US Army Corps of Engineers
Galveston District

Wetland Functional Assessments

SWG Forested Riverine iHGM The Forested Riverine iHGM model is limited to forested wetlands that are located along floodplains and/or floodways located along riverine system. These wetlands share a surface hydrology connection with the waters of the riverine system at least for a portion of the season. This model should be used for a rapid non-controversial estimate of the potential impacts to forested riparian wetlands and to see if the proposed mitigation will adequately address the wetland functions that are being impacted.

SWG Herbaceous Riverine iHGM  The Herbaceous Riverine iHGM model is limityed to herbaceous wetlands that are located along floodplains and/or floodways located along a riverine system. These wetlands share a surface hydrology connection with the waters of the riverine system for at least a portion of the season. This model is to be used for a rapid non-controversial estimate of the potential impacts to herbaceous riparian wetlands and to see if the proposed mitigation will adequately address the wetland functions that are being impacted.

SWG Tidal Fringe iHGM The Tidal Fringe iHGM is limited to the tidally influenced wetlands in the Galveston District. This model is to be used for a rapid non-controversial estimate of the potential impacts to tidally influenced wetlands and to see if the proposed mitigation will adequately address the wetland functions that are being impacted.

SWG Lacustrine iHGM The Lacustrine iHGM model is designed to be used in wetlands found in the lakes of Texas. A lake is defined as a body of open water that greater than 5-acres in size. This model is to be used for a rapid non-controversial estimate of the potential impacts to lacustrine wetlands and to verify that the proposed mitigation will adequately compensate for the wetland functions that are being impacted.

Stream Functional Assessments

Level 1 - Stream Condition Assessment Procedure For All Ephemeral and Intermittent Streams and for Impacts less than 500 Linear Feet to Intermittent Streams with Perennial Pools, Perennial Streams and Wadeable Rivers

Level 2 - Currently Under Developement. Use Level 1 during the interim.

Level 3 - Currently Under Development.  Use Level 1 during the interim.