Environmental Restoration, Mitigation, & Impact Assessment Studies

Practice Overview

Environmental Impact Statement for Threatened and Endangered Species Habitat Maintenance and Creation

Missouri River Basin, Nebraska, South Dakota, North Dakota, Montana

Omaha District, US Army Corps of Engineers

DMA prepared a Programmatic Environmental Impact Statement for the District’s Emergent Sandbar Habitat maintenance and creation responsibilities under the US Fish and Wildlife Service’s 2000 and 2003 Biological Opinion.  The purpose of this project is to implement non-flow methods of maintaining and creating nesting habitat along nearly 800 miles of the Missouri River from the Fort Peck Reservoir in Montana to Ponca State Park in Nebraska.  The project is limited to the free-flowing reaches of the river, focused on approximately 400 river miles.  DMA provided planning and logistical support for public meetings and developed baseline data necessary for EIS preparation.

Primary Data Collection & GIS Analyses for Threatened and Endangered Species Habitat Maintenance and Creation

Missouri River Basin, Nebraska, South Dakota, North Dakota, Montana

Omaha District, US Army Corps of Engineers

DMA conducted a multi-task, GIS-based spatial analysis project to support NEPA documentation and implementation of the long term maintenance and creation of emergent sandbar habitat (ESH) program; conceived to mechanically favor riparian habitat along the Missouri River that is suitable for nesting and fledging of endangered least tern and piping plover populations.  The project entails the delineation of the program spatial limits (the riparian corridor) for more than 400 miles of free flowing reaches of the Missouri River.  The delineation of habitats within the riparian corridor; particularly ESH, the identification of features and values that should not be subject to the negative affects of ESH maintenance activities.  GIS work also supported the preparation of an implementation manual; stating the practices and procedures (and their environmental effects) that will be used to maintain and create ESH.  Habitat was mapped using aerial photographs from 1998 (representing post 1997 flood sandbar maxima), to determine the area of maintenance and creation obligation.  Data from various state and federal sources, and heads-up digitized data supported immediate NEPA decisions, served as a baseline for future habitat spatial assessments, and directed the initial years of planning and construction for the ESH implementation.

Environmental Restoration, mitigation, and Impact Assessment Projects

Feasibility Study & Environmental Assessment for Acid Mine Drainage Abatement / Aquatic Ecosystem Restoration

Fall Brook Run Basin, Pennsylvania

Baltimore District, US Army Corps of Engineers

DMA prepared the Feasibility Report and Environmental Assessment for an acid mine drainage abatement / aquatic ecosystem restoration project in Lackawanna County. PA.  The Fall Brook Run watershed is located in the anthracite coal region of northeast Pennsylvania.  Resulting from years of deep mining and relocation of the stream system associated with surface mining, Fall Brook Run and its tributary Murin Run have significant base flow losses.  During low summertime flow conditions, reaches of both streams are dry.  Historic underground mining and subsequent mine subsidence has enhanced bedrock fracture patterns of the streambed contributing to the observed loss of base flow.  The recommended plan developed by DMA consisted of sealing the streambed, aquatic and riparian corridor reclamation, and reclamation of a 285 acre abandoned strip mine site.  Activities performed by DMA include: water quality analysis, stream flow analysis, ecological baseline analysis, hydrologic and hydraulic investigations, geotechnical studies, plan formulation, native species planting plan development, natural channel enhancement design, preliminary and final design analysis, MCACES cost estimating, habitat analysis and quantification of ecological outputs, cost effectiveness and incremental cost analysis, economic and social impact studies, feasibility report preparation, NEPA documentation, and agency coordination and public involvement.

Feasibility Study for Aquatic Ecosystem Restoration

Morro Bay Estuary, California

Los Angeles District, US Army Corps of Engineers

DMA developed the study’s Planning Objectives, Constraints and Problem Identification, planning and executing a Public Involvement Action Plan, and formed a Technical Coordinating Committee to assist in executing the Feasibility Study.  DMA prepared the F3 Existing Conditions Report, and the F4 Alternative Formulation Report to identify the NER plans for ecosystem restoration and preservation alternatives.

Feasibility Study for Aquatic Ecosystem Restoration

Tres Rios Del Norte River Basin, Arizona

Los Angeles District, US Army Corps of Engineers

DMA prepared an F3 report and assisted the District in the preparation of an F4 Plan Formulation Report (development of alternative restoration plans) for the Tres Rios Del Norte project in Arizona. DMA prepared the draft and final reports based on technical input provided by the Los Angeles District.  Activities performed by DMA included: data review and preparation of a technical memorandum documenting data sufficiency and data gaps; project team meetings and site visits; review, evaluation, and supplementation of project plan formulation.

