Key takeaways
Historic-stone work is an inventory-control project as much as a paving project.
Underground utilities, drainage, accessibility and surface stone must be coordinated as one system.
Salvaged units need location records, protected storage, sorting criteria and an approved replacement strategy before removal begins.
DUMBO is a useful regional case study, not a universal specification; every municipality must follow its own design, preservation, accessibility and procurement requirements.
In November 2025, New York City announced completion of a $108 million infrastructure project across 26 blocks of DUMBO. The work combined restored cobblestone streets with new granite curbs, pavers and bike paths, while upgrading drainage, sewers and water mains below. The project began in 2019 and was led by the NYC Department of Design and Construction for agency partners including NYC DOT and DEP (NYC DOT, November 19, 2025).
The useful lesson for municipal teams, designers, contractors and masonry dealers is not that every historic street should copy DUMBO. It is that stone procurement cannot be separated from preservation intent, accessibility, underground coordination, handling and sequencing.
What should teams plan before procuring stone for a historic streetscape?
Before procurement, define which existing units must return to their original locations, how they will be documented and stored, what makes a salvaged unit reusable, which new materials may be introduced, and who approves visual and dimensional compatibility. Coordinate those decisions with utility phasing, drainage elevations, accessible routes, mockups, delivery constraints and replacement quantities.
1. Treat salvaged stone as controlled inventory
NYC reported that tens of thousands of cobblestones were removed, restored and returned. Community input led the project team to store removed cobbles off-site and return them to the block where they originated. Cobblestones from the new Pearl Street Plaza were repurposed where needed on other blocks (NYC DOT).
A workable salvage plan should identify:
the source block or work zone;
quantity and condition at removal;
pallet or container identifier;
acceptable cleaning method;
dimensional and condition sorting rules;
protected storage location;
approved destination; and
responsibility for loss, breakage and shortage reconciliation.
Without this chain of custody, “reuse existing stone” can become an unpriced sorting exercise or a late replacement-material emergency.
2. Separate appearance from performance requirements
DUMBO paired historic cobbles with new materials intended to harmonize with the historic district. The finished work included historically accurate granite curbs and smooth granite paths integrated into cobblestone streets. NYC reported more than 12,000 feet of new granite curb, 8,800 feet of granite bike lanes and 114 ADA-compliant pedestrian ramps (NYC DOT).
“Match existing” is not a complete stone specification. Teams should separately define material type, color range, finish, dimensions, tolerances, edge condition, slip-related requirements where applicable, freeze-thaw exposure, intended loading, bedding/jointing system and the approval process. Applicable project documents and authorities—not appearance alone—control acceptance.
3. Coordinate the surface with everything below it
The DUMBO project installed or upgraded more than three miles of storm sewers, sanitary sewers and water mains. It also added 2,735 feet of storm sewer, upgraded 32 catch basins, added 46, and converted 2,121 feet of combined sewer to dedicated sanitary sewer (NYC DOT).
That matters to stone procurement because utility sequencing affects when stone can be removed, stored, delivered and reset. Drainage structures affect cuts and elevations. Reopened work can disturb finished paving. A procurement schedule should therefore follow the coordinated construction sequence, not simply the bid quantity.
A practical procurement checklist
| Decision | Question to resolve before release |
| Preservation | Which units must be retained, and must they return to the same block or location? |
| Survey | Are field dimensions, elevations and quantities verified? |
| Approval | Who approves samples, mockups and replacement stone? |
| Accessibility | Where are smooth routes, ramps and transitions required by project documents? |
| Handling | How are units labeled, cleaned, protected and tracked? |
| Replacement | What shortage/breakage allowance is authorized, and what constitutes a compatible replacement? |
| Logistics | Can trucks, pallets and staging fit the work-zone restrictions? |
| Utilities | Which underground milestones must occur before surface installation? |
| Closeout | Will spare matching material and final location records be retained? |
What DUMBO demonstrates—and what it does not
The project demonstrates that preservation and modernization can be procured together when responsibilities and materials are explicit. It does not establish a universal detail, prove that one stone assembly fits every street, or replace local preservation, accessibility, engineering and procurement review.
Frequently Asked Questions
Why must salvaged cobblestones be tracked by location?
Location tracking preserves design intent, supports quantity reconciliation and helps return units to designated areas. In DUMBO, removed cobblestones were stored off-site and returned to their original blocks following community input, according to NYC DOT.
Is “match existing” enough for replacement stone?
No. A usable specification should define measurable material, finish, size, tolerance, edge, performance and approval criteria. Visual compatibility is important, but it does not replace project-specific technical requirements.
How do underground utilities affect stone procurement?
Utility sequencing determines removal, storage, delivery and reset dates; drainage structures also affect paving elevations and cuts. Stone releases should follow the coordinated construction schedule.
Can accessibility be integrated into a historic cobblestone street?
Yes, when approved project design integrates suitable routes and transitions. DUMBO used smooth granite paths within cobblestone streets, but each project must follow its applicable requirements and approvals.
Should a project order spare matching stone?
The design and owner teams should decide a documented allowance based on breakage, field cuts, uncertain salvage yield and future repairs. Do not apply a generic percentage without project-specific quantity and risk review.
What should a dealer request before quoting a municipal stone package?
A dealer should request current drawings, specifications, schedules, quantities, finishes, tolerances, sample/mockup requirements, packaging, delivery restrictions, alternates and the named approval authority. Clarify whether quantities include salvage shortages and spares.
Sources & Further Reading
NYC Department of Transportation, “City Completes $108 Million Historic Street Restoration and Upgrade in Dumbo,” November 19, 2025: https://www.nyc.gov/html/dot/html/pr2025/city-completes-historic-street-restoration-dumbo.shtml
NYC Department of Transportation, “Street Design Manual,” current public reference; confirm the edition governing any specific project: https://www.nycstreetdesign.info/
Plan the stone package before the street opens up
Historic streetscape work rewards early coordination. StoneWorks can help authorized dealers and trade partners organize product questions, sample requests and project timing across a broad architectural and landscape-stone product universe. Final material selection, detailing and compliance remain with the project’s qualified design, engineering and construction teams. Contact StoneWorks through your authorized dealer channel to begin a project-specific product conversation.