Drainage Structures Design Review

1

Design Review and Construction Supervision of the Upgrading from Gravel to Paved (Bituminous) standard of

Musita -Lumino / Busia -Majanji Road (104 kms)

DRAINAGE STRUCTURES DESIGN REVIEW

By Eng PM Batumbya

Contents 1 Introduction ......................................................................................................................... 5

2 Overview of the Drainage Design Report ............................................................................... 5

2.1 Design Consultant’s categorisation of drainage structures ............................................... 5

2.2 Existing drainage structures ........................................................................................... 5

2.3 BoQ Value of Structures (Series 6000) ............................................................................ 5

2.4 Recommended drainage structures ................................................................................ 6

2.5 Summary of the Design Engineer’s findings: .................................................................... 6

3 Design Review ...................................................................................................................... 7

3.1 Design Review Methodology .......................................................................................... 7

3.2 Summary of the Design Review Consultant’s Field Assessment of the current state of the

existing drainage structures...................................................................................................... 7

3.3 Review of the Standards and /or Departures adopted by the Design Consultant ................ 9

3.3.1 Culvert pipes ............................................................................................................. 9

3.3.2 Box culverts .............................................................................................................. 9

3.3.3 Side drains ................................................................................................................10

3.4 Recommended Drainage structures ...............................................................................10

3.5 Review of the Appropriateness of the Design and Details for the Drainage structures, the

resulting quantities and Completeness of the Designs ...............................................................11

4 Review outcomes ................................................................................................................12

4.1 Major structures re-designed ........................................................................................12

5 Conclusion ..........................................................................................................................13

2

Executive Summary

The design review for the drainage structures is based on the ToR for the Design Review

Consultant’s assignment. The designs were prepared by Smec in association with New Plan. The

procedure for design of road drainage structures in Uganda is set out in the Road Design Manual

Volume 2 Drainage Design, Ministry of Works, Housing and Communications, updated 2010.

This report is based on a review of the (i) Design Report, (ii)the book of drawings, (ii) the

review by the hydrologist/hydraulic specialist and (iv) the relevant references to the MOWT

Road and Bridge Design manuals and guidelines

Review findings

1. Drainage structures have been classified by the design consultant into two categories of

Major and Minor structures with major structures comprising: Bridges, Slab culverts, and Box

culverts. The minor structures are named as: concrete or metallic single or multiple cell openings

and all the road side drainage facilities.

2. Current state of the drainage structures has been established through a field assessment

of cross and side drains. Appendix 1-3.1(a) and Appendix 1-3.1(b) present summary of the

physical and functional state at each chainage. The comparison table below shows the

findings during the design and design review phase respectively:

3

Design Consultant’s findings Design Review Consultant’s findings

1) Poor state of the drainage structures was reported to be a major issue along the road contributing to the road damage;

2) Majority of the facilities were found inadequate 3) Where the length of the pipe culvert lines is shorter

than the road carriageway, the road becomes narrowed in width

4) There are several locations of marshes and swampy stretches through which the road traverses being overtopped during the regular rainy seasons

5) The cover over most of the pipe culverts has been worn off leading to broken culvert pipe lines

6) Inadequate hydraulic capacity has led to the addition of culvert lines alongside existing ones; however, the works have reduced the riding quality of the road without effectively addressing the capacity problem

7) The construction of the drainage structures is poor and regular maintenance is lacking

8) Some of the structures have outlived their service life

9) The poor quality of the elements have led to poor structural capacity of a number of pipe culvert lines.

10) There are no existing bridges on any of the two Musita-Lumino and Busia-Majanji road links

1) Regular or routine maintenance is missing and therefore the asset has deteriorated much more than if there was deliberate road overseer work supported by spot repairs

2) The predominant size of the pipe culverts is 600 mm diameter in concrete; only a few are 900 and none bigger than that.

3) Majority of culvert lines are shorter than the width of the carriageway and the shoulders and thus the road becomes narrower at culvert crossings which reduces riding comfort

4) The majority of culverts are partially blocked while a few are totally blocked by silting and vegetation particularly where the velocities are low.

5) The majority of culverts have adequate cover but a number of lines have very little cover and thus are exposed to damage by the traffic

6) Almost 50% of the culvert lines have missing end structures, making them less safe for motorized traffic especially at high speed

7) The anti-scour structures in the form of aprons and rip rap protection are missing in about 50% of the culverts

8) Where the side drains have been lined using stone pitching, the drainage is evidently efficient

9) There is only one box culvert and it is on the Busia-Majanji road link

3. Recommended drainage structures by the Design Consultant have been indicated and the

table below presents the summary of quantities of the design and design review status:

Design Consultant Design Review

Pipe culverts Quantity Pipe culverts Quantity

Single 900 mm 53 Single 900 m m 29

Twin 900 mm 7 Twin 900 mm 7

Single 1050mm 7 Single 1200 mm 7

Twin 1050mm 1 Twin 1200 mm 3

Single 1200 mm 4

Twin 1200 mm 4

Box culverts Box culverts: 2000 x1500 mm high

2mx2m single cell 6 Single cell 13

3m x2m single cell 3 Twin cell 12

4


4m x2m single cell 4 Triple cell 1

4mx2m twin cell 3

4m x2.5m single cell 3

4m x2.5m twin cell 3

4. The resulting drawings in the design review give an interpretation of the revised hydraulic

structures which were determined through a review by Dr Michael Kizza.

