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Study for LAPSSET Corridor FS & Lamu Port MP & DD JPC & BAC/GKA JV ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐

Final FS & MP Report (Vol. V) A2 - 1 May, 2011

A2 LAPSSET Corridor Routes Selection

A2.1 Aerial Photo Maps

A2.1.1 Index Map

Study for LAPSSET Corridor FS & Lamu Port MP & DD JPC & BAC/GKA JV ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐


A2.1.2 Sample Outputs

(1) Orthophoto Maps



Figure A2.1-1 Lodwar, Isiolo and Archers Post

(2) Topographical Maps



Figure A2.1-2 Isiolo, Lamu Port and Rift Valley



(3) DEM



Figure A2.1-3 Isiolo, Lokichokio and Marsabit



A2.2 Detailed Evaluation of Corridor Alternatives for each Segment

Evaluation: Segment 1 Lamu - Garissa CORRIDOR PARAMETER Alternative I-1 Alternative I-2 Alternative I-3

TOTAL length 250 km 330km 260km

Geometric Parameters 1:Vertical alignment (Flat, Hilly) Flat terrain Flat terrain Flat terrain

2:Horizontal alignment Almost Straight Some moderate curve involved Some moderate curve involved

2:Swampy portion 60 km 40km 60km

3: Rocky portion 0 % 0 % 0 %

Ease in construction Availability of corridor width Easy Easy Easy

Number of large river crossings 0 2 0

Accessibility Good Good Good

Number of required large tunnel 0 0 0

Environmental Concerns

National Parks/Reserves None traversed None traversed None traversed

Endangered ecosystems None traversed None traversed None traversed

Socio-economical aspects

Not in particular Not in particular Not in particular

Evaluation for Railway 1(Most appropriate) 3 2

1 Construction cost 1(least expensive) 3(most expensive) 2

2 Special issue Not in particular Not in particular Not in particular

Evaluation for Highway 1(Most appropriate) 3 2


2 Special issue

- Will open up the eastern side of river Tana.

- Potential Security concerns

- Will open up the eastern side of river Tana.

- Potential Security concerns

Evaluation for Pipeline 1(Most appropriate) 3 2


2 Special issue None River Tana crossed twice; special crossing techniques such as HDD may be required

Traverses Arawale National Reserve. Consent from KWS and NEMA will be required



Evaluation: Segment 2 Garissa - Isiolo

CORRIDOR PARAMETER Alternative II-1 Alternative II-2

TOTAL length 280km 290km

Geometric Parameters 1:Vertical alignment (Flat, Hilly) Flat Terrain Flat Terrain

2:Horizontal alignment Almost straight Almost straight with some curvature

2:Swampy portion 20 km 20 km

3: Rocky portion < 5% <5 %

Ease in construction

Availability of corridor width Good Good

Number of large river crossings 0 0

Accessibility Good Good Number of required tunnel, bridges Nil Nil


National Parks/Reserves None traversed None traversed

Endangered ecosystems None traversed None traversed


Not in particular Not in particular

Evaluation for Railway 1(Most appropriate) 2

1 Construction cost Almost same with II-2 Almost same with II-1

2 Special issue Not in particular Not in particular

Evaluation for Highway Even- Even

1 Construction cost Even Even

2 Special issue Even Even

Evaluation for Pipeline Even Even


2 Special issue None. Crossings may be achieved by normal open-cut trenching

None. Crossings may be achieved by normal open-cut trenching



Evaluation: Segment 3 Isiolo - Lodwar CORRIDOR PARAMETER Alternative III-1 Alternative III-2 Alternative III-3 Alternative III-4

TOTAL length 470 km 420km 440 km 470km

Geometric Parameters

1:Vertical alignment (Flat, Hilly)

Mountainous Average gradient is most gentle

Mountainous Very Steep valley

Mountainous Very Steep valley

Mountainous Steep valley

2:Horizontal alignment Curvature moderate

Less Curvature than III-1 Curvature moderate Less Curvature than

III-1 2:Swampy portion 0km 0km 0km 0km

3: Rocky portion 30% 30% 30% 30%

Ease in construction Availability of corridor width

Generally Possible Generally Possible Generally Possible Generally Possible

Number of large river crossings 4 3 3 3

Accessibility Good Fair to bad Fair to bad Fair Number of required long tunnel/Open cut 1 2 1

