After a run of summer storms, NYC Parks had more wood chips than it could use. Enormous piles of them along Prospect Park’s interior roads, compacting and degrading where they sat.

Two miles east, in East Flatbush, street trees were dying of heat and drought stress in bare, compacted pits.

I had been moving material between those two facts by bicycle. Three five-gallon buckets at a time, out of the park and into tree beds near my house. Fifteen gallons a trip, which is enough for two tree pits. It worked, and it was comically inefficient, and after enough weekends of it the actual shape of the problem became hard to ignore: the surplus was real, the shortage was real, both were visible to anyone who cared to look, and there was no mechanism between them. Not a funding gap. Not a policy gap. No connective tissue.

The Brooklyn Mulch Pipeline is that same bicycle route with a vehicle and a volunteer crew instead of a bike rack, and one design constraint I held to severely: no new infrastructure. No depot, no processing, no storage, no second handling of material. A crew loads from an existing pile, follows a pre-mapped route, clears and aerates and generously mulches each pit, and the vehicle empties completely before it returns. Then it does it again when new piles appear.

Every clause in that sentence is a decision that cost something. No depot means no lease, no permit, no insurance, and no fixed cost that outlives volunteer enthusiasm -- which it will, because volunteer enthusiasm always does. Empty-before-return means no partial loads and nothing to store. Pre-mapped routes mean a volunteer who has never done this can be useful inside ten minutes rather than shadowing someone for an hour.

A neglected tree pit takes roughly eight gallons of chips. From there the arithmetic is the whole pitch:

Figures assume fresh chips at roughly eight gallons per pit and a moderately loaded vehicle. Actual yields vary with pit condition, chip moisture, and crew size.

The station wagon line is the pilot. One vehicle, one driver, a few volunteers, a single morning, twenty-five trees.

I had better numbers available and chose not to lead with them. A coalition assembles around a figure it believes. Publish the pickup-truck number and every conversation becomes an argument about whether you can really get a pickup truck. Publish the station wagon and the conversation is about which Saturday.

Three parties had to agree, and the ask to each was deliberately small. NYC Parks Stewardship produces and stockpiles the surplus, so the ask was authorization and guidance on drawing from the existing woodchip supply. Big Reuse coordinates community street tree care across Brooklyn, so the ask was promotion through their volunteer network -- and they endorsed it. Council District 45, which covers the pilot neighborhood, was asked for promotion support and whatever distribution resources might already exist.

Notice what is absent from all three. No equipment. No staff time. No budget. The ask is a green light: an agreement in principle that this should happen, plus a short call to settle scope, timing, and route.

That is the single most important decision in the project, and it is not really about mulch. An ask that requires a budget line enters a queue and waits for a fiscal cycle. An ask that requires only permission can be answered inside one meeting by someone who already has the authority to answer it. The window here was short in both directions -- chip piles compact within weeks, street trees peak-stress through July and August -- and when the window is short, the structure of the ask determines whether the thing happens at all.

It scales without new infrastructure in three directions. More runs on the same vehicle at a weekend cadence through the heat season. More capacity by swapping the wagon for a pickup, which changes the output and nothing else about the method. More neighborhoods, because any park generating a chip surplus can anchor a route into the blocks around it. Prospect Park is the first one, not the only possible one.

This work is unpaid, and it is on this site deliberately. Civic coordination is where operational discipline shows up with no budget to hide behind: no procurement process to lean on, no contract to enforce, no vendor to escalate to. If the coalition does not assemble, nothing moves, and every constraint has to be designed around rather than funded away.

Which is the same job as a warehouse integration or a rooftop array, minus the money that usually disguises it.

Trevor MacDermid is founder of the Brooklyn Mulch Pipeline, a Brooklyn Botanic Garden certified Citizen Tree Pruner, and a resident of East Flatbush’s four-time Greenest Block in Brooklyn, where he organizes neighborhood greening and block association projects.