program technical note (TN) explains processes that contribute to infilling of channels and basins in coastal regions where salt water and fresh water mix. It briefly discusses methods to reduce this infilling. Future activities of this DOER research task will identify connections between infilling mechanisms and forcing data. This will aid in...
Topics: DTIC Archive, Coe,Lauren, U.S. Army Engineer Research and Development Center Vicksburg United...
This technical report provides a description of Regional Sediment Management (RSM) investigations performed by the U.S. Army Corps of Engineers, Jacksonville District, along Floridas northeast coast in Nassau and Duval Counties. Provided first is an overview of the study area, including previous RSM activities, pertinent studies, and stakeholder discussions. Next is a discussion of the various Federal projects in the study area, including authorization, funding, and permitting. Finally,...
Topics: DTIC Archive, Hodgens,Kevin C, U.S. Army Engineer District, Jacksonville Jacksonville United...
The purpose of this paper is to explain briefly the use of a certain equation which will allow us to compute the velocity Vm when the dimensions of the inlet and its bay, together with the tidal range of the outside sea, are known. No attempt will be made to derive the equation other than to point out that it is obtained by eliminating a single variable between two equations which have been previously derived by Colonel Earl I. Brown in a paper entitled Inlets on Sandy Coasts in the Proceedings...
Topics: DTIC Archive, Escoffier,Francis F, United States Engineer Office Mobile United States,...
The Coastal Inlets Research Program (CIRP) is a R and D Program funded through the Operations and Maintenance (O and M) funding. The CIRP mission is to develop tools and methodologies to reduce O and M costs at coastal navigation projects, including inlets, entrances, ports, navigation structures, channels, and adjacent beaches. PC- and web-based products are provided for District engineers and scientists to rapidly evaluate O and M alternatives.
Topics: DTIC Archive, Rosati,Julie D, U.S. Army Engineer Research and Development Center Viclsburg United...
This Coastal and Hydraulics Engineering Technical Note (CHETN) describes channel shoaling analysis performed at Brazos Island Harbor (BIH) Inlet, TX. The BIH entrance channel has experienced increased frequency of shoaling in recent years that has resulted in draft restrictions. The cause of the increased shoaling is being investigated by the Brazos Island Harbor Channel Shoaling Project as part of the U.S. Army Corps of Engineers (USACE) Monitoring Completed Navigation Projects (MCNP) Program....
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The objective of this project is to determine the characteristics of intermittent and ephemeral streams and develop a stream hydrogeomorphic classification incorporating key physical process drivers that create and support riverine and riparian landforms, hydrologic regimes, and biota. We hypothesized that differences in channel planform, lateral confinement, and boundary materials would produce distinctive physical environments and biotic patterns in ephemeral stream networks. We outlined five...
Topics: DTIC Archive, Cooper,David, Colorado State University Fort Collins United States, Streams, Runoff,...
The Chicago Ship and Sanitary Canal (CSSC) is a navigable channel that connects Lake Michigan to the Mississippi River Basin. Electric barrier systems have been constructed to create waterborne electric fields within the CSSC to prevent Asian carp from swimming from the Mississippi River basin through the canal into the Great Lakes. A laboratory study was conducted to determine which characteristics of the waterborne electric fields of pulsed direct current (pulsed DC) are effective at...
Topics: DTIC Archive, ARMY ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS AQUATIC NUISANCE SPECIES...
The narrow jetty configuration of Tillamook Inlet functions to constrict tidal flow, increase current speed, and prevent sediment deposition. However, the interaction of strong currents with incoming ocean waves over the inlets ebb shoal can amplify and complicate the wave environment at the inlet entrance. In this study, the Coastal Modeling System (CMS) was used to investigate time- and space-varying wave and current conditions affecting boating operations at Tillamook Inlet and quantify the...
Topics: DTIC Archive, Li,Honghai, Army Engineer Research and Development Center Vicksburg United States,...
