ANCHOR BUOY 



BOOM 



ANCHOR LINE 



(RECOMMENDED SCOPE 

 7x WATER DEPTH) 



~ 6-8 FT 



ANCHOR CHAIN 



DANFORTH ANCHOR 



Figure 8. Normal configuration for anchoring booms. 



Estuaries and bays are usually affected by tides, which create special 

 problems in containment. The change in direction and flow rate of currents 

 can cause contained oil to move away from the boom and be lost. The best 

 solution is a back-moored boom; that is, oil is allowed to collect in a boom 

 that is deployed in the usual manner and a second boom is then placed on the 

 backside to contain any backflow due to tidal or wind change (Figure 9). 



INITIAL 

 BARRIER 



Figure 9. Back-moored boom technique for containing spilled oil in 

 tidal-influenced estuaries and bays. 



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