Vol II, Issue 2  February 2006

Navigation System Simulation (NaSS) Design Document
The NaSS Design Document, written by Richard M. Males, PhD, outlines the development of the Navigation System Simulation suite of models. The intent of the NaSS suite of models is to provide data-driven, transparent, non-proprietary, peer-reviewed and USACE-certified models for application by USACE engineers and planners in inland navigation studies and research. Each model is expected to have a modern graphical user interface (GUI) for ease of use and data development. Elements of the NaSS Model Suite include Simulation and/or Optimization Models (System Network Model, Investment Optimization) and Auxiliary Tools (Data Analyzer, Results Analyzer, and Preprocessor). This document is now posted on the NETS web site bookshelf.  

Fact Sheet | Paper (pdf, 446KB)

Spatial Demand Decisions in Pacific Northwest: Mode Choice and Market Areas
NETS researchers Kenneth E. Train, PhD, University of California, Berkeley, and Wesley W. Wilson, PhD, University of Oregon, explore individual transportation demand decisions that form the basis for aggregated demand models that the U.S. Army Corps of Engineers (USACE) use to evaluate infrastructure improvements. This paper reports the results of a survey of shippers located on and off the Columbia-Snake waterway in the Pacific Northwest to estimate shipper level demand decisions. The model addresses the concerns about the current USACE planning models by estimating elasticities rather than assuming them and by allowing the probability of using the river to be explained in terms of the spatial setting of the demander. The survey provides choices made in both revealed and stated preference settings.

Fact Sheet | Paper

NETS Research Proceeds under MOU with ORNL
The Oak Ridge National Laboratory (ORNL) and IWR are collaborating per a Memorandum of Understanding between ORNL, IWR, and the Engineer Research and Development Center (ERDC) to develop new economic techniques and models for inland navigation. ORNL and IWR are currently exploring options for and approaches to incorporating demand elasticity within the Ohio River Navigation Investment Model (ORNIM). ORNIM was developed by ORNL in collaboration with the Great Lakes and Ohio River Division. ORNL also is working with IWR to develop a Regional Routing Model (RRM). RRM represents a new approach to understanding and forecasting the competitive split between inland navigation and the alternatives of rail and truck.

ORNIM Fact SheetRRM Fact Sheet

HarborSym Training Class Positions Open
The March HarborSym training classes in Mobile, Alabama, have 10 students registered, but 2 positions remain open for each class. The two-day classes will be held at the Mobile District offices (109 St. Joseph Street, Mobile, AL) between the hours of 8:00 am to 4:30 pm on March 14-15, 2006 and again on March 16-17, 2006. Please contact Ken Claseman by e-mail at: or at telephone number if you wish to attend. Local hotel and travel information will be provided to participants.

NETS web site:

Download the reader for PDF documents.

Navigation Economic Technologies Program, US Army Corps of Engineers