Table 19 



Grand Marals Harbor Piers 



Grand Marals, Michigan 



Date(s) Construction and Rehabilitation History 



1883- Construction of 700-ft-long portions of the east and west piers pro- 

 1885 gressed during this time (Figures 51 and 52, Section B) . It was a 

 timber crib structure with a 20.5-ft width and was built on a stone 

 blanket. Stone protection also was included in construction. 



1885- A 1, 112-f t-long portion of the west pier (a timber crib structure) 

 1903 was constructed during this period (Figures 51 and 52, Section A). 

 It was 24.5 ft wide. The structure was built on a stone mattress, 

 and riprap was placed along the sides for toe protection. 



1892 The inner 250-ft-long portion of the east pier and 100-ft-long por- 

 tion of the west pier were completed (Figures 51 and 52, Section C) . 

 These were wood-pile structures filled with sand and stone. They 

 were 12.5 ft wide with crest els of +6 ft Iwd. Stone was placed on 

 the channel side of the structures. 



1893- The outer 745-f t-long portion of the east pier (Figures 51 and 52, 

 1903 Section E) was constructed during this period. This was a 24-ft-wide 

 stone-filled timber crib structure. It was built on stone, and rip- 

 rap was placed on each side of the structure. 



1895- A 5, 770-f t-long timber-pile dike (Figures 51 and 52, Section D) was 

 1898 constructed during this time. It was installed at an el of +4 ft 

 Iwd. 



1905- Stone reinforcement was added along the timber-pile dike built during 

 1907 1895-98. The stone crest was 10 ft wide at an el of +4 ft Iwd. 



1914 Timber crib structures on the west pier (Figures 51 and 52, Sec- 

 tion A) were repaired. Crib walls were repaired with tie rods, and 

 425 tons of crlb-flll stone was Installed In the outer 500-ft portion 

 of the pier. 



1936- Repairs were made to the east and west piers (Figures 51 and 52, Sec- 

 1942 tlon B) . These Included replacing decaying, broken, or missing deck 

 planking and replenishing crlb-flll stone. 



1950- A concrete cap (superstructure) was installed on the east pier (Flg- 

 1951 ures 51 and 52, Section E) . The cap extended to an el of +6 ft Iwd. 



1960 Construction of an 802-ft-long cellular sheet-pile breakwater exten- 

 sion was completed at the lakeward end of the west pier (Figures 51 

 and 52) . The lakeward 307 ft of the structure was constructed with 

 58.9-ft diameter cells, and the remaining portion was built with 



(Continued) 



87 