(longer than III-1 ) 2


National Parks/Reserves None traversed None traversed None traversed None traversed

Endangered ecosystems None traversed None traversed None traversed None traversed


Good for Road development for populated area

Not in particular Not in particular Not in particular

Evaluation for Railway 1 4 4 4

1 Construction cost 1 4 2 4

2 Special issue Accessibility is problem

Accessibility is problem


Evaluation for Highway 1 2 2 4

1 Construction cost 1 2 2 4

2 Special issue

- By-passes the most rugged part of suguta valley

- Crossing in the middle of suguta valley

- Crossing in the middle of suguta valley


Evaluation for Pipeline 1 4 4 4

1 Construction cost 1 (Least expensive) 4 4 4

2 Special issue

A sizeable number of dry river crossings and two major ones.

Crossing of Suguta Valley will require carefully planned construction procedures and possible slope stabilization

Crossing of Suguta Valley will require carefully planned construction procedures and possible slope stabilization

Traverses Losai National Reserve alongside existing Isiolo-Moyale highway.



Evaluation: Segment 4 Lodwar - Lokichokio

CORRIDOR PARAMETER Alternative IV-1

TOTAL length 240 km

Geometric Parameters

1:Vertical alignment (Flat, Hilly) Flat terrain

2:Horizontal alignment Curvature moderate

2:Swampy portion 0 km

3: Rocky portion < 15%


Availability of corridor width 100%

Number of large river crossings 5

Accessibility Good Number of required Long tunnel 0


National Parks/Reserves None traversed

Endangered ecosystems None traversed

Socioeconomical aspects

Not in particular

Evaluation for Railway

1 Construction cost N/A

2 Special issue N/A

Evaluation for Highway


2 Special issue N/A

Evaluation for Pipeline


2 Special issue N/A



Evaluation: Segment 5 Isiolo - Moyale

CORRIDOR PARAMETER Alternative V-1 Alternative V-2 Alternative V-3

TOTAL length 470km 440 km 380 km

Geometric Parameters 1:Vertical alignment (Flat, Hilly)

Flat terrain except for Marsabit and Moyale Flat terrain Flat terrain

2:Horizontal alignment Moderate Moderate Straight

2:Swampy portion 0% 0% 30%

3: Rocky portion < 10% < 10% < 10%


Availability of corridor width Good Good Good

Number of large river crossings 4 4 3

Accessibility Good Good Good

Number of required long tunnel 0 0 0


National Parks/Reserves None traversed None traversed None traversed

Endangered ecosystems None traversed None traversed None traversed


Not in particular Not in particular Traverses areas with little or no human activity

Evaluation for Railway １ 1 3

1 Construction cost １ 1(Least expensive) 3

2 Special issue Security in construction may be problematic

Evaluation for Highway 1 1 3

1 Construction cost 1 1 3

2 Special issue - Traverses areas with

little or no human activity

Evaluation for Pipeline 1 1 3

1 Construction cost 1 1 3(Most expensive)

2 Special issue

Crosses Losai National Reserve and Marsabit National Park both of which are already traversed by Isiolo-Moyale Highway

Crosses Losai National Reserve and Marsabit National Park both of which are already traversed by Isiolo-Moyale Highway

Completely new “straight line” route traversing predominantly virgin land with little access to existing road network. Possible construction challenge in moving equipment, materials and workforce.



Evaluation: Segment 6 Nairobi - Isiolo

CORRIDOR PARAMETER Alternative VI-1 Alternative VI-2

TOTAL length 250 km 240 km

Geometric Parameters 1:Vertical alignment (Flat, Hilly) Mountainous Rolling to Mountainous

2:Horizontal alignment Curvature moderate to high Curvature moderate

2:Swampy portion 0 km 0 km

3: Rocky portion 0% 0%


Availability of corridor width 100% 100%

Number of large river crossings 5 4

Accessibility Good Good

Number of required tunnel High Moderate


National Parks/Reserves None traversed None traversed

Endangered ecosystems None traversed None traversed


As no railway exist, meaningful to construct.

