--- title: albuquerque flooding was the arroyo canonical_url: https://ensurance.app/guide/albuquerque-flooding-was-the-arroyo markdown_url: https://ensurance.app/guide/albuquerque-flooding-was-the-arroyo.md subtitle: the street closed at paseo and universe. the river was a different path. category: ecosystem-services --- # albuquerque flooding was the arroyo *the street closed at paseo and universe. the river was a different path.* Albuquerque flooding in late September 2026 was arroyo and street water. On Tuesday, September 29, Paseo del Norte and Universe Boulevard in Ventana Ranch closed around 3:30 p.m. and reopened before 4. In Rio Rancho, dirt roads washed out. The Rio Grande rose earlier, around September 17–18, by a different path, and was not expected to leave its channel. If you drove the west mesa that week, you know how it went. Two weeks of rain, then ground that never got the chance to dry. At some point the water stopped soaking in and started moving: across pavement, into the ruts of dirt roads, toward whatever low ground the street grid offered. Paseo del Norte shows up in both halves of this story. The flow reading near Paseo del Norte is where the Rio Grande went from almost nothing to a real river for a few days. The intersection at Paseo del Norte and Universe is where street water closed the road. Same road name, two different waters, two different storms. :::johnson **the street water and the river took two paths.** On September 29 the arroyos and the street grid carried the storm across the west mesa. Earlier in the month, the Rio Grande carried a short rain pulse through town and was not expected to leave its channel. Keep the two apart and the question of who carries what gets much simpler. [how the rio grande came back →](/guide/the-rio-grande-came-back?from=guide) ::: ## what caused albuquerque flooding The late-September storm was late monsoon moisture plus the remnants of Hurricane Polo and Tropical Storm Odalys, arriving after about two weeks of rain. It was not a hurricane landfall in New Mexico. National Weather Service meteorologist David Craft told the Albuquerque Journal that the highest early-Tuesday concern included Rio Rancho, Santa Fe, and Valencia County, and that low-water crossings and burn scars were vulnerable. The rain numbers explain the rest. The Albuquerque Sunport recorded **1.18 inches** Tuesday through Wednesday, which pushed September 2026 to **4.49 inches**, passing September 2013's 3.97 inches as the rainiest September on record at that station. Rio Rancho logged **3.32 inches** in the same storm, and some metro spots took more than 2 inches in 24 hours. The record matters less than the order it came in. The last inches fell on soil that had been wet for two weeks. Saturated ground does not absorb; it sheds. On a mesa, shed water finds an **arroyo**, the dry wash that carries runoff only when it rains ([what an arroyo actually is](/guide/what-an-arroyo-actually-is?from=guide)). Where there is no arroyo, it finds a street. ## two paths, two storms | | the street path | the river path | |---|---|---| | When | September 29–30 | About September 17–18 | | What fed it | Late monsoon, Polo remnants, and Tropical Storm Odalys on saturated ground | Runoff from the Jemez Mountains, Galisteo Arroyo, and the North Diversion Channel | | Where the water went | West-mesa streets, Rio Rancho dirt roads, arroyos | The Rio Grande main channel, Bernalillo toward Elephant Butte | | What it touched | A short closure at Paseo del Norte and Universe; washed-out dirt roads; one Rio Rancho home that took water inside | Irrigation works that took stormwater; the river itself | | The number | 4.49 inches of September rain at the Sunport, a record | 0.47 cfs to 93 cfs near Paseo del Norte | | What it was not | A river flood | A levee failure, or the end of the drought | That is the contrast worth holding. The record rain total sits in the street column, and the river's 93 cfs is a small number for a river. The street path is the one that reached people's driveways. ## the street path: paseo del norte, universe, and huron road KOB reported that Paseo del Norte Blvd NW and Universe Blvd NW, in Ventana Ranch on the northwest side, closed about 3:30 p.m. Tuesday and reopened before 4. KOAT described the intersection as covered in several inches of rain, and by its 6:24 p.m. update said no metro roads were closed. Both accounts are the same intersection at different hours. The reports describe rain on the intersection, not where the water came from. If an arroyo fed that corner, no report we found named it. It is tempting to call it the North Diversion Channel, because that is the channel most people in Albuquerque can name. It was not. The North Diversion Channel drains the northeast side. Across the county line, Rio Rancho had the longer week. The city has **116 miles** of unpaved roads. That is the inventory, not a damage tally. On Huron Road SE a car got stuck, and a hole