representing 54 percent of the entire armor layer stone. The harbor-side 

 and lake-side portions of the breakwater received approximately the same 

 proportions of stone. Burns Harbor was originally monitored during the 

 period 1985 through 1989; however, detailed, quantifiable positions of the 

 above-water breakwater armor stone were not obtained. The effort stud- 

 ied structural stability, geotechnical stability, and waves and water levels 

 (McGehee et al. 1997). Data collection included site inspections, dive in- 

 spections, side-scan sonar surveys, geotechnical data, and wave and water 

 level data. The north breakwater was monitored under the "Periodic In- 

 spections" work unit of the MCNP program from November 1994 through 

 July 1995. Monitoring consisted of limited ground surveys, aerial photog- 

 raphy, photogrammetric analysis, and a broken armor unit survey (Bottin 

 and Matthews 1996). Detailed topography of the above-water portion of 

 the structure was obtained as well as cross sections along the structure at 

 numerous locations. 



The Burns Harbor north breakwater (Figures 37 and 38) was inspected 

 on 17 June 1998. The elevation of the breakwater was compared to topog- 

 raphy data obtained previously during the photogrammetric analysis. Sec- 

 tions of the structure in which it appeared that low areas existed since the 

 last inspection are shown in the following tabulation. 



X, 



/ / 



Figure 37. Burns Harbor breakwater looking east 



Chapter 2 Project Descriptions and Inspection Results 



33 



