Supply the requested information in questions 12-21 from the foll field notes: o

Question

Supply the requested information in questions 12-21 from the foll field notes: on BS LT C/L M#1 100.00 BRASS CAP IN CONC 1.63 50 0.6 75 27 2 X 2" STAKE PAINTED ORANGE STA. 2+00 72 956.2 3.161 15 30 201010 20 30 00 10 30 15 122 102 30 75 15 9.2 0.15.7 11.1 7.7 4.6 3M#2 BRASS CAP IN CONC. a. 102.35 b. 0.02 c, 101.0 d. 0.00 e. 102.8 Yov CAN TAKE ANSNEE. E-2 12. The profile elevation at Station 1+62.5 13. The elevation of TP #1. 14. The error of closure. 15. The elevation of the centerline at Station 3+00 a. 111.63 b. 98.5 c.107.74 d. 99.0 c. 102.9 16. The elevation of the line of sight to be used to calculate the elevations of Stations 2+25 through 3+00 17. The elevation of Station 2+50 at 15 feet right. 18. The elevation of Station 3+00 at 30 feet left. a. 99.0 b, 111.63 e. 101.6 d. 107.74 e. 102.9 19. The elevation of the line of sight to be used to calculate the elevations of Stations 1400 through 2+00. 20. The clevation at Station 2+00, 21. The elevation at Station 2+25 at 20 feet right

Explanation / Answer

12. c) Elevation = elevation (BM) + BS (BM)) - FS (at 1+62.5) = 100 + 11.63 - 10.6 = 101.03'

13. a) Elevation of TP1 = HI - FS(at TP1) = 111.63 - 9.27 = 102.36'

14. b)

HI = Elev (TP1) + BS at TP1 = 102.36 + 5.39 = 107.75'

Measured Elevation of BM2 = HI - FS at BM2 = 107.75' - 8,73 = 99.02

Error of closure = 99.02 - 99.00 = 0.02

15. e)

Elevation = HI - FS = 107.75 - 4.9 = 102.85'

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