ESBD_373826_1726064134643_RFP 809-24-0016 Addendum 1.pdf
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- Solicitation number
- 809-24-0016
- Issued by
- Texas
About this file
This document is an addendum to a Request for Proposals (RFP) issued by the State Preservation Board (SPB) of Texas for the replication of a historic cast iron fountain centerpiece located at the Governor's Mansion. The addendum provides potential respondents with the estimated budget of $25,000 for the project and answers questions related to material requirements, aesthetic specifications, long-term maintenance expectations, and the integration of the water treatment system. The RFP seeks a turnkey solution that includes relocation, disassembly, cleaning, 3D scanning, reconstruction of the 3D model, pattern printing, casting in bronze, patination, and return of the replication to the site, with a preferred completion timeline by the end of February. The scope of work requires the contractor to choose the appropriate 3D scanning technology and resolution to accurately replicate the texture and ornamental details of the original cast iron piece.
The addendum clarifies that the SPB is willing to consider different alloys, as long as they are corrosion and water-resistant, with a dark patina that can gracefully fail over time. The agency also expects the patina to last 2-5 years under constant water flow before needing re-application, and is open to exploring high-performance coatings if the patina fails quickly. The successful contractor will need to integrate the replication with the existing water treatment system and consider the potential for highly alkaline or acidic environments in the future.
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State Preservation Board
RFP 809-24-0016
Governor’s Mansion Cast Iron Fountain Centerpiece Replication Addendum 1
POSTING DATE: September 10, 2024
PROPOSAL DEADLINE: Monday September 16, 2024 by 2:00pm CST
Addendum item #1: To provide potential Respondents with the estimated budget for this project.
Estimated budget: $25,000
Addendum item #2: To answer questions from potential Respondents which were submitted for clarification.
1. Question: Is there any flexibility in using other non-corrosive materials besides bronze, as long as they maintain the aesthetic integrity of the original piece?
Answer: We are willing to consider different alloys, so long as they are corrosion and water resistant, maintaining a black patina – not a coating—under running water. Darker metals are preferred to allow for more graceful failure of the black patina.
2. Question: Are there specific aesthetic requirements for the black patina finish (e.g., texture, sheen, or aging effects)?
Answer: As closely as possible replicating a solid black high gloss enamel paint when seen under running water.
3. Question: Are there any specific long-term maintenance expectations for the newly cast bronze piece (e.g., re-coating schedules or touch-ups)?
Answer: No coatings are anticipated. Re-patina'ing is expected, though life of the patina will depend on use. Assuming constant water flow 24/7/365, we expect the patina to last 2-5 years before needing re-application. If the patina fails quickly under running water, we can consider a high performance coating. We expect re-application of patina or coating could be done on site, but would be contracted separately when needed.
4. Question: What are the expectations for the water treatment system integration with the new bronze fountain? Are there existing guidelines to follow?
Answer: If talking about piping: the centerpiece will have a 1 5/8" outside diameter PVC upright threaded through the center of the stem and below as seen in "View 2” on page 7 of the solicitation, and in the photos below. Matching the form of the existing fountain will allow for this. The pipe should fit tightly enough to allow the bulk of water to flow off the edges. The pipe in the existing fountain is water-tight to some degree:
If talking about chemicals: part of the reason for this work is the need for a variety of chemical treatments that may be needed in the future to manage this shallow pool under both direct sun and under heavy tree growth in a residential environment. Future treatment could lead to highly alkaline or acidic environments. This is why we are moving to a non-corrosive metal without a layered coating system that would require abrasive preparation of the base metal for multiple re-coatings.
5. Question: Can you provide more details about the timeline for the pickup, disassembly, casting, and reassembly phases of the project?
Answer: Timeline is flexible, but would be preferred to be completed and returned by the end of February.
6. Is there a preferred 3D scanning technology or resolution requirement to ensure accuracy in replicating the historic fountain?
Answer: There is no preferred 3D scanning technology; we will rely on the contractor to choose the best technology to meet the goals of the project, given the 1:1 replication scale and the amount of detail in the original piece. Resolution should be determined by the contractor as required to replicate the texture of the cast iron as well as the highly ornamental, curvilinear bas relief decoration. Some detail of the surface of the original cast iron piece would be lost with the application of an enamel coating, which should be taken into consideration in the process. A resolution of about 1.0 mm would be expected. The contractor will need to provide file types of the 3D scan upon completion, .stl, .obj,..acis
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