Feasibility Study for Aquatic Ecosystem Restoration

Paseo De Las Iglesias, Arizona

Los Angeles District, US Army Corps of Engineer

DMA formulated and evaluated alternative plans for the Paseo de las Iglesias study.  Services included plan formulation/evaluation during the F4 phase of the study.  Specifically, DMA formulated alternative water resource measures; evaluating and revising formulated alternatives; and incorporating results, findings and recommendations into the Main Report Document.  The alternatives addressed various water resources objectives including environmental restoration, flood control, water quality, water conservation, recharge, and recreation.  As part of this work, DMA prepared preliminary sketches and completed additional design and analysis for use by cost estimators for the six best alternatives identified in the preliminary screening as agreed by the District and the Sponsor.

Feasibility Study for Aquatic Ecosystem Restoration

El Rio Antiguo, Arizona

Los Angeles District, US Army Corps of Engineers

DMA prepared an F3 report and assisting the District in the preparation of an F4 Plan Formulation Report (development of alternative restoration plans) for the El Rio Antiguo, Rillito project in Arizona. DMA prepared the draft and final reports based on technical input provided by the Los Angeles District.  Activities performed by DMA included: data review and preparation of a technical memorandum documenting data sufficiency and data gaps; project team meetings and site visits; review, evaluation, and supplementation of project plan formulation.

Feasibility Studies & Environmental Assessments for Aquatic Ecosystem Restoration

Powell River Basin, Virginia

Nashville District, US Army Corps of Engineers

DMA prepared three feasibility reports and Environmental Assessments for acid mine drainage abatement and aquatic ecosystem restoration projects in the Appalachian region of southwestern Virginia.  DMA activities included: review of available data, site reconnaissance, development and implementation of a comprehensive water quality sampling program, hydrologic and hydraulic investigations, preliminary design and cost estimating of restoration features, preliminary economic and socio-economic analyses, environmental and fish and wildlife studies, public and agency involvement, formulation and screening of alternative plans, additional water quality sampling and flow measurements, completion of hydrologic and hydraulic investigations, final design and cost estimating of restoration features, final economic and socio-economic analyses, environmental and fish and wildlife studies, public and agency involvement, completion of plan formulation activities, and preparation of the draft and final feasibility report and NEPA document.

Plans & Specifications Preparation for Aquatic Ecosystem Restoration

Powell River Basin, Virginia

Nashville District, US Army Corps of Engineers​

Following DMA’s successful completion of the Powell River Basin Feasibility Studies, DMA and a team subcontractor prepared Plans and Specifications (P&S) for the four project sites.  Activities performed included: HTRW investigations and analysis, additional geotechnical investigations and analysis, preparation of P&S-level designs and construction drawings, preparation of construction specifications, preparation of the government bid estimate, additional surveying for geotechnical borings and disposal areas, and Indiana Bat (Federal T&E species) specimen tree surveys.  In addition, DMA conducted continuing coordination with the non-Federal sponsor, the Virginia Department of Mines, Minerals and Energy, and Federal and state resource agencies.

Feasibility Study for Aquatic Ecosystem Restoration

Gowanus Bay and Canal, New York

New York District, US Army Corps of Engineers

Gowanus Bay includes approximately 130 acres of open water between Bay Ridge Channel in the Upper Bay of New York Harbor and the beginning of the canal.  The Gowanus watershed is a highly developed urban area totally located in the Borough of Brooklyn, City of New York.  The watershed encompasses approximately 6 square miles of mostly impervious surface.  Water quality and aquatic habitat have been degraded by stormwater, sewage system, and other permitted discharges into the canal.  DMA is currently assisting the New York District in achieving the P-7 Milestone for the feasibility study of Gowanus Bay and Canal, New York.  DMA is perform eight tasks in support of the study effort: Assist in Coordination with the Non-Federal Sponsors, Assist in Conducting Agency and Public Coordination Meetings, Maintain the Gowanus Bay and Canal Feasibility Study GIS data base, Assist in Preparation of Draft Scopes of Work for Sedimentation and Water Quality Modeling, Conduct Biological Investigations of the study area, Assist in development of the preliminary draft EIS, Assist in Development of a Habitat Evaluation Method, and preparation of the P-7 Formulation Briefing Document.

