HCFCD’s “Frontier Program”: A Collaborative Model for Future Flood Mitigation

Harris County Flood Control District’s (HCFCD) Frontier Program is an effort to avoid the problems of past development in newly developing areas. In the past, making developers solely responsible for flood mitigation on the land they owned likely resulted in small, expensive and suboptimal projects. Often, by the time shortcomings of their efforts became apparent, it was too late to do anything. Sometimes, to make room for effective flood-mitigation projects, whole subdivisions had to be bought out – after years of repetitive flooding. See two images below.

Halls Bayou next to the Fiesta on US59 north in 2002. Note the subdivisions on either side of the freeway and compare this shot to the one below.
To create the detention ponds on either side of the freeway, HCFCD had to buy out entire subdivisions, an effort that took more than a decade. The buyouts took 4-5 times longer than construction of the ponds.

Frontier Program Offers a Different Paradigm

The Frontier Program is an organized effort to plan for regional drainage infrastructure in advance of future land development.

Program managers work with developers and landowners to identify large-scale, mutually beneficial projects for drainage that cost-effectively maximize stormwater mitigation and water quality. Plans also include opportunities for public recreation and open space.

Basically, instead of forcing all the responsibility for floodwater detention onto developers, the developers buy detention capacity from HCFCD. But the detention capacity is in larger, more efficient ponds in optimal locations – large enough to accommodate future growth.

Currently HCFCD district has frontier programs operating in two watersheds: Little Cypress Creek and Langham Creek, both in northwest Harris County.

Little Cypress Creek Frontier Program

Little Cypress Creek’s watershed is 52-square-miles, but it has fewer than 30,000 residents. However, Little Cypress Creek is experiencing rapid development with construction of the Grand Parkway and lacks sufficient natural drainage to accommodate expected growth.

Little Cypress Creek Watershed

The Little Cypress Creek Frontier Program includes nine stormwater detention basins and stormwater conveyance improvements along the creek and its tributaries. The detention basins will hold more than 20,000 acre feet of stormwater. Together with conveyance improvements, flooding should be reduced 5-7 feet. This video, featuring Alan Black, HCFCD’s new acting director who lives in the area, explains how the collaborative effort with developers works.

The 2018 flood-bond funded the watershed’s Master Drainage Plan, as well as stormwater conveyance improvements on Little Cypress Creek from Cypress Rosehill to the confluence with Cypress Creek.

This innovative approach is in contrast to typical efforts in which individual land owners and developers install drainage infrastructure that serves their sites alone, resulting in smaller, isolated stormwater detention basins and minimum-width channels for stormwater management. By taking a regional approach, the Frontier Program protects existing developments and provides proper drainage for newly developing properties. 

Developers participate in the Frontier Program by paying a $4,000-per-acre fee to develop in the watershed service area. Developers also participate by excavating a portion of regional drainage facilities and by dedicating property for right-of-way. The Little Cypress Creek Frontier Program will use impact fees primarily to acquire additional right-of-way along the channel and for stormwater detention basins. 

Bottom line: the program calls for stricter stormwater detention requirements to mitigate runoff from new developments.

Upper Langham Creek Frontier Program

HCFCD operates another Frontier Program on Upper Langham Creek in its 16 square-mile watershed.

Major elements include, but are not limited to: 

  • The 190-acre Greenhouse Stormwater Detention Basin in Harris County Precinct 3. The basin ultimately will provide approximately 860 acre-feet of detention storage. 
  • Another 865-acre basin site at Precinct 3’s John Paul’s Landing Park. It will provide 2,360 acre-feet of detention storage.
  • A six-mile, 700-foot-wide, 14-foot-deep floodplain and stream corridor encompassing Langham Creek between the two basins. The variable-width, undulating corridor design features wide flood terraces (or benches), gentle side slopes and in-line detention storage volume for the mitigation of stormwater flows. Within the corridor, Langham Creek will be redesigned as a natural stable stream, with adjacent forested borders, native grasses, and stormwater quality mitigation features.
Here, developers pay a per-acre impact fee of $3,100.

Pay Now or Pay Later

Some residents have complained about spending HCFCD funds in areas where people do not yet live when they flood now.

But this is truly a case of “You can pay me now or pay me later.” And if you pay later, the cost is almost certain to be exponentially higher and take much longer…after a lot of heartbreak, misery and human suffering.

Analogy: think about a doctor who’s so busy dealing with critical care, she has no time to deal with preventive care.

