WAVE STABILITY TESTS OF POLOS AND STONE REHABILITATION DESIGNS 

 FOR THE EAST BREAKWATER, CLEVELAND HARBOR, OHIO 



Experimental Model Investigation 



PART I: INTRODUCTION 

 Background 



1. Cleveland Harbor is located at Cleveland, Ohio, about 110 miles* east 

 of Toledo, Ohio, and about 191 miles west of Buffalo, New York (Figure 1). The 

 harbor is protected by a 20,970-ft east breakwater, 6,048-ft west breakwater, 

 and two 1,250-ft arrowhead breakwaters. The easterly 17,970 ft of the east 

 breakwater is a rubble-mound structure with a keyed-and-f itted system of 

 specially shaped armor stone. Using construction techniques and armor stone 

 similar to the original construction, the east breakwater was repaired on 

 numerous occasions between 1927 and 1978. In 1980, the eastern 4,400 ft of 

 the east breakwater was rehabilitated. Two layers of 2-ton unreinforced 

 dolosse were placed on the lakeside of the trunk and around the head. A total 

 of 29,700 dolosse were used during the original construction and 200 addi- 

 tional dolosse were used to repair damage that occurred on the breakwater head 

 during the storm of April 1982. A survey in April 1984 reported that 659 of 

 the 29,900 dolosse had been broken and remained on the structure. 



2. At the present time, the US Army Engineer District, Buffalo (NCB), 

 is planning the rehabilitation of an additional 3,300 ft of the east break- 

 water trunk (Figure 1). Due to breakage observed on the original 2-ton dolos 

 rehabilitation, NCB is proposing the use of either 4-ton dolosse or a 9- to 

 20-ton armor-stone mix on the new rehabilitation work. 



Purposes of Model Study 



3. The purposes of this two-dimensional (2-D) breakwater stability 

 study were to: 



A table of factors for converting non-SI units of measurement to SI 

 (metric) units is presented on page 3- 



