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Sxibpart A - General 



512.03(b) (2) 



wherever practicable. SCS will make certified wetland determinations 

 available to the U.S. Environmental Protection Agency (EPA) and the 

 U.S. Corps of Engineers (COE) on request. Determinations provided to 

 other agencies must be the same as those provided to ASCS. 



C512.03 Technical changes. 



Technical changes may result from additional research or experience 

 that support changes in the criteria for hydric soils, hydrophytic 

 vegetation, or hydrology. These changes may be determined by 

 interagency technical committees and must be approved by the STC. 

 other technical changes define properties of soils, plants, or 

 hydrology that would cause a soil to be classified as hydric or 

 nonhydric, or would cause a change in the indicator status for a 

 plant, or would provide new information on the hydrology of a site. 

 The changes apolv to determinations made after the date of notice of 

 the change. 



(a) Changes in wetland criteria . Technical changes in the 

 criteria for hydric soils, hydrophytic vegetation, or hydrology often 

 affect policy and procedures in other parts of this manual. Changes 

 that affect policy and procedures throughout the manual will not 

 become effective until the manual is revised amd the changes are 

 incorporated into the policy and procedures. For example, if the 

 length of time for saturation is changed for hydric soils, the change 

 will not be effective until this manual has been amended to include 

 the change. 



(b) Changes in hvdric soil list and hvd ric vegetation indicator 

 status . Technical changes that affect the list of hydric soils or the 

 indicator status of hydrophytic vegetation become effective as soon as 

 the new list of hydric soils or new indicator status for hydrophytic 

 vegetation is published and available to the public. These changes 

 are then incorporated in the Field Office Technical Guide or other 

 documents available at the field office. 



(1) Hydric Soils of the United states is updated annually. 

 The new list becomes effective in January. Field office official 

 lists of hydric soil map iinits will be updated in January to reflect 

 changes. Other technical changes in the field office list of hydric 

 soil map units must be documented and reviewed by the National 

 Technical Center in accordance with Part 512.11 of this manual. The 

 STC is responsible for updating the field office official lists of 

 hydric soils. 



(2) The indicator status of plants must be agreed on by the 

 regional plant committees and published before they are effective for 

 use in wetland determinations. 



512-5 

 (180-V-NFSAM, Second Ed., Amend. 6, May 1991) 