Posted by Bob Rehak on 7/13/2021

1414 Days since Hurricane Harvey

New Caney ISD’s New West Fork High School Taking Shape

Between US59 and Sorters-McClellan Road, a few blocks south of Kingwood Drive, New Caney ISD High School #3 is finally taking shape. And it now has an official name: West Fork High High School.

On January 1, 2021, contractors were just starting to pour concrete for the foundations and parking lots. According to the New Caney ISD’s June update:

  • Site work storm drainage is 95 percent complete
  • Sanitary sewer system – 85 percent.
  • Electrical system – 98 percent.
  • Water system – 90 percent.
  • Building concrete slab – 90 percent.
  • Form and pour tilt-up panels – 99 percent.
  • Erect panels – 95 percent.
  • Structural steel – 55 percent.
  • Metal decking – 20 percent.
  • Concrete masonry unit (cinder block) masonry – 10 percent.

Aerial Photos Taken 7.12.21

Here’s how all that looked on the afternoon of July 12, 2021.

Looking NE from over Sorters-McClellan Road toward Kingwood Medical Center and Insperity (top center).
Looking east toward Field House and where playing fields will go just beyond it. US59 and Lowe’s in background.
Looking south at entire site. Sorters-McClellan Road on right. US59 on left and top.
A peak into New Caney ISD’s West Fork High School three-story structures
Looking north at entire site. Huge detention pond in foreground.
Looking North. Corrugated metal installed as base for roofing on four buildings.

Site Plan, Architectural Renderings for New Caney ISD West Fork High School

Here’s how it should all look when finished.

Architectural Rendering courtesy of New Caney ISD.
Architectural Rendering courtesy of New Caney ISD.
Architectural Rendering courtesy of New Caney ISD.
General plan for New Caney High School #3

New Caney ISD expects to finish construction on the 60-acre site in the summer of 2022. The site is in Montgomery County, but also the City of Houston’s Extra-Territorial Jurisdiction.

Detention Pond Requirements

The dry-bottom detention pond takes up approximately 5 of the 60 acres – or one twelfth of the site. Assuming it’s 12 feet deep, it would hold a foot of rain falling on the entire site. The new minimum recommendation for a site this size in Harris County and the City is .65 acre feet of detention per acre. That would be about 40 acre-feet of detention, which a pond 8 feet deep would hold.

Because the construction site is closed, and the plans I have don’t specify depth, it’s hard to say exactly how much capacity the detention pond has. But I’m guessing it’s deep enough to meet the new minimum requirements under Atlas 14. I say that judging by the height of the pond walls compared to the pipes leading into it.

I would expect no less from a public school system.

Posted by Bob Rehak on 7/12/2021

1413 Days after Hurricane Harvey

Lake Houston Dredging Starts Moving to East Fork

On Thursday last week, Stephen Costello, PE, the City of Houston’s Chief Recovery Officer, gave an update on Lake Houston dredging. Costello said that mechanical dredging was starting to move from the West Fork to the East Fork of the San Jacinto River.

Next Phase of Dredging Starting

This marks the beginning of the next phase in dredging after Harvey. Since 2018, dredgers have focused on the West Fork, which was 90% blocked by sediment in places, according to the Army Corps. The Corps and the City removed 2.9 million cubic yards of sediment from the West Fork. Now the focus will migrate to the East Fork, and then Lake Houston itself.

But to get to the East Fork mouth bar, dredgers must first deepen the channel south of Royal Shores that connects the two forks…or else take the long way around to the placement area.

Yellow dot represents most recent focus of dredging on West Fork. The dotted line branching off to the right through the channel is how dredger’s will get back and forth to the East Fork Mouth Bar (big yellow circle) and the placement area south of River Grove Park on the West Fork.

Channel Filled with Silt, Too

Costello said silt in the channel made it too shallow for pontoons and equipment to navigate back and forth safely.

Photos taken this afternoon show that the first equipment is starting to dredge the channel inside two ancient cutoff meanders of the West Fork.

Looking west toward West Lake Houston Parkway Bridge from over the channel connecting the West and East Forks.
Wider shot from farther back shows the dredge area within the cutoff meanders.
Looking East toward the East Fork and Luce Bayou (upper right).

As the last photo shows, at this time, no dredging activity has yet reached the East Fork.

Boaters: Exercise Caution Around Dredging Equipment

This cut-through is a popular shortcut for boaters. Boaters may wish to take the long way around for the next few months or, at a minimum, use extra caution. Those excavators have long arms and can turn suddenly. Remember: operators don’t have eyes in the backs of their heads. Make sure they acknowledge your presence before zipping past them.

Posted by Bob Rehak on 7/11/2021

1412 Days since Hurricane Harvey