Spoil placement. 



D-19 In construction of the access canal all spoil shall be placed 

 in a continuous levee along both sides of the excavation so as 

 to provide closed system. 



D-22 To pile the spoil to a height of less than 0.9 (3 ft) above 



water, so that with slumping, drying, and subsidence, the final 



spoil height should be at a maximum elevation of less than 0.6 m 

 (2 ft) above low (summer) water levels. 



D-23 When dredging channels through open waters spoil should be 



placed in separated spoil dumps on both sides of the channel so 

 as not to be continuous. Placement should be to allow freedom 

 to water movement and movement of aquatic organisms. 



D-24 Spoil may be pumped into deeper lakes and ponds to create marsh 

 habitat or to form small islands. Final configuration of such 

 dumps or spoil islands should be as low, circular islands, 33 

 to 66 m (200 to 200 ft) in diameter separated by 10 to 16 m (30 

 to 50 ft) of open water. 



D-25 The permittee will remove any spoil placed during operations 



provided it is later found that the referenced spoil is detrimen- 

 tal, from the standpoint of the refuge, to the normal flow of 

 water. 



Surface damage. 



D-4P In order to minimize habitat and resource loss, work crews and 

 support vehicles/equipment are confined to the immediate con- 

 struction site at all times unless otherwise approved in writing 

 by the land manager. 



D-5P Permittee shall report in writing to the land manager unantic- 

 ipated damages to waterflow regimes, vegetation, wildlife, and 

 all other physical, biological, or chemical elements of the 

 refuge. At the option of, and in a manner determined by, the 

 land manager, the damages will be repaired to his satisfaction 

 immediately following completion of the canal. All costs are 

 to be borne by the permittee. 



■7P Permittee shall undertake measures, to the extent and in a 

 manner determined by the land manager, to conserve resources 

 and minimize turbidity/erosion problems. 



383 



