Estimated Project Quantities.pdf

Item

No.

Item Code Item Unit Quantity Estimate Reference Notes

1 2502-8212104 SUBDRAIN, PLASTIC PIPE, 4 IN. LF 544.00

These items shall be non-perforated, dual wall, HDPE pipe and comply with Section 4146. Removal and disposal of existing subdrain tile and other accessories shall be incidental to these items. All fittings required to make connections or angles shall be included. Contractor shall note that not all subdrain items may be used but are included in case any one of these diameters are encountered. It is anticipated that work will include a 3"and 4" size subdrain pipe but sizes will need to be verified in the field. Payment will be per linear foot and will include pipe, fittings, collars, and all other materials necessary to complete the connections.

2 2105-8425015

TOPSOIL, STRIP, SALVAGE AND

SPREAD

CY 325.00 Quantity based on stripping 12" and spreading evenly across excavated area.

3 2599-9999009

STEEL ENCASEMENT FOR

SUBDRAIN TILE, TRENCHLESS, 8"

DIA.

LF 50.00

Item is for boring a trenchless 8"-minumum steel encasement across Ramp D (I-80 eastbound on Ramp). Steel encasement shall be a minimum 1/4" wall thickness. Installation will be in accordance with Standard Road Plan DR-302. Item shall include all costs to install steel encasement including encasement pipe, jacking pit, boring, labor and any other materials required to provide encasement. Method of Measurement: Iowa DOT will measure the length of encasement installed to the nearest foot. Basis of Payment: Payment to contractor shall be based on the contract unit price per linear foot of encasement installed.

4 2601-2634100 MULCHING ACRE 0.20

Perform mulching According to Article 2601.03, E, 2, of the Standard Specifications. Anchor mulch into the soil using mulch anchoring equipment with a minimum of two passes. Item is included for areas requiring reshaping and seedbed preparation. Use mulch that is Certified Noxious Weed Seed Free

Mulch as certified by the Iowa Crop Improvement Association or adjacent states Crop Improvement Associations. Mulch Rate: 1 1/2 tons of dry cereal straw of native grass straw per acre. Mulching: Mulching shall be applied as described in standard specification section 2601. After seeding, mulch all areas disturbed by grading.

5 2601-2642100

STABILIZING CROP - SEEDING AND

FERTILIZING

ACRE 0.20

Item is included for disturbed areas. Seed and fertilize all disturbed areas according to Article 2601.03, C, 1 of the Standard Specifications. If permanent seeding cannot be placed due to the restrictive planting dates, stabilizing crop will need to be placed on all disturbed areas as temporary erosion control. Preparation and seeding shall be performed in accordance with Section 2601. Stabilizing crop will not be used when the application dates in

Section 2601 allows permanent seeding. If stabilizing crop must be used, place immediately following completions of finished grading. Reseeding of these areas will be required at contractor's expense if damage occurs due to contractor's negligence during the contract period.

6 2602-0000020 SILT FENCE LF 700.00 Item is to be installed as needed during the course of the project to prevent any silt from entering the stream or leaving the project.

7 2602-0000071

REMOVAL OF SILT FENCE FOR SILT

FENCE FOR DITCH CHECKS

LF 700.00

Item is included for silt fence removal required for staging reasons, removal to allow for replacement (Replacement to be paid separately), or for areas that have achieved 70% permanent growth. Remove silt fence and posts after multching or vegetation is established and approved by the Engineer.

8 2602-0000312

PERIMETER AND SLOPE SEDIMENT

CONTROL DEVICE, 12 IN. DIA.

LF 700.00 Item is to be installed as needed during the course of the project to prevent any silt from entering the stream or leaving the project.

9 2602-0000351

REMOVAL OF PERIMETER AND

SLOPE OR DITCH CHECK SEDIMENT

CONTROL DEVICE

LF 700.00

Contractor Responsibilities: Ensuring that sediment control devices, including perimeter and slope sediment control devices, are removed following appropriate erosion control measures.

Site Conditions Considerations: The contractor must verify device placement and removal conditions in coordination with the project engineer.

Spacing Recommendations: Guidelines for sediment control device installation based on slope percentage and site-specific erosion control needs.

10 2601-2636041

SEEDING AND FERTILIZING

(RURAL)

ACRE 0.20

Seed and fertilize all areas disturbed in the right-of-way according to Article 2601.03, C, 3, of the Standard Specifications. Use ground driven equipment. Reseeding of these areas will be required at the contractor's expense if damage occurs due to contractor's negligence during the contract period.

11 2528-8445110 TRAFFIC CONTROL LS 1.00

Item is payment for all traffic control necessary to perform the work. Contractor will not be allowed to work from the shoulder or close any lanes of I-

80, I-280, or any ramps within the interchange. If work is within 15 feet of traveled way, contractor shall install Standard Road Plan TC-402. Otherwise install Standard Road Plan TC-1.

12 2533-4980005 Mobilization LS 1.00 Section 2533 shall apply.

ESTIMATED PROJECT QUANTITIES - REFERENCE NOTES

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*** STANDARD SPECIFICATIONS -- SERIES 2023 ***

The Iowa Department of Transportation STANDARD SPECIFICATIONS FOR HIGHWAY AND BRIDGE CONSTRUCTION, SERIES 2023, plus applicable General Supplemental Specifications, Developmental Specifications, Supplemental Specifications AND Special Provisions shall apply to construction work on this contract.

GS-23003: GENERAL SUPPLEMENTAL SPECIFICATIONS FOR HIGHWAY AND BRIDGE CONSTRUCTION Electronic Reference Library - Iowa Department of Transportation - October 17, 2023 https://iowadot.gov/erl/current/GS/Navigation/nav.htm