Graded Aggregate Base

The Washington Suburban Sanitary Commission, MD (the "WSSC"), is soliciting sealed responses for Graded Aggregate Base. Responses are to be submitted via WSSC's eProcurement Portal via https://procurement.opengov.com/portal/wsscwater PRIOR TO 2:00 pm on Thursday, April 16, 2026. Late responses will not be accepted.

The Washington Suburban Sanitary Commission (WSSC) Procurement Office seeks a firm to supply and deliver Graded Aggregate Base for earth work to maintain 5,600 miles of freshwater pipeline and more than 5,400 miles of sewer pipeline infrastructure in Montgomery and Prince George's Counties.

Background

WSSC is seeking a Contractor to provide Graded Aggregate Base for supportive foundation and backfill material for WSSC underground water treatment structures. Over the past five years, WSSC has utilized 119,544 tons of Graded Aggregate Base to maintain it's water infrastructure.

Project Details

• Reference ID: 100581
• Department: Procurement Office
• Department Head: Caprecia Poole-Willams (Chief Procurement Officer)

Important Dates

• Questions Due: 2026-04-06T18:00:00.000Z

Evaluation Criteria

• Key Personnel (35 pts)
• Firm's Experience (30 pts)
• Technical Approach (20 pts)
• Price (15 pts)

Submission Requirements

• MINIMUM QUALIFICATIONS
• Is the Bidder a manufacturer or authorized distributor of Graded Aggregate Base certified by the Maryland State Highway Administration, Office of Materials Technology (MSHA-OMT)? (required)
• File Upload (required) —

  The Bidder must provide proof that the graded aggregate base they are providing is listed as a qualified producer/manufacturer on the MSHA-OMT site https://www.roads.maryland.gov/OMT/grdaggbase.pdf. 

  If the Bidder is not listed as a qualified producer/manufacturer by MSHA-OMT, such Bidder must provide a letter from the approved producer/manufacturer authorizing the distribution of approved graded aggregate base.

  If MSHA-OMT did not list the Bidder as a qualified manufacturer, the Bidder must provide a letter from MSHA-OMT confirming that their graded aggregate base is to be added to the approved vendor list: https://www.roads.maryland.gov/OMT/grdaggbase.pdf. 

• Does the Bidder have a minimum of three (3) years of experience in providing Graded Aggregate Base? (required)
• Document Upload (required) —

  The Bidder must provide proof that their company has been in business for a minimum of three (3) years, providing graded aggregate base. At a minimum, the bidder must provide the following information: 

  1. 1. 1. Company name and business address
        2. Number of years in operation
        3. Description of products and services providing  graded aggregate base
        4. At least three (3) contracts performed within the last three (3) years, including:
  1. 1. 1. 1. client name
           2. email address
           3. contract title
           4. Description of work performed, providing  graded aggregate base
           5. amount
           6. duration of contract (start and end dates).
• Appendix A: OSDI PARTICIPATION
• Does your firm meet the MBE Optimization of Diverse Business Development Program requirements? (required)
• Provide proof of approve MBE business certifications (required)
• Does your firm meet the SLBE Optimization of Diverse Business Development Program requirements? (required)
• Provide proof of approve SLBE business registrations (required)
• Does your firm meet the MBE/SLBE Optimization of Diverse Business Development Program requirements? (required)
• Provide proof of approve MBE business certifications and/or SLBE business registrations (required)
• Please download and complete the attached OSDI Forms (required) —

  Please download the below documents, complete, and upload.

• Appendix B: CERTIFICATE OF INSURANCE
• Please upload your up to date Certificate of Insurance here (required)
• Appendix C: SUBMISSION FORMS
• CONSENT TO USE OF ELECTRONIC SIGNATURE (required) —

  Please download the below documents, complete, and upload.

• CERTIFIED INSURANCE CONFIRMATION (required) —

  I certify that I will have on file within 10 days of Notice of Award, Certificates of Insurance acceptable to the Commission, meeting all requirements set forth in the Contract Document.

• CONTRACT CERTIFICATION AFFIDAVIT (required) —

  Please download the below documents, complete, and upload.

• IRAN INVESTMENT ACTIVITY CERTIFICATION (required) —

  Please download the below documents, complete, and upload.

• STATEMENT OF BIDDER’S QUALIFICATIONS FORM (required) —

  Please download the below documents, complete, and upload.

• Will the Bidder maintain a knowledgeable representative/project manager for the duration of the contract to answer questions and solve problems, and commit to notifying the contract manager of any personnel changes? (required)
• The bidder must submit their personnel (s) or project manager (s) who will be the point of contact for this contract. The bidder must confirm that the personnel(s) or Project Manager must be available to answer questions and solve any problems associated with this contract; should the contact person change, the bidder must promptly notify the contract manager. (required)
• Technical Proposal (WITHOUT COST) (required) —

  Please upload your technical proposal here

• CONSULTANT CONFLICT OF INTEREST AFFIDAVIT (required) —

  Please download the below documents, complete, and upload.

• STATEMENT OF OFFEROR’S QUALIFICATIONS FORM (required) —

  Please download the below documents, complete, and upload.

• PRICING
• Please upload your pricing here (required)
• Are you registered in WSSC Water's Supplier Portal? (required)
• Please provide your Supplier Portal identification number (ID): (required)
• Please confirm that you have registered prior to bid submittal (required) —

  Please register at: www.wsscwater.com/supplier.

• Prompt Payment Discount (required)
• Solicitation Purpose? (required)
• RFP purpose? (required)
• IFB Purpose (required)
• General Terms and Conditions? (required)
• How will you be collecting pricing? (required) —

  Select electronic pricing table if providing line items for the vendor to fill out

• Bonding Requirements? (required)
• Please select all relevant insurance types: (required)
• Will you be awarding a single or multiple vendors? (required)
• Will the Mid-Atlantic Purchasing Team Intergovernmental & Cooperative Purchasing Clause apply? (required) —

  Select yes to show the Mid-Atlantic Purchasing Team Intergovernmental & Cooperative Purchasing Clause in the attachments

• Identify OSDI's Participation Recommendation (required)
• MBE Bid Price Preference: (required)
• SLBE Bid Price Preference: (required)
• MBE/SLBE Goal (required)
• Select the Optimization of Diverse Business Development Program (required)