Colorado already funds wildlife crossings. It funds them as crashes.
The Colorado Department of Transportation reports about 4,000 wildlife-involved crashes a year on average, and says the real figure is probably closer to 14,100 because most collisions never make it into a report. Nationally, FHWA-derived figures put the human toll at roughly 200 deaths and 26,000 injuries a year from this crash type.
That money moves every year. Drivers pay it in deductibles, insurers pay it in claims, the state pays it in trooper hours and carcass removal, and some of it gets paid in ambulances. None of it buys a structure.
the benefits of wildlife corridors, in budget terms
The benefits of wildlife corridors usually get argued in ecological language: connectivity, genetic exchange, climate-driven range shift. All true, and all of it loses in a budget hearing to a bridge deck that needs repaving.
Here is the version that survives the hearing. The benefits of wildlife corridors, and of the crossings that serve them, land on four ledgers at once:
| benefit | who books it | already funded? |
|---|---|---|
| crashes avoided | drivers, insurers, state patrol, hospitals | yes — as losses |
| herd persistence | state wildlife agency, license buyers, outfitters | partly |
| travel-time reliability | the DOT and every freight shipper on the corridor | yes — as delay |
| genetic exchange between populations | no one | no |
Three of those four already have someone paying for the failure. The fourth has no payor at all, which is why it is the first thing cut and the last thing measured.
CDOT put a number on the third one during the I-25 South Gap work: at least 10% of traffic delays in that corridor were people hitting wildlife. That is a reliability problem, not a nature problem, and it shows up on a freight schedule.
who actually writes the check
Seven payors show up on real projects. Each funds a different slice, and the slices do not overlap the way anyone assumes.
| payor | what it actually buys | what it does not cover |
|---|---|---|
| state DOT capital | the structure itself — overpass, underpass, culvert retrofit, fencing, escape ramps, wildlife guards. Usually cheapest as an add-on to a larger highway project already in the pipeline | land on either side; habitat condition in year 15 |
| federal Wildlife Crossings Pilot Program | competitive IIJA grants that states win by pairing them with non-federal dollars. $350 million in Federal-aid contract authority authorized across FY2022–FY2026, with at least 60% required to go to rural projects | it is contract authority subject to the annual obligation limitation, not cash sitting in a state account. Awards have been competitive and partial — treat the authorization as a ceiling, not cash in a state account |
| state wildlife fund | habitat, herds, and the land animals arrive on. In Colorado a share of the new registration fee is routed to the Wildlife Cash Fund specifically to conserve habitat on either side of crossings | highway structural engineering |
| optional registration fee | Colorado's SB 26-141, signed in May 2026: an optional $5 collision prevention fee at vehicle registration starting January 1, 2027, declinable with no effect on your registration. Built explicitly to leverage federal matching dollars | it is voluntary, so the revenue line is a forecast, not a guarantee |
| county and land trust | right-of-way, easements, and the parcels that keep the approach from being subdivided | the bridge |
| philanthropy | the gap, and the ambition. The Wallis Annenberg Wildlife Crossing's roughly $114 million came from state transportation dollars plus more than $30 million in private donations | recurring maintenance, unless someone endows it separately |
| insurers | the crash. Claims, medical, comprehensive and collision loss costs — every year, in every state | any part of the crossing. This is the one payor already spending at scale with nothing to show for it but paid losses |
That last row is the one worth sitting with. Insurers absorb a large share of wildlife-vehicle collision costs every year and hold no position whatsoever in the thing that would reduce them. Senator Dylan Roberts, who sponsored the Colorado fee, made the point plainly: fewer wrecks mean fewer claims, which brings insurance costs down for everybody. That is not a nature policy. It is a loss-ratio argument that happens to be true.
the arithmetic that makes an engineer nod
A Washington State University analysis published in Transportation Research Record looked at 13 crossing structures in Washington against WSDOT crash data from 2011 to 2020, using a difference-in-differences design with control stretches 60 to 70 miles away. It found one to three fewer wildlife-vehicle collisions per mile per year within 10 miles of a structure, worth $235,000 to $443,000 per structure per year in 2021 dollars.
Read the caveats before you put that in a memo. It is 13 structures in one state, the benefit estimate is explicitly back-of-the-envelope, and the reductions were more consistent for wildlife bridges than for culverts. Not every structure performs like the average.
Now set it against cost. In that same accounting, an underpass runs roughly $500,000 to $2.7 million and an overpass roughly $2.7 million to $6.2 million. Against underpass costs of $500,000 to $2.7 million — before fencing, which the study's Wyoming example priced at roughly a third again — that benefit range is favorable. Nobody should read it as a payback schedule. Sugiarto's own decomposition is avoided collisions plus fatality savings, using Huijser et al.'s per-deer-strike cost, not a WSDOT unit price.
