LEGEND 

 -o Average Rate (mpy) 



• Maximum Rate (mpy) 



□ Sample 2 feet above MHW 



Alomeda , Calif, 



..^..- 



Corrosion Rate (Mils /Year) 



Figure 6. Corrosion rates of unprotectea steel piling at Boston 

 and Alameda. (After Brouillette and Hanna, I960) 



