Concrete Greenhouse Floors in Prosser, WA

Statement of Work (SOW)

To mitigate contamination issues with a persistent pathogen of potato, Spongospora subterranea, by replacing the rock bed/dirt below benches in potato greenhouses with cement and adding proper drainage.

• Removal and reinstallation of existing tables.

• Excavation to required depth.

• Placement and compaction of gravel base.

• Installation of rebar dowels.

• Formwork.

• Concrete placement and finishing (4-inch thickness with light broom finish).

• Installation of floor drains (except in Building 112).

• Site restoration.

• Building 101 (Sections A-B)

• Building 102 (Sections H-J)

• Building 112

• 101A and B: Remove existing gravel, place vinyl trench drains (4 strips, 2/in.ft. each, sloping at 2% grade), and place 4-inch concrete.

• 102H: Remove gravel, place vinyl gutter (58 in.ft.), and place concrete.

• 102I: Remove gravel, place 4-inch concrete, and install 4 strips of trench drain (12 ft long).

• 102J: Demolish existing sidewalk, remove gravel, place gutters (114 in. ft.), and place 4-inch concrete.

• 112: Remove existing gravel (sloping towards existing sidewalk) and place 4-inch concrete.

Not specified in the document.

• Contractor POC: Chris Raver (chris.raver@usda.gov)
• Removal of contaminated rock bed and soil is required to eliminate the pathogen source.
• Drainage installation to allow adequate water removal.

Amendment / Modification

This document is a modification to a General Decision Number WA20260119. It includes an updated publication date of May 18, 2026, superseding the previous date of January 2, 2026. The modification lists prevailing wage rates and fringes for various construction trades and operator classifications in Washington Counties of Yakima.

• The primary change is the update to the publication date of the wage determination.
• Prevailing wage rates and fringe benefits for the following trades/operators are listed:
  • Heat & Frost Insulator
  • Bricklayer
  • Tile Setter / Tile Finisher
  • Carpenter
  • Electrician
  • Various heavy equipment operators (Bulldozer, Blade Finish, Paver, Grader/Blade, Loader)
  • Ironworker
  • Laborers (Form Stripping, Jackhammer, Nozzle Person, Mason Tender Brick, Fire Watch, Hod Carrier, Scaffold Builder)
  • Painter
  • Pipefitter
  • Roofer
  • Sheetmetal Worker
  • Sprinkler Fitter
  • Plumber
  • Truck Drivers (Concrete Truck, Dump Truck)
  • Concrete Pump Operator
  • Drill Operator
  • Crane Operator
  • Grade Checker

This modification updates the prevailing wage rates. Bidders should ensure they are using the most current wage determination for their proposals, as these rates are applicable to contracts awarded under the Davis-Bacon Act. The document also references Executive Orders 13706 (Paid Sick Leave) and 13658 (Minimum Wage), which may impact contract requirements and worker compensation.

Solicitation / RFP / RFQ

This solicitation is for "Concrete Greenhouse Floors" to be performed in Prosser, WA. The project involves replacing existing gravel floors with concrete in greenhouses.

• Removal and reinstallation of existing tables.

• Excavation to required depth.

• Placement and compaction of gravel base.

• Installation of rebar dowels, formwork, and concrete placement/finishing.

• Installation of new floor drains in specified sections (excluding Building 112).

• Specific tasks include removing existing gravel, placing vinyl trench drains, and pouring concrete with a light broom finish for sections 101A, 101B, 102H, 102J, and 112.

• Demolition of existing sidewalk in section 102J.

• Contract Type: Firm Fixed-Price.

• Period of Performance: 120 days after award.

• Submission Deadline: June 10, 2026, by 5:00 PM local time.

• Submission Method: Email to david.hildebrand@usda.gov with subject line "RFQ 1232SA26Q0690".

• Evaluation: Lowest Priced Technically Acceptable (LPTA) source selection.

• Key Factors for Evaluation:

  • Fully completed SF 1442 and SF 30s.
  • Fully executed Bid Bond (SF 24) for not less than 20% of proposed price, not to exceed $50,000.
  • Two recent and relevant references with contact information.
  • CPARS ratings (if applicable).

• Offerors must submit pricing for all items to be considered responsive.

• Competition is set aside for Historically Underutilized Businesses (HUBZone).

• Applicable NAICS code: 238110-Poured Concrete Foundation and Structure Contractors.

• Prospective offerors must be registered with Systems for Award Management (SAM.gov) at the time of quote submission.

• The solicitation incorporates numerous FAR clauses by reference. Full text is available upon request or electronically.

• Offerors must provide a transmittal summary letter, completed SF 1442, and a bid bond.