generally, follows the -7.6-m (-25-ft)^ contour in Village Cove and results in a 

 harbor with 32,375 to 40,470 sq m (8 to 10 acres) of area, and water depths of 5.5 

 to 7.6 m (1 8 to 25 ft) on the lee side of the breakwater. The center line of the 

 detached breakwater makes an interior angle of 75 deg with the main structure at 

 sta 17+00, and provides a 91-m-wide (300-ft-wide) harbor entrance. A 61-m-wide 

 (200-ft-wide) opening between the eastern end of the detached breakwater and the 

 shore is maintained to enhance harbor circulation. Figure 3 is an aerial photograph 

 of the existing St. Paul Harbor. 



Figure 3. Aerial view of St. Paul Harbor 



The main breakwater has a crest elevation (el) of +1 1 .3 m (+37 ft) from 

 sta 7+50 to a point approximately 15.2 m (50 ft) north of the northernmost dock. 

 The remaining portion of the structure has a crest el of +9. 1 m (+30 ft). Armor 

 stone used on the breakwater trunk was 16,330 kg (18 ton), and 21,770-kg (24-ton) 

 armor stone was used on the head. The slope of the trunk is 1V:2H with a 1 V:3H 

 slope around the breakwater head. A roadway was constructed on the lee side of the 

 main breakwater adjacent to the proposed docks. The detached breakwater has a 

 crest el of +5.5 m (+18 ft) with 4,535-kg (5-ton) armor stone placed on a slope of 

 1 V:1.5H. Typical cross sections of the main and detached breakwater trunks are 

 shown in Figure 4. Prior to construction of the 1989 improvements, both two- 

 dimensional (Ward 1988) and three-dimensional (Bottin and Mize 1988) hydraulic 

 model investigations were conducted at WES to optimize the structural and 

 functional design of the harbor. 



' All contours and elevations cited herein are in meters (feet) referred to mean lower low water (mllw) 

 unless otherwise noted. 



Chapter 1 Introduction 



