The I-610 and I-69 interchange next to Bellaire is finished, and it holds rainwater too
The big highway interchange on Bellaire's edge, where the West Loop (I-610) meets the Southwest Freeway (I-69), is done. TxDOT says it has wider connector ramps. It also has two detention ponds below the road that hold stormwater. Here is what changed, what it cost and why a road project is part of the flood story.
The short version
- TxDOT, the Texas Department of Transportation, announced the interchange rebuild finished in August 2024. The project cost $259 million, and $87.5 million of it came through Texas Clear Lanes.
- The single-lane connectors between the two freeways became two-lane connectors, and new access ramps were added.
- TxDOT's August 2024 announcement says two detention ponds sit directly below the interchange, with four pump stations and underground pipes. Another TxDOT document gives different counts, described below.
What was built, and who paid
The interchange sits where Interstate 610, the West Loop, crosses Interstate 69, the Southwest Freeway. TxDOT says it serves downtown Houston, southwest Houston, the Galleria, Bellaire, West University and Rice Village.
TxDOT calls it a $259 million project. Of that, $87.5 million came through Texas Clear Lanes, a TxDOT funding source.
TxDOT announced the finish in August 2024. TxDOT's slides from its 2024 conference list the start as early 2018. The Community Impact newspaper reported a different start, September 2017, so the start date is not settled.
What changed for drivers
The main change is the connectors. These are the ramps that carry you from one freeway to the other. TxDOT says it converted the single-lane connectors between the two freeways into two-lane connectors. Its conference slides say four direct connectors, named B, F, G and H, went from one lane to two.
TxDOT lists other changes: - New access ramps were added. - Shoulders were added on the I-610 West main lanes bridges. - Vertical clearances, the height under a bridge, were increased.
TxDOT's project overview says the purpose was to improve safety and mobility and reduce congestion. It says the project does this by widening the connector ramps to two lanes, increasing sight distances and vertical clearances, and providing remedies to eliminate weaving. Weaving is when cars cross each other's paths to get on or off a freeway in a short space.
The Community Impact newspaper reported that the stretch of the West Loop between I-69 and I-10 West, about 3.6 miles, is the most congested road segment in Texas. It also reported that congestion on that stretch costs $120 million a year in fuel and the value of lost time. Those figures are the newspaper's, not TxDOT's.
The ponds and pumps
A detention pond is a basin built to hold stormwater for a while and let it out slowly.
TxDOT's August 2024 announcement says two massive detention ponds sit directly below the interchange, along with four pump stations and underground pipes. It says these are designed to retain stormwater and release it safely to area drainage systems.
The Community Impact newspaper reported that the project includes storm resiliency features.
TxDOT's own documents do not agree on the counts. The August 2024 announcement says two detention ponds and four pump stations. TxDOT's 2024 conference slides list six detention ponds and three pump stations. The numbers above are the announcement's. The slides also list pump sizes in gallons per minute.
The slides also list flooding from tropical storms and hurricanes as a challenge during construction.
What the pages do not say
TxDOT's pages say how the ponds and pumps are built. They do not say how much water the ponds hold or what the ponds do for nearby streets in a big storm.
For the bigger picture, the Harris County Flood Control District says Harris County voters approved $2.5 billion in bonds on August 25, 2018 to finance flood damage reduction projects. On its Brays Bayou page, the district describes stormwater detention basins as storing excess stormwater and slowly releasing it back to the bayou after the threat of flooding has passed.
Read the fine print
- The cost, the Texas Clear Lanes share and the pond and pump station counts come from TxDOT's August 2024 announcement. TxDOT's conference slides give six ponds and three pump stations.
- The congestion cost and the 3.6-mile figure come from a newspaper report, not from TxDOT's own pages.
Before you go
- If you drive this interchange, look for the new two-lane connectors.
- If your street floods, ask the city and the county flood control district what projects are planned near you.
- Check TxDOT's project page for any updates.
Sources
- TxDOT, Project Ribbon Cutting, August 2024 update (https://www.txdot.gov/hou610at69/news-and-alerts/project-updates-august-2024.html)
- TxDOT, I-610 West Loop at I-69 project overview (https://www.txdot.gov/hou610at69/project-overview.html)
- TxDOT, I-610 West Loop at I-69 Southwest Interchange Reconstruction, 2024 conference presentation (https://www.txdot.gov/content/dam/docs/division/cst/2024-conference-pres/2024-cst-track-9a-610at69-revised-lessons-learned.pdf)
- Harris County Flood Control District, Brays Bayou bond program page (https://www.hcfcd.org/2018-bond-program/watersheds/brays-bayou-bond-program)
- The Community Impact newspaper reported on the finish and the congestion figures (https://communityimpact.com/houston/bellaire-meyerland-west-university/transportation/2024/08/01/txdot-officials-finish-work-on-yearslong-i-69-loop-610-connector-ramp-project/)
En español
La reconstrucción del cruce de la carretera I-610 (West Loop) con la I-69 (Southwest Freeway), junto a Bellaire, terminó. TxDOT, el Departamento de Transporte de Texas, anunció la conclusión en agosto de 2024. El proyecto costó $259 millones, y $87.5 millones vinieron de Texas Clear Lanes. Los conectores de un solo carril entre las dos autopistas ahora tienen dos carriles, y se agregaron rampas de acceso, acotamientos y más altura libre bajo los puentes. El anuncio de TxDOT de agosto de 2024 dice que dos estanques de detención están directamente bajo el cruce, junto con cuatro estaciones de bombeo y tuberías subterráneas. Un estanque de detención guarda el agua de lluvia y la deja salir poco a poco. Dos documentos de TxDOT no coinciden en las cantidades: las diapositivas de su conferencia de 2024 mencionan seis estanques y tres estaciones de bombeo. Usamos las cifras del anuncio. Las páginas de TxDOT no dicen cuánta agua guardan los estanques. El Distrito de Control de Inundaciones del Condado de Harris dice que los votantes aprobaron $2,500 millones en bonos el 25 de agosto de 2018 para proyectos de reducción de daños por inundaciones.
The HERE Bellaire team