Indiana Department of Transportation SEP 14 Report Alternate Pavement Type
Appendix A PR 69 (IR-30983)
The six (6) Contractors participated in both pavement type pay options (see below Bid Analysis Summary). Out of these six (6), one (1) Contractors bid was irregular due to their bid amount exceeded their cumulative bonding limit.
INDOT provided the following pavement design thickness for this project:
- PR 69 mainline
- 12.5 inches of PCCP or
- 16 inches of HMA.
- SR 68 ramps
- 9 inches of PCCP or
- 12.5 inches of HMA.
Bid Analysis Summary
| Bidders | Initial Bid | PW Cost for PCCP | Bid Analysis | ||
|---|---|---|---|---|---|
| A | $10,474,000.00 | + | $682,586.00 | = | $11,156,586.10 |
| B | $10,511,052.70 | + | $682,586.00 | = | $11,193,638.70 |
| C | $10,607,395.85 | + | $682,586.00 | = | $11,289,981.85 |
| D | $10,856,438.00 | + | $682,586.00 | = | $11,539,024.00 |
| E | $11,155,757.20 | + | $682,586.00 | = | $11,838,343.20 |
| Bidders | Initial Bid | PW Cost for HMA | Bid Analysis | ||
|---|---|---|---|---|---|
| C | $10,566,162.90 | + | $1,072,255.00 | = | $11,638,417.90 |
| D | $10,681,286.79 | + | $1,072,255.00 | = | $11,753,541.79 |
| A | $10,715,000.00 | + | $1,072,255.00 | = | $11,787,255.00 |
| B | $10,765,422.40 | + | $1,072,255.00 | = | $11,837,677.40 |
| E | $11,239,845.14 | + | $1,072,255.00 | = | $12,312,100.14 |
The low bid amount, out of all 5 bids, was for PCCP pay items option (Bidder A) and after adding PW cost of HMA and PCCP to the respective pavement type options, PCCP option was also the low bid (Bidder A). PCCP pay items option was awarded for this contract.
INDOT compared the estimated cost with actual low bid costs of both pavement types. The following table shows the cost comparison with low bid of those pavement items that were relative to the mainline pavements and relative to this alternate bid for pavement type. All other items in the bids were common to both types of pavement. Shoulders and "S" Lines are to be HMA.
| Bid Item | Bid Quantities | Estimated Cost of Item Per Unit | Low Bid Cost of Item Per Unit | Range of Bid Costs of Item Per Unit | Average Bid Cost of Item Per Unit | HMA or PCCP Option |
|---|---|---|---|---|---|---|
| QC/QA PCCP, 12.5 IN. | 46,296 yd2 | $39.18 | $29.00 | $29.00 - $30.25 | $29.78 | PCCP |
| QC/QA PCCP, 9 IN. | 11,474 yd2 | $33.45 | $23.00 | $23.00 - $24.25 | $23.78 | PCCP |
| Subbase for PCCP | 17,580 yd3 | $34.29 | $35.00 | $33.11 - $47.80 | $38.73 | PCCP |
| D-1 Contraction Joint | 34,050 ft | $9.59 | $8.25 | $8.25 - $9.01 | $8.59 | PCCP |
| QC/QA-HMA, 5, 76, Surface | 4,570 TON | $75.70 | $85.00 | $84.00 - $86.50* | $84.70 | HMA |
| QC/QA-HMA, 1, 64, Surface | 946 TON | $57.68 | $61.00 | $60.00 - $64.00 | $61.36 | HMA |
| QC/QA-HMA, 5, 76, Intermediate | 7,618 TON | $57.30 | $60.00 | $56.00 - $60.15 | $58.91 | HMA |
| QC/QA-HMA, 1, 64, Intermediate | 1,577 TON | $51.10 | $50.50 | $50.00 - $54.50 | $51.81 | HMA |
| QC/QA-HMA, 5, 64, Base | 24,385 TON | $47.90 | $49.00 | $47.00 - $52.00 | $49.63 | HMA |
| QC/QA-HMA, 1, 64, Base | 3,786 TON | $60.49 | $53.00 | $52.00 -$54.80* | $53.49 | HMA |
| QC/QA-HMA, 5, 76, Intermediate, OG | 12,518 TON | $53.40 | $50.00 | $46.00 - $50.70* | $48.94 | HMA |
* Bidder E was higher on almost all HMA items.
The above table shows that pavement item bids on PCCP are lower than the estimates used in evaluation but on HMA the majority of the items are higher than the estimates. This indicates that a true cost savings was realized by INDOT in this process.
The table below compares some common HMA items found in both PCCP and HMA options to check for unbalanced bids. These bids appear to be consistent and no anomalies were found.
| Bid Item | Bid Quantities | Low Bid Cost of Item Per Unit | Range of Bid Costs of Item Per Unit | Average Bid Cost of Item Per Unit | HMA or PCCP Bid |
|---|---|---|---|---|---|
| HMA Surface, Type A | 518 TON | $64.00 | $62.25 - $67.49 | $64.47 | PCCP |
| HMA Surface, Type A | 628 TON | $68.00 | $62.00 - $68.00 | $64.88 | HMA |
| HMA Intermediate, Type A | 1,554 TON | $54.00 | $54.00 - $57.90 | $55.83 | PCCP |
| HMA Intermediate, Type A | 1,884 TON | $52.00 | $52.00 - $55.80 | $53.58 | HMA |
Conclusion
INDOT saved the tax payers approximately $75,662.90 immediately, at the bid opening, (HMA Low Bid - PCCP Low Bid). Using the Bid Analysis amounts (after PW costs applied); INDOT saved the tax payers approximately $465,331.80 over the 50 year service life of the pavement. These savings include the reduction of INDOT's consultant cost of $16,500.00 for producing two sets of typical plan sheets and quantities. The in-house costs for INDOT were determined negligible.