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1 Introduction

The Drainage structures design review is assigned to the Consultant team’s Drainage Engineer. The

review is based on a consideration of the Design Consultant’s “Final Report”, drawings as well as on

information contained in UNRA’s documents for Consultancy Services for Feasibility Study, Detailed

Engineering Design, Tender Assistance and Project Management for Upgrading of Roads to

Bituminous Standards: Lot E Roads. The two relevant ToRs in the assignment for the design review

phase are:

vii. Inspect all drainage structures and design all remedial works or replacement drainage elements

including outfalls

viii. Inspect all bridges, prepare report and design minor repair works

The designs were prepared by Smec in association with New Plan. The procedure for design of road

drainage structures in Uganda is set out in the Road Design Manual Volume 2 Drainage Design, Ministry

of Works, Housing and Communications, updated 2010. The six particular documents that formed the

basis for the review include the following:

1. Detailed Design Report Pkg 1: Road E1.1/E1.2 - Musita-Lumino/Busia-Majanji: Hydrology Report

V1

2. Design Drawings

3. ToR for the Design Review assignment

4. MoW&T 2010 Vol2 Drainage Design Manual

5. The Hydrology/Hydraulics studies Design Review Report by Eng Dr Michael Kizza

6. UNRA Notes on Value Engineering Rev A

2 Overview of the Drainage Design Report

2.1 Design Consultant’s categorisation of drainage structures

The design Consultant classified all drainage structures into two broad categories of major and minor

with major structures comprising: Bridges, Slab culverts, and Box culverts. The minor structures are

named as: concrete or metallic single or multiple cell openings and all the road side drainage facilities.

2.2 Existing drainage structures

The report has presented a summary of the findings by category and state of the existing drainage

structures; however, due to non availability of Appendix 5A, 5B of the Design Report this review could

not readily verify the information contained in the summary.

2.3 BoQ Value of Structures (Series 6000)

The items under structures have been included in the BoQ in line with the MoWT General Specifications

for Road and Bridge Works. The Construction contract document has Ushs 2,659,781,300 as the

quoted price for the Series 6ooo pay items. This design review sets out to design the recommended

structures up to cost estimates using the construction contract rates.

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2.4 Recommended drainage structures

The Design report gives the following summary of culverts and box culverts:

The design review compares elsewhere the Hydrologist’s recommendations with the above.

2.5 Summary of the Design Engineer’s findings:

The design reviewer has read the design Consultant’s findings including a summary on page 38 in the

Final Design Report and below is the design review’s understanding of the situation at the time of

design phase:

1) Poor state of the drainage structures was reported to be a major issue along the road

contributing to the road damage;

2) Majority of the facilities were found inadequate

3) There are several locations of marshes and swampy stretches through which the road

traverses being overtopped during the regular rainy seasons

4) Inadequate hydraulic capacity has led to the addition of culvert lines alongside existing ones;

however, the works have reduced the riding quality of the road without effectively addressing

the capacity problem


6) Where the length of the pipe culvert lines is shorter than the road carriageway, the road

becomes narrowed in width



9) The poor quality of the elements have led to poor structural capacity of a number of pipe

culvert lines.


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3 Design Review

3.1 Design Review Methodology

This review is firstly aimed at presenting the current state of functionality and structural integrity of

the existing structures (as highlighted in the foregoing section), and, secondly highlights the Review

Consultant’s findings regarding the proposed designs of the drainage structures on Musita-

Lumino/Busia-Majanj/Busia_Majanji road. Therefore the aspects considered in this review include:

1) Summary of the Design Review Consultant’s field assessment of the current state of the

existing drainage structures

2) Review of the standards and /or departures adopted by the Design Consultant

3) Review of the appropriateness of the design and details for the drainage structures, the

resulting quantities and completeness of the designs

3.2 Summary of the Design Review Consultant’s Field Assessment of the current state of

the existing drainage structures

The field assessment was conducted through physical visual observation and measurements from the

start to the end of the project road. The assessment focused on: physical condition and cause of

deterioration/damage, and possible improvements for traffic safety. The two tables in 1/ 3.1 presents

a summary of the findings with photographic evidence for the two road links (Musita-Lumino and

Busia-Majanji); however, the following is a snapshot of the findings:

1) The predominant size of the pipe culverts is 600 mm diameter in concrete; only a few are 900

and none bigger than that.

2) Majority of culvert lines are shorter than the width of the carriageway and the shoulders and

thus the road becomes narrower at culvert crossings which reduces riding comfort

3) The majority of culverts have adequate cover but a number of lines have very little cover and

thus are exposed to damage by the traffic

4) Almost 50% of the culvert lines have missing end structures, making them less safe for

motorized traffic especially at high speed

5) The majority of culverts are partially blocked while a few are totally blocked by silting and

vegetation particularly where the velocities are low.

6) The anti-scour structures in the form of aprons and rip rap protection are missing in about 50%

of the culverts

7) Regular or routine maintenance is missing and therefore the asset has deteriorated much

more than if there was deliberate road overseer work supported by spot repairs



The table 3.1 below hence summarises and compares the findings by the design consultant and the

design review consultant.

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Table 3.1 Comparison of Current State of Existing Structures

Design Consultant’s findings Design Review Consultant’s findings

11) Poor state of the drainage structures was reported to be a major issue along the road contributing to the road damage;

12) Majority of the facilities were found inadequate 13) Where the length of the pipe culvert lines is shorter

than the road carriageway, the road becomes narrowed in width

14) There are several locations of marshes and swampy stretches through which the road traverses being overtopped during the regular rainy seasons


16) Inadequate hydraulic capacity has led to the addition of culvert lines alongside existing ones; however, the works have reduced the riding quality of the road without effectively addressing the capacity problem



19) The poor quality of the elements have led to poor structural capacity of a number of pipe culvert lines.


10) Regular or routine maintenance is missing and therefore the asset has deteriorated much more than if there was deliberate road overseer work supported by spot repairs

11) The predominant size of the pipe culverts is 600 mm diameter in concrete; only a few are 900 and none bigger than that.

12) Majority of culvert lines are shorter than the width of the carriageway and the shoulders and thus the road becomes narrower at culvert crossings which reduces riding comfort

13) The majority of culverts are partially blocked while a few are totally blocked by silting and vegetation particularly where the velocities are low.