Preliminary Analysis & Project Management Plan for Ecosystem Restoration

Hudson-Raritan Estuary, New York & New Jersey

New York District, US Army Corps of Engineers

DMA performed the reconnaissance phase investigations to evaluate the Federal interest in implementing solutions to water resource problems and addressing ecosystem restoration opportunities in the Hudson-Raritan Estuary, New York and New Jersey.  The focus of the study was to identify large or otherwise significant areas of estuarine and coastal habitat where ecologically significant restoration could be accomplished.  Because the study area is large and ecologically complex, it was necessary to quickly, accurately and thoroughly identify and categorize potential habitat restoration opportunities.  Numerous Federal, state, and local agencies have jurisdiction throughout the study area; therefore it was essential to coordinate with and insure participation by all stakeholders during the site selection and prioritization process.  DMA’s roles in the reconnaissance study were to develop and produce (1) the Section 905(b) (WRDA 1986) Preliminary Analysis Report, (2) three Project Management Plans that define the products and describe the tasks to be accomplished during three feasibility studies, and (3) an itemized budget and schedule for each feasibility study.  During the feasibility phase, DMA is providing support to the New York District in preparing a Feasibility Study QC Plan and QC Reports, defining the restoration goals for each of the thirteen sites, developing site-specific agency and stakeholder contact lists, determining site-specific feasibility study schedules, budgets, and milestones, and collecting existing and usable data that can be applied to each feasibility study.

Feasibility Study for Ecosystem Restoration

Flushing Bay and Creek, New York 

New York District, US Army Corps of Engineers​

DMA conducted a feasibility study for ecosystem restoration in the drainage area of Flushing Bay and Creek.  Alternatives developed include tidal and non-tidal wetland restoration and water quality improvements in the backbay area.  DMA prepared the reconnaissance report and PSP under an earlier contract.  Feasibility study tasks included: revision and updating the Project Study Plan; coordination with non-Federal sponsors; agency and public involvement meetings; surveying and mapping; bathymetry; and current velocity measurements; preparation of detailed work plans for feasibility study efforts, environmental baseline surveys, wetlands delineation, and preparation of preliminary alternatives.  DMA efforts also included: alternative screening, formulation and evaluation of final plans, final design and cost estimating, cost effectiveness and incremental cost analysis, preparation of the AFB Technical Memorandum, and preparation of the Feasibility Report and NEPA document.

Feasibility Study for Ecosystem Restoration

Upper Little Tennessee River Basin, North Carolina
 
Nashville District, US Army Corps of Engineers

DMA initiated the feasibility phase by re-evaluating the ecological and engineering feasibility of recommendations contained in the 1997 Section 905(b) Preliminary Appraisal.  Feasibility phase activities performed by DMA included: update of the Project Study Plan; identify and define the location of the watershed project; obtain and analyze existing sediment data; obtain, review and prepare preliminary analyses of existing precipitation, water flow and water quality data sets; preliminary formulation of in-lake alternatives; NEPA document outline, scoping process, and coordination letters; meetings and presentations; preliminary design of watershed alternatives; bathymetry, and planning coordination for the feasibility report.

Feasibility Study for Aquatic Ecosystem Restoration

North Fork Yellow Creek Basin, Ohio 

Pittsburgh District, US Army Corps of Engineers

DMA conducted engineering, environmental, and plan formulation activities in support of the Section 206 feasibility study.  DMA activities included: review of available data, site reconnaissance, development and implementation of a comprehensive water quality sampling program, hydrologic and hydraulic investigations, preliminary design and cost estimating of restoration features, preliminary economic and socio-economic analyses, environmental and fish and wildlife studies, public and agency involvement, and formulation and screening of alternative plans.

Feasibility Study for Aquatic Ecosystem Restoration

Spring Creek Basin, Alabama

Nashville District, US Army Corps of Engineers

DMA prepared the DPR and EA for the feasibility phase of the Spring Creek Aquatic Ecosystem Restoration study.  Work under this task order required DMA to conduct baseline studies including survey and mapping, hydrology and hydraulics, cultural resource studies, environmental studies, economics, and preliminary formulation and screening of alternatives.  Project alternatives evaluated during the feasibility phase consisted of flood plain restoration, wetland and aquatic habitat restoration, and stream bank protection along Spring Creek.

