Certified and other national models, guidance, and PCX links.
Certified Models |
These models have met all requirements and are certified for use on planning studies.
Beach-fx 1.0 (Certified)
BEACH-fx is a certified prototype shore protection engineering-economic software tool. The model consists of a Monte-Carlo simulation that evaluates beach erosion, physical storm impacts, and damages that occur from a storm passing ashore. The goal of this project is to produce a tool to assist engineers in coastal nourishment and rehabilitation studies.
HarborSym is a planning-level simulation model designed to assist in economic analyses of coastal harbors. With user-provided input data, such as the port layout, vessel calls, and transit rules, the model calculates vessel interactions within the harbor. Unproductive wait times result when vessels are forced to delay sailing due to transit restrictions within the channel; HarborSym captures these delays.
HEC-EFM: Ecosystem Functions Model
The Ecosystem Functions Model (HEC-EFM) is designed to help study teams determine ecosystem responses to changes in the flow regime of a river or connected wetland. HEC-EFM analyses involve: 1) statistical analyses of relationships between hydrology and ecology, 2) hydraulic modeling, and 3) use of Geographic Information Systems (GIS) to display results and other relevant spatial data.
HEC-FDA: Flood Damage Reduction Analysis Software (Certified)
This certified software provides the capability to perform an integrated hydrologic engineering and economic analysis during the formulation and evaluation of flood risk management plans. HEC-FDA is designed to assist USACE study members in using risk analysis procedures for formulating and evaluating flood risk management measures (EM 1110-2-1619, ER 1105-2-101).
HEC-FIA 2.2 (Certified)
The Hydrologic Engineering Center's (HEC) Flood Impact Analysis (HEC-FIA) software is a tool to help identify the consequences from a single event. HEC-FIA was developed by HEC in collaboration with the Risk Management Center (RMC) and the Engineering Research and Design Center (ERDC). HEC-FIA evaluates consequences from events defined by hydraulic model output such as gridded data (e.g., depth and arrival time Grids) or HEC's Data Storage System (HEC-DSS) Stage Hydrographs. The consequences HEC-FIA computes include economic losses (losses to structures and their contents), agricultural losses, and expected life loss from these hydraulic events.
The Risk Management Center's (RMC) Life Loss Estimation (LifeSim) software is spatially-distributed dynamic simulation modeling system for estimating potential life loss and direct economic damages from floods. The software is used extensively in the USACE Dam and Levee Safety Programs to inform program priorities and investment decisions; however, for use in traditional USACE planning studies it is certified for estimating potential life loss only.
IWR Planning Suite 184.108.40.206 (Certified)
This model assists with formulating plans, cost-effectiveness, and incremental cost analysis, which are required in ecosystem restoration projects. Use of this model is acceptable for studies with Review Plans approved prior to May 31, 2018. Other studies should be using IWR Planning Suite II (Version 2.0.9).
IWR Planning Suite 2.0.6 (Certified)
This model expands Version 220.127.116.11 by adding an "annualizer" module. This module allows for easy calculations of equivalent annual average values, total net values, annualizing non-monetary benefits, and calculating costs. Use of this model is acceptable for studies with Review Plans approved prior to May 31, 2018. Other studies should be using IWR Planning Suite II (Version 2.0.9).
IWR Planning Suite II (version 2.0.9) (Certified)
IWR Planning Suite II (version 2.0.9) includes the following modules to assist with plan formulation and evaluation: Plan Generator; Cost-Effectiveness and Incremental Cost Analysis (CE/ICA); Annualizer; Multi-Criteria Decision Analysis (MCDA); Uncertainty Analysis; and Watershed Wizard. This version of the software provides improved performance across all modules, a new user interface and database, and more robust reporting capabilities than previous versions. Please refer to the 31 May certification memo for conditions regarding use of this model.
Ohio River Navigation Investment Model (ORNIM) is a planning-level model developed by the Corps of Engineers to assist in economic analysis of proposed inland navigation investments. OR-NIM was first used in the Ohio River Mainstem Systems Study (ORMSS) to develop a system investment plan incorporating risk and uncertainty, and made possible the first systemwide optimization of navigation investments.