14) The majority of culverts have adequate cover but a number of lines have very little cover and thus are exposed to damage by the traffic

15) Almost 50% of the culvert lines have missing end structures, making them less safe for motorized traffic especially at high speed

16) The anti-scour structures in the form of aprons and rip rap protection are missing in about 50% of the culverts



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3.3 Review of the Standards and /or Departures adopted by the Design Consultant

3.3.1 Culvert pipes

The design review is not focused on interrogating the design Consultant’s design philosophy or

efficiency of the structures as this is the domain of the design review hydrology/hydraulic specialist.

This review is for examining and reporting on the structural designs and details comparing them with

standard guidelines and best practice.

3.3.1.1 Minimum and Maximum Size set

The design has adopted 900 mm diam as the minimum size for the concrete cross and relief culverts

based on UNRA guidelines. This is commendable since any size below 900 mm diameter presents

maintenance problems as smaller sizes require more regular maintenance to stay efficient; moreover,

numerous lines may be required to be clustered to meet the hydraulic capacity at a given water body

crossing.

The review has shown that the design does not use culverts bigger than 1200 mm diam, preferring to

use box culverts for bigger structures. This is commendable

3.3.1.1.1 Pipe Bedding

The design adopts three standards for bedding namely Class A, B and C and leaves the use of one or

the other to the supervising consultant based on the nature of the foundation material encountered.

3.3.1.2 Material for Headwall set

The design uses solely concrete headwall for the culvert pipe ends, the relatively higher cost than if

stone or concrete block / brick masonry was adopted notwithstanding. The designer has justified his

decision based on two major considerations namely:

1) That concrete is a better quality material than brick or stone masonry, and

2) That UNRA had recommended use of concrete.

It is true that concrete for headwall and other end structures has superior properties and quality and

the design review designs have also adopted the same material.

3.3.1.2.1 Flare Angle of Wingwall

The design has set 450 as flare angle as recommended by MOWT Road and Bridge design Vol. 2

Drainage Design Guidelines for culverts up to 1200 mm diameter.

3.3.1.3 Drop Inlet

The design has prepared a sound solution for a drop inlet. The bottom and side walls are made of

concrete grade 25/20 reinforced with rebars. The details are found to be sufficient to enable the

contractor to prepare shop/production drawings.

3.3.2 Box culverts

The designer adopted a single size (2000mm) for the inner cell width and 1300 mm as internal clear

height. The hydrology/hydraulic design reviewer has extensively examined and reported on the

original designs.

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3.3.2.1 Detailing

The design presents a single cell, double cell and triple cell box culvert, very well detailed. This review

finds the structural design and detailing of the barrel, wingwalls at a 300 flare recommended by UNRA,

head wall, and apron adequate; however, in line with the design review, a completely different size of

culvert module has been adopted.

3.3.3 Side drains

3.3.3.1 Urban/Trading Centres Drain type

The approach adopted by the design consultant was to use a rectangular section concrete side drain

in trading centres. Where side /service roads have been designed the drainage is enhanced by curb

openings to enable water to flow from the main road across on to the service road and into the drain.

A cast iron grating is proposed for pedestrian crossing.

3.3.3.2 Rural drains

Three types have been adopted. All of them are lined using stone pitching and comprise:

Type A –paved channel gutter which essentially is a 1000 mm wide inclined flat gutter with a rock

masonry at the far end.

Type B- paved channel, 1000 mm wide for flows exceeding the erosion velocity or where the slope

exceeds 3%.

Type C- Trapezoidal channel with a 500 mm wide base.

It is noted that the design does not explicitly include unlined side drains. These are useful as mitre

drains or offshoots and as main channels in rolling terrain.

3.4 Recommended Drainage structures

Section 2.4 above shows the design consultant’s summary of drainage structures. Herebelow is a

summary by number of lines of the same based on the design review:

Table 3.2: Summary by number of lines for the pipe and box culverts

Drainage Structure Musita-Lumino Busia-Majanji

Pipe Culverts

Single 900 mm dia 13 16

Double 900 mm dia 5 2

Single 1200 mm dia 5 2

Double 1200 mm dia 3 -

Box culverts 2000x1500 high

Single cell 9 4

Double cell 10 2

Triple cell 1 -

The design review demonstrates a significant difference in the overall quantities of the pipe culverts

and box culverts from the original design as in the comparison table below:

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Table 3.3: Comparison of original and design review quantities of pipe and box culverts


Pipe culverts Quantity Pipe culverts Quantity

Single 900 mm 53 Single 900 m m 29

Twin 900 mm 7 Twin 900 mm 7

Single 1050mm 7 Single 1200 mm 7

Twin 1050mm 1 Twin 1200 mm 3

Single 1200 mm 4

Twin 1200 mm 4

Box culverts Box culverts: 2000 x1500 mm high

2mx2m single cell 6 Single cell 13

3m x2m single cell 3 Twin cell 12

4m x2m single cell 4 Triple cell 1

4mx2m twin cell 3

4m x2.5m single cell 3

4m x2.5m twin cell 3

3.5 Review of the Appropriateness of the Design and Details for the Drainage structures, the

resulting quantities and Completeness of the Designs

The design review has established that the original designs are well prepared and are able to give

sufficient information for the contractor to prepare production drawings for the drainage structures.

A few areas have been identified as having facts that are incorrectly derived as presented in the table

3.4 below.

Table 3.4 Findings on Completeness of Design and Detail of the Drainage structures

Structural element designed by Design Consultant

Major features Remarks

1 900 mm diam Pipe culvert Concrete class 25/20; cover to steel-25 mm; steel single layer of 6mm Diam Mild steel

1. Longitudinal section to be revised to show single layer

2. Quantity of concrete m3/m = 25 3. Quantity of rebars kG/m = 13

2 End structures for pipe culvert Where applicable, drop inlet provided; concrete aprons provided, head wall and wing walls are provided

The detailing is complete

3 Box culvert 2000 x 1500 mm high internal dimensions, endwalls and apron plus riprap outfall

The detailing is complete

4 Rectangular section concrete culvert

Complete with cast iron grating heavy duty

Cast iron grating is vulnerable to vandalism due to high demand of steel products for ingots for steel rolling mills. Recommend concrete covers for sustainability

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4 Review outcomes

Based on the sizes for pipe culverts, box culverts, and concrete lined and stone pitched drains from a

fresh study/investigation by the hydrology/hydraulics review expert Dr Kizza, the drainage engineer

proceeded to prepare fresh drawings for the drainage structures. The full details are presented in the

book of drawings Appendix 1-4.0 and these drawings will be the basis for the overall design review,

cost review and for the contractor to prepare the production drawings.

4.1 Major structures re-designed

The summary of structures by category for Musita-Lumino and Busia-Majanji road links is presented in

the tables1 below:

Musita-Lumino culvert crossings

Lining type Musita-Lumino

Left Drains Right drains Total Percent

Grass 12,588 10,483 23,071 25%

Stone pitching 25,118 26,751 51,869 56%

Concrete 9,640 8,560 18,200 20%

Total 47,346 45,794 93,140 100%

Musita-Lumino side drains

Culvert Size Musita-Lumino

Number Percent

Circular 900mm diameter 26 41%


Box 1.5m high x2.0m wide 20 32%

Total no of crossings 63 100%

Busia-Majanji culvert crossings

Culvert Size Busia-Majanji

Number Percent



Box 1.5m high x2.0m wide 6 23%

Total no of crossings 26 100%

Side drains on Busia-Majanji Road

Lining type Busia-Majanji

Left Drains Right drains Total

Grass 2,829 4,543 7,372

Stone pitching 8,891 8,401 17,292

Concrete 2,420 1,640 4,060

Total 14,140 14,584 28,724

1 Source: Design Review Report by Dr Michael Kizza

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5 Conclusion

1. The design review has examined the original drawings and details of the culverts and box

culverts, as well as drains and the end structures namely headwall, wing wall at 450 and 300

flare, drop inlets, aprons and anti-scour measures. It was established that the steel and the

concrete quantities for the 900 mm diam culvert had been underestimated; secondly the

section shows double layers whereas there should be a single layer of steel fabric.

2. The design for a cast iron grill over the concrete drains in urban /trading centres is found not

recommended on the grounds that these covers would be highly vulnerable to vandalism for

scrap steel. Instead the review has detailed a precast concrete cover.

3. The design review has introduced a 1200 diam concrete culvert

4. The design review has introduced a grass lined or earth drain for rural areas for side drains

and mitres drains / offshoots for section of low velocities.

5. A set of drawings has been prepared as part of this review exercise.

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APPENDIX 1-3.1 (a)

FINDINGS FROM THE FIELD ASSESSMENT OF DRAINAGE STRUCTURES FOR MUSITA -LUMINO ROAD

LINK

CONDITION ASSESSMENT OF THE EXISTING CULVERTS ON MUSITA-LUMINO ROAD LINK

Chainage Physical Condition and proposal for improvement

Description Photographs

0+460 FW Partially blocked by silt and debris. Extend and construct end structures

Cross culvert: 600mmФ concrete pipe culvert, Length 7.9m

0+600 LHS In need of cleaning and

construction of end structures

Access culvert: 600mmФ, Armco pipe culvert Length 5.1m

0+750 RHS In need of

cleaning/desilting and construction of end structures

Access culvert:450mmФ, concrete pipe culvert Length 3.6m

15




0+755 LHS Sound and efficient Access culvert:600mmФ, concrete pipe culvert Length 6.1m

1+600 FW In need of cleaning Cross culvert:

600mmФ concrete pipe culvert, Length 8.2m

1+735 FW In need of repair to

apron Cross culvert: 600mmФ concrete pipe culvert, Length 8.8m

2+560 FW Almost fully silted; in

need of desilting and cleaning of apron


16




3+140 FW This is duct for the high pressure water main

Cross culvert:450mmФ concrete pipe culvert, Length 8.2m

5+020 FW Silted and in need of

desilting and cleaning of the aprons


5+060 FW Partially (50%) silted ;

broken headwall , extend either end and wing walls to be replaced;. regular maintenance of the aprons


5+533 FW Sound ; however in

need o regular maintenance


17




5+540 FW Partially silted; in need of desilting, extension to either end and construction of end structures


6+663 FW

Shorter than carriageway width; over 50% silted and in need of extension to both ends complete with end structures


6+714 FW In need of extension at

either end, construction od end structures and maintenance


6+727 FW Sound but in need of regular maintenance at the aprons


18




6+750 FW Lengthen by extension since being knocked by vehicles, and keep regular maintenance


6+980 FW Sound but needs

regular maintenance Cross culvert:600mmФ concrete pipe culvert, Length 8.0m

7+110 FW Sound but needs

maintenance Cross culvert:600mmФ concrete pipe culvert, Length 8.0m

7+138 FW Extend either end by 1 m Cross

culvert:600mmФ concrete pipe culvert, Length 7.7m

19




7+160 FW Desilt and keep maintenance


10+520 FW Desilt and keep

maintenance , the soil is kept stable by the grass roots


11+261 FW Short but self-cleansing Skew


11+269 FW Self-cleansing Skew


20




11+269 FW Sound state Skew culvert:600mmФ concrete pipe culvert, Length 8.3m

11+465 Sound condition but

needs maintenance Type/material: C.P.C, relief culvert Diameter: 450mm Length: 10.4m Head/wing wall: stone pitched and good condition. Performance: flowing water, vegetation blockage

11+680 Poor maintenance leading to blockage by silt

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.5m Head/wing wall: stoned pitched and good condition. Performance: blocked

21




11+688 End wall repairs needed and regular maintenance lacking

Type/material: C.P.C, relief culvert Diameter: 900mm Length: 8.4m Head/wing wall: concrete and poor condition. Performance: silted

13+150 Sound physical state Type/material: C.P.C, cross culvert Diameter: 450mm Length: 8.4m Head/wing wall: stone pitched and good condition. Performance: flowing water,

14+226 Needs regular maintenance

Type/material: C.P.C, cross culvert Diameter: 600mm double barrel Length: 8.0m Head/wing wall: concrete and good condition. Performance: flowing water but partially blocked

22




14+238 Needs construction of end structures

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 6.9m Head/wing wall: no headwalls. Performance: flowing water

15+870 FW Sound although shorter than carriageway and shoulders by 1 m each end, given that speeds on this stretch are high


16+837 FW Sound but in need of

cleaning; extend by 1 m either end to cater for relatively high speeds on this stretch

Cross culvert 600mmФ C.P.C, Length 7.5m

23




16+956 FW

sound Skew culvert(relief culvert) 600mmФ C.P.C, Length 8.3m

17+920 RHS Sound Access culvert

600mmФ C.P.C Length 5.7m Offset 5.7m

18+170 FW Over 80% silted and

drop inlet needs desilting

Skew culvert(relief culvert) 600mmФ C.P.C, Length 9.1m

18+180 LHS Offshoot draining

water towards Mpungwe Secondary School

24




18+803 FW Partially silted (about 60 to 70%) but strong . needs extension by 1 m at either end to cope with the high speeds and large sugar cane carrying trucks along this stretch


18+810 FW Almost fully silted; to be

desilted and extended by 1 m either end


19+717 FW Sound and clean Cross culvert

,900mmФ C.P.C, Length 8.1m

20+033 RHS Sound end structures

but needs regular maintenance

Access culvert 600mmФ C.P.C Length 7.7m

25




20+886- 20+930 RHS

Outfall needs repair to check scour and gorge formation

Stone pitched drain

Length -44m

Width -1.65m

20+886-

20+911 LHS Needs cleaning Stone pitched drain

Length -25m

Width -1.60m

20+874 RHS Sound Access culvert,

300mmФ C.P.C, Length 6.2m, Offset of 3.3m from new centreline

20+910 FW Inefficient size although

working. This needs replacement

Cross culvert, 450mmФ C.P.C, Length 10.4m

26




21+105 FW Sound but needs cleaning the apron and outfall

Cross culvert

600mmФ C.P.C

Length 8.0m

22+320 FW Sound Cross culvert -

900mmФ C.P.C, Length 8.2m

22+330 FW Over 80% silted and in

need of end structures Cross culvert- 600mmФ C.P.C, Length 8.3m

22+660 RHS Sound Access culvert-

600mmФ C.P.C, Length 6.3m, Offset of 10.5m

27




24+000 FW Sound form Cross culvert, 900mmФ C.P.C, Length 8.1m

25+820 FW Sound form Cross culvert,

900mmФ C.P.C, Length 7.7m

28+655 FW Sound but almost

flowing full barrel Cross culvert, 600mmФ C.P.C, Length 7.6m

28




29+480 FW Sound but in need of end structures to improve safety

Cross culvert, 900mmФ C.P.C, Length 8.2m

29+986 FW Needs desilting Skew (Relief)

culvert, 600mmФ C.P.C, Length 8.6m. Stone pitched head and wing walls. Fully silted

30+903 Needs desilting and

regular maintenance Skew (Relief) culvert, 900mmФ C.P.C, Length 9.2m. Concrete head and wing walls. Partially silted with vegetation blockage

29




31+181 Provide end structures at the outlet to improve safety and efficiency

Relief culvert, 600mmФ C.P.C, Length 9.65m. Stone pitched head and wing walls at the inlet. No head/wing walls at the oulet.

31+975 Provide a rip rap outfall

mat to prevent further scour

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.3m Head/wing wall: stone pitched and in good condition. Performance: no vegetation or sediment blockage

32+335 Further improvement

can be gained by placing rip rap on the toe of the apron

Type/material: C.P.C, relief culvert Diameter: 600mm Length: 10.1m Head/wing wall: stone pitched and in good condition. Performance: no vegetation or sediment blockage

30




32+860 Desilt and exercise regular maintenance

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.0m Head/wing wall: concrete and in good condition. Performance: sediment blockage

33+383 Efficient hydraulics but

improve by wing wall and apron repair with emphasis on riprap or gabion mattress at the outfall

Type/material: C.P.C, relief culvert Diameter: 600mm Length: 9.2m Head/wing wall: stone pitched and broken. Performance: flowing water

34+340 Swamp raising, replace

broken end structure Type/material: C.P.C, cross culvert Diameter: 600mm Length: 6.4m Head/wing wall: stone pitched and broken. Performance: flowing water

31




34+347 Extend the ends by 1 m, construct end structures

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 7.9m No Head/wing wall Performance: flowing water

34+350 Extend outlet end by 1 m

and construct end structures

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 7.9m Head/wing wall at Inlet: stone pitched and good condition. No Head/wing wall at outlet Performance: flowing water

34+461 Sound but I need of

regular maintenance Type/material: C.P.C, cross culvert Diameter: 900mm Length: 8.4m Head/wing wall: stone pitched and good condition. Performance: flowing water, vegetation blockage

32




34+466 Sound form but needs maintenance

Type/material: C.P.C, cross culvert Diameter: 900mm Length: 8.5m Head/wing wall: stone pitched and good condition. Performance: flowing water, vegetation blockage

34+470 Needs river training to

improve flow and end structures

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.4m Head/wing wall at outlet: stone pitched and good condition. No Head/wing wall at intlet Performance: partial sediment blockage

35+823 Sound form Type/material:

C.P.C, skewed relief culvert Diameter: 600mm Length: 17.7m Head/wing wall: brickwork, fair condition. Performance: flowing water, no blockage

33




37+840 Needs desilting Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.0m Head/wing wall: stone pitch, good condition. Performance: flowing water, vegetation and sediment blockage

37+944 Desilt regularly Type/material:

C.P.C, cross culvert Diameter: 600mm Length:7.75m Head/wing wall: stone pitch, good condition. Performance: flowing water, vegetation blockage

38+750 Desilt and repair broken

end structure Type/material: C.P.C, relief culvert Diameter: 600mm Length: 8.0m Head/wing wall: stone pitched, good condition. Performance: flowing water, silted

34




40+003 Desilt Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.0m Head/wing wall: stone pitched, poor condition. Performance: flowing water, partial sediment blockage

40+158 Desilt and repair end

structures for safety Type/material: C.P.C, cross culvert Diameter: 600mm Length: 10.8m Head/wing wall: stone pitched, poor condition. Performance: flowing water, partial sediment blockage

40+268 Needs shoulder

charging to check erosion behind the end structures

Type/material: C.P.C, cross culvert Diameter: 900mm Length: 8.2m Head/wing wall: concrete, poor condition. Performance: flowing water

35




40+254 Desilt Type/material: C.P.C, cross culvert Diameter: 900mm Length: 8.0m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage

42+387 Needs shoulder

recharging, apron Type/material: C.P.C, skewed relief culvert Diameter: 900mm Length: 7.6m Head/wing wall: stone pitched, poor condition. Performance: flowing water, partial sediment blockage

42+540 Clear vegetation Type/material:

C.P.C, cross culvert Diameter: 600mm Length: 7.8m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage, vegatation blockage

36




42+521 Desilt and clear vegetation

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.0m Head/wing wall: concrete, fair condition. Performance: flowing water, partial sediment blockage, vegatation blockage

42+675 Desilt and clear

vegetation Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.2m Head/wing wall: concrete, good condition. Performance: flowing water, partial sediment blockage, vegatation blockage

42+900 Desilt and keep

regularly desilted Type/material: C.P.C, cross culvert Diameter: 600mm Length: 9.4m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage at inlet and full blockage at outlet.

37




43+248 Desilt and keep regularly desilted

Type/material: C.P.C, cross culvert Diameter: 600mm Length: 8.4m Head/wing wall: concrete, good condition. Performance: flowing water, partial sediment blockage at inlet and full blockage at outlet.

43+651 Outfall in need of

strengthening by rip rap or gabion baskets to check undermining of end structure

Type/material: C.P.C, skewed relief culvert Diameter: 600mm Length: 12.3m Head/wing wall: stone pitched, good condition. Performance: flowing water, no blockage

44+075 Provide rip rap for

outfall to reinforce the apron

Type/material: C.P.C, skewed relief culvert Diameter: 600mm Length: 9.3m Head/wing wall: stone pitched, poor condition. Performance: flowing water, no blockage

38




44+826 Desilt and keep regularly maintained

Type/material: C.P.C, skewed relief culvert Diameter: 600mm Length: 11.2m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage

45+125 Repair apron and place

rip rap or gabion mattress to check underscour

Type/material: C.P.C, skewed relief culvert Diameter: 900mm Length: 10.6m Head/wing wall: stone pitched, good condition. Performance: flowing water, no blockage

45+294 Regular maintenance

required Type/material: C.P.C, skewed relief culvert Diameter: 900mm Length: 9.7m Head/wing wall: stone pitched,poor condition. Performance: flowing water, no blockage

39




45+475 Desilt and keep regular maintenance

Type/material: C.P.C, skewed relief culvert Diameter: 900mm Length: 10.2m Head/wing wall: stone pitched, damaged at inlet Performance: flowing water, partial sediment blockage

45+995 Repair outlet end

structure and keep desilted

Type/material: C.P.C, cross culvert No. Of barrells: 2 Diameter: 600mm Length: 10.7m Head/wing wall: stone pitched, damaged at outlet Performance: flowing water, partial sediment blockage, vegetation blockage

47+190 Desilt Type/material: C.P.C, relief culvert No. Of barrells: 2 Diameter: 600mm Length: 6.2m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage

`

40




47+441 Repair damaged end structure at inlet and keep desilted

Type/material: C.P.C, relief culvert Diameter: 600mm Length: 1m Head/wing wall: stone pitched, damaged at inlet Performance: flowing water, partial sediment blockage

47+452 Desilt and extend the outfall

Type/material: C.P.C, relief culvert Diameter: 600mm Length: 6.2m Head/wing wall: stone pitched, good condition. Performance: flowing water, partial sediment blockage

47+796 Sound form Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.1m,

Condition- okay,

Headwall- concrete

41




48+215 Desilt and regular

maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.1m,

Condition- fully

blocked

Headwall- concrete

48+172 Desilt and keep regular

maintenance

Skew culvert:

600mmФ concrete

pipe culvert,

Length 9.7m,

Condition- halfway

blocked

Headwall- concrete


600mmФ concrete

pipe culvert,

Length 7.7m,

Condition- okay

Headwall-stone

pitching

42




49+325 Construct end

structures and desilt

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.9m,

Condition- fully

blocked No

Headwall


900mmФ concrete

pipe culvert,

Length 7.8m,

Condition- okay

Headwall-stone

pitching


maintenance

Cross culvert:

900mmФ concrete

pipe culvert,

Length 8.0m,

Condition- fully

blocked Headwall-

stone pitching

43





maintenance

Skew culvert:

600mmФ metallic

pipe culvert,

Length 9.3m,

Condition- halfway

blocked

Headwall-stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.6m,

Condition- halfway

blocked

Headwall-stone

pitching

52+870 Cut away vegetation,

desilt and keep regular

maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 9.4m,

Condition- halfway

blocked

Headwall-stone

pitching

44





maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.9m,

Condition- halfway

blocked

Headwall-stone

pitching

54+073 Keep desilted regularly Skew culvert:

600mmФ concrete

pipe culvert,

Length 10.0m,

Condition- halfway

blocked

Headwall-stone

pitching

54+088 Keep desilted regularly Cross culvert:

900mmФ concrete

pipe culvert,

Length 7.8m,

Condition- halfway

blocked

Headwall-stone

pitching

45




54+102 Unblock , desilt and

keep regular

maintenance

Cross culvert:

600mmФ metallic

pipe culvert,

Length 10.6m,

Condition- fully

blocked

Headwall-stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- halfway

blocked

Headwall-stone

pitching

56+270 Unblock and keep

desilted

Skew culvert:

600mmФ concrete

pipe culvert,

Length 8.7m,

Condition- fully

blocked

Headwall-stone

pitching

46





maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.5m,

Condition- fully

blocked

Headwall-concrete


desilted regularly

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- fully

blocked

Headwall-stone

pitching

57+855 Raise the cover to the

culvert, unblock and

keep regular

maintenance

Skew culvert:

600mmФ concrete

pipe culvert,

Length 11.7m,

Condition- fully

blocked

Headwall-stone

pitching

47





maintenance

5No.Cross culvert:

(1No.)900mmФ,fun

ctional

(1No.)600mmФ,fun

ctional

(3No.)600mmФ,

fully blocked

concrete pipe

culverts, Length

9.4m,

Headwall-concrete


maintenance

Cross culvert:

900mmФ concrete

pipe culvert,

Length 9.6m,

Condition- halfway

blocked

Headwall-stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.9m,

Condition- halfway

blocked

Headwall-stone

pitching

48





maintenance

Skew culvert:

600mmФ concrete

pipe culvert,

Length 8.8m,

Condition- halfway

blocked

Headwall-

stonepitching

61+700 Construct end

structures for safety and

desilt

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- fully

blocked


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.6m,

Condition- halfway

blocked

Headwall-stone

pitching

49




63+250 Repair the broken

headwall, desilt and

keep regular

maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.6m,

Condition- fully

blocked

Headwall-stone

pitching


600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- okay

Headwall-

stonepitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- halfway

blocked

Headwall-

stonepitching

50




64+800 Remove vegetation,

desilt and keep regular

maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- halfway

blocked, outlet

covered with

vegetation

Headwall-stone

pitching


600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- okay

Headwall-stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.8m,

Condition- fully

blocked

Headwall-stone

pitching

51





600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- okay

Headwall-stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.8m,

Condition- fully

blocked

Headwall-brick

work


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 13.1m,

Condition- fully

blocked

Headwall- concrete

52





maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.1m,

Condition- half way

blocked

Headwall- stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.9m,

Condition- half way

blocked

Headwall- stone

pitching


maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- fully

blocked

Headwall- stone

pitching

53





maintenance

Cross culvert:

600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- fully

blocked

Headwall- stone

pitching

73+320 Sound Cross culvert:

(3No.)900mmФ

(2No.)600mmФ

concrete pipe

culvert, Length

8.1m, Condition-

okay

Headwall- stone

pitching


600mmФ concrete

pipe culvert,

Length 8.0m,

Condition- okay

Headwall- stone

pitching

54




76+115 Unblock, desilt and

repair broken LHS end

structure

Cross culvert:

600mmФ concrete

pipe culvert,

Length 7.9m,

Condition- halfway

blocked, culvert

broken on the LHS

Headwall- brick

work

0+062

Lumino

Bypass

Repair headwall Cross culvert:

(1No.)900mmФ

(1No.)600mmФ

(1No.)450mmФ

concrete pipe

culvert, Length

8.7m, Condition-

okay but headwall

damaged at outlet

Headwall- stone

pitching


maintenance

Skew culvert:

600mmФ concrete

pipe culvert,

Length 7.9m,

Condition- halfway

blocked

Headwall- stone

pitching

55

APPENDIX 1-3.1 (b)

FINDINGS FROM THE FIELD ASSESSMENT OF DRAINAGE STRUCTURES FOR BUSIA -MAJANJI ROAD

LINK

CONDITION ASSESSMENT OF THE EXISTING CULVERTS ON BUSIA-MAJANJI ROAD LINK

Chainage Physical Condition and proposal for

improvement Description Photographs

1+110 No wingwalls and damaged headwall. Replace end structures

Cross culvert: 900mmФ metallic culvert Length 8.0m Condition-headwall damaged, outlet covered with vegetation growth Headwall- stone pitching

1+550 Desilt and carry our

river training Cross culvert: box culvert 1.0x1.56m, Length 17m Condition-halfway blocked Headwall-concrete


regular maintenance Cross culvert: 450mmФ cross pipe culvert Length 10.8m Condition-fully blocked Headwall- concrete

56




5+764 Remove vegetation and keep desilted and maintained

Cross culvert: 600mmФ cross pipe culvert Length 9.2m Condition- open but outlet covered with vegetation Headwall- stone pitching

5+816 Regular maintenance Cross culvert: 600mmФ cross pipe culvert Length 7.8m Condition- headwall damaged, 30% silted Headwall- stone pitching

6+980 Regular maintenance Cross culvert: 900mmФ cross pipe culvert Length 8.7m Condition- halfway blocked Headwall- stone pitching

57




8+351 Construct end structures and desilt

Cross culvert: 600mmФ cross pipe culvert Length 9.5m Condition- halfway blocked Headwall- stone pitching at inlet, no headwall at outlet

8+590 Repair broken end structures and desilt

Cross culvert: 600mmФ cross pipe culvert Length 10.0m Condition- halfway blocked, headwall damaged at outlet Headwall- stone pitching

10+280 Desilt and keep maintained

Cross culvert: probably (2No.)600mmФ cross pipe culvert Length 8.2m Condition- fully blocked Headwall- stone pitching

58




10+310 Sound form Cross culvert: 900mmФ cross pipe culvert Length 7.8m Condition- okay Headwall- stone pitching

10+880 Desilt and keep

regular maintenance Cross culvert: 600mmФ cross pipe culvert Length 7.8m Condition- half way blocked Headwall- stone pitching

11+315 Desilt, clear the inlet and outlet and keep regular maintenance

Cross culvert: 600mmФ cross pipe culvert Length 8.6m Condition- fully blocked Headwall- brick work

59





Cross culvert: probably (2No.)600mmФ cross pipe culvert Length 8.8m Condition- fully blocked, outlet has gabion Headwall- brick work


Cross culvert: 900mmФ cross pipe culvert Length 9.7m Condition- half way blocked Headwall- stone pitching

15+481 Replace end structures and keep regular maintenance

Cross culvert: 600mmФ metallic culvert Length 8.7m Condition- open but some vegetation growth at outlet Headwall- stone pitching

60




16+275 Repair the aprons and reinforce with rip rap or gabion mattresses at the outfalls

Cross culvert: 600mmФ cross pipe culvert Length 9.8m Condition- okay Headwall- concrete

16+320 Sound form Cross culvert: 600mmФ cross pipe culvert Length 9.8m Condition- okay Headwall- stone pitching


Cross culvert: probably (2No.)600mmФ cross pipe culvert Length 7.6m Condition- fully blocked Headwall- brick work

61




17+930 Sound form but improve by erecting rip rap for outfall strengthening

Skew culvert: 600mmФ metallic culvert Length 9.5m Condition- okay Headwall- stone pitching


cross culvert: probably 450mmФ concrete pipe culvert Length 10.5m Condition- fully blocked Headwall- concrete

20+119 Sound form cross culvert: 600mmФ concrete pipe culvert Length 7.9m Condition- okay Headwall- concrete

62




21+565 Clear the vegetation and keep regular maintenance

Cross culvert: (2No.)600mmФ concrete pipe culvert Length 8.8m Condition- half way blocked Headwall- stone pitching


Cross culvert: 600mmФ concrete pipe culvert Length 9.8m Condition- half way blocked Headwall- stone pitching


Cross culvert: 600mmФ concrete pipe culvert Length 7.8m Condition- fully blocked Headwall- brick work

63





Cross culvert: 450mmФ concrete pipe culvert Length 7.8m Condition- fully blocked Headwall- block work


Cross culvert: 600mmФ concrete pipe culvert Length 7.2m Condition- fully blocked Headwall- block work


Cross culvert: 600mmФ metallic culvert Length 8.9m Condition- fully blocked Headwall- block work

64




25+374 Sound form but repair the end structures

Cross culvert: 600mmФ metallic culvert Length 8.8m Condition- okay Headwall- block work


Cross culvert: 600mmФ Concrete pipe culvert Length 8.5m Condition- fully blocked Headwall- block work

26+100 Desilt, clear the inlet and outlet and keep regular maintenance; repair the end structures

Cross culvert: 600mmФ metallic culvert Length 9.2m Condition- fully blocked Headwall- block work

65




26+840 Sound form Cross culvert: 600mmФ Concrete pipe culvert Length 10.8m Condition- okay Headwall- stone pitching

66

Appendix 1-4.0

Book of drawings

DRAWING NUMBER TITLE

UNRA/ML-BM/DS:001REV BOX CULVERT GENERAL ARRANGEMENT DRAWING

UNRA/ML-BM/DS:002REV SINGLE CELL BOX CULVERT DETAILS

UNRA/ML-BM/DS:003REV DOUBLE CELL VOX CULVERT DETAILS

UNRA/ML-BM/DS:004REV TRIPLE CELL BOX CULVERT DETAILS

UNRA/ML-BM/DS:005REV BOX CULVERT WINGWALL DETAILS

UNRA/ML-BM/DS:006REV BOX CULVERT APRON DETAILS (45 DEGREES)

UNRA/ML-BM/DS:007REV BOX CULVERT APRON DETAILS (30 DEGREES)

UNRA/ML-BM/DS:008REV PIPE CULVERT GENERAL ARRANGEMENT DRAWING

UNRA/ML-BM/DS:009REV PIPE CULVERT END STRUCTURES

UNRA/ML-BM/DS:010REV DROP INLET DETAILS

UNRA/ML-BM/DS:011REV BUSIA-MAJANJI END STRUCTURES SCHEDULE

UNRA/ML-BM/DS:012REV MUSITA-LUMINO END STRUCTURES SCHEDULE

UNRA/ML-BM/DS:013REV BUSIA-MAJANJI SCOUR PROTECTION DETAIL AND SCHEDULE

UNRA/ML-BM/DS:014REV MUSITA-LUMINO SCOUR PROTECTION DETAIL AND SCHEDULE

UNRA/ML-BM/DS:015REV

MUSITA-LUMINO STANDARD SIDE DITCH DETAILS AND SCHEDULES.





UNRA/ML-BM/DS:020REV BUSIA-MANJI STANDARD SIDE DITCH DETAILS AND SCHEDULES.


Rev. No. DATE Desrcription Of Revision

UGANDA NATIONAL ROADS AUTHORITY

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DIMENSIONS OF STRUCTURE SINGLE PIPE (m)

0.60

A B

0.90 1.40 2.60

EC D

1.201.90

GF

3.20 0.70

ELEVATIONA 142 BRC Mesh

DIMENSIONS OF STRUCTURE FOR MULTIPLE PIPES (m)

0.90TWIN

TRIPLE 0.90

STRUCTURE

4.30

2.80

C

1.601.60

1.601.60

A B

6.103.65

5.15 7.60

D E

1.306.95

1.308.45

F GØ

Ø

Ø

1.20TWIN

TRIPLE 1.20 5.20

3.402.051.60

2.051.60

6.704.25

6.05 8.50

1.307.55

1.309.35

1.20 1.60 2.05 4.902.451.80 5.70 1.30

0.90 1.30 1.60 4.002.151.50 4.80 1.00




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CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


³³




P O BOX 28487

KAMPALA - UGANDA

Tel: +256 312 233 100,

Fax: +256 414 232 807


CONSULTANT

with

Kampala, Uganda

P.O.Box 41292,


Plot M655

NEWPLAN Ltd.

Kampala, Uganda

3 Portal Avenue,

P.O. Box 7544,

Crusader House,

SMEC Limited

in association

DESIGN REVIEW


CEC / MBWJULY 20151


Documents

Drainage Structures Design Review