The Ordinary High Water Mark (OHWM) is a method used to identify the lateral limits of non-wetland waters. Lichvar and McColley (2008) developed an OHW delineation manual for ephemeral and intermittent streams in the Arid West. Their approach identified key hydrologic, geomorphic, and vegetation indicators useful in OHW delineation.

The Ordinary High Water Mark (OHWM) is an approach for identifying the lateral limits of non-wetland waters. However, determining whether any non-wetland water is...

The Ordinary High Water Mark (OHWM) is a method used to identify the lateral limits of non-wetland waters. Lichvar and McColley (2008) developed an OHW...

2014年7月9日 · Research scientists test and validate the field indicators and methods used in OHWM delineations and explore new tools, techniques, and resources to improve the accuracy, consistency, and...

2017年1月27日 · Include representative ordinary high water mark (OHWM) widths where measured in the field (averages may be acceptable for uniform channel reaches). OHWM widths. must be shown with a...

2006年2月1日 · Delineation of Ordinary High Water (OHW) under the Clean Water Act (CWA) is based on the use of physical features that represent “ordinary” levels of ponding or...

2008年8月1日 · The Ordinary High Water Mark (OHWM) is an approach for identifying the lateral limits of non-wetland waters. However, determining whether any non-wetland water is a jurisdictional “Water of the United States” (WoUS) involves further assessment in accordance with the regulations, case law, and clarifying guidance.

2023年12月1日 · “The term ordinary high water mark means that line on the shore established by the fluctuations of water and indicated by physical characteristics such as clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that...

This is the updated guidance on determining the ordinary high water mark (OHWM) for consistency with the state Shoreline Management Act. This guidance describes the regulatory framework for OHWM determinations and describes methods and field indicators applicable to streams, lakes, tidal waters and associated wetlands.

Under Washington's Shoreline Management Act, the ordinary high water mark (OHWM) is defined as a biological vegetation mark. For locations where the OHWM cannot be found, our Shoreline Master Program guidelines include default elevation lines for tidal and freshwater shorelines. I want to... The ordinary high water mark is defined as: