# America Actually Built Something On Time and On Budget ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t0048.webp]] **Creator:** The B1M · **Presenter:** Fred Mills · **Published:** 2026-09-30 · **Length:** 22:37 · [Watch on YouTube](https://www.youtube.com/watch?v=CBXkSJT1a7w) > Caption source: YouTube English (en-GB) manual captions via the transcript API (yt-dlp's subtitle download hit HTTP 429). Chapters from the video description; full written story on theb1m.com. ## Outline ### 0:00 Intro - **0:00** Cold open on site: construction in full swing while trains keep crossing the bridge right beside it. - **0:08** Park Avenue, New York, is famous for its buildings, but beneath and beyond it runs one of North America's most important rail lines, used by hundreds of thousands of commuters a day. - **0:26** Those commuters have been carried over a structure more than 130 years old that reached the end of its life and has to be completely replaced. - **0:36** The hook: giant custom-made machines, live trains, millions of riders, and a clock ticking down to the Monday morning rush hour. ### 1:09 Metro-North Railroad - **1:13** 4:39 a.m. in a sleepy New York; the crew has already been up for hours. - **1:46** Grand Central Terminal, nearly empty at 5:20 a.m. on a Saturday. ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t0108.webp]] - **2:06** Riding one of America's busiest railways from Grand Central up to Harlem; this is one of five lines making up the **Metro-North Railroad**, with well over 200,000 weekday passengers. - **2:27** The eastern network runs from central Manhattan to the suburbs of New York State and Connecticut, and commuters have relied on it for almost two centuries. - **2:38** It began as three railways merged in the 1800s: the **New York and Harlem Railroad**, the **Hudson River Railroad** and the **New York and New Haven Railroad**, a merger led by **Cornelius Vanderbilt**. - **2:58** Vanderbilt commissioned the **Grand Central Depot** in 1871; it lasted just over 30 years before passenger growth forced its replacement with today's **Grand Central Terminal** (between One Vanderbilt and the Chrysler Building). - **3:32** When the terminal opened in 1913, the tracks to the north were put below grade, capped and covered; before that trains ran through open trenches. - **3:46** Broad malls were built over the tracks as part of the **Fourth Avenue Improvement Project** (Fourth Avenue being Park Avenue's former name), which wasn't a desirable street then but is now some of the world's most expensive real estate. ### 4:30 Park Avenue Viaduct - **4:51** 6 a.m. Saturday and the site is a hive of activity: trucks arriving, old segments cut out and driven away, "like a well-oiled military operation." - **5:26** The **Park Avenue Viaduct** was completed a few years before work on the new Grand Central began. This means the big rail viaduct in Harlem, not the short road viaduct of the same name near Grand Central. ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t0330.webp]] - **5:47** It carries four tracks over Park Avenue from 97th Street to the Harlem River; after just over a mile of elevated steel, trains cross the **Harlem River Lift Bridge** into the Bronx. - **6:07** After more than 130 years and far more traffic than it was designed for, the **MTA** says it's showing signs of disrepair: a single point of failure on crucial infrastructure, with the risk of problems rising. ### 6:36 A Typical Weekend - **6:38** The MTA is replacing everything: foundations, structure and tracks, plus power, communications and signalling. - **6:50** Doing it all at once could close the railway for months or years, so the work happens in stages, on weekends. - **7:04** A typical weekend replaces eight pre-built bridge units: - Friday evening: lines shut and old track pulled up and stripped. - Overnight into Saturday: saw-cutting and removing deck panels and floor beams, then the outer fascia girders. - While demolition continues, prefabricated replacement segments start filling the gaps; by Saturday afternoon all new parts are in and track restoration begins. - **7:46** Only two tracks are worked on at a time, so a full weekend service of more than 400 trains a day continues beside the site. - **8:16** Sunday is for alignment, adjustment and testing before Monday service. They've never missed that deadline. - **8:28** MTA interview: replacing two tracks at a time over weekends was the only way, and the most cost-effective way, to avoid hurting the railroad, despite sceptics. - **8:52** The **MTA Construction and Development** division manages the project; **Halmar International** handles both design and build. - **9:00** This is a historic day: the last bridge-replacement outage, the 28th in 26 months. Tracks came out Friday night and half were back in service 15 hours later. ### 9:26 How It's Done - **9:29** Massive yellow gantries custom-built by **Mi-Jack Products** straddle the railway, so old pieces come out and new ones go in without taking up much street space. ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t0580.webp]] - **9:50** They roll on giant wheels along the site to wherever a piece needs lifting, all while the railway keeps running. - **10:16** **Nick Almeter**, Halmar's project manager, explains: it's a design-build project. Phase One replaced 64 spans (128 bridge units), and Phase One North is replacing 34 spans (68 units). ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t0650.webp]] - **10:56** About 750 trains a day use the corridor, carrying roughly a quarter of a million people. - **11:06** Fred reflects on a 130-year-old piece of steel being "quite unceremoniously" hauled away on a Saturday morning. - **11:38** Sponsor segment (Procore): Halmar uses it for document control, tracking submittals, tagging RFIs to drawings, sharing current drawings with subcontractors, and logging safety and quality items (NCRs, observations, inspections). ### 13:10 The Choreography - **13:12** After each old section comes out, new track goes on top, and then power, communications and signalling are installed so trains can run. - **13:36** Truck deliveries must arrive just in time. Too early or too late snarls local traffic or leaves the gantry waiting and breaks the schedule. - **13:52** Trucks queue down the street to reverse into the site as the gantry lifts old track onto them. - **14:22** Almeter: New York is "a tight, tight place," so weekends are planned in ten-minute intervals, with no room to stage more than a weekend's worth of material. ### 14:39 On Time and Budget - **14:39** Phase One began in late 2023, cost about **$590 million** and took two years; more than 2.5 km of track from East 115th to East 123rd Street was upgraded without shutting the railroad. - **14:59** About $500 million was federal funding; the rest came from the MTA's five-year capital programme (funded by local governments, bonds, taxes, tolls and federal grants). - **15:16** By the end of October 2025 the job was running almost **$100 million under budget** and more than **four years ahead of schedule**, which Fred calls extraordinarily rare for public infrastructure. - **15:45** Phase One North (East 127th to East 132nd Street) started in May 2024, so both phases ran at once. - **16:06** Lessons were reviewed every Tuesday after an outage; output grew from one span on the first weekend to six spans a weekend by the previous summer. ### 16:32 Alternative Methods - **16:33** Cost and time estimates were made before Halmar was appointed, assuming conventional methods such as cranes, which would have meant longer, wider closures. - **17:01** Almeter: without the gantries it would have been slow and intrusive, with closed sidewalks and tandem crane picks, probably limited to one span a weekend rather than six. - **17:23** The design-and-build contract also helped. Instead of several contractors per phase, one firm handles both, which the MTA expected to speed delivery and reduce disruption. - **17:49** Commuters leave Friday night and come back Monday "and they don't know half the structure was missing." ### 18:00 Second Avenue Subway - **18:01** Big New York transport projects don't always go to plan. The **Second Avenue Subway** was first proposed in the 1920s; its first phase finished almost a decade ago, a funding dispute briefly derailed it, and Phase Two has only just started. - **18:27** It's not a direct comparison, since a new tunnelled line is far harder than replacing an existing structure, but the viaduct still involved strict deadlines and precise placement of huge segments. - **18:58** Remaining work (cabling, removing temporary fixtures) is due by September 2027 and is on track to beat that. ### 19:24 Grand Central Train Shed - **19:24** Next up: the **Grand Central train shed**, the structure under Park Avenue from 42nd to 57th Street where incoming trains are sorted onto platforms. ![[images/America-Actually-Built-Something-On-Time-and-On-Budget-t1170.webp]] - **19:37** A New York congressman described it as essentially a bridge holding up cars, the road and Midtown's skyscrapers, slowly deteriorating from age, water and salt. - **20:11** The MTA has signed two public-private partnerships: one with **JPMorgan Chase** (headquartered at 270 Park Avenue) and one with **Vornado Realty Trust** (behind the new tower at 350 Park Avenue). - **20:28** Sector One, around 270 Park, is mostly complete and due to wrap up by the end of 2026. In Sector Two (East 46th to 50th) JPMorgan Chase contributes more than $50 million and runs daily construction; in Sector Three (East 50th to 53rd) Vornado puts in $25 million. ### 20:59 Conclusion - **21:03** Together with the viaduct, this shows a commitment to rebuilding American infrastructure that hasn't always been there. - **21:28** Fred calls the well-choreographed site "literally mesmerising" and says being ahead of schedule and under budget is something everyone in construction, New Yorkers and Americans should be proud of. - **22:12** Sponsor recap (Procore), podcast plug and subscribe call. ## Things Mentioned ### Places & Structures - Park Avenue Viaduct (Harlem rail viaduct, 97th Street to the Harlem River; not the road viaduct near Grand Central) - Park Avenue (formerly Fourth Avenue), Manhattan - Grand Central Terminal (opened 1913) and its predecessor Grand Central Depot (1871) - Grand Central train shed (under Park Avenue, 42nd to 57th Street) - Harlem River Lift Bridge; Harlem; the Bronx - One Vanderbilt; Chrysler Building - 270 Park Avenue (JPMorgan Chase HQ); 350 Park Avenue (Vornado tower) - Second Avenue Subway ### Railways & Organisations - Metro-North Railroad - New York and Harlem Railroad; Hudson River Railroad; New York and New Haven Railroad - Metropolitan Transportation Authority (MTA) and MTA Construction and Development - Halmar International (design-build contractor) - Mi-Jack Products (built the custom gantries) - JPMorgan Chase; Vornado Realty Trust (public-private partners) ### Construction Methods & Concepts - Weekend outages replacing two tracks at a time, with eight prefabricated bridge units on a typical weekend - Deck panels, floor beams and fascia girders - Custom straddle gantries on giant wheels in place of conventional crane tandem picks - Just-in-time truck logistics planned in ten-minute intervals - Design-and-build contracting with a single contractor - Weekly lessons-learned reviews (one span per weekend rising to six) - Public-private partnerships for the train shed rebuild ### Numbers & Timeline - 130+ year-old viaduct, just over a mile long, four tracks - 200,000+ Metro-North weekday passengers; ~750 trains and ~250,000 people a day on the corridor; 400+ trains per weekend day - Phase One: 64 spans / 128 units, late 2023 start, ~$590M, ~$500M federal, 115th to 123rd Street - Phase One North: 34 spans / 68 units, from May 2024, 127th to 132nd Street - 28 outages in 26 months; ~$100M under budget and 4+ years ahead (October 2025) - Remaining work due September 2027; train shed Sector One done by end of 2026; $50M+ (JPMorgan Chase) and $25M (Vornado) ### Media, Sponsors & Links - Procore (sponsor): bit.ly/4dKYwFp - *Mega Builds*, book by Fred Mills - The World's Best Construction Podcast (The B1M) - Get Construction Talking (mental-health initiative) - Full story: theb1m.com/video/park-avenue-viaduct-replacement - Footage credits: MTA, Halmar International, National Museum of American History, Marc A. Hermann, The Dronalist, American International Pictures, Foster + Partners, 20th Century Studios ## Bios - **Fred Mills**: Co-founder and presenter of The B1M, the world's largest construction-focused video channel, and author of *Mega Builds*. He presents this video on site in New York. - **Nick Almeter**: Project manager for Halmar International on the Park Avenue Viaduct replacement. He leads the team behind the gantry-based weekend replacement method and is interviewed throughout. - **Cornelius Vanderbilt**: 19th-century shipping and railroad magnate, among the wealthiest people of his era. He led the merger of the three railroads that became the line's backbone and commissioned the Grand Central Depot in 1871.