How Fragmented Governance Boosts Flood Risk

4/2/2026 – Across the U.S., fragmented governance increases flood risk by creating a patchwork quilt of local interests that makes regulation, compliance and enforcement difficult. 

One might think that our multi-level system of government – federal, state, county, city, improvement districts, etc. – creates defense in depth. In reality, each governmental entity plays by its own rules and is responsible to different groups of voters with different priorities and interests. 

The problem is especially visible in large metro regions that involve numerous cities and counties with upstream/downstream conflicts of interest. Watersheds fragment into jurisdictional silos.

People downstream may experience flooding issues decades before upstream residents. And those upstream residents have no incentive to increase their taxes to pay for downstream mitigation. 

Fragmented governance, therefore pits groups against each other as development spreads outward.

It also creates an accountability gap – “Not our job!”

And regulatory inconsistency (different rules for detention, rainfall and fill) make it almost impossible to measure the cumulative impact of hydrological changes throughout the watershed.

In any given river basin, we may all be part of the solution. But we don’t all feel the problem. At least, not yet.

Denver’s South Platte Basin

Fragmented governance in the Denver metro—especially in the South Platte River basin—has been a persistent, structural driver of flood risk. A patchwork of cities, counties, special districts, and state/federal agencies manage the basin. The result: coordination gaps that translate directly into flood risk.

Alliance for the Great Lakes produced a fascinating case study about Denver. The South Platte basin includes:

• City and County of Denver
• Upstream suburbs (Littleton, Englewood, Lakewood, Aurora)
• Multiple counties (Denver, Arapahoe, Jefferson, Adams, Douglas)
• Special districts like the Mile High Flood District (MHFD)

MHFD develops regional drainage criteria. However, it does not regulate land use; local governments do. As a result:

• Different jurisdictions adopt different stormwater standards, detention requirements, and update cycles
• Upstream communities can:
  • Allow higher impervious cover
  • Use less conservative rainfall assumptions
  • Provide insufficient detention
• Flows arriving at Denver often stack on top of each other and higher in volume
• Cumulative peak flows exceed what any one jurisdiction modeled
• No entity is responsible for system-wide flood control.

Need for Basin-Wide Master Planning

According to the EPA, each jurisdiction optimizes locally, not basin-wide. Upstream cities capture the tax base from new development and export their runoff downstream. Meanwhile, downstream, Denver bears the flood risk and mitigation costs.

Denver has acknowledged the need for basin-wide master planning. But historically, many tributaries fell outside FEMA mapping and were handled locally. Imagine every city along a freeway each designing the freeway to meet its own needs. That’s the system in flood control.

Storm sewers, channels, and detention systems do not align across boundaries and have mismatched capacities.

Encroaching development has already narrowed the South Platte floodplain. But no single entity has tracked the loss of floodplain storage.

Furthermore, no one jurisdiction coordinates infrastructure development of bridges and highways where they intersect drainage. Undersized crossings create system-wide backwater effects. 

In addition, the South Platte is heavily regulated by upstream reservoirs, which the Army Corps operates. But urban stormwater systems are operated locally and not fully synchronized. Sound familiar?

If that’s not bad enough, funding is also fragmented, leading to competition for funds. So projects advance unevenly across the basin, according to the EPA.

Chicago’s 200+ Drainage Jurisdictions

In Chicago, suburban expansion has increased runoff, but regional drainage capacity has not kept pace.

The Chicago area has even more extreme jurisdictional fragmentation than Denver. Cook County and three surrounding counties have more than 200 municipalities, plus a variety of state and federal agencies all sharing responsibilities for parts of the drainage.

Historically, each county has had different design storms, release rates, and detention requirements. Previously developed areas have had trouble keeping pace with upstream expansion.

The Chicago Area Waterway System also has three main rivers: the Chicago, Des Plaines and Calumet rivers. No single authority controls basin-wide runoff timing, impervious cover, or development in flood-prone areas.

Fragmented Governance Defies Attempts to Unify It

In the Houston area, efforts to overcome similar problems have met with mixed success. 

In 2022, Harris County Commissioners Court reaffirmed the need for minimum drainage standards in the region. The program was started in 2020 by the Harris County Engineering Department. The idea: to get all municipalities and other counties that drain into Harris County to adopt the same minimum drainage standards.

But after several early successes, the program seems to have quietly dropped out of the headlines.

Likewise, the San Jacinto Region 6 Flood Planning Group proposed minimum floodplain management practices throughout the river basin in 2025. But it is strictly an advisory group.

State Representative Dennis Paul introduced bills in the last two legislatures that would have established a river-basin wide flood control district. But each time, the bills have failed to gain traction and died in committees.

Texas 2036 and the American Flood Coalition hosted an informative seminar on 2/17/26. It emphasized lessons learned from other states about the need for river-basin-wide flood control to help ensure flood resilience. 

Everyone seems to recognize the need. But no one seems to have the power to address fragmented governance.

In Texas, we even have a state agency charged with flood mitigation investing in the development of property in floodplains and floodways…and denying FOIA requests to keep the investment secret. That’s how entrenched the problem of fragmented governance has become.

To see how fragmented governance compounds other factors that contribute to flooding, see the Lessons Page of this website.

Posted by Bob Rehak on 4/2/2026

3138 Days since Hurricane Harvey

The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.