Struc- 

 ture Structure Date 

 Type & Construction Length of Improve- 

 Table Location No.* Materials** ft Origin mentt 



Lake Superior 



1 Grand Marais B(3) TC,S,C,CC 1,719 1883 M 



Harbor, Minn. 



2 Two Harbors, Minn. B(2) TC.S.CC 2,528 1893 M 



3 Knife River Harbor, B(2) TC,S,TD 245 1957 M 



Minn. 



4 Duluth-Superior B(2) TC,S,C,CC,SSP 13,650 1898 R 



Harbor, Minn, and P(4) 

 Wis. 



5 Port Wing Harbor, P(2) WP,S,CC,SSP 1,806 1903 R 



Wis. 



6 Cornucopia Harbor, P(2) WP,SSP,S,CSSP 1,468 1957 N 



Wis. 



7 Bayfield Harbor, B(2) CSSP,S 242 1936 N 



Wis. 



8 La Pointe Harbor, B(l) CSSP,S,SSP 200 1967 N 



Wis. 



9 Ashland Harbor, B(l) TC.S.CC 8,000 1889 N 



Wis. 



10 Saxon Harbor, Wis. B(2) S.SSP.CSSP 1,033 1965 N 



11 Black River Harbor, B(2) S 1,380 1957 N 



Mich. 



12 Ontonagon Harbor, P(2) TC,S,WP,SSP, 4,782 1868 N 



Mich. C.CC 



(Continued) 



* Type (B - breakwater, J - jetty, and P - pier) and number of structures 



(i.e., B(3) indicates 3 breakwaters). 

 ** C - concrete, CC - concrete cap, S - stone, TD - timber deck, TC - timber 



crib, WP - wood piling, CSSP - cellular steel sheet pile, SSP - steel sheet 



pile, 

 t M - modification, R - rehabilitation, N - none, D - dolosse, Z-W - Z-wall, 



G - Gabion, SP - Sta-pod. 



(Sheet 1 of 8) 

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