This report documents an investigation of sediment diversions at the Old River Control Complex (ORCC) conducted for the U. S. Army Engineer District, New Orleans. The investigation was conducted via a combination of field data collection and laboratory analysis, geomorphic assessments, and numerical modeling. The objectives were to determine current rates of sediment diversion, evaluate potential impacts on the stability of the Mississippi River, and identify options to increase sediment...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
This report documents numerical wave and flow modeling for evaluation of the jetties on a shallow draft navigation channel on Tangier Island, VA, located in Chesapeake Bay. Because it is heavily used by the local fishing fleet, the U.S. Army Engineer District, Norfolk (CENAO) maintains the Tangier Island boat canal. CENAO is considering the construction of structures to protect the western entrance of the channel and reduce the wave energy in the lee of the structures, and asked the U.S. Army...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The Monitoring Completed Navigation Projects (MCNP) program evaluates the performance of civil works navigation projects to advance coastal and hydraulic engineering technology and guidance. Monitoring is designed to understand how well projects are achieving their design goals to ultimately develop more accurate and cost-effective engineering solutions for US Army Corps of Engineers (USACE) coastal and hydraulic problems. Through the MCNP, design criteria and methods, construction practices,...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The U.S. Army Engineer District, Los Angeles and the Coastal Inlets Research Program have conducted a comprehensive study to investigate wave, flow, sediment transport, and permeable breakwaters with rocky outcrop bottom at Dana Point Harbor, as a part of the harbor revitalization project, on the southern Orange County coast, CA. The 5,500-ft shore-parallel West Breakwater and 2,250-ft shorenormal East Breakwater to protect the harbor are the main interest in the study of the structural...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The outcome of encounters between Atlantic sturgeon (Acipenser oxyrinchus) and active dredging operations in Federal navigation channels is dependent on a number of factors. Risk factors include: avoidance of or attraction to the presence of an active dredge, the proportion of time spent in bottom waters of the navigation channel along with other behavioral aspects of the target species. To assess potential entrainment by a CSD operating in the James River, Virginia, five Atlantic sturgeon (TL...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB,...
A project is being proposed to construct shallow-water habitat (SWH) along Middle Decatur Bend of the Missouri River in Burt County, Nebraska. The U.S. Army Corps of Engineers (USACE) is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization, and enhance habitat for the endangered pallid sturgeon (Scaphirhynchus albus) population along the lower Missouri River. The Omaha District (District)...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *FISHES, *WATER QUALITY, BANKS(WATERWAYS),...
The Columbia River estuary is the scene of a collision between strong river discharge, considerable tidal magnitude and violent surface gravity waves that have claimed thousands of vessels and hundreds of lives. Lagrangian GPS measurements of position and surface velocity and Eulerian measurements of vertical velocity structure, temperature and salinity were used to study circulation patterns in the mouth of the Columbia River, paying particular attention to the influence of Baker Bay and the...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *BAYS, *CIRCULATION, *COLUMBIA RIVER,...
As the austral summer approaches, major flow arteries are manually cleared in anticipation of the ephemeral runoff during the summer months. This flow, primarily from snowmelt, has daily and seasonal fluctuations. The flow fluctuation and variation depend on the air temperature and on many other factors. In addition, the runoff mobilizes sediment and localized soil contaminants that wash through these channels and discharge primarily into Winter Quarters Bay. This report quantifies the runoff...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND...
New York Harbor Pilots have expressed a concern to the New York District (NAN) about a mound that is approximately 1.5 miles seaward of the new limit of the Ambrose Channel. This mound is probably construction rubble that was placed there when the original Light Tower isolated and protected it somewhat from the main channel. The mound s diameter and depth are similar to the width and depth of the Ambrose Channel offshore reach. Now that the Light Tower is no longer marking this mound, the...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
Objective: Deliver to engineers desktops advanced models that can be used as practical tools for coastal inlets, coastal navigation channel, and adjacent beach studies. Models efficiently coupled to simulate relevant physical processes PC-based, user-friendly interface, fast, robust and accurate Manuals, tech reports, journal papers, Wiki, workshops, phone help, etc.
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The U.S. Army Corps of Engineers (USACE) is proposing a project to construct shallow-water habitat (SWH) along the Little Sioux Bend of the Missouri River between RM666 and RM669. The construction of SWH will enhance the aquatic habitat of the Missouri River and benefit the endangered pallid sturgeon (Scaphirhynchus albus) population. Although on the Nebraska side of the Missouri River, the project area is located in Harrison County, Iowa and Burt County, Nebraska and will basically run down...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *DISPOSAL, *FISHES, *NUTRIENTS, *WATER QUALITY,...
GSSHA (Gridded Surface Subsurface Hydrologic Analysis) is a physics-based, distributed, hydrologic, sediment and constituent fate and transport model. GSSHA can simulate 2D overland flow, 1D stream flow, 1D infiltration, 2D groundwater, and full coupling between groundwater, shallow soils, streams, and overland flow. GSSHA simulations can be very large and time consuming, simulating millions of grid cells over a period of years. In order to run these simulations in a reasonable amount of time,...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS INFORMATION TECHNOLOGY LAB,...
This Coastal and Hydraulics Engineering Technical Note (CHETN) describes a case study in which a Regional Sediment Management (RSM) strategy was developed in Mathews County, VA. The RSM effort began after severe shoaling had occurred in some of the County s Federal navigation channels following several years of no maintenance dredging. The County realized that low funding levels for dredging low-commercial-use Federal channels would likely persist into the future. Yet the County desires...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
A project is being proposed to construct shallow-water habitat (SWH) along the Missouri River at Indian Cave State Park in Richardson County, Nebraska. The U.S. Army Corps of Engineers (USACE) is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization, and enhance habitat for the endangered pallid sturgeon (Scaphirhynchus albus) population along the lower Missouri River. The Omaha District...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *FISHES, *HABITATS, *SUSPENDED SEDIMENTS, *WATER...
