# Construction Cost Estimate

# Examples

+-----------------------------------------------------------------------+
| **4R Examples**                                                       |
+-----------------------------------------------------------------------+
| The preliminary 30% cost estimate (class "C") for this project was    |
| \$17,235,000. This estimate includes major pay items (excavation,     |
| surfacing quantities, etc...) and includes a 20% contingency for      |
| small work items, a 10% contingency for traffic control and a 5%      |
| contingency for erosion control (See appendix G).                     |
|                                                                       |
| The cost estimates for the five alternatives that will be presented   |
| in the Environmental Document are as follows (contingency amounts are |
| the same as those listed above):                                      |
|                                                                       |
| *Alternative 1*: No Action                                            |
|                                                                       |
| *Cost Estimate*: N/A                                                  |
|                                                                       |
| *Alternative 2*: Reconstruction of the roadway along the existing     |
| alignment. Two minor realignment sections are proposed, including     |
| Bandit Curve and Hollowell Park. This alternative would utilize       |
| retaining walls along the edge of Glacier Creek to minimize resource  |
| impacts. This alternative would not address a multi-use path.         |
|                                                                       |
| *Cost Estimate*: \$18,848,000                                         |
|                                                                       |
| *Alternative 3*: Reconstruction of the roadway including three        |
| realignment sections. Realignments include Bandit Curve, Hollowell    |
| Park and relocation away from Glacier Creek. Under this alternative,  |
| half of the abandoned roadway near Glacier Creek would be             |
| rehabilitated and reclaimed using FLHP funds. The other half of the   |
| roadway would be converted into a multi-use trail. The remaining      |
| segments of the multi-use trail, from the YMCA to Bandit Curve, and   |
| from the Park and Ride facility to Sprague Lake, would be constructed |
| by the NPS using a separate funding source. A small parking area      |
| would be constructed just north of the Park and Ride to allow for     |
| visitor parking to access the multi-use trail.                        |
|                                                                       |
| *Cost Estimate*: \$17,065,000                                         |
|                                                                       |
| *Alternative 4*: Reconstruction of the roadway including three        |
| realignment sections. Under this alternative, all of the abandoned    |
| roadway near Glacier Creek would be reclaimed using FLHP funds.       |
| Bicycle lanes would be constructed along the shoulders of the roadway |
| from Hollowell Park to just north of the Park and Ride using FLHP     |
| funds. The remaining segments of the multi-use trail, from the YMCA   |
| to Hollowell Park, and from the Park and Ride to Sprague Lake, would  |
| be constructed by the NPS using a separate funding source.            |
|                                                                       |
| *Cost Estimate*: \$17,695,000                                         |
|                                                                       |
| *Alternative 5*: Reconstruction of the roadway along the existing     |
| alignment. Two minor realignment sections are proposed, including     |
| Bandit Curve and Hollowell Park. Instead of utilizing retaining walls |
| along the edge of Glacier Creek, this alternative would shift the     |
| roadway into a cut section with increased resource impacts. This      |
| alternative would not address a multi-use path.                       |
|                                                                       |
| *Cost Estimate*: \$18,810,000                                         |
+-----------------------------------------------------------------------+
| The preliminary 30% cost estimate (class "C") for this project is     |
| \$970,000. This estimate includes major pay items (excavation,        |
| aggregate surfacing quantities, drainage, etc...) and includes a 30%  |
| contingency for small work items. The cost does [not]{.underline}     |
| include a cost for widening and/or a wall at the Burr Canyon Side     |
| drainage due to the limited survey information. Also, the cost does   |
| [not]{.underline} include any cost for revegetation and/or            |
| mitigation. Revegetation/mitigation measures will be discussed at the |
| 30% Design Review if required. The current funding available for this |
| project is \$989,000.                                                 |
+-----------------------------------------------------------------------+
| The construction cost estimate for the Segment 3 50% design was       |
| \$11,710,000 (April 2006).                                            |
|                                                                       |
| The current construction cost estimate for the Segment 3 70% design   |
| is \$12,141,000.                                                      |
|                                                                       |
| **Significant Changes**                                               |
|                                                                       |
| Major changes to the cost estimate resulted from a larger volumes of  |
| Roadway Excavation, Waste and higher Wall cost. Roadway Excavation    |
| changed from 148,000 CY to 155,000 CY and Waste changed from 29,500   |
| CY to 46,400 CY based on the new alignment. The retaining wall's      |
| increase in cost of \$236k is due to the increase in Soil Nail Wall   |
| area and the addition of two new items, Rockery Wall and Shotcrete.   |
| The soil nail wall area increased by 1,350 SY based on the SMSE wall  |
| design and tiering one soil nail wall. The MSE wall area was reduced  |
| by 1,763 SY, however, the unit price for MSE walls is \$150 /SY less  |
| then soil nail walls.                                                 |
|                                                                       |
| Using the CFL -- Engineer Estimate Inflation Spreadsheet, which       |
| applied inflation rates of 18% through 1/1/2008 and 12% beyond        |
| 1/1/2008, results in a construction cost estimate of                  |
| [\$16,475,000]{.underline} in March of 2009 and                       |
| [\$18,195,000]{.underline} in March of 2010.                          |
+-----------------------------------------------------------------------+
| **3R Examples**                                                       |
+-----------------------------------------------------------------------+
| The engineer's estimate for the 95% PS&E submittal is \$2,295,000.00  |
| including a \$25,000 incentive for meeting an interim completion      |
| date.                                                                 |
|                                                                       |
| The engineer's estimate at the 70 % submittal was \$2,020,000. Main   |
| increases in cost were due to revised quantities or estimated unit    |
| costs based on the anticipated complexity of the work for the         |
| following items: Surveying, clearing and grubbing, subexcavation,     |
| pavement milling and placement, additional roadway aggregate to       |
| supplement millings if needed, and additional equipment hours to      |
| cover unknown work items.                                             |
+-----------------------------------------------------------------------+
| The current engineer's estimate for this project is \$664,659.30. The |
| engineer's estimate at 70% was \$1,038,298.75. The cost difference in |
| these estimates is due to the following items/issues:                 |
|                                                                       |
| [Cost sharing by Garfield County]{.underline}                         |
|                                                                       |
| As part of this project Garfield County will assist with the          |
| construction cost. The 95% engineer's estimate is based on Garfield   |
| County providing the following:                                       |
|                                                                       |
| -   Roadway aggregate: Contractor will have access to material        |