Endangered Species Survey for Flood Damage Reduction Project

Big Sioux River Basin, South Dakota

Nashville District, US Army Corps of Engineers

DMA conducted a survey for the endangered Topeka Shiner in the headwaters of the Big Sioux River, near Watertown, South Dakota.  The presence/absence survey was conducted to provide documentation for the Flood Control for Watertown and Vicinity, South Dakota feasibility study prepared by the Omaha District.  Services required under this project included the identification and mapping of all potential Topeka shiner habitat locations in the 8000-acre estimated 100-year flood pool perimeter, obtaining all state and federal sampling permits, obtaining landowner permissions to access the habitat areas, sampling of 13 reaches at, above and below the proposed dam location and report preparation. 

Environmental and Economic Equity Support for Ecosystem Restoration Project

Everglades, Florida

Jacksonville District, US Army Corps of Engineers

For the Jacksonville District, DMA provided projections of socio-economic indicators for without project conditions, CERP (alternative futures), and then conditions with the implementation of four key CERP projects, which will impact rural agricultural based economies (implementation scenarios). DMA answered three key questions regarding the affected areas: 1) What would be the likely development patterns without CERP? 2) What impacts will these CERP projects have on these areas? 3) What can be done to mitigate negative impacts and take advantage of opportunities?

Environmental Assessment for National Wildlife Refuge

Fort Peck Lake, Montana

Omaha District, US Army Corps of Engineers

DMA prepared NEPA documentation for the sale by the Corps of lots adjacent to Fort Peck Lake, Montana and the purchase of lands suitable for inclusion in the Charles M. Russell (CMR) National Wildlife Refuge (NWF) by the US Fish and Wildlife Service.  The NEPA document was an Environmental Assessment (EA) with the Omaha District as the lead agency and the USFWS as a formally recognized cooperating agency.  DMA provided logistical and materials support at four public meetings in Montana (Helena, Billings, Glasgow, Fort Peck), developed read-ahead and handout materials and the public meeting slide presentation.  In coordination with the Omaha District, DMA prepared a single EA addressing all four sites.

Economic Analysis for Sediment Beneficial Use Study for Navigation Project 

New York / New Jersey Harbor

New York District, US Army Corps of Engineers

The goal of this project was to provide the New York District with: (1) a systematic framework and (2) a preliminary evaluation of the potential benefits and costs associated with five candidate scenarios for handling dredged material from NY/NJ waterways. The five scenarios examined for potential beneficial uses of dredged material include: Brownfield Site Remediation - OENJ Bayonne Site; Coal Mine Acid Drainage Mitigation - Lehigh Anthracite Mine; Aquatic Habitat Restoration - Norton Basin; Landfill Closure - Pennsylvania Landfill; Quarry Closure - Hunterdon Quarry. 

Feasibility Study for Ecosystem Restoration 

Morro Bay Estuary, California

Los Angeles District, US Army Corps of Engineers

DMA conducted a without-project, existing conditions analysis of the Morro Bay Estuary Study Area, and prepared a Without Project Conditions Integrated Main Report.  Activities performed by DMA included: developing planning objectives, constraints and problem identification; planning and executing a public involvement action plan; formulating preliminary alternatives; and forming a Technical Coordinating Committee to assist in executing these activities.  The Integrated Main Report included formulation of ecosystem restoration and preservation alternatives, with preliminary evaluation of these alternatives based on the planning objectives, constraints, costs, and environmental effects and results. 

Preliminary Analysis & Project Management Plans for Ecosystem Restoration

Various Locations, Pennsylvania and Ohio

Pittsburgh District, US Army Corps of Engineers

DMA prepared Section 1135 & 206 Preliminary Restoration Plans for Improvement to the aquatic ecosystem for: Lorraine Pile, Pergrin Run, PA; Conemaugh Lake, PA; Saxman Run, Loyalhanna Lake, PA; Deer Lakes, Allegheny County, PA; and Wheeling Creek, OH.  The five projects addressed coal refuse piles, acid mine drainage, lake sedimentation, and aquatic habitat improvements.  DMA identified degraded ecosystem elements for each project, formulated project alternatives and quantified their ecological outputs, estimated project costs, and prepared the draft and final PRP’s.

