WISCONSIN FIELD OFFICE TECHNICAL GUIDE 450-11-TECHNICAL GUIDE

FOTG NOTICE WI-87

 

SUBJECT:  WISCONSIN FIELD OFFICE TECHNICAL GUIDE

Purpose. Revisions to Wisconsin Conservation Practice Standards and Specifications

Explanation of Changes.

 Section IV:  Conservation Practice Standards and Specifications:

 Access Road (Code CPS-560) – Option G in Table 2 was revised to allow a Class III geotextile as opposed to the current Class IV. Class III will serve the intended purpose for drainage and filtration, while the overlying geogrid provides the necessary textile strength properties.

Open Channel (Code CPS-582) – In Cross Section, the first and last bullet in Channel Stability were revised to add “24-hour” for storm frequency. The stability check was revised to state, “… 2 feet per second or less”.

Pond (Code CPS-378) – Page 2, item d. under general criteria was missing the end of the sentence. Page 4, Slope Protection, the TR reference was corrected to 69. Page 7, 4th paragraph was deleted since it was included in material on page 8.

Documentation of Dam Hazard Classification (Code JS-378)- National Engineering Manual Part 520, Subpart C, Dams, requires that all dams be classified according to hazard class and this classification be documented. This case file information will be helpful in limiting agency responsibility if structures would be placed in the downstream dam failure area after construction. Job Sheet 378 was developed to assist staff with this documentation. It is a fill