The Working Map

Why people at the wildland-urban interface benefit from being able to see the systems they own

In a city, infrastructure belongs to somebody else. Water arrives, a bill follows, and the pipe under the street is the property of an institution that most residents could not name. The arrangement is reliable enough that it never needs a second thought.

At the wildland-urban interface, the arrangement is different and considerably more interesting. A mutual water company is owned by its members, which is to say that it is owned by the people who drink the water, and its board is made up of the neighbors. Many roads are private and are maintained by the households along them. Drainage, vegetation, and access are matters that the people living among them decide together. Residents here are not the customers of a system so much as the joint proprietors of one.

This is an older way of doing things than the municipal model, and it has real advantages. Decisions are made by the people who live with the consequences, on a timescale that suits them, without waiting for a distant agency to schedule a study. What it asks in return is attention, and attention is much easier to give when you can see what you are attending to.

Seeing what you own

Most of a water system is underground. The valves are unmarked, the tank on the ridge carries an installation date that appears in no current document, and the knowledge of which valve actually isolates the upper zone lives in a filing cabinet and in the memory of one or two long-tenured operators. That knowledge is genuinely valuable, and it deserves to be written down while the people who hold it are still around to explain it.

Many small mutual water companies do not have a complete, current map of their own system, and this is not a failing. It is the natural result of many decades of capable incremental work done by people who knew exactly where everything was and had no particular reason to write it down.

The wildland-urban interface adds its own wrinkle. A city can be navigated without a map because the grid is a convention, and conventions travel: addresses increase in a predictable direction, streets connect to other streets, and infrastructure follows the right-of-way. Roads at the interface follow drainages instead of compass headings, they end where the terrain ends them, numbering is irregular, and water may sit in a member's private tank rather than a public main. The physical layout does not explain itself, which means the explanation has to be recorded somewhere, and mostly it has not been.

What we are building

We are assembling a detailed, layered map of one mutual water company service area and the ground adjacent to it, using open-source tools so that the method can be copied by other communities rather than purchased from anyone.

The first layer is the water system itself. We are recording assets by type, along with coordinates, elevation, capacity and diameter, material, installation date, and manufacturer wherever those were noted. This information comes first from the water company's own files, then from the operators who carry what the files never captured, and then from the systems next door.

The second layer is private infrastructure. Member-owned tanks, wells, pumps, generators, and pools appear on no utility's books, and together they represent a substantial amount of capacity that the community already possesses. Putting them on a shared map turns scattered individual holdings into a resource the whole membership can reason about. Gathering that layer also gives members something concrete to contribute, which is a good way to build a map that people feel some ownership of.

The third layer is the ground and the ways across it. This includes topography, the road network as it actually exists rather than as it was published, and the routes visible in satellite imagery that never made it onto an official map, such as fire roads, easements, utility corridors, and ranch tracks. We are adding the electrical distribution overlay and keeping a running list of the gaps we know we have not filled yet.

What becomes possible

A community that can see its own system can plan. It can schedule replacement against the actual age and condition of its assets rather than against whatever happened to fail most recently. It can make the case for a rate adjustment to its own members with evidence in hand. It can find a main break quickly instead of by process of elimination. It can bring a new operator up to speed with something better than a walking tour, and it can welcome new members into an understanding of the place that used to take a decade to acquire.

Good documentation also opens doors outward. Grant programs and state funding sources generally want to see an asset inventory before they will consider a capital request, and a community that already has one is in a much better position than a community that has to build one under deadline. The same is true of insurance, of engineering review, and of any conversation with the county.

Perhaps most usefully, a shared map makes it possible to work with the neighbors. Water crosses service area boundaries, and so do the practical opportunities: interties that would give two small systems mutual backup, a shared operator or shared equipment, a joint purchase that neither could justify alone, a well or a storage site that serves more than one membership. Those conversations are difficult to start in the abstract and quite natural to start over a map that shows both systems at once.

The point of all this is that the map should be a tool in regular use rather than a document that gets filed. If it also proves valuable during an outage, a storm, a debris flow, or a fire, that is worth a great deal, and it is the same information either way. The version we keep in the vehicle is printed and laminated, drawn to standard symbology, and legible to someone who has never been here.

The underlying idea

Elinor Ostrom's study of commonly held resources began, as it happens, with groundwater basins in Southern California. In the Raymond Basin case she later wrote about, users had competing claims and no agreed picture of the resource until a court ordered an independent study. Once that study existed and everyone could see the same numbers, thirty of the thirty-two users came to an agreement among themselves.

What unlocked the cooperation was not an authority imposing a rule. It was credible shared information that every party could examine. A mutual water company is a commons in the strict sense, and the map is its shared picture.

This project and the Hydronomics dashboard make the same argument along different axes. One makes many small systems comparable to one another over time, and the other makes a single system visible to the people who own it. Both begin from the observation that the information already exists, and that a community which can see clearly is in a much better position to decide well.

Front line for fire, fire insurer.