A project is being proposed to enhance shallow-water habitat (SWH) along Upper Calhoun Bend of the Missouri River in Pottawattamie County, Iowa. The U.S. Army Corps of Engineers (USACE) is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization, and enhance habitat for the endangered pallid sturgeon (Scaphirhynchus albus) population along the lower Missouri River. The Omaha District...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *FISHES, *WATER QUALITY, BANKS(WATERWAYS),...
This report documents the placement and monitoring of an active nearshore berm at Ft. Myers Beach, Florida. From May to July 2009, mixed sand and finer sediment dredged from a nearby inlet was were placed in the active littoral zone in the form of a bar-shaped nearshore berm. Six sets of beach-nearshore profile surveys and two periods of sediment sampling along profiles were collected. The Ft. Myers Beach nearshore berm migrated onshore roughly 300 ft during the first two years. The elevation...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
Three research and development programs within the US Army Engineer Research and Development Center (ERDC) have collaborated to investigate regional sediment management strategies within the Matagorda Bay system, emphasizing the excessive shoaling in the upper reach of the Matagorda Ship Channel (MSC). These three R&D programs were the Regional Sediment Management (RSM) Program, Coastal Inlets Research Program (CIRP), and Dredging Operations and Environmental Research (DOER) Program....
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
A project is being proposed to restore previously constructed shallow-water habitat (SWH) along Middle Decatur Bend of the Missouri River in Burt County, Nebraska. The U.S. Army Corps of Engineers (USACE) is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization, and enhance habitat for the endangered pallid sturgeon (Scaphirhynchus albus) population along the lower Missouri River. The Omaha...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *FISHES, *WATER QUALITY, BANKS(WATERWAYS),...
Jacksonville Harbor, in Duval County, FL, begins at the mouth of the St. Johns River where it empties into the Atlantic Ocean (Figure 1). The Federally authorized Jacksonville Harbor navigation project provides deep-draft vessels access to terminal facilities located within the City of Jacksonville. Jacksonville Harbor also serves the US Navy and the US Marine Corps. The Jacksonville Harbor General Re-evaluation Report (GRR) is investigating deepening and widening the Federal navigation...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
In accordance with the National Environmental Policy Act (NEPA) and implementing regulations, a Supplemental Environmental Assessment (EA) has been prepared for the proposed creation of a 2,700-foot connectivity channel and the creation of an approximately 2.4- acre overwintering pool for fish at the Louisville Bend State Wildlife Area (LBSWA) in Monona County, Iowa. The purpose of the proposed action is to restore hydraulic connectivity to a backwater wetland complex, referred to in this...
Topics: DTIC Archive, CORPS OF ENGINEERS OMAHA NE MISSOURI RIVER DIV, *CHANNELS(WATERWAYS), *ENVIRONMENTAL...
In accordance with the National Environmental Policy Act (NEPA) and implementing regulations, a Supplemental Environmental Assessment (EA) has been prepared for the proposed backwater renovation at Hole-in-the-Rock in Thurston County, Nebraska. The purpose of the proposed action is to repair damages that were sustained during the 2011 flood event. The original project was created to mitigate for aquatic and terrestrial habitat losses that resulted from implementation of the Missouri River Bank...
Topics: DTIC Archive, CORPS OF ENGINEERS OMAHA NE, *CHANNELS(WATERWAYS), *ENVIRONMENTAL ASSESSMENT,...
A project is being proposed to expand and enhance previously constructed shallow-water habitat (SWH) along the Missouri River at Glovers Point Bend in Thurston County, Nebraska. The U.S. Army Corps of Engineers (USACE) is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization. Increasing SWH will enhance habitat for the endangered pallid sturgeon (Scaphirhynchus albus) population along the...
Topics: DTIC Archive, ARMY ENGINEER DISTRICT OMAHA NE, *FISHES, *WATER QUALITY, BANKS(WATERWAYS),...
The US Army Engineer District, San Francisco (SPN) and the Coastal Inlets Research Program conducted a pilot study to consider various placement locations for dredged material in vicinity of Noyo Harbor, CA. Approximately 30,000-40,000 cu yd/yr of beach-quality sediment is dredged from the navigation channel and the lower Noyo River, located on the north central California coast. The pilot study investigated several potential locations for placement of dredged sediments in one of two areas...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
The Arid West region is dominated by watersheds that have a high frequency of intermittent and ephemeral channels. These channels are influenced by watershed characteristics and the local hydrologic regime, which dictate the amount of sediment deposited and eroded in the channel. Over time, this sediment movement causes the geometry of the channel and the surrounding floodplain to evolve. For this study, 14 mountain, 18 foothill, and 17 basin ephemeral and intermittent channels within multiple...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND...
