Mapping the Culvert Cats
A storm drain surveyor documents the predators hunting beneath Los Angeles

About this book:

Beneath the palm trees and freeways of Los Angeles runs a second city—over eighteen hundred miles of concrete storm drains built to carry the city’s water to the sea. Senior Hydrological Surveyor Miller knows every manhole and box culvert, but nothing in his municipal training prepares him for Box Culvert 7-A: a clump of tawny hair snagged in a concrete joint, deep scratches scored into the pipe wall, and a four-inch paw print pressed into wet silt. No dog, no rat, no alley cat could leave such a mark.

As Miller follows the evidence into unmapped laterals and outfall tunnels, he comes face-to-face with a creature that defies every guidebook: slate-grey, low-slung, perfectly adapted to the dark, and communicating with a mechanical two-tone click that sounds like stone against concrete. It is not a mountain lion, not a bobcat, not a lost pet. It is something the city itself has engineered—an apex predator living in the pipes, hunting beneath the streets while millions of Angelenos drive above, oblivious.

Mapping the Culvert Cats is an atmospheric plunge into the hidden underside of Los Angeles, where concrete cracks, forgotten pipes breathe, and something wild has reclaimed the void. Part urban noir, part naturalist’s thriller, it will change the way you look at every storm drain you pass.