Economic Evaluation of Mitigation Plans for Flood Damage Reduction

Levisa Fork River Basin, West Virginia


Huntington District, US Army Corps of Engineers

DMA developed a screening process and conducted cost effectiveness and incremental cost analysis of mitigation alternatives for the proposed flood control dam in the Levisa Fork Basin.  DMA formulated a linear programming model to evaluate the most cost effective mitigation plan for three subcategories of mitigation:  terrestrial, aquatic and riparian.  For each subcategory, combinations of mitigation measures were developed to meet specified mitigation targets. The linear programming model selected the least cost plans to meet specific mitigation goals subject to technical constraints identified by an inter-agency team of ecologists and biologists.  The results of the cost effectiveness and incremental cost analysis were used to identify optimal plans in each subcategory -- the optimal plans were combined to determine the most cost effective mitigation program.  This analysis resulted in a 78 percent reduction in mitigation costs.

Environmental Mitigation Plan for Navigation Improvements 

Kanawha River Basin, West Virginia

Huntington District, US Army Corps of Engineers

DMA developed and quantified mitigation obligations for system impacts associated with lock and dam rehabilitation and upgrades for the Winfield Locks and Dam replacement project.  DMA formulated the mitigation plan, including designs and cost estimates for systems impacts.  Specifically, DMA developed ecosystem restoration alternatives for the Kanawha River and conducted cost effectiveness and incremental cost analysis to identify the recommended mitigation plan.  DMA also prepared the draft mitigation plan and assisted the District in coordination / negotiations with state and federal resource agencies.

Environmental Assessment and Plan Formulation for Ecosystem Restoration

Drakes Creek Basin, Tennessee 

Nashville District, US Army Corps of Engineers

DMA performed plan formulation activities and prepared the plan formulation sections of the environmental restoration reports and environmental assessments for two proposed projects along Drakes Creek, an embayment of Old Hickory Lake.  Plans developed and evaluated included: environmental dredging, dike construction, and aquatic and riparian habitat restoration.  Habitat evaluations and cost effectiveness and incremental cost analyses were also prepared for the study.
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In the Water Resources Development Act (WRDA) of 1986, Congress created the Section 1135, Project Modifications for the Improvement of the Environment program.  Section 1135 provided the authority to the Corps of Engineers to implement projects to reverse    environmental damage that may have been caused, or exacerbated, by previous Corps projects.  The Water Resources Development Act (WRDA) of 1992 marked another significant change in policy direction for the Corps Civil Works Program.  The Act authorized the Secretary of the Army to “...include environmental protection as one of the primary missions of the Corps of Engineers in planning, designing, constructing, operating and maintaining water resources projects.”  In addition, the Act further established as goals, “no net loss of wetlands” and “an increase in the quality and quantity of the Nation’s Wetlands.”   Most recently, in WRDA 1996, Congress extended the Corps’ mission in ecosystem restoration to its Continuing Authorities Program, creating the Section 206 Aquatic Ecosystem Restoration program to address smaller (i.e., Federal costs < $5 million) restoration efforts.   

DMA has extensive experience in this rapidly expanding new mission area and has participated in the planning and design of environmental restoration projects, and in the design of environmental mitigation plans.  Examples of our recent environmental restoration and mitigation projects are described below.

Preliminary Analysis & Project Management Plans for Ecosystem Restoration

North Chickamauga Creek Watershed, Tennessee 

Nashville District, US Army Corps of Engineers

DMA conducted an expedited reconnaissance study to evaluate potential solutions for reversing ecosystem degradation due to: acid mine drainage from abandoned mine lands, stream erosion and sedimentation, and wetland degradation in the North Chickamauga Creek Watershed.  Acid mine drainage and surface erosion from past mining activities have led to deteriorated water quality and wildlife habitat in the basin’s aquatic ecosystem.  Other related water resource problems addressed in the reconnaissance study included stream bank erosion and sedimentation, flooding, storm water management, and non-point source pollution.  Following completion of field reconnaissance, DMA prepared the Section 905(b) Preliminary Assessment.  DMA also prepared a detailed list of tasks (and task descriptions) to be conducted during the feasibility phase for inclusion in the project management plan.

Economic Impact Assessment for Ecosystem Restoration Measures

Everglades, Florida 

Jacksonville District, US Army Corps of Engineers

DMA supported the Jacksonville District in the economic analyses of the Central and Southern Florida Comprehensive Review Study (C&SF Restudy). The Central and Southern Florida Project, authorized in 1948, is a system of levees, canals, water control structures, and management operations that were primarily designed to provide flood control and water supply to southern Florida.  DMA evaluated the economic impacts of the alternative restoration plans.  This required comparison of the differences between conditions estimated to exist in the future with and without implementation of a plan.  DMA evaluated the potential economic effects of these plans on agricultural water use, municipal and industrial (M&I) water use, commercial navigation, recreation, and commercial fishing.