- Regional Economic System (RECONS)
The RECONS 2.0 model is a regional economic impact modeling tool developed by
the USACE Institute for Water Resources (IWR) to provide accurate and defensible
estimates of regional economic impacts associated with Federal expenditures. This
modeling tool automates calculations and generates estimates of jobs and other
economic measures such as income and sales associated with USACE spending on
Civil Works programs and projects. The RECONS 2.0 model incorporates impact
area data, multipliers, direct ratios, and geographic capture rates extracted from
other planning models utilized to evaluate the economic effects of proposed
Section 902 Analysis Certified Tool
Section 902 of the Water Resources Development Act (WRDA) of 1986 defines the maximum amount that a project may cost. This is often called the 902 Limit or Project Cost Cap. It is, "The maximum project cost limit imposed by Section 902 is a numerical value specified by law which must be computed in a legal manner (ER 1105-2-100 Appendix G)." This tool assists with this calculation.
Unit Day Value (UDV) tool
The Unit Day Value (UDV) tool is a certified spreadsheet intended to calculate recreation values. Please note the policy limitations on using UDV and also ensure that the current year's version (updated annually) is being employed.
National Models In Review
HEC-EFM Plotter: Ecosystem Functions Model Plotter
HEC-EFM Plotter is designed to help users view, navigate, and interpret output generated by HEC-EFM. Available outputs are automatically imported as a series of "Standard Plots" for the flow regimes and relationships being analyzed in HEC-EFM.
HEC-WAT: Watershed Analysis Tool
The Watershed Analysis Tool (HEC-WAT) software developed by the US Army Corps of Engineers' Hydrologic Engineering Center (HEC) is a tool that streamlines the analytical and reporting processes of software commonly used by the multi-disciplinary teams in Corps offices for water resources studies. The WAT accomplishes this through a common graphical user interface in the PC environment.
Ecosystem Restoration Model Library
The Ecosystem Restoration Planning Center of Expertise Model Library is intended to serve planners and practitioners of ecosystem restoration by consolidating and providing access to information about ecosystem restoration planning models and software.
Certification of the Hydrologic Engineering Center's Flood Damage Analysis Software Version HEC-FDA v1.4.3
This memo confirms certification of the HEC-Flood Damage Analysis model (HEC-FDA) v1.4.3. by the Flood Risk Management Planning Center of Expertise. The 1.4.3 version appropriately accounts for damages from infrequent flood events (e.g., low frequency events used in dam safety).
Decertification of the Average Annual & Interest During Construction Tool
This 20 September 20210 memorandum announces that the Average Annual & Interest During Construction Tool is decertified and notes that the IWR Plan Annualizer has been certified and should be used instead.
Delegation of Model Certification
This memo directs that guidance contained within EC 1105-2-412, Assuring Quality of Planning Models, as well as the memorandum issued 4 December 2017, Modification of the Model Certification Process and Delegation of Model Approval for Use, remain applicable until an update of the EC is issued, with the exception that certification of models is now delegated to the Directors of the Planning Centers of Expertise.
Engineer Circular 1105-2-412: Assuring Quality of Planning Models
This circular establishes the process and the requirements for assuring the quality of planning models. Per Planning Bulletin 2013-02 (March 2013), EC 1105-2-412 remains in effect until permanent planning model guidance is issued. The Assuring Quality of Planning Models: EC 1105-2-412 Rollout Webinar provides an overview of the EC. Note: This EC has since been modified by the Modification of the Model Certification Process and Model Approval for Use (4 December 2017) and Delegation of Model Certification (11 May 2018) memos from the Director of Civil Works.
Engineering and Construction Bulletin No. 2007-6, Model Certification Issues for Engineering Software in Planning Studies
The purpose of this document is to clarify issues regarding the application of EC 1105-2-407, "Planning Models Improvement Program: Model Certification" to engineering software used in USACE studies.
This document is descriptive of version 18.104.22.168 (October 2013) and includes details on the latest HarborSym functionality.
HarborSym Widening Model Certification Memorandum
This memorandum provides guidance on the HarborSym Deepening and Associated Tools - Model Certification.
