Model Development
Once a tributary has been identified as a priority with input from the state and other interests, the modeling effort is conducted in three stages:

Scoping
The first task of this stage is to compile available data and information about the watershed (e.g., land use data, soil characteristics, hydrologic and hydraulic data, etc.). The next task is to establish a watershed team made up of state, tribal, and local agencies and organizations with interest in soil conservation, non-point source pollution prevention, remediation and navigation to help guide model development and application. The Corps uses this input to determine what modeling tools are most appropriate based on the intended uses and user capabilities. A scoping report is then prepared which describes the proposed model development and technology transfer. In general, the scoping stage is completed in less than a year.

Model Development
In most cases, this program has applied existing models or has used "off the shelf" modeling tools that have been developed by the Corps' district office or its contractors. Where local universities or other federal agencies have existing models that may be utilized, the Corps has provided funding to these organizations to build on existing tools. In some cases, proprietary models have been used in the past; however, this method is not preferred. This program has not been used for research or the development of entirely new modeling tools. As directed by the authorizing legislation, tributary modeling tools must be developed using existing information. This phase of the project is generally completed in a timeframe of one to two years.

Technology Transfer
After a modeling tool has been developed, the Corps holds a technology transfer workshop to provide training to stakeholders from the watershed. Participants are provided the modeling software and user information at no cost. For each tributary, a final report is developed to document modeling activities and information on the watershed obtained through this effort. These technology transfer workshops also facilitate a dialogue on resource issues among diverse groups and, in some cases, foster new partnerships.