A crossing is one of the few pieces of transportation infrastructure whose benefit case can be made entirely from crash data, before anyone mentions an animal.
fencing is the part that gets cut
The ~90% collision reductions CDOT reports are not from structures. They are from structures paired with long runs of exclusion fencing, escape ramps, and wildlife guards that funnel animals to the opening.
The Colorado Highway 9 project, completed in 2016, is the clean example: two overpasses, five underpasses, more than 60 one-way escape ramps, 29 wildlife guards, and nine pedestrian walk-throughs across roughly 10 miles between Green Mountain Reservoir and Kremmling. Result: about a 90% drop in wildlife-vehicle crashes and more than 112,000 recorded mule deer crossings of those seven structures.
Fencing is also the cheapest thing on the drawing to value-engineer out, and the thing that needs a maintenance budget in year seven when a tree drops on it. A crossing whose fence has a gap is a suggestion.
the $114 million line and the $500,000 line
The Wallis Annenberg Wildlife Crossing over US-101 at Agoura Hills is about 210 feet long and 165 feet wide at its widest, cost roughly $114 million, and will be dedicated on December 2, 2026 after more than three decades of work. It reconnects the Simi Hills and the Santa Monica Mountains for a mountain lion population that biologists have tracked as genetically isolated.
It is not a payback-schedule project, and pretending otherwise does it no favors. It buys something the crash ledger cannot price: gene flow into a walled-in population. Judge it on that.
The contrast matters for everyone else's capital plan. At the other end of the same catalog, an underpass starts around $500,000. Both are wildlife crossings. Only one becomes a news story, and the unglamorous end is where most of the avoided-crash math actually lives. The I-25 Greenland overpass in Douglas County — completed in December 2025, 200 by 209 feet, spanning six lanes and connecting 39,000 acres — worked because it closed a 3.7-mile gap in a system of underpasses and fencing that was already there. Before that system, drivers in the corridor averaged about one wildlife-vehicle crash per day in peak migration seasons.
Also worth naming honestly: the Wildlife Crossing Fund's $500 million target for private philanthropy across North America is an aim, announced alongside the Annenberg dedication. It is a fundraising goal, not a balance. Treat it as intent, and plan your project as if it will not arrive.
every payor on that list funds an event
Look back at the table. DOT capital funds a construction season. The federal pilot funds a grant cycle — and its authorization table runs FY2022 through FY2026, which means anything after depends on the next surface transportation bill rather than on the line you saw in a 2022 press release. Philanthropy funds the build. Insurers fund claims after the fact.
Nobody's line item is the route still works in year 20.
That is the structural gap, and it is not a character flaw in any of these institutions. It is what happens when the thing being funded is a condition and every available instrument is an event. The Annenberg partners saw it clearly enough to organize a separate arrangement — the National Wildlife Federation and the Wildlife Crossing Fund teaming up for long-term research, habitat restoration, and maintenance after construction ends. That had to be assembled on purpose, after the fact, by people who noticed the hole. Most projects do not get that.
It is the same question asked of wetlands, floodplains, and urban tree canopy — we covered that version here. Back to crossings.
what ensurance adds, honestly
The whole point of ensurance is to fund the condition rather than the event: a named route, held as a present-tense asset, with proceeds routed to the place instead of to a grant cycle.
In plain terms, two instruments. A certificate funds one named asset directly. A coin funds protection across the protocol indirectly, through trading. Both are held by an agent — an onchain account that represents a place, a group of people, or a purpose, and routes what it receives.
Our stage, stated plainly: wildlife-corridor.syndicate is live and has a certificate with about 3,300 minted. wildlife-crossing.syndicate is a live agent account for structure funding and is newer — no certificate of its own yet. Volumes are small. This is not a substitute for DOT capital, and anyone telling you a token builds a $6 million overpass is selling you something.
What it can be is the recurring payor nobody else is: the line that keeps the fence maintained, the vegetation established, and the parcels on both approaches from being subdivided the year after the ribbon.
what to do with this
If you are a DOT, county, or state wildlife agency: the strongest version of your budget request is the crash ledger you already own, paired with the structure-plus-fencing evidence, not an appeal to connectivity. Bring both. → governments
If you invest in infrastructure: crossings are a small, durable, under-modeled asset class attached to corridors that already have a measurable loss stream. The interesting position is not the structure — it is the maintained route. → infrastructure investors
If you underwrite auto: you are already the payor. The only question is whether you keep paying the loss or take a position in the thing that reduces it.
If you have a specific corridor in mind: tell us where it is. Route, road, and who is already at the table is enough to start.
Start here: wildlife-crossing.syndicate.