along a dirt road near Huron narrowed the lane and exposed pipes. KOAT reported erosion near Rio Rancho Middle School. Neighborhoods shoveled mud, and one resident said the inside of a home started to flood. The city's explanation was plain. After two weeks of rain, the ground was not drying. Assessment and repair are expected to continue for several months. The city said it cannot control where heavy rain takes stormwater, and at Huron it is working from the storm-repair list and monitoring. If you live on one of those roads, that repair list is your next step, and the grader is still the first fix. Nothing in this post replaces it. ## the river path: a short pulse, earlier The river's moment came first. Jason Casuga, CEO and chief engineer of the Middle Rio Grande Conservancy District (MRGCD), told KOAT in a story updated September 18 that runoff from the Jemez Mountains, Galisteo Arroyo, and Albuquerque's North Diversion Channel had reconnected the Rio Grande from Bernalillo to Elephant Butte. Near Paseo del Norte, flow went from **0.47 cfs** (cubic feet per second) Thursday afternoon to **93 cfs** Friday morning. Casuga said the surge through Albuquerque could reach about 2,100 cfs. That was a described possibility, not a gage reading. He said it was not expected to overflow the banks or threaten Albuquerque's levees or neighborhoods. For a reach running at less than half a cubic foot per second, 93 is a river again. It is still not a flood, and Casuga was direct about the drought: "The scale of this drought is much larger than any small burst of rain events." What the pulse meant for the river is the subject of [the rio grande came back](/guide/the-rio-grande-came-back?from=guide). The same mid-month runoff also landed in the district's irrigation canals, which were built to deliver water, not to carry storms. That story belongs to [who maintains an irrigation canal](/guide/who-maintains-an-irrigation-canal?from=guide). ## who already carries the water Albuquerque does not have to invent a stormwater system. It has one. Two arroyo authorities and a city streets department were doing this work before the storm and will be doing it after. | Who | What they run | What September showed | |---|---|---| | Albuquerque Metropolitan Arroyo Flood Control Authority (AMAFCA) | The North and South Diversion Channels, built as Army Corps projects with AMAFCA as local sponsor | The North Diversion Channel was named as a river inflow in mid-September. No sourced report that either channel overtopped | | Southern Sandoval County Arroyo Flood Control Authority (SSCAFCA) | Arroyos and dams for Rio Rancho, Corrales, the Town of Bernalillo, and southern Sandoval County | No sourced dam failure. The dirt roads are not SSCAFCA's | | City of Rio Rancho | Its own streets, including 116 miles of unpaved road | A storm-repair list and several months of work | | State of New Mexico | Emergency response | Executive Orders 2026-073 through 2026-077, up to $3.75 million for response such as shelter, food, and transport. Not a repair estimate | The **North Diversion Channel** is concrete-lined, drains northeast Albuquerque, and has a design capacity of **44,000 cfs** at its outlet. That is what it was built to carry, not what it carried in September. The South Diversion Channel, rock and concrete, intercepts southeast Albuquerque and the Tijeras Arroyo. Both move floodwater to the river. Concrete channels are the gray half of [flood control](/guide/how-to-slow-flash-floods-nature-based-solutions?from=guide), and no report we found says these failed. The places that made the news, a northwest intersection and a set of Rio Rancho dirt roads, are where storm water met pavement and dirt, not concrete. ## the arroyo above the concrete Every diversion channel is the bottom of a longer system. Above it are mesa catchments of shrubland and desert soil, and the arroyo beds and banks that decide whether rain soaks in, slows down, or runs. When that ground has had two weeks of rain, more of it runs. A healthy arroyo on saturated ground can still slow water, spread it, and hold its banks and nearby road cuts, but it does not absorb a record September. That upper part is alive: plants, soil, and the wash's own bed. Accounting frameworks call what it does **risk resilience** and **erosion control**. The arroyo, the irrigation ditch, and the Rio Grande channel exist whether or not anyone buys a certificate. In September 2026 a rain pulse briefly reconnected the river, and less than two weeks later storm water ran onto streets and dirt roads. What [*ensurance*](https://ensurance.app/?from=guide) funds is the living channel that should carry that water. It is not the emergency order, and it is not a fix for the city's drinking water, which no report said failed. In practice, that work sits under a live onchain account for the river, the agent [rio-grande-river.basin](https://ensurance.app/rio-grande-river.basin?from=guide), which can hold funds