34 BULLETIN 832, U. S. DEPARTMENT OF AGRICULTURE. 



channel clue to erosion during the interval of time between the above 

 measurements was 23.5 per cent, from which it is seen that the 

 erosion of the channel in this particular instance produced practically 

 no change in the value of n for the channel. The low values of n for 

 the higher stages as compared with the results obtained for the other 

 channels may be attributed to the absence of abrupt changes in 

 cross section and to the freedom from growth and obstructions in 

 the channel. 



HUGGINS CHEEK. 



The Huggins Creek gauging station was located on the single-span 

 highway bridge about 100 yards east of the Mobile & Ohio Railroad, 

 near Finger, Tenn. The slope course was straight, extended down- 

 stream from the gauging station, and was 914 feet long for the first 

 series of experiments and 686 feet long for the second (Plate IX, fig. 2; 

 and figs. 5 E, 6 G, and 6 H). 



The values obtained at Finger (Table 3, measurements 38 to 50) 

 are fairly consistent for all stages and are rather high. This is due 

 to the fact that irregularities and growth in the channel are quite 

 evenly distributed from top to bottom of the channel and to large 

 variations in cross section. This channel is rapidly deteriorating, 

 due to caving of the banks and to growth in the channel, which fact 

 is indicated by the higher values of n obtained during the second 

 period of investigations, 



SUGAR CREEK. 



The gauging station for Sugar Creek was located on a single-span, 

 highway bridge a short distance above the Mobile & Ohio Railroad, 

 and about one-half mile from Henderson. The slope course was 

 located below the bridge and was 669 feet long, the first half of the 

 course being straight and the last half a smooth, easy curve. There 

 was found to be no appreciable difference in the slope as between 

 the curved and straight portions of the slope course. Abrupt changes 

 in the size of the channel occurred along the slope course (figs. 5 F, 

 and 6 I), and the lower portion of the channel was rough and irregu- 

 lar, not having been finished up properly at the time of construction. 

 (See Table 3 for values of n and Plate X, fig. 1, for view of channel.) 



CYPRESS CREEK. 



Gaugings of Cypress Creek were made from the single-span cattle 

 bridge about 200 yards above the highway bridge at Bethel Springs, 

 Tenn. This bridge was located on the slope course, close to the 

 lower end. The slope course was straight and 308 feet in length. 



Values of n for the high stages were not obtained for Cypress 

 Creek. The values obtained (see Table 3, measurements 60 to 62) 

 are high, as is the case on most of the channels at low stages, and are 