The PW cost for future maintenance did not impact the bid and which contractor received the contract. INDOT believes using this process of alternate bids for pavement type selection on this project was very successful.
PW of Future Maintenance of the Pavement I-69 (IR-30983)
PW of HMA Option = $1,072,255.00
PW of PCCP Option = $682,586.00
| Age in Years | Rehab. | Cost $ | Present Worth Cost $ |
|---|---|---|---|
| 3 | Joint Seal | 57,377.00 | 51,008.00 |
| 6 | Joint Seal | 57,377.00 | 45,346.00 |
| 9 | Joint Seal | 57,377.00 | 40,312.00 |
| 12 | Joint Seal | 57,377.00 | 35,837.00 |
| 15 | Joint Seal | 57,377.00 | 31,859.00 |
| 18 | Joint Seal | 57,377.00 | 28,323.00 |
| 20 | Mill and Functional Overlay | 1,244,790.00 | 568,106.00 |
| 23 | Joint Seal | 57,377.00 | 23,279.00 |
| 26 | Joint Seal | 57,377.00 | 20,695.00 |
| 29 | Joint Seal | 57,377.00 | 18,398.00 |
| 32 | Joint Seal | 57,377.00 | 16,356.00 |
| 35 | Mill and Resurface | 588,051.00 | 149,021.00 |
| 38 | Joint Seal | 57,377.00 | 12,926.00 |
| 41 | Joint Seal | 57,377.00 | 11,491.00 |
| 44 | Joint Seal | 57,377.00 | 10,216.00 |
| 47 | Joint Seal | 57,377.00 | 9,082.00 |
| Total HMA PW Cost$1,072,255.00 | |||
| Age in Years | Rehab. | Cost $ | Present Worth Cost $ |
|---|---|---|---|
| 8 | Reseal the Joint | 71,502.00 | 52,246.00 |
| 16 | Reseal the Joint | 71,502.00 | 38,175.00 |
| 24 | Reseal the Joint | 71,502.00 | 27,894.00 |
| 30 | Mill and Functional Overlay | 1,256,840.00 | 387,507.00 |
| 33 | Joint Seal | 57,377.00 | 15,727.00 |
| 36 | Joint Seal | 57,377.00 | 13,981.00 |
| 39 | Joint Seal | 57,377.00 | 12,429.00 |
| 42 | Mill and Resurface | 602,736.00 | 116,072.00 |
| 45 | Joint Seal | 57,377.00 | 9,823.00 |
| 48 | Joint Seal | 57,377.00 | 8,732.00 |
| Total PCCP PW Cost $682,586.00 | |||
PW = F [1/(1+i)n]
Where: F = Future Construction Cost
i = Discount rate (4%)
n = Number of years from year zero
| Total Cost | Alternative 1: 12.5 inches PCCP | Alternative 2: 16 inches HMA | ||
|---|---|---|---|---|
| Agency Cost ($1000) | User Cost ($1000) | Agency Cost ($1000) | User Cost ($1000) | |
| Undiscounted Sum | $2,360.97 | $0.00 | $2,636.12 | $0.00 |
| Present Value | $682.59 | $0.00 | $1,072.26 | $0.00 |
| EUAC | $31.77 | $0.00 | $49.91 | $0.00 |
| Lowest Present Value Agency Cost | Alternative 1: 12.5 inches PCCP | |||
| Lowest Present Value User Cost | Alternative 1: 12.5 inches PCCP | |||
| Year | Alternative 1: 12.5 inches PCCP | Alternative 2: 16 inches HMA | ||
|---|---|---|---|---|
| Agency Cost ($1000) | User Cost ($1000) | Agency Cost ($1000) | User Cost ($1000) | |
| 0 | ||||
| 1 | ||||
| 2 | ||||
| 3 | $57.38 | |||
| 4 | ||||
| 5 | ||||
| 6 | $57.38 | |||
| 7 | ||||
| 8 | $71.50 | |||
| 9 | $57.38 | |||
| 10 | ||||
| 11 | ||||
| 12 | $57.38 | |||
| 13 | ||||
| 14 | ||||
| 15 | $57.38 | |||
| 16 | $71.50 | |||
| 17 | ||||
| 18 | $57.38 | |||
| 19 | ||||
| 20 | $1,244.79 | |||
| 21 | ||||
| 22 | ||||
| 23 | $57.38 | |||
| 24 | $71.50 | |||
| 25 | ||||
| 26 | $57.38 | |||
| 27 | ||||
| 28 | ||||
| 29 | $57.38 | |||
| 30 | $1,256.84 | |||
| 31 | ||||
| 32 | $57.38 | |||
| 33 | $57.38 | |||
| 34 | ||||
| 35 | $588.05 | |||
| 36 | $57.38 | |||
| 37 | ||||
| 38 | $57.38 | |||
| 39 | $57.38 | |||
| 40 | ||||
| 41 | $57.38 | |||
| 42 | $602.74 | |||
| 43 | ||||
| 44 | $57.38 | |||
| 45 | $57.38 | |||
| 46 | ||||
| 47 | $57.38 | |||
| 48 | $57.38 | |||
| 49 | ||||
| 50 | ||||