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Metric 1596: # of unanchored rocks/boulder structures installed for both stabilization and complexity - Published

Basics

Metric Type ID:

1596

Metric Name:

# of unanchored rocks/boulder structures installed for both stabilization and complexity

Metric Unit Type:

number

Is Numeric:

Yes

Precision:

1.0

Metric Guidance

Metric Guidance ID	Description	Used on Work Elements
233	Enter the quantity of unanchored rock/boulders used for both complexity and stabilization of the stream channel or bank. (Note: If unanchored rock/boulders are not used, enter a "0" for the value of the metric.) -Unanchored rocks/boulders: Addition of large rocks or boulders (non-gabion) as discrete structures to a stream channel or bank that are not secured to withstand movement under high flows. (Note: rocks and boulders used to anchor structures are not captured under this metric.) -Both: The structure serves as both an instream complexity and a bank or channel stabilizing structure.	29

Work Elements That Use This Metric

1 Work Element Associated With Metric 1596: # of unanchored rocks/boulder structures installed for both stabilization and complexity

Work Element	Work Element Association Status	Description	FY Start	FY End	Guidance ID	Guidance	Required / Optional	Is Activated By Default	Included in PI	Supports PCSRF/PNSHP (Katz)	PNSHP Metric Code	PNSHP Metric
29. Increase Aquatic and/or Floodplain Complexity	Active	This work element is intended for the placement of natural materials in the water or on the floodplain to create habitat features or improve channel morphology. Actions include placement of large woody debris (LWD), constructed riffle features, boulder placements, and beaver dam analogs (BDAs). It also includes placing gravel to improve complexity by creating pools or fish spawning habitat. Complexity structures are typically used in stream reaches with limited natural tendencies to foster development of, or ability to maintain, natural habitat features. For example, structures are often placed to improve habitat variability for fish in otherwise uniform flow conditions. These actions can have the objectives of creating and/or maintaining scour pools, influencing channel sinuosity and hydraulic complexity, recruiting and retaining wood and gravel, sorting of gravels, and supporting hydrologic connectivity with the floodplain. Design review should be at 80% completion before contracting to help assure implementation and expenditure of contracted funds. When this WE is used, the contract must also include 175. Produce Design . If structures are being added to resolve a fish passage barrier, use 184. Install Fish Passage Structure . If maintaining an existing structure, use 186. Operate and Maintain Habitat/Passage/Structure . If work involves only plantings, use 47. Plant Vegetation . If other methods are used to control erosion in the riparian and upland zones, use 55. Erosion and Sedimentation Control . This work element should not be used for bank stabilization unless it is part of a larger habitat or complexity action.	2011		233	Enter the quantity of unanchored rock/boulders used for both complexity and stabilization of the stream channel or bank. (Note: If unanchored rock/boulders are not used, enter a "0" for the value of the metric.) -Unanchored rocks/boulders: Addition of large rocks or boulders (non-gabion) as discrete structures to a stream channel or bank that are not secured to withstand movement under high flows. (Note: rocks and boulders used to anchor structures are not captured under this metric.) -Both: The structure serves as both an instream complexity and a bank or channel stabilizing structure.	Required	Yes	Yes	No
ITS Action Category: Stream/Habitat Complexity ITS Metric: LWD/boulder/rock weir placement

Rationale:

Associated Measures

Measure	HLI
structures installed

PCSRF/PNSHP (Katz)

Supports PCSRF/PNSHP (Katz):

Summary

Please correct the errors noted below.