Railway already exist, less meaning to construct

Evaluation for Railway 1 2

1 Construction cost 1(least expensive) 2

2 Special issue Not in particular Not in particular

Evaluation for Highway Even Even



Evaluation for Pipeline Even Even





A2.3 Locations of Major Drainage Structures

Figure A2.3-1 Location of Major Drainage Structures

Source: Google Earth



Table A2.3-1 Inventory of Drainage Structures

SEGMENT CHAINAGE TYPE LENGTH (M) REMARKLAMU ‐ ISIOLO 39.5 BRIDGE 80 RIVER

69.0 BRIDGE 130 RIVER496.7 BOX 7 RIVER510.4 BOX 7 RIVER524.5 BOX 5 RIVER

ISIOLO ‐ NAKODOK 7.0 BOX 11 RIVER8.5 BOX 11 RIVER

14.0 BRIDGE 30 RIVER21.0 BOX 10 RIVER21.5 BOX 12 RIVER21.8 BOX 10 RIVER23.3 BOX 20 RIVER23.5 BOX 12 RIVER24.4 BOX 25 RIVER25.3 BRIDGE 30 RIVER37.0 BRIDGE 40 RIVER38.7 BOX 12 RIVER43.0 BOX 8 RIVER44.3 BOX 13 RIVER44.7 BOX 13 RIVER48.8 BOX 4 RIVER53.3 BRIDGE 38 RIVER63.3 BOX 20 RIVER64.3 BOX 15 RIVER70.6 BOX 5 RIVER72.1 BOX 13 RIVER73.7 BRIDGE 9 RIVER81.2 BRIDGE 30 RIVER85.5 BOX 6 RIVER86.1 BOX 6 STREAM86.4 BOX 6 STREAM87.0 BOX 15 RIVER89.1 BOX 7 RIVER90.5 BOX 3 RIVER95.1 BRIDGE 17 RIVER95.7 BOX 4 RIVER96.9 BOX 4 RIVER98.3 BOX 10 RIVER

101.0 BRIDGE 10 RIVER103.0 BOX 5 VALLEY130.8 BOX 7 RIVER

[STRAIGHT] 169.2 BOX 14 RIVER[STRAIGHT] 173.0 BRIDGE 50 RIVER

243.0 BRIDGE 70 RIVER245.5 BRIDGE 47 RIVER255.2 BOX 10 RIVER259.5 BOX 10 RIVER260.4 BOX 10 RIVER266.0 BRIDGE 30 RIVER269.4 BOX 29 RIVER279.1 BOX 6 RIVER280.5 BOX 9 RIVER288.4 BOX 18 RIVER290.0 BRIDGE 20 RIVER292.0 BOX 8 RIVER296.9 BOX 3 RIVER298.3 BOX 10 RIVER302.6 BOX 8 RIVER311.0 BRIDGE 36 RIVER320.0 BRIDGE 20 RIVER328.0 BRIDGE 26 RIVER332.0 BOX 14 RIVER335.4 BOX 17 RIVER337.8 BRIDGE 27 RIVER352.4 BOX 13 RIVER353.0 BRIDGE 30 RIVER356.7 BRIDGE 27 RIVER360.3 BOX 7 RIVER362.0 BRIDGE 136 RIVER363.8 BOX 15 RIVER

363.8 BOX 15 RIVER370.0 BOX 15 RIVER370.2 BOX 15 RIVER371.2 BOX 25 RIVER371.7 BOX 20 RIVER374.0 BOX 20 RIVER376.0 BOX 17 RIVER377.0 BRIDGE 28 RIVER381.7 BOX 10 RIVER385.0 BOX 17 RIVER386.3 BOX 11 RIVER387.0 BOX 4 RIVER387.2 BOX 7 RIVER389.1 BRIDGE 57 RIVER391.0 BRIDGE 36 RIVER391.3 BRIDGE 26 RIVER391.5 BOX 23 RIVER392.4 BOX 11 RIVER392.6 BOX 11 RIVER393.3 BOX 12 RIVER394.0 BOX 10 RIVER394.6 BOX 6 RIVER396.6 BOX 19 RIVER397.4 BOX 19 RIVER398.0 BOX 18 RIVER398.1 BOX 10 RIVER398.8 BOX 10 RIVER400.7 BOX 27 RIVER402.6 BOX 20 RIVER403.8 BOX 17 RIVER404.2 BOX 7 RIVER406.0 BOX 14 RIVER406.5 BOX 14 RIVER408.3 BOX 17 RIVER410.5 BOX 12 RIVER412.0 BOX 7 RIVER413.0 BOX 14 RIVER413.2 BOX 11 RIVER414.0 BRIDGE 48 RIVER414.4 BOX 7 RIVER415.0 BRIDGE 35 RIVER416.0 BOX 20 RIVER416.6 BOX 14 RIVER417.3 BOX 7 RIVER417.9 BOX 3 RIVER419.0 BOX 12 RIVER421.0 BRIDGE 107 RIVER421.0 BRIDGE 57 RIVER421.8 BOX 8 RIVER422.5 BOX 8 RIVER423.5 BOX 5 RIVER424.5 BOX 7 RIVER426.6 BRIDGE 22 RIVER427.6 BRIDGE 10 RIVER429.3 BRIDGE 18 RIVER430.0 BOX 8 RIVER431.3 BOX 21 RIVER432.4 BOX 17 RIVER432.7 BOX 20 RIVER433.2 BRIDGE 27 RIVER433.7 BOX 7 RIVER435.0 BOX 6 RIVER435.5 BOX 20 RIVER437.0 BRIDGE 55 RIVER438.5 BOX 15 RIVER439.0 BOX 25 RIVER440.0 BOX 24 RIVER440.4 BOX 16 RIVER440.7 BOX 20 RIVER442.6 BRIDGE 33 RIVER444.0 BOX 15 RIVER445.4 BOX 8 RIVER



