Flood delay, liquidated damages and whether to crash the bridge programme
A PWD contract for a road bridge over a seasonal river has a contract value of ₹8.60 crore and a completion period of 540 days, with liquidated damages of 0.5% of the contract value per week or part thereof, subject to a maximum of 10%. During month 11, the pier P2 foundation was delayed by 32 days because of an unprecedented flood; the river gauge record shows a peak exceeding the 50-year return value, and the piers are on the critical path. The remaining critical activities, with their normal and crash durations and cost slopes, are: pier shaft and cap, 30 days normal, 20 days crash, ₹42,000 per day; precast girder casting and launching, 45 days normal, 38 days crash, ₹65,000 per day; deck slab and wearing course, 25 days normal, 21 days crash, ₹35,000 per day. The approach road has 20 days normal and 16 days crash at ₹28,000 per day, with 15 days of float. The contractor has asked for instructions on how to make up the lost time.
1. Compute the liquidated damages exposure and determine, on cost grounds alone, which activities (if any) should be crashed.
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LD rate 0.5% of ₹8.60 crore = ₹4.30 lakh per week = ₹61,400 per day. The 10% cap is ₹86 lakh, so it is not reached here.
Exposure for 32 days Under a 'per week or part thereof' clause, 32 days = 4 weeks + 4 days = 5 chargeable weeks → 5 × ₹4.30 lakh = ₹21.5 lakh. (If the clause is read as pro-rata, 32/7 × 4.30 = ₹19.7 lakh - check the exact wording.)
Crash economics - compare each cost slope with the LD rate of ₹61,400/day
- Deck slab and wearing course: ₹35,000/day < ₹61,400 → crash the full 4 days. Cost ₹1.40 lakh, LD saved ₹2.46 lakh.
- Pier shaft and cap: ₹42,000/day < ₹61,400 → crash the full 10 days. Cost ₹4.20 lakh, LD saved ₹6.14 lakh.
- Girders: ₹65,000/day > ₹61,400 → financially not worth crashing (each day costs more than the LD it avoids), unless the client pays for acceleration or there is a larger social cost of late opening.
- Approach road: ₹28,000/day is the cheapest slope, but it has 15 days of float, so crashing it buys nothing on the completion date until that float is used up.
Conclusion on cost grounds: the maximum sensible recovery is 14 days for ₹5.60 lakh, saving 14 × ₹61,400 = ₹8.60 lakh, a net gain of about ₹3.0 lakh - but only if the contractor is actually liable for LD. The remaining 18 days cannot be recovered at a slope below the LD rate. Note also that the girder cycle is limited by concrete strength and prestressing, so a 7-day crash may not be physically achievable; check the method before assuming it.
2. Advise on the entitlement to extension of time for the flood and on the procedure to be followed.
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Entitlement
- An unprecedented flood with a peak above the 50-year return value is a classic force majeure / exceptional event under PWD and FIDIC-style conditions. The contractor is normally entitled to an extension of time without additional cost.
- The delay was on the critical path (pier P2 foundation), so it does affect completion. If there had been float, only the delay beyond the float would count.
- The extension shifts the completion date; the LD exposure of ₹21.5 lakh then disappears for those 32 days. Concurrency must be checked - if the contractor was already in delay on another front, the EOT may be reduced.
Procedure
- Notice within the period stipulated in the contract (commonly 28 days of the event or of becoming aware of it), failing which the claim can be time-barred.
- Evidence: river gauge data from the irrigation department, IMD rainfall data with the return period, site diary entries, dated photographs and videos, joint measurement of the flood level, and the contractor's updated programme showing the 32-day effect.
- The engineer should assess and issue a determination in writing, and record it as a contract event.
What EOT does not give
- It does not automatically pay for idle plant, site overheads or loss of productivity; that depends on a separate compensation-event clause. Price escalation is only as per the contract's price adjustment formula. Advise the contractor accordingly rather than allowing the EOT to be treated as an acceptance of all costs.
Practical advice: apply for the EOT as the primary route. Do not crash at the contractor's own cost for a delay that is excusable; that would be spending ₹5.6 lakh to avoid a liability that the EOT already removes.
3. The client insists on opening the bridge by the original date. How should the acceleration be instructed, priced and recorded?
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Instruction
- Acceleration must be a written instruction from the engineer, treated as a variation or a separate acceleration agreement; a verbal request in a progress meeting is worthless when the bill is presented.
- Record in the minutes that the client has elected to accelerate for public convenience, that EOT for the flood is otherwise admissible, and that the contractor is not waiving any rights by accelerating.
Pricing basis
- Start from the verified cost slopes: deck slab ₹35,000/day and pier shaft ₹42,000/day, plus the girder at ₹65,000/day if the 7-day reduction is genuinely achievable (check the concrete strength, prestressing and curing cycle first).
- Add site overheads, additional supervision, night-work lighting and permissions, extra formwork/falsework and a risk allowance; add contractor's overhead and profit as per the contract.
- Cap the lump sum and tie payment to milestones achieved, so the client pays for time actually recovered rather than for intention.
- Consider sharing the benefit: for example, pay 50–70% of the LD saved up to a stated ceiling; this keeps the contractor motivated to recover days without open-ended cost.
Records
- Maintain a separate cost code and daily resource returns (plant, labour, hours, concrete and steel quantities), with weather and productivity notes, so that the acceleration cost can be audited.
- Keep the pre-acceleration programme as a baseline and update it weekly.
- Confirm in writing whether LDs remain in force during the accelerated period, and how the EOT already due will interact with the new date. If the accelerated date is not achieved, the contractor should not be penalised for the force-majeure period.