2. Sampling Locations . 



Sampling was conducted at four stations located on each of six transects 

 that were established perpendicular to the shoreline in the vicinity of the 

 Lexington Harbor (Fig. 2). Transects I and VI were located respectively north 

 and south of the harbor in reference areas outside the immediate influence of 

 the beach nourishment activities; transect II was located immediately north of 

 the harbor in a beach sediment accretion area created by the installation of 

 the harbor's north breakwater; and transects III, IV, and V were located south 

 of the harbor in the area subject to the heaviest erosion. Permanent struc- 

 tures on land (e.g., buildings) were used as reference points to fix the 

 location of each transect. The four stations on each transect were located as 

 follows: st^ition 1 was established on the 0.5-meter depth contour in the zone 

 of potentially heaviest surf action within 3 to 6 meters of the shoreline; 

 station 2 was on the 2-meter depth contour just lakeward of the zone of heav- 

 iest surf action about 90 meters offshore; station 3 was on the 4-meter depth 

 contour about 240 meters offshore; and station 4 was on the 5-meter depth 

 contour about 460 meters offshore. 



3. Sampling Periods . 



Sampling was conducted at all stations on 9 to 1 3 June, 21 to 25 July, 

 and 14 to 21 October 1980 and on 8 to 1 1 June, 13 to 16 July, and 5 October to 

 13 November 1981. The October 1981 sampling period was extended by a series 

 of fall storms which began on 9 October and prevented sampling with the beach 

 seine until 12 and 13 November. The June and July 1980 sampling periods were 

 chosen to document conditions in the study area before the beach nourishment 

 project was conducted in early October 1980. The October 1980 sampling period 

 was chosen to describe conditions immediately after the beach nourishment 

 project was completed. Sampling in 1981 was designed to document the changes 

 and the level of recovery that occurred in the 8 to 1 2 months following 

 completion of the beach nourishment project. 



4. Substrate . 



To characterize the substrate throughout the study area, the lake bottom 

 at each station was observed from the vessel deck vrtienever conditions 

 permitted. The lake bottom was also observed at several locations in the study 

 area using an underwater television system (Video Sciences Incorporated, Model 

 400495). 



Samples of sediment to be used for particle-size determinations were col- 

 lected with a Ponar grab. One grab sample was taken at each of the stations 

 during each of the sampling periods; a total of 1 44 samples were taken. In the 

 laboratory the sediment in each sample was separated into five fractions fol- 

 lowing the techniques for dry sieving in the IBP Handbook No. 16 (Buckhanan, 

 1971). These fractions were fine gravel, 8 to 2 millimeters in diameter 

 (retained by a No. 10 sieve); course sand, 2 to 0.5 millimeter in diameter 

 (retained by a No. 35 sieve); medium sand, 0.5 to 0.25 millimeter in diameter 

 (retained by a No. 60 sieve); fine sand, 0.25 to 0.125 millimeter in diameter 

 (retained by a No. 120 sieve); and very fine sand, 0.125 to 0.062 millimeter 

 in dicuneter (retained by a No. 230 sieve) . Only fractions smaller than 

 8 millimeters in diameter and larger than 0.062 millimeter in diameter 

 were retained for analysis. 



13 



