Table 22 



Bakers Haulover Inlet Jetties 



Bakers Haulover Inlet, Florida, SAJ 



Date(s) Construction and Rehabilitation History 



1925 A man-made inlet was constructed by local interests. 



1963- Existing steel sheet-pile jetties (private construction, date 

 1964 unknown) had rusted through, and wave action had partially removed 

 sand fill behind them. Loss of this fill caused the collapse of 

 portions of an 8-in. concrete cap on both jetties. The sheet-pile 

 jetties were removed and 150-ft-long rubble-mound jetties were con- 

 structed in their place (Figure 36). The jetty section consisted of 

 1,500- to 2,500-lb and 8- to 12-ton stone for the core and cap, 

 respectively. 12-ton minimum cap stone was placed on the outer 

 50 ft of the jetties. The side slopes were IV: 2H with a crown width 

 and elevation of 10 ft and +7 ft mlw, respectively. The design was 

 based on a wave height of 14 ft and Hudson's slope stability for- 

 mula. The centerline distance between the jetties was about 415 ft, 

 the south jetty being placed about 100 ft south of the sheet-pile 

 jetty. The channel was dredged to -11 ft mlw. Total cost of the 

 jetties and connecting revetments was $417,000. 



1974 The south jetty was extended by non-Federal interests (Bal Harbour 

 Village, no details) with subsequent reimbursement of applicable 

 Federal share of costs. The 735-ft extension consisted of an armor 

 stone jetty capped with concrete. The seaward end curves 90 deg 

 (quarter circle) away from the inlet. 



1985 The north jetty was essentially rebuilt to act as a sand-tight ter- 

 minal groin since the existing jetty would not be effective in main- 

 taining the planned beach renourishment north of, and adjacent to, 

 the jetty. Prior to being rebuilt, an inspection indicated that the 

 jetty had held up well since its construction but that it was inef- 

 fective in retaining sand which passed through it and around its 

 seaward end. A general design memorandum describes the rebuilt 

 jetty (though it appears some design change (s) have occurred) as 

 follows: "a concrete block has been added to the jetty section, 

 which has decreased the amount of rock required substantially." The 

 525-ft-long north jetty had a 425-ft section parallel to, and approx- 

 imately 30 ft north of, the old jetty and a perpendicular section at 

 the seaward end extending away from the channel (Figure 36, inset). 

 The crest elevation of +9 ft mlw along the 425-ft section decreased 

 to 7 ft between the "heel" and "toe" of the 100-ft section. A crest 

 width of 21 ft extended over the innermost 250 ft, decreased to 

 16 ft at the heel, and then remained constant out to the toe. Side 

 slopes were IV: 2H. The jetty section was made up of three layers; 

 the innermost core and foundation layer of 1- to 12-in. stone, and 

 two armor stone layers, an underlayer of 1,200- to 2,000-lb stone 

 and a cover layer of 6- to 12-ton stone. Concrete grout was placed 

 along the inner 300 ft of the jetty, over 15 ft of the crest width, 



(Continued) 

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