HEC-LifeSim 1.01 (Certified for Life Loss Estimation)
The Hydrologic Engineering Center's (HEC) Life Loss Estimation (HEC-LifeSim) software is a spatially-distributed dynamic simulation modeling system for estimating potential life loss and direct economic damages from floods. The software is used extensively in the USACE Dam and Levee Safety Programs to inform program priorities and investment decisions; however, for use in traditional USACE planning studies it is certified for estimating potential life loss only.
Hydrologic Engineering Center Flood Impact Analysis (HEC-FIA) Version 2.2 Model Certification Memo
HEC-FIA Version 2.2 was certified for use through 30 August 2023.
Modification of the Model Certification Process and Delegation of Model Approval for Use
This memo directs that guidance contained within EC 1105-2-412, Assuring Quality of Planning Models, remains applicable until an update of the EC is issued and, further, that the requirement for a HQUSACE Model Certification Panel is rescinded and the responsibilities are transferred to the PCX in accordance with their enterprise-wide role in their mission areas.
Planning Bulletin 2013-02: Assessing Quality of Planning Models (EC 1105-2-412)
Guidance for assuring the quality of Planning models contained in EC 1105-2-412 (expiration March 31, 2013) remains in effect per this Planning Bulletin until permanent Planning models guidance is issued as an Engineering Regulation.
Memo: Policy Guidance on Certification of Ecosystem Output Models
This memorandum establishes additional policy and procedures regarding the certification requirements for ecosystem output models used in all planning activities.
Protocols for Certification of Planning Models: Planning Models Improvement Program
This paper provides information on the certification process and on the criteria to be used to ensure high quality models for use by Corps planners.
Regional Economic System (RECONS) Model Re-Certification Memo
The RECONS 2.0 model is a regional economic impact modeling tool developed by the USACE Institute for Water Resources (IWR) to provide accurate and defensible estimates of regional economic impacts associated with Federal expenditures. This modeling tool automates calculations and generates estimates of jobs and other economic measures such as income and sales associated with USACE spending on Civil Works programs and projects. The RECONS 2.0 model incorporates impact area data, multipliers, direct ratios, and geographic capture rates extracted from other planning models utilized to evaluate the economic effects of proposed actions. An earlier version of RECONS was previously certified by HQUSACE.
- Ecosystem Management and Restoration Research Program (EMRRP) Overview (27 January)
- This webinar provided an overview of the Ecosystem Management and Restoration
Research Program (EMRRP) and how it can help address current and future
environmental planning challenges. Presenter Dr. Brook Herman (Research Ecologist and
Program Manager, EMRRP) discussed how EMRRP is designed to be a flexible research
program capable of addressing a wide range of issues associated with ecosystem
restoration that can be a source of collaboration bringing together planning teams with
subject matter experts. Dr. Herman also described how research funded by EMRRP has
addressed planning challenges, such as helping to increase the number of certified
ecological planning models and providing knowledge transfer of monitoring and adaptive
management practices. In addition, Dr. Herman addressed the Statement of Need (SON)
process and important submittal dates.
- Ecological Benefits, Resource Significance, and Their Impact on Project Budget (18 November)
- This webinar provided an overview of how significance, benefits, and budget work
together. Presenter Debby Scerno (Environmental Reviewer, Office of Water Project
Review) focused on Ecosystem Restoration projects, but much of the information
provided can also be applied to compensatory mitigation. The webinar highlighted tools
and resources to help project teams describe resource significance for both Ecosystem
Restoration and mitigation, as well as to determine what benefits will be sought for a
- Multi-Criteria Decision Analysis (MCDA) and IWR Planning Suite (9 September)
- This webinar provided an overview of the Multi-Criteria Decision Analysis (MCDA) module
withing the Institute for Water Resources (IWR) Planning Suite II. Presenter Eric Johnson
(Economist, IWR) provided an overview of the MCDA module’s ability to consider the
influence of multiple criteria on project alternatives; how the module helps planners and
economists clarify and convey tradeoffs across multiple criteria; and how the module can
assist study teams in the evaluation of multiple benefit types across the four accounts
(National Economic Development, Environmental Quality, Regional Economic
Development, and Other Social Effects).
