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1. BRIDGE SITE
SURVEY

2.  Linear Measurement B D
From A to C
4.885+3.400 = 8.285
From C to A
4.690+3.596 = 8.286
Error = 0.001
Average = 8.2855
Precision = 1 in 8285.5m
From B to D
2.535+5.990 = 8.525
From D to B
4.960+3.563 = 8.523
Error = 0.002
Average = 8.524
Precision = 1 in 4265m
Downstream Upstream
C A
Fig:- Bridge site Survey
 Reciprocal Levelling  Fly Levelling
Measured by: Suman Jyoti Computed by: Suman Jyoti Checked by:………..

3. MADAN ASHRITMEMORIALTECHNICALSCHOOL
Kageshwori Manahara, Kathmandu
THEODOLITE FIELD OBSERVATION SHEET
SURVEY CAMP – 2017
Instrument at:- A Height of Instrument:-…..
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
C L 0° 00' 00''
90° 10' 10''
B L 90° 10' 10'' 90° 10' 10''
B R 270° 10' 10''
C R 180° 00' 00'' 90° 10' 10''
Instrument at:- 𝑨 Height of Instrument:-…..
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
C L 0° 00' 00''
127° 27' 50''
D L 127° 27' 50'' 127° 27' 50''
D R 307° 27' 50''
C R 180° 00' 00'' 127° 27' 50''
Instrument at:- 𝑩 Height of Instrument:-…..
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
D L 0° 00' 00''
73° 19' 15''
A L 73° 19' 10'' 73° 19' 10''
A R 253° 19' 20''
D R 180° 00' 00'' 73° 19' 20''
Instrument at:- B Height of Instrument:-…..
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
D L 0° 00' 00''
105° 18' 45''
C L 105° 18' 50'' 105° 18' 50''
C R 285° 18' 50''
D R 180° 00' 10'' 105° 18' 40''
Instrument at:- D Height of Instrument:-….
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
B L 0° 00' 00''
69° 23' 10''
A L 69° 23' 10'' 69° 23' 10''
A R 249° 23' 10''
B R 180° 00' 00'' 69° 23' 10''
Measured by: Suman Jyoti Computed by: Suman Jyoti Checked by:……………………..

4. MADAN ASHRITMEMORIALTECHNICALSCHOOL
Kageshwori Manahara, Kathmandu
THEODOLITE FIELD OBSERVATION SHEET
SURVEY CAMP – 2017
Instrument at:- C Height of Instrument:-….
Sighted
To
Face HCR HA Mean H.A
Remarks0 ' '' 0 ' '' 0 ' ''
B L 0° 00' 00''
57° 50' 35''
A L 57° 50' 30'' 57° 50' 30''
A R 237° 50' 40''
B R 180° 00' 00'' 57° 50' 40''
 Angular Measurement
⦨CAB = 90°10'10''
⦨CAD = 127°27'50''
⦨ABD = 73°19'15''
⦨CBD = 105°18'50''
⦨BAD = 37°17'40''
⦨ADB= 69°23'10''
⦨ABC = 31°59'40''
⦨ACB = 57°50'30''
Sum of ⧍CAB = 180°00'20'' and Sum of ⧍ABD = 180°00'05''
Now,
By using sine law:-
At ⧍ABD,
𝑨𝑩
𝑺𝒊𝒏 𝑫
=
𝑩𝑫
𝑺𝒊𝒏 𝑨
𝑨𝑩
𝑺𝒊𝒏 𝟔𝟗°𝟐𝟑′𝟏𝟎′′
=
𝟖.𝟓𝟐𝟒
𝑺𝒊𝒏 𝟑𝟕°𝟏𝟕′𝟒𝟎′′
AB = 13.1673 m
At ⧍ABC,
𝑨𝑩
𝑺𝒊𝒏 𝑫
=
𝑨𝑪
𝑺𝒊𝒏 𝑩
𝑨𝑩
𝑺𝒊𝒏 𝟔𝟗°𝟐𝟑′𝟏𝟎′′
=
𝟖.𝟐𝟖𝟓𝟓
𝑺𝒊𝒏 𝟑𝟏°𝟓𝟗′𝟒𝟎′′
AB = 14.636 m
Thus, Mean distance of estimated bridge =13.902 m
Measured by: Suman Jyoti Computed by: Suman Jyoti Checked by:……………………..