This document contains a summary of construction progress for pipe culverts, box culverts, and bridges during the month of February. For pipe culverts, work included excavation, concrete pouring, and backfilling at several locations between km 36.859 to 31.249. For box culverts, formwork and concrete work was completed at km 22.824, 21.566, and 9.115. For bridges, concrete work continued on the second lift of an abutment at km 4.843 and the bearing beam capping of another abutment.

1. Gauff Ingenieure
Internal Report 1/5 Signature

2. Gauff Ingenieure
PIPE CULVERTS COMPLETED DURING THE MONTH OF FEBRUARY.
- Surround:-km 36.859
- Bed and surround – 35.579 (1x900mm diameter),32.740 (1x900mm diameter), 31.249 (2x1200mm
diameter)
BOX CULVERTS COMPLETED DURING THE MONTH.
- Top deck – km 21.824
- Bottom slab and Top deck:- km 21.566/9.115
BRIDGES COMPLETED DURING THE MONTH.
- Walling/Shaft:- km-4.843(2nd
lift abutment 2)/ 52.160 (Abutment 1 and 2, Pier head capping 1
- Top deck:-NILL
Internal Report 2/5 Signature

3. Gauff Ingenieure
STRUCTURAL BRIEF FOR THE MONTH OF FEBRUARY
BILL No 8. Culverts and drainage works.
Pipe culverts
Km 36.859(2x1200mm)
- Formwork erection for surround, wing walls and head walls including and pouring of concrete class
25/20.
- Stripping of formwork for wing walls, head beam and surround.
- Back filling both sides of access pipe culverts 1st to 8th layers
Km 36.573 (1x900mm)
- Excavation, filling under structures and pouring of blinding concrete
- Fixing of formwork for bottom slab including Pouring of concrete class 25/20.
- Formwork erection for surround, wing walls and head walls including pouring of concrete for surround
class 25/20.
- Stripping of formwork for wing walls, head beam and surround.
- Backfilling to 7th
layer completed
Km 32.740 (1x900mm)
- Excavation, filling under structures and pouring of blinding concrete
- Fixing of formwork for bottom slab including Pouring of concrete class 25/20.
- Formwork erection for surround, wing walls and head walls including placing of concrete for surround
class 25/20.
- Stripping of formwork for wing walls, head beam and surround.
Km 31.249 (2x1200mm)
- Excavation, filling under structures and pouring of blinding concrete
- Fixing of formwork for bottom slab including Pouring of concrete class 25/20.
- Formwork erection for surround, wing walls and head walls including placing of concrete for surround
class 25/20 Stripping of formwork for wing walls, head beam and surround.
- Stripping of formwork for wing walls, head beam and surround.
Backfilling of completed cross pipe culverts:-
- 39.112/37.075/36.859/36.573/36.294/35.979/35.880
Stone pitching for protection of side slopes to cross pipe culverts
- 50.704/49.206/48.358/48.168/48.138
Setting out of pipe culverts:-
- 27.620/26.160/
Lorry park traffic island and footpath at km 70.880RHS and 70.600LHS (Log logo)
- Setting out of both traffic island and footpath.
- Excavation, placing and concreting of reinforced concrete bollards to the traffic island
- Erection of formwork and fixing reinforcements BRC MeshA252 double layer to the base of both traffic
island and footpath.
- Pouring of concrete class 25/20 to traffic island and footpath, curing and removal of formwork.
Box culverts
- Stone pitching and gabion protection works completed on the following box culverts:-
55.659/55.742/55.820/54.398/54.718/64.880/64.956/61.171/61.376/54.718/54.398/63.350.
- Stone pitching and gabion protection in progress at km 67.050
Internal Report 3/5 Signature

4. Gauff Ingenieure
Km 30.675 (5cell 3.0x2.5m).
- Backfilling to both sides of walls and wing walls side (1st
and 12th
layer.)
Km 29.658(2 cell 2.0x1.5m).
- Backfilling to both sides of walls and wing walls side (1st
and 8th
layer.)
Km 0.447 (3 cell 3.0x2.0m)
- Removal of existing Armco pipe culvert
- Setting out and excavation done.
- Back filling of under structures 1 and 2nd
layers done.
Km 1.477 (4 cell 3.0x2.0m)
- Removal of existing Armco/concrete pipe culvert
- Setting out and excavation done.
- Back filling under structures with selected material done (1 Layer)
Km 22.824 (1 cell 3.0x2.0m)
- Formwork erection of shear walls, wing walls, winglets, top deck and headwalls including pouring of
structural concrete class 30/20.
- Removal of external formwork.
Km 21.566 (2 cell 3.0x2.0m)
- Formwork erection for the base slab and pouring of structural concrete class 30/20
- Erection of formwork for shear wall, wing walls, winglets and top deck.
- Pouring of structural concrete class 30/20 for the walls and top deck slab.
- External formwork removal done.
Km 9.115 (2 cell 2.0x1.5m)
- Excavation, backfilling under structures and compaction.
- Pouring of non-structural concrete class 15/20 for blinding
- Erection of formwork for the base lab and pouring of structural concrete class 30/20
- Erection of formwork for the shear walls, wing walls, winglets and top deck including pouring of
structural concrete class 30/20.
BILL No 21. Bridge works
New bridge at km 52.160
- Fixing of formwork, steel for pier head of bridge pier 1 Merille side and placing in position of stainless
dowel including pouring of concrete class 30/20.
- Fixing of formwork, steel reinforcement bars for bearing beam capping/placing in position of stainless
dowel bars, Parapet walls and wing walls for both abutment 1 and 2 including pouring of structural
concrete class 30/20.
New bridge at km 20.600
- NIL
New bridge at km 4.843
- Erection of formwork and fixing of steel reinforcement bars for the 2nd
lift of abutment 2 Marsabit side
Internal Report 4/5 Signature

5. Gauff Ingenieure
and pouring of structural concrete class 30/20
- Erection of formwork and steel reinforcement bars for the bearing beam capping of abutment 2
Marsabit side (3rd
lift)
- Fixing of steel reinforcement bars for the 2nd
lift of abutment 1 Merille side in progress.
-
Internal Report 5/5 Signature

6. Gauff Ingenieure
and pouring of structural concrete class 30/20
- Erection of formwork and steel reinforcement bars for the bearing beam capping of abutment 2
Marsabit side (3rd
lift)
- Fixing of steel reinforcement bars for the 2nd
lift of abutment 1 Merille side in progress.
-
Internal Report 5/5 Signature