Economic Impact Assessment for Lake Level Regulation

Everglades, Florida 

Jacksonville District, US Army Corps of Engineers

DMA conducted an economic analysis as part of the Jacksonville District’s effort in estimating the effects of alternative regulation schedules for Lake Okeechobee.  Lake Okeechobee is a large, natural, shallow, freshwater lake located in the central part of the Florida peninsula.  Historically, Lake Okeechobee has been regulated with the goals of meeting multiple objectives, water supply and flood control.  However, environmental concerns for the lake’s littoral zone and disruptions to overland flows through the vast wetland complex in South Florida, including the Everglades, have increasingly become competing objectives.  The purpose of the Lake Okeechobee Regulation Schedule Study was to develop a regulatory schedule for the lake that more effectively balanced these competing objectives.  DMA’s investigation addressed the economic tradeoffs among these competing objectives.  DMA’s analysis consisted of estimating the economic consequences for agricultural and urban water use, for navigation and recreation, and for commercial fishing which may be associated with alternative lake regulation schedules.  Economic impacts were analyzed in terms of both net national effects (NED) and regional effects (RED).

Preliminary Analysis & Project Management Plans for Ecosystem Restoration

Flushing Bay and Creek Watershed, New York 

New York District, US Army Corps of Engineers

DMA conducted a reconnaissance study to evaluate environmental restoration opportunities and water quality improvements to Flushing Bay and Creek.  DMA led the plan formulation effort, defined environmental restoration objectives, proposed preliminary restoration options, and formulated management plan alternatives to address ecosystem restoration, water quality improvement, navigation/anchorage concerns, recreation opportunities, and impacts on the local economy.  DMA performed cost effectiveness and incremental cost analyses of alternative plans, and organized and facilitated meetings of Federal and non-Federal interest groups to assess interest and support for continued studies.  The product of the study was a Reconnaissance Study Report and Project Management Plan for the feasibility phase.

Cost Effectiveness & Incremental Cost Analysis for Ecosystem Restoration

Piedmont Lake / Lick Run Embayment, Ohio

Huntington District, US Army Corps of Engineers

DMA performed a Cost Effectiveness and Incremental Cost Analysis of ecosystem restoration plans for acid mine drainage abatement on Piedmont Lake / Lick Run.  The analysis involved an incremental comparison of the costs and ecological outputs of a variety of management measures and treatments for improving fisheries habitat in Piedmont Lake.  DMA performed the analysis using the “Nine Easy Steps” approach and the WES / IWR Cost Effectiveness Analysis model.

Preliminary Analysis & Project Management Plans for Ecosystem Restoration

Hocking River Watershed, Ohio

Huntington District, US Army Corps of Engineers

DMA conducted an expedited reconnaissance study to evaluate potential solutions for reversing ecosystem degradation due to abandoned mine land drainage in the Hocking River Basin, Ohio.  Acid mine drainage and surface erosion have led to severely deteriorated water quality in the basin’s stream and riverine ecosystems.  DMA identified on-going and historical water planning efforts, characterized the study area’s water resource problems, formulated restoration / reclamation alternatives, and evaluated the likely benefits, costs and environmental impacts for each alternative.  These alternatives included both physical (grading and shaping, re-vegetation, anaerobic sub-surface wetlands, constructed wetlands) and chemical (sulfate reduction via organic matter, alkaline additions, open limestone channels, metal adsorption on fly ash, limestone dosing) treatment options.  Additionally, DMA estimated the time and cost to conduct an in-depth feasibility study as well as assessed the level of interest and support from non-Federal entities in cost sharing for the feasibility phase and project construction.

Cost Effectiveness & Incremental Cost Analysis for Ecosystem Restoration

Grassdale – Delaware City, Delaware


Philadelphia District, US Army Corps of Engineers

DMA conducted a cost effectiveness / incremental cost analysis of alternative restoration plans.  DMA performed the analysis using the “Nine Easy Steps” approach and the WES / IWR Cost Effectiveness Analysis model.

Cost Effectiveness & Incremental Cost Analysis for Ecosystem Restoration

Wills Creek Basin, Ohio

Huntington District, US Army Corps of Engineers

DMA conducted a cost effectiveness / incremental cost analysis of alternative restoration plans.  DMA performed the analysis using the “Nine Easy Steps” approach and the WES / IWR Cost Effectiveness Analysis model.