- Overview of the Regional Economic System (RECONS) Model (3 September)
- This webinar provided an overview of the Regional Economic System (RECONS) model,
which automates calculations of regional economic activity. RECONS Team members Wen
Chang (Senior Economist, Institute for Water Resources), Dena Abou (Regional Technical
Specialist, Inland Navigation Economics, Chicago District, and Holly Bender (Lead
Regional Economist, Kansas City District) discussed the importance of RECONS in light of
the 3 April 2020 directive issued by the Assistant Secretary of the Army for Civil Works
(ASA(CW)) for USACE to provide a comprehensive documentation of benefits in
feasibility studies. RECONS is the Agency's only certified regional economic development
(RED) model, making it an essential tool for compliance with the ASA(CW) directive.
Presenters summarized key differences between the national economic development
(NED) and RED accounts, and provided an overview of the RECONS model, including a
- IWR Planning Suite II Uncertainty Module (23 July)
- This webinar provided an overview of the Uncertainty Module within the Institute for
Water Resources (IWR) Planning Suite II. The module provides its users with the ability to
consider the influence of uncertainty on the results of cost-effectiveness and incremental
cost analyses performed on study alternatives involving monetary and non-monetary
costs and benefits. Presenter Shawn Komlos (Supervisory Physical Scientist at IWR)
discussed how the module, which is a standard component of the certified version of the
IWR Planning Suite II software, was developed and implemented to support a study
teams efforts to rapidly assess the influence of uncertainty on alternatives on or near the
- Ecological Model Review and Certification Process (9 July)
- This webinar, presented by Nate Richards (ECO-PCX Model Review Manager), provided
an overview of the model certification process for ecological models and presented
advancements in the process. Model review and certification has a reputation of taking a
long time and requiring significant funds. These misconceptions, among others, have
decreased in recent years thanks to a greater understanding of the certification
requirements, increased emphasis on model quality by planning teams, delegation of
approval authority, and implementation of best practices. The webinar also provided
useful information and tips for planners, decision-makers, researchers, and others that
develop, implement, and review aspects of ecological planning models.
- Ecological Model Development within the Planning Phase (20 February)
- This webinar provided an overview of the advancements being made in ecological model
development. The webinar was presented by Dr. Kyle McKay (ERDC-EL), Dr. Todd
Swannack (ERDC-EL), and Nate Richards (ECO-PCX Model Review Manager), and
focused on developed and implemented tools, guidelines, and methodologies that
improve the way we develop ecological models and align development, certification, and
project planning. Case studies presented demonstrated that model development and
certification are not only possible within SMART Planning timelines, but also valuable to
- IWR Planning Suite II (3 October)
- This webinar provided an overview of the capabilities and uses of the USACE-certified
IWR Planning Suite II (IWRPS-II) software. The webinar was presented by Shawn Komlos
and Laura Witherow (Institute for Water Resources), as well as and Cory Rogers (CDM
Smith) and focused on the IWRPS-II Multi-Criteria Decision Analysis module and its
potential uses during execution of USACE Planning Studies.
- IWR Planning Suite II (26 July)
- Ms. Laura Witherow (Institute for Water Resources) and Ms. Monique Savage (St. Paul
District) provided information on the IWR Planning Suite II, the latest certified version of
the IWR Planning Suite Software used to conduct Cost-Effectiveness and Incremental
Cost Analyses and Annualize Ecosystem Outputs for ecosystem restoration, impact
analysis, and mitigation planning. The webinar highlighted the new capabilities of IWR
Planning Suite II, including multi-criteria decision analysis (MCDA), uncertainty, and
watershed wizard. Additional topics included how the software is used in planning, a brief
review of each module within the software, and instructions on downloading the software.
- Assuring Quality of Planning Models: EC 1105-2-412 Rollout (14 June)
- Information for the field in implementing EC 1105-2-412, Assuring Quality of Planning
Models. This circular established the process and the requirements for assuring the quality of planning models. Per Planning
Bulletin 2013-02 (March 2013), EC 1105-2-412 remains in effect until permanent planning model guidance is issued.