Mayor Pro Tem Martin Provides Additional Details on Purchase of Woodridge Village

Houston Mayor Pro Tem Dave Martin issued a press release today that provided additional details about the potential Harris County/City purchase of Woodridge Village.

Unanimous County Vote For Earnest Money Contract

As reported Tuesday evening, Harris County Commissioner’s Court voted unanimously to authorize the Harris County Real Property Division to negotiate an earnest money contract with Figure Four Partners, LTD. The purchase includes two tracts of land containing 267.35 acres located in Montgomery County, which could become the Woodridge Village Stormwater Basin.

The purchase price of $14,019,316.00 is about $5 million below the appraised value of the land. Martin thanks Harris County Judge Lina Hidalgo, Precinct One Commissioner Rodney Ellis, Precinct 2 Commissioner Adrian Garcia, Precinct 3 Commissioner Steve Radack, and Precinct 4 Commissioner Jack Cagle for their support. 

TWDB Loan Application

Said Martin, “This is the first crucial step in completing an inter-local agreement between the City of Houston and Harris County to purchase Woodridge Village.” This vote, coupled with the upcoming announcement from the Texas Water Development Board of the City’s eligibility to apply for a 0% interest loan to help develop the Woodridge Village project, will help reduce future flooding in Kingwood and the Lake Houston region.” 

During May of 2019, as well as Tropical Storm Imelda almost exactly a year ago, Woodridge Village contributed to flooding and heavy sediment deposited in much of northern Kingwood.  Mayor Pro Tem Martin called for the immediate stoppage of the planned development and sale of this site.

End-of-Year Deadline

Martin says he is happy to see the execution of the earnest money contract. It will lock in the purchase price for 120 days. The purchase of the property is contingent upon Harris County Flood Control District (HCFCD) entering in to an interlocal agreement with the City of Houston within 120 days of signing the earnest money contract. 

Last week, the City of Houston Public Works Director, Carol Haddock, submitted a letter of intent to the HCFCD Executive Director, Russ Poppe. It acknowledges the commitment by both parties, City and County, to execute a binding inter-local agreement no later than December 31, 2020. 

“A binding agreement for the proposed transaction can only be evidenced by HCFCD executing a finalized inter-local agreement which will need the approval of Houston City Council” said Martin. Martin also said he “is committed to working with every council office to gain their support of this interlocal agreement, as mutual support of projects to reduce future flooding citywide are key to a successful resiliency plan.” 

The location of the Figure Four Property is suitable for a sub-regional stormwater detention facility, which will help protect affected residents from future intense rainfall events.

Dave Martin, Houston Mayor Pro tem

Consolidation of Three Wastewater Treatment Plants on Woodridge Property

“Additionally, the City has identified a need for approximately 73 acres of the total site to serve as the location for a regional wastewater treatment plant,” says Martin. “This would facilitate consolidation of three wastewater treatment plants in the Kingwood Area.”

Two of these three plants were significantly impacted by flooding during Hurricane Harvey.  

The City would contribute cash for the portion of the site that would house the new wastewater treatment facility.

Land in Lieu of Cash for Floodwater Detention Portion of Property

For the floodwater-detention portion of the property, the City would contribute land in lieu of cash for Harris County Flood Control District flood-risk-reduction projects. 

Construction Funding Details Still to Be Worked Out

Once purchased, the City and District will work together to find additional funding to construct additional stormwater detention on the site to maximize downstream benefits. The Perry Homes/Figure Four Partners property only contains enough detention capacity at the moment to handle about 60% of Atlas 14 requirements. Atlas 14 is NOAA’s attempt to update rainfall precipitation frequency statistics. The need for the update became apparent after four so-called 500-year rains in five years (Tax Day, Memorial Day, Harvey, Imelda).

Despite the recent completion of three additional detention ponds, the Woodridge Village site currently only has about 60% of the detention capacity needed to handle a true 100-year rain (according to Atlas-14 requirements). Photo 9/11/2020.

The City has recently submitted an abridged application to the Texas Water Development Board (TWDB) for a $30 million grant/loan to fund a flood-damage-reduction project on Taylor Gully.

TWDB manages the capital Flood Infrastructure Fund (FIF) created by the 86th legislature in 2019, thanks to Texas State Senator Brandon Creighton and Texas State Representative Dan Huberty. The legislature mutually seeded the FIF program with approximately $790 M, the state has received applications requesting over $2.3 billion to date. Staff recommendations for applications to advance to the formal comprehensive application submittal phase are pending. 

“Ultimately, approval of this earnest money contract is a huge win for the City of Houston and Kingwood residents,” said Martin. “We hope to have more good news once the city has completed its application to the Texas Water Development Board for improvements to Taylor Gully, which will happen later this year.”

Posted by Bob Rehak on 9/17/2020

1115 Days after Hurricane Harvey and 364 since Imelda

Construction of Northeast Water Purification Plant in High Gear

During a flyover of the City of Houston’s Northeast Water Purification Plant Expansion project on 9/11/2020, I counted 13 construction cranes operating simultaneously on different parts of the site. The site stretches a full two miles from the start of the plant near the northeast corner of Beltway 8 to the tip of the water intake platform in Lake Houston. Here are photos that show the scope of this massive construction project.

The water intake platform stretches approximately 1100 feet out into Lake Houston.
The 108-inch intake pipes are larger than some pieces of construction equipment.
Looking NE toward Lake Houston along the path that the intake pipes will take through Summerwood.
Looking west toward the main treatment plant, with Beltway 8 in the background. Construction began in 2018.
Looking SW across the eastern portion of the new plant.
Looking SW across the western portion. The site is divided into about 10 sections each as large or larger than a city block.
A close up of construction activity in just one of the sections.
Looking straight east back toward Lake Houston from the western edge of the plant. Note the current water