RAILROAD LOCATION 229 



per degreee is .03 ft., then, for 8, or a full station, the 

 compensation is .03X8 = .24 ft. The grade on the curve 

 will therefore be the tangent grade minus the compensation, 

 or 1.4302 -.24 = +1.1902 ft. per sta. The P. C. of this 

 curve is at Sta. 29, the P. T. at Sta. 33, making the total 

 length of the curve 400 ft. = 4 Sta. The grade on this curve 

 is +1.1902 ft. per sta. and the total rise on the curve is 

 1.1902X4 = 4.7608 ft. The elevation of the grade at the 

 P. C. at Sta. 29 is 122.8604; hence, the elevation of grade at 

 the P. T. at Sta. 33 is 122.8604 + 4.7608=127.6212 ft., which 

 is recorded on the profile together with the grade, namely, 

 + 1.1902, written above the grade line. The P. C. of the 

 next curve is at Sta. 37+50, giving an intermediate tangent 

 of 450 ft. = 4.5 Sta. The grade for tangents is +1.4302 ft. 

 per sta.; hence, the total rise on the tangent is 1.4302X4.5 

 = 6.4359 ft. Adding 6.4359 ft., to 127.6212 ft., the elevation 

 of grade at Sta. 37+50 is found to be 134.0571 ft., which is 

 recorded on the profile, together with the rate of grade for 

 tangents. 



The next curve is 6, and the compensation in grade per 

 station is. 03 f t. X 6 =.18 ft. The grade on this curve will 

 therefore be 1.4302 . 18 = 1.2502 ft. per sta. The length of the 

 curve is 450 ft. =4.5 Sta., and the total rise in grade on this 

 curve is +1.2502 ft. X 4.5 = 5.6259 ft. The elevation of the 

 grade at Sta. 37+50, the P. C. of the curve, is 134.0571. The 

 elevation of the grade at Sta. 42, the P. T., is therefore 134.0571 

 + 5.6259 = 139.683 ft., which is recorded on the profile together 

 with the rate of grade on the 6 curve, namely, +1.2502. The 

 P. C. of the next curve is at Sta. 44+25, giving an intermediate 

 tangent of 225 ft. = 2.25 Sta. The total rise on the tangent is 

 therefore, 1.4302X2.25 = 3.21795 ft. The elevation of grade 

 at the P. T. at Sta. 42 is 139.683; therefore, the elevation 

 of grade at Sta. 44+25 is 139.683 + 3.21795 = 142.90095 ft., 

 which is recorded on the profile together with the grade 

 + 1.4302. 



The last curve is 9, and the compensation in grade per 

 station is .03 X 9 = .27 ft. The grade on this curve is there- 

 fore 1.4302 -.27 = 1.1 602 ft. per sta. The length of the 

 curve is 550 ft. = 5.5 Sta., and the total rise on the curve is 



