Problem 1 (20 points)

A BM 100 in a table below has the elevation of 177.77 ft. Use rise and fall method to reduce the

set of differential leveling notes and perform the arithmetic check. If the total distance covered

during surveying is 1,500 ft. and the BM 250 elevation is 191.40 ft., at what order of survey do the

results qualify?

Station

BM 100

TP 1

0+00

0+50

0+61.48

1+00

TP 2

1+50

2+00

BM 250

BS

8.27

9.21

7.33

IS

11.30

9.60

8.71

6.10

5.50

4.97

FS

2.60

4.66

3.88

BS = Backsight reading, IS = Intermediate reading, FS = Foresight reading, BM = Bench Mark,

and TP = Turning Point