NRCS FOTG Update: Notice WI-88

WISCONSIN FIELD OFFICE TECHNICAL GUIDE 450-11-TECHNICAL GUIDE

FOTG  NOTICE WI-88

 

SUBJECTWISCONSIN FIELD OFFICE TECHNICAL GUIDE

Purpose. Revisions to Wisconsin Conservation Practice Standards and Specifications

Explanation of Changes.

 Section IV: Conservation Practice Standards and Specifications:

 Alley Cropping (Code CPS-311) – Minor updates to align with national standard.

Brush Management (Code CPS314) Reviewed and updated to reflect current  agency policy and science. Changes also were made to bring the standard up to date on current ecological site descriptions. Added statement to the “purpose” that when standard is applied successively, it facilitates the process to achieve the desired plant community. “Criteria” section was changed to add statement to ensure practice area has the correct plant diversity for the desired plant community after completion.

Building Envelope Improvement (Code CPS-672) – The reference to the American Society of Agricultural and Biological Engineers (ASABE) standard S401.2, “Guidelines for Use of Thermal Insulation in Agricultural Buildings,” has been changed to National Instruction 210-301, “Use of Spray Polyurethane Foam Insulation and Vapor Retarders for Building Envelope Improvement.” The requirements in this instruction supersede ASABE S401.2 where referenced in CPS 672 with respect to spray polyurethane foam regarding fire safety, and vapor retarders requirements for all insulating materials.

Grade Stabilization Structure (Code CPS-410)- Table 2, Design Criteria for Establishing Minimum Capacity of Full-Flow Open Structures Minimum 24-hr design storm (MSE-3 or 4 distribution) frequency was modified to fix a formatting e1Tor in the previous version.

Lined Waterway or Outlet (Code CPS468) – The entire national standard was edited for clarity. Restriction for maximum capacity is removed. Criteria for minimum capacity is modified to include provisions for minima l slopes and downstream conveyance capacities.

Specific “n” values and design criteria are replaced with references to NRCS National Engineering Handbook. References and citations are updated to the current editions.

Prescribed Grazing (Code CPS528) – Reviewed and updated to reflect cun-ent agency policy and science. Changes were made to clarify and recognize the benefits of prescribed grazing on soil health. Clarified “practice description” by adding”… with the intent to achieve specific ecological, economic, and management objectives.” In “purpose,” the concept of plant community “structure” was added when addressing plant communities, and added verbiage identifying the benefits of this practice to soil health.

Saturated Buffer (Code CPS604) – The pen and ink changes clarify the distinction between drainage system capacity and saturated buffer capacity. They also clarify options available for determining drainage system capacity. The changes also modified criteria for minimum saturated buffer design capacity from 15 percent of drainage system capacity to 5 percent of drainage system capacity. Based on DRAINMOD simulations using historical weather data, and typical local soils and drainage systems in Minnesota, Iowa, and Illinois; it was determined that a 5-percent value would be more appropriate as a minimum saturated buffer flow criteria. The remainder of the edits were editorial in nature intended to clarify and simplify the standard.

 

Tree/Shrub Establishment (Code CPS612) The “Purposes” and “Conditions Where Practice Applies” sections were refined. One purpose was added and one purpose removed. The criteria were adjusted to match the changes in purposes. The “Considerations,” “Plans and Specifications,” and “Operations and Maintenance” sections were refined and the references were updated.

The following revisions to the Wisconsin FOTG have been posted on the Wisconsin e-FOTG website:

Remove the following outdated Standards and Specifications from any printed copies of the WI FOTG:

  • Index
  • Alley Cropping (Code CPS-311)
  • Brush Management (Code CPS-314)
  • Building Envelope Improvement (Code CPS-672)
  • Grade Stabilization Structure (Code CPS-410)
  • Lined Waterway or Outlet (Code CPS-468)
  • Prescribed Grazing (Code CPS-528)
  • Saturated Buffer (Code CPS-604)
  • Tree/Shrub Establishment (Code CPS-612)

Add the following Standards and Specifications to anv printed copies of the WI FOTG:

  • Index
  • Alley Cropping (Code CPS-311)
  • Brush Management (Code CPS-314)
  • Building Envelope Improvement (Code CPS-672)
  • Grade Stabilization Structure (Code CPS-410)
  • Lined Waterway or Outlet (Code CPS-468)
  • Prescribed Grazing (Code CPS-52 8)
  • Saturated Buffer (Code CPS-604)
  • Tree/Shrub Establishment(Code CPS-612)

A link to the Wisconsin FOTG is located on the Wisconsin NRCS website at: http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/technical/fotg/

The complete revised standards are also contained in the following link:

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