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United States Department of the Interior

NATIONAL PARK SERVICE

DENVER SERVICE CENTER

CONTRACTING SERVICES

1 DENVER FEDERAL CENTER, BUILDING 50

P.O. BOX 25287

DENVER, COLORADO 80225-0287

File Code: A14

NAMA 326209

Date: August 17, 2026

To: General Public (Via the Government’s Point Entry)

From: Tim Burger, Contracting Officer, National Park Service, Denver Service Center

Subject: Sources Sought Notice

Reference: NAMA 326209 - Rehabilitate Seawalls and Shoreline (Phase III) East Potomac Park Potomac River, Channel Side, and Tidal Basin

** This is a SSN for the purpose of conducting Market Research. Proposals are NOT being requested, nor accepted at this time. Responses are being requested from both Large and Small Businesses. **

1. Purpose:

a. The purpose of this SSN is to gain knowledge regarding the types of interested businesses and their qualifications. Information obtained through this SSN by the NPS will be utilized to develop the acquisition strategy. The amount of interest, or lack thereof, will determine the possibility of a Small Business or other Socio-Economic Set-Aside for solicitation and award purposes. Analysis of the quality of responses to this SSN will be considered in the Market Research being conducted and in the making of any set-aside determination for this requirement.;

b. The Government anticipates conducting a competitive acquisition for this requirement. The amount of interest or lack thereof will determine the possibility of a small business or other socio-economical small business set-aside for the solicitation. Analysis of the quality of responses to this source sought announcement will be considered in the market research being conducted, and in the making of any small business set-aside determination for this requirement; and

c. No solicitation, proposal package, specifications, or drawings are available with this SSN.

2. Cost Reimbursement: Response to this announcement is strictly voluntary. No reimbursement will be made for any costs associated with providing information in response to this SSN, nor any follow-up information requests.

3. Bonding: Bid, Performance, and Payment Bonds are anticipated to be required.

4. North American Industry Classification System (NAICS) code: 237990 and Size Standard: $39.5M

5. Project Description:

a. The project is located at National Mall and Memorial Parks, Washington D.C.;

b. The surrounding area is urban or rural with limited staging located at a location to be determined;

c. The construction site is 5 of miles from nearest suppliers and lodging facilities;

d. The Park will remain open during construction, thus contract activities and logistics must be structured and scheduled to minimize visitor impact;

e. The site requires protective measures to ensure the surrounding area remains undisturbed;

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f. The structure is a historic/natural/cultural resource;

g. The anticipated period of performance of 1825 calendar days including any potential weather shutdown;

and

h. Winter construction may be required.

6. Project Scope:

This project will rehabilitate two sections of seawalls in East Potomac Park (EPP). The first section will begin at the Inlet Bridge and extend south along the Potomac River to include Hains Point. The second section will begin at the Outlet Bridge and extend south along the Washington Channel to the I-395 bridge. The existing stone masonry seawall will be removed, and reconstruction will follow the historic alignment. Various seawall and shoreline stabilization alternatives will be evaluated. Portions of the design will be able to accommodate future vertical additions in response to sea level rise or increasing storm surge elevations. The existing sidewalk and railing along the seawall will be reconstructed to provide a continuous pathway along EPP and connect to existing realigned pathways for accessible access to the seawall. Existing landscaping adjacent to the seawall will be replaced and graded to provide proper drainage.

This project will also rehabilitate the remaining portions of the failing Tidal Basin. The existing stone masonry seawall will be removed and reconstructed along the historic alignment and historical functional height.

Designs will include foundations that can bear the weight of additional stone and concrete, which will allow the walls to be extended vertically in response to future sea level rise or increasing storm surge elevations.

Where feasible, stone masonry from the historic wall will be salvaged and reused in the reconstruction.

7. Solicitation: At this time, NPS DSC anticipates issuing a competitive Request for Proposals (RFP) around the fall of 2026; and awarding a single Firm-Fixed-Price (FFP) contract.

8. Submittal Instructions: Responses from interested Contractors shall respond no later than 3:00 Mountain Time (MT) on September 2, 2026, by emailing the questionnaire to the Contract Specialist at:

kristin_tauber@ios.doi.gov and Contracting Officer at : timothy_burger@ios.doi.gov .