1. ImprovedcontrolatDBOdrain/limebeds

2. 2
Total length of DBO drain is 4.89 kilometers
Key
DBO drain network
Critical zones
Temp 82°C
Depth 4 feet
Temp 80°C
Depth 5 feet
Temp 70°C
Depth 4 feet
Temp 67°C
Depth 3 feet
Standard depth of drain is 2.5 feet except at the highlighted points
Total length of critical zones is 1 kilometers
Critical zone:
Where depth is 3 feet or more

3. 3
Issueathand
• Exposure of risk of accident due to open drains
Existingcontrol
• Manned check post for ensuring the structural integrity of DBO bridge

4. 4
Key
DBO drain network
One security post
Existing control

5. 5
Proposedcontrolsforimprovement
1- DBO drain fencing
Features:
• High cost
• Minimum risk of accident
• Maintenance prone
2- Manned security
Features:
• Low cost
• Moderate risk of accident

6. Options Costing Cons
6
1- Cost effective
2- Theft potential
1- Likely to corrode
2- Theft potential
3-High cost
1- Likely to corrode
2- High cost
1- Restricted life
Drain covers
Barbed wire fencing
Pale fencing
Hand railing
Barbed wire fencing
PKR 4,492,500
PKR 17,837,105
PKR 21,564,000
PKR 6,289,500
Proposal-1

7. 7
Key
DBO drain network
One security post
Existing check post
Proposed check posts
Two security posts
Proposal-2