The Docket's Archive section does not, as a rule, conduct interviews with the dead. But the Tibbetts Brook story — a stream buried in 1912 and now being exhumed at a cost of $133 million — demands we understand the logic of the people who put it underground. What follows is a conversation with Phineas Culvert, assistant engineer in the Bronx division of New York City's Department of Public Works, reconstructed from period documents, professional journals, and the institutional memory of an era that believed drainage was salvation. Mr. Culvert is, in the strictest sense, not real. His reasoning is.

We meet him, or imagine we do, in the spring of 1911, at the edge of Van Cortlandt Lake. A Parks Department crew has just finished dredging the lakebed and installing a new dam. The brick-lined drain pipe that will carry the brook's water south into the Broadway sewer is under construction. Culvert is 31, lives in Kingsbridge with his wife and infant daughter, and has been on this project for two years.

You've been working on the Tibbetts Brook drainage for some time now. What does this area look like today, before the work is finished?

Standing water. That's what you see first. Standing water and cattails and, if you're downwind, a smell that my wife describes as "the reason we don't open the east windows."

I'll be direct with you. I have a daughter who is nine months old. She lives four blocks from here. The marshland between the lake and the rail line is a breeding ground. Ross proved it fourteen years ago. The mosquito carries the parasite. The parasite needs standing water. The standing water is right there.¹

And it wasn't always this bad. The railroad came through in the seventies, the Putnam line, and when they graded the valley they disrupted the brook's natural drainage. Created new marshes where there hadn't been marshes before.² So we're not burying some pristine waterway. We're cleaning up a mess the railroad made thirty years ago and nobody bothered to fix.

The original plans called for a cast-iron pipe. You're building it in brick. What changed?

Budget.

That's it?

That's always it. The Broadway sewer was finished four years ago. That's the spine, the main line we're connecting to.³ Getting that built took years of advocacy. Now we need the drain pipe from the lake to the sewer, and the Board of Estimate wants to know why we can't just dig a ditch. A ditch. As though we're laying irrigation for a potato farm in Suffolk County.

Brick will hold. Brick is what we have money for. Brick is what we're building.

Some residents have complained about the project. They say the marshland has its own value. Waterfowl, fishing, the character of the area.

I grew up near the Harlem River. I remember what it was like before the intercepting sewers went in. There's a romance to water. I feel it myself, standing at the lake on a clear morning.

But romance doesn't prevent typhoid. And it doesn't house families.

Do you know what the Bronx population was ten years ago? Two hundred thousand. Do you know what it is now? More than four hundred thousand.⁴ These are families coming up from the tenements in Manhattan. The IRT opened in 1904, and suddenly a man can live in Kingsbridge and work downtown for a nickel.⁵ They need homes. They need streets. They need sewers beneath those streets. And right now, between the lake and Broadway, there is a swamp that breeds disease and prevents construction.

The waterfowl will find other water. They always do.

You mention Colonel Waring's work often. He died before you entered the profession. What does he mean to you?

Waring drained the wetlands of Central Park.⁶ He cleaned the streets of Manhattan when everyone said it couldn't be done. He proved that a city could be made sanitary through engineering. Not through prayer, not through moving to the countryside, but through systems. Pipes. Grades. Flow rates.

I keep a photograph of his White Wings pinned above my drafting table. The street sweepers, in their white uniforms. My wife thinks it's peculiar. She says most men pin up pictures of racehorses. But those men in white, cleaning the streets of New York? That's what this profession is. We make cities livable. The brook is part of that work.

The Tenement Act of 1901 required water closets in every apartment. Has that changed what you do?

Enormously. Every new building in the Bronx now has indoor plumbing. Every water closet produces waste. That waste must go somewhere. The combined sewer system is the somewhere.⁷

I realize this sounds indelicate, but the mathematics are straightforward. Freshwater going into a sewer pipe. It doesn't belong there, and yet that's where it must go, because the alternative is leaving the marshland open, the mosquitoes breeding, and the avenue unbuilt.

Do you ever wonder if you're wrong? If burying the brook will create problems you can't foresee?

[long pause]

I wonder about everything. I wondered whether brick would hold as well as cast iron. I wondered whether the lakebed dredging would destabilize the new dam. I wonder whether the sewer capacity south of 230th Street is truly adequate for what's coming.

But whether the principle is wrong? Whether a city should drain its wetlands and pipe its streams and build over the result? No. Because I have seen the alternative. The Collect Pond. You know the history? They filled it in 1811, badly, and the Five Points sat on top of it for fifty years, sinking into its own sewage.⁸ That is what happens when you leave water where a city wants to be and hope for the best.

We are not hoping. We are building a drain. It will carry the water where it needs to go. The avenue will be laid. The armory is already under construction.⁹ Families will live here. My daughter will grow up here.

The pipe is brick. It will hold.

The pipe held for 114 years. The consequences of Phineas Culvert's reasonable decision, and what New York is now spending $133 million to undo, are the subject of this week's Archive feature.

Footnotes

1. Ronald Ross proved mosquito transmission of malaria in 1897; his book The Prevention of Malaria was published in 1910. https://en.wikipedia.org/wiki/Malaria ↩

2. The New York and Putnam Railroad, built 1872–1880, disrupted Tibbetts Brook's drainage and created new marshlands. https://en.wikipedia.org/wiki/Tibbetts_Brook ↩

3. The Broadway Outlet Sewer was completed in 1907, providing the trunk line for the brook's diversion. https://en.wikipedia.org/wiki/Tibbetts_Brook ↩

4. Bronx population grew from approximately 200,000 in 1900 to 430,980 by 1910. https://en.wikipedia.org/wiki/The_Bronx ↩

5. The IRT subway line opened to the Bronx in 1904, triggering rapid residential development. https://cooperatornews.com/article/the-new-bronx ↩

6. George Waring served as drainage engineer for Central Park's construction in 1857, draining wetlands across the site. https://culturenow.org/people/colonel-george-e-waring-jr ↩

7. The Tenement Act of 1901 mandated indoor water closets, dramatically increasing demand on the combined sewer system. https://sanitary.nyc/the-history-of-plumbing-in-new-york-city/ ↩

8. The Collect Pond, filled in 1811, became the foundation of the Five Points, one of the most notoriously unsanitary neighborhoods in American history. https://historynet.com/sanitation-innovation/ ↩

9. The Kingsbridge Armory was constructed between 1910 and 1917 on land adjacent to the former marshland. https://grokipedia.com/page/Kingsbridge,_Bronx ↩