Indiana Department of Transportation SEP 14 Report Alternate Pavement Type
Appendix G PR 69 (IR-33040)
Five (5) contractors participated in the bidding (5 PCCP options and 1 HMA option were bid) and all bids were substantially below the engineer's estimate. One (1) Contractor participated in both pavement type pay options. All contractors had the option to bid either HMA pay items section or PCCP pay items section or both. There was a third section in this bid was that comprised all the common items for the contract. The low bidder was determined from:
- Bid of HMA pay items section + PW cost of HMA, + Bid of common items section or
- Bid of PCCP pay items section + PW cost of PCCP, + Bid of common items section.
INDOT provided the following pavement design thickness for this project:
- PR 69 mainline
- 11 inches of PCCP or
- 13.5 inches of HMA
- SR 61 Ramps
- 9.5 inches of PCCP or
- 10 inches of HMA.
Bid Analysis Summary
Bidders | PCCP Section | PW Cost for PCCP | Common Section | Bid Analysis | |||
---|---|---|---|---|---|---|---|
A | $17,293,621.24 | + | $2,165,255.83 | + | $53,328,966.64 | = | $72,787,843.71 |
B | $16,950,357.18 | + | $2,165,255.83 | + | $55,723,131.57 | = | $74,838,744.58 |
C | $17,127,655.76 | + | $2,165,255.83 | + | $59,170,951.94 | = | $78,463,863.53 |
D | $16,962,560.17 | + | $2,165,255.83 | + | $61,630,589.86 | = | $80,758,405.86 |
E | $19,023,097.63 | + | $2,165,255.83 | + | $63,521,205.13 | = | $84,709,558.59 |
Bidder | HMA Section | PW Cost for HMA | Common Section | Bid Analysis | |||
---|---|---|---|---|---|---|---|
C | $17,097,621.52 | + | $3,434,001.06 | + | $59,170,951.94 | = | $79,702,574.52 |
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, 11 IN. | 162,570 yd2 | $29.88 | $26.75 | $24.50 - $32.00* | $27.11 | PCCP |
QC/QA PCCP, 9.5 IN. | 25,013 yd2 | $27.87 | $27.50 | $23.60 - $30.00* | $26.54 | PCCP |
Subbase for PCCP | 51,336 yd3 | $30.64 | $36.00 | $36.00 - $45.00* | $40.31 | PCCP |
D-1 Contraction Joint | 100,268 ft | $8.71 | $8.00 | $8.00 - $10.00* | $8.87 | PCCP |
QC/QA-HMA, 4, 76, Surface | 22,927 TON | $77.10 | $77.00 | $77.00 | $77.00 | HMA |
QC/QA-HMA, 2, 64, Surface | 2,072 TON | $49.99 | $63.00 | $63.00 | $63.00 | HMA |
QC/QA-HMA, 4, 76, Intermediate | 38,417 TON | $55.70 | $56.00 | $56.00 | $56.00 | HMA |
QC/QA-HMA, 2, 64, Intermediate | 3,475 TON | $49.65 | $52.00 | $52.00 | $52.00 | HMA |
QC/QA-HMA, 4, 64, Base | 108,045 TON | $47.80 | $51.45 | $51.45 | $51.45 | HMA |
QC/QA-HMA, 2, 64, Base | 4,873 TON | $49.57 | $50.00 | $50.00 | $50.00 | HMA |
QC/QA-HMA, 5, 76, Intermediate, OG | 38,107 TON | $53.80 | $52.00 | $52.00 | $52.00 | HMA |
* Bidder E was higher on all PCCP items.