and issue certificates tied to named natural assets. An `arroyo channel` line under that agent is in ideation. Anyone can [suggest or co-create it](/specific/create?mode=suggest&agent=rio-grande-river.basin&name=arroyo%20channel&from=guide), and a person reviews the suggestion before anything becomes a certificate. Each reader keeps their own tool. The city's grader still clears Huron Road. AMAFCA's North Diversion Channel stays the channel; a certificate does not replace it. The second layer is the living arroyo above the concrete, funded so the channel is not the only thing holding the storm. ## frequently asked questions ### what caused albuquerque flooding in september 2026? Arroyo and street runoff on saturated ground, during the September 29–30 storm. Late monsoon moisture plus the remnants of Hurricane Polo and Tropical Storm Odalys fell after about two weeks of rain, closing Paseo del Norte and Universe briefly and washing out dirt roads in Rio Rancho. ### did the rio grande flood albuquerque? No report we found says it did. During the mid-September pulse, MRGCD's Jason Casuga said the rise was not expected to overflow the banks or threaten Albuquerque's levees or neighborhoods. A public gage page showed a stage of 2.55 feet at 4:15 p.m. on September 28, against a flood stage of 8 feet, but that reading came before the September 29–30 storm and says nothing about those two days. ### what is the north diversion channel? A concrete-lined channel that carries floodwater from northeast Albuquerque to the Rio Grande. AMAFCA is its local sponsor. Its design capacity at the outlet is 44,000 cfs. In mid-September it was one of three named inflows that reconnected the river. It is not the drainage that closed Paseo del Norte at Universe. ## read next The street water had its two days. The river had a few of its own, earlier, and the drought underneath both did not move: [the rio grande came back](/guide/the-rio-grande-came-back?from=guide). Or go straight to the river's agent, [rio-grande-river.basin](https://ensurance.app/rio-grande-river.basin?from=guide). ## the series 1. [what an arroyo actually is](/guide/what-an-arroyo-actually-is?from=guide) 2. albuquerque flooding was the arroyo (this post) 3. [the rio grande came back](/guide/the-rio-grande-came-back?from=guide) 4. [santa fe flooded from the arroyo](/guide/santa-fe-flooded-from-the-arroyo?from=guide) 5. [who maintains an irrigation canal](/guide/who-maintains-an-irrigation-canal?from=guide) ## sources [KOAT, Sep 18, 2026 (Aliyah Chavez)](https://www.koat.com/article/recent-rain-restores-rio-grande-flows-but-officials-say-drought-remains/73796076) — Jason Casuga on the Rio Grande reconnect from Bernalillo to Elephant Butte, the three inflows, 0.47 to 93 cfs near Paseo del Norte, the possible 2,100 cfs surge, levees not expected to be threatened, the drought quote, MRGCD canal damage [KOB, Hurricane Polo remnants](https://www.kob.com/news/top-news/remnants-of-hurricane-polo-bring-widespread-rain-and-flooding-across-new-mexico/) — Paseo del Norte and Universe closure and reopening times, 2+ inches in some metro spots, the hole near Huron Road [KOAT, Sep 29, 2026 (Simone Garber)](https://www.koat.com/article/heavy-rains-cause-erosion-and-flooding-across-new-mexico/73949600) — several inches at Paseo and Universe, erosion near Rio Rancho Middle School, no metro closures by the evening update [KOB, Sep 30, 2026 (Jonathan Fjeld)](https://www.kob.com/news/top-news/albuquerque-breaks-september-rain-record-santa-fe-leads-recent-rainfall-in-nm/) — Sunport 1.18 inches, September total 4.49 inches versus 3.97 inches in 2013, Rio Rancho 3.32 inches [KOB, Rio Rancho dirt roads](https://www.kob.com/new-mexico/dirt-roads-in-rio-rancho-destroyed-by-flooding/) — 116 miles of unpaved roads, Huron Road SE, saturated ground, several months of repair, the city's statement on stormwater [1 News Media / KRQE, Sep 30, 2026](https://1newsmedia.com/rio-rancho-neighborhoods-clean-up-after-flooding-caused-damage-to-homes-and-roads/) — Rio Rancho mud cleanup and a home interior that started to flood [Albuquerque Journal](https://www.abqjournal.com/news/flood-watches-expand-as-rains-drench-new-mexico/3131381) — NWS meteorologist David Craft on storm sources, areas of concern, low-water crossings [AMAFCA facilities](https://amafca.org/amafca-facilities/) — North and South Diversion Channels, local sponsorship, 44,000 cfs design capacity at the North channel outlet [SSCAFCA, about](https://www.sscafca.org/about-us/) — jurisdiction and 1990 statutory basis [Office of the Governor, Sep 30, 2026](https://www.governor.state.nm.us/newsroom/acting-gov-morales-signs-executive-orders-for-flood-response-2113) — Acting Governor Howie Morales, Executive Orders 2026-073 through 2026-077, up to $3.75 million for response [WeatherForYou, Rio Grande at Albuquerque](https://www.weatherforyou.com/rivers-lakes/moriarty-nm/abqn5) — stage 2.55 feet at 4:15 p.m. MDT Sep 28, 2026, flood stage 8 feet