|     stockpiled by the County approximately 12 miles from the project  |
|     site at the Eggnog Pit.                                           |
|                                                                       |
| -   Riprap: Contractor will have access to material stockpiled by the |
|     County approximately 12 miles from the project site at the Eggnog |
|     Pit.                                                              |
|                                                                       |
| -   Select Borrow: Contractor will have access to material stockpiled |
|     by the County approximately 12 miles from the project site at the |
|     Eggnog Pit.                                                       |
|                                                                       |
| -   Cattleguard: County will supply one cattleguard to the contractor |
|     for replacement of the existing cattleguard. The Park will        |
|     provide the other cattleguard.                                    |
|                                                                       |
| -   Concrete barrier: County will provide concrete barrier to be used |
|     as a cutoff wall at unvented low water ford locations.            |
|                                                                       |
| -   Signing: Signs will be installed by the contractor.               |
|                                                                       |
| -   Culverts and End sections: Culverts and end sections will be      |
|     installed by the contractor.                                      |
|                                                                       |
| -   Waste: Contractor will stockpile waste on site which the County   |
|     will haul off site and dispose of.                                |
|                                                                       |
| > With the supply of materials by the County, the cost estimate for   |
| > this project has decreased significantly.                           |
|                                                                       |
| Other                                                                 |
|                                                                       |
|                                                                       |
| -------------- ------------------ ----------------- ----------------- |
|   **Pay Item     **Description**    **70%             **95%           |
|   \#**                              Quantity/Cost**   Quantity/Cost** |
|                                                                       |
|   15216-2000     Survey and         0/\$0             42.13           |
|                  Staking, Grade                       Sta./\$8,847.30 |
|                  Finishing Stake                                      |
|                                                                       |
|   *Item added                                                         |
|   for                                                                 |
|   construction                                                        |
|   of Roadway                                                          |
|   Aggregate.*                                                         |
|                                                                       |
|   15701-0000     Soil Erosion       LS/\$8,000        \$30,100 (Cost  |
|                  Control                              for silt fence  |
|                                                                       |
|                                                     and sediment log) |
|                                                                       |
|   *Item was                                                           |
|   broken out at                                                       |
|   95% with a                                                          |
|   more accurate                                                       |
|   quantity                                                            |
|   takeoff.*                                                           |
|                                                                       |
|                                                                       |
| 20401-0000     Roadway Excavation 3,000 cy/\$51,000 1,440 cy/\$24,480 |
|                                                                       |
|   *Profile was                                                        |
|   adjusted due                                                        |
|   to a change in                                                      |
|   the thickness                                                       |
|   of the roadway                                                      |
|   aggregate.*                                                         |
|                                                                       |
|   25101          Placed Riprap (All 1,570             1,330/\$47,880  |
|                  classes)           cy/\$138,700                      |
|                                                                       |
|   *Material will                                                      |
|   be supplied by                                                      |
|   the County.*                                                        |
|                                                                       |
|   30801          Roadway Aggregate  7,425             1,970 cy /      |
|                                     tons/\$207,900    \$23,640        |
|                                                                       |
|   *Thickness                                                          |
|   reduced from                                                        |
|   12 inches to 8                                                      |
|   inches.*                                                            |
|                                                                       |
|   50101-0900     Reinforced Rigid   1,350             1,610           |
|                  Pavement           sy/\$101,250      sy/\$201,250    |
|                                                                       |
|   *Unit cost                                                          |
|   increased to                                                        |
|   reflect                                                             |
|   current                                                             |
|   costs.*                                                             |
|                                                                       |
|   60201          Pipe Culverts (All 780 lf/\$91,850   710 lf/\$44,000 |
|                  sizes)                                               |
|                                                                       |
|   *Culverts to                                                        |
|   be supplied by                                                      |
|   the County.                                                         |
|   Unit cost                                                           |
|   decreased.*                                                         |
|                                                                       |
|   61801-0000     Concrete Barrier   800 lf/\$48,000   750 lf/\$9,000  |
|                                                                       |
|   *Barrier to be                                                      |
|   supplied by                                                         |
|   County. Unit                                                        |
|   cost                                                                |
|   decreased.*                                                         |
|                                                                       |
| -------------- ------------------ ----------------- ----------------- |
|                                                                       |
| The remaining difference in cost is due to modifications to the       |
| design from 70% to 95% and a more complete quantity takeoff.          |
+-----------------------------------------------------------------------+
| The preliminary 70% cost estimate for this project is \$2,575,000 in  |
| 2007 dollars. Adjusting for inflation (+12%), the estimate in the     |
| year 2008 is \$2,770,000. This estimate includes major pay items      |
| (excavation, surfacing quantities, etc...). The current funding       |
| available for this project is \$2,800,000.00.                         |
+-----------------------------------------------------------------------+