The above table shows that pavement item bids on PCCP are lower than the estimates used in evaluation but on HMA a few 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 of the HMA items on the common section for the contract to check for unbalanced bids. All five bidders bid the same price for these items so 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 | 1278 TON | $74.00 | $74.00 - $74.00 | $74.00 | Both |
HMA Surface, Type B | 1,424 TON | $74.00 | $74.00 - $74.00 | $74.00 | Both |
HMA Intermediate, Type A | 2,010 TON | $68.00 | $68.00 - $68.00 | $68.00 | Both |
HMA Intermediate, Type B | 2,250 TON | $68.00 | $68.00 - $68.00 | $68.00 | Both |
Conclusion
INDOT saved the tax payers approximately $5,629,185.58 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 $6,897,930.81 over the 50 year service life of the pavement. These savings include the reduction of INDOT's consultant cost of $16,800.00 for producing two sets of typical plan sheets and quantities. The inhouse 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-33040)
PW of HMA Section = $3,434,001.06
PW of PCCP Section = $2,165,255.83
Age in Years | Rehab. | Cost $ | Present Worth Cost $ |
---|---|---|---|
3 | Joint Seal | 181,975.00 | $161,775.11 |
6 | Joint Seal | 181,975.00 | $143,817.49 |
9 | Joint Seal | 181,975.00 | $127,853.22 |
12 | Joint Seal | 181,975.00 | $113,661.05 |
15 | Joint Seal | 181,975.00 | $101,044.26 |
18 | Joint Seal | 181,975.00 | $89,827.98 |
20 | Mill and Functional Overlay | 4,002,878.00 | $1,826,861.27 |
23 | Joint Seal | 181,975.00 | $73,832.05 |
26 | Joint Seal | 181,975.00 | $65,636.42 |
29 | Joint Seal | 181,975.00 | $58,350.54 |
32 | Joint Seal | 181,975.00 | $51,873.42 |
35 | Mill and Resurface | 1,897,370.00 | $480,822.91 |
38 | Joint Seal | 181,975.00 | $40,996.32 |
41 | Joint Seal | 181,975.00 | $36,445.58 |
44 | Joint Seal | 181,975.00 | $32,399.98 |
47 | Joint Seal | 181,975.00 | $28,803.47 |
Total HMA PW Cost$3,434,001.06 |
Age in Years | Rehab. | Cost $ | Present Worth Cost $ |
---|---|---|---|
8 | Reseal the Joint | 210,562.00 | $153,855.59 |
16 | Reseal the Joint | 210,562.00 | $112,420.77 |
24 | Reseal the Joint | 210,562.00 | $82,144.76 |
30 | Mill and Functional Overlay | 4,052,150.00 | $1,249,353.49 |
33 | Joint Seal | 181,975.00 | $49,878.29 |
36 | Joint Seal | 181,975.00 | $44,341.62 |
39 | Joint Seal | 181,975.00 | $39,419.53 |
42 | Mill and Resurface | 1,947,254.00 | $374,992.30 |
45 | Joint Seal | 181,975.00 | $31,153.83 |
48 | Joint Seal | 181,975.00 | $27,695.64 |
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: 11 inches PCCP | Alternative 2: 13.5 inches HMA | ||
---|---|---|---|---|
Agency Cost ($1000) | User Cost ($1000) | Agency Cost ($1000) | User Cost ($1000) | |
Undiscounted Sum | $7,540.97 | $0.00 | $8,447.90 | $0.00 |
Present Value | $2,165.26 | $0.00 | $3,434.00 | $0.00 |
EUAC | $100.79 | $0.00 | $159.85 | $0.00 |
Lowest Present Value Agency Cost | Alternative 1: 11 inches PCCP | |||
Lowest Present Value User Cost | Alternative 1: 11 inches PCCP |
Year | Alternative 1: 11 inches PCCP | Alternative 2: 13.5 inches HMA | ||
---|---|---|---|---|
Agency Cost ($1000) | User Cost ($1000) | Agency Cost ($1000) | User Cost ($1000) | |
0 | ||||
1 | ||||
2 | ||||
3 | $181.98 | |||
4 | ||||
5 | ||||
6 | $181.98 | |||
7 | ||||
8 | $210.56 | |||
9 | $181.98 | |||
10 | ||||
11 | ||||
12 | $181.98 | |||
13 | ||||
14 | ||||
15 | $181.98 | |||
16 | $210.56 | |||
17 | ||||
18 | $181.98 | |||
19 | ||||
20 | $4,002.88 | |||
21 | ||||
22 | ||||
23 | $181.98 | |||
24 | $210.56 | |||
25 | ||||
26 | $181.98 | |||
27 | ||||
28 | ||||
29 | $181.98 | |||
30 | $4,052.15 | |||
31 | ||||
32 | $181.98 | |||
33 | $181.98 | |||
34 | ||||
35 | $1,897.37 | |||
36 | $181.98 | |||
37 | ||||
38 | $181.98 | |||
39 | $181.98 | |||
40 | ||||
41 | $181.98 | |||
42 | $1,947.25 | |||
43 | ||||
44 | $181.98 | |||
45 | $181.98 | |||
46 | ||||
47 | $181.98 | |||
48 | $181.98 | |||
49 | ||||
50 |