Source: JPC

444.0 BOX 15 RIVER445.4 BOX 8 RIVER446.0 BOX 13 RIVER446.3 BOX 4 RIVER447.0 BOX 9 RIVER447.2 BOX 20 RIVER448.0 BOX 7 RIVER448.3 BOX 7 RIVER450.3 BRIDGE 24 RIVER452.2 BOX 24 RIVER452.6 BOX 8 RIVER453.2 BRIDGE 14 RIVER454.3 BOX 3 RIVER454.7 BOX 9 RIVER455.4 BOX 4 RIVER456.0 BOX 9 RIVER456.5 BOX 9 RIVER457.2 BOX 12 RIVER457.9 BOX 17 RIVER459.4 BOX 4 RIVER459.7 BOX 6 RIVER460.7 BOX 10 RIVER462.0 BOX 8 RIVER463.5 BOX 8 RIVER464.8 BOX 14 RIVER465.3 BRIDGE 19 RIVER465.8 BOX 9 RIVER466.1 BOX 7 RIVER467.3 BRIDGE 41 RIVER469.0 BOX 19 RIVER470.6 BOX 13 RIVER479.0 BOX 19 RIVER480.0 BOX 8 RIVER481.2 BOX 12 RIVER482.6 BOX 4 RIVER485.0 BOX 16 RIVER487.0 BRIDGE 37 RIVER487.4 BRIDGE 40 RIVER

487.4 BRIDGE 40 RIVER490.8 BOX 4 RIVER492.7 BRIDGE 33 RIVER503.0 BRIDGE 56 RIVER505.0 BRIDGE 60 RIVER512.3 BOX 10 RIVER512.7 BOX 12 RIVER513.7 BOX 16 RIVER534.0 BRIDGE 18 RIVER535.0 BOX 8 RIVER536.4 BOX 11 RIVER537.0 BRIDGE 60 RIVER541.3 BOX 19 RIVER542.3 BOX 8 RIVER546.4 BRIDGE 56 RIVER547.0 BRIDGE 89 RIVER548.1 BOX 10 RIVER549.2 BOX 10 RIVER550.4 BRIDGE 33 RIVER552.8 BOX 14 RIVER555.2 BOX 25 RIVER556.3 BOX 15 RIVER561.6 BOX 10 RIVER565.0 BRIDGE 37 RIVER583.0 BOX 20 RIVER598.7 BOX 19 RIVER604.0 BOX 20 RIVER611.6 BOX 7 RIVER612.1 BOX 7 RIVER619.0 BRIDGE 110 RIVER620.7 BOX 12 RIVER624.7 BRIDGE 30 RIVER647.5 BRIDGE 43 RIVER648.0 BOX 10 RIVER653.0 BRIDGE 30 RIVER657.5 BOX 25 RIVER660.5 BOX 23 RIVER667.0 BOX 14 RIVER689.4 BOX 25 RIVER705.5 BRIDGE 34 RIVER708.0 BOX 10 RIVER721.5 BOX 10 RIVER



A2.4 Preliminary Design Plan & Profile Sample Outputs

A2.4.1 Railway Alignment



A2.4.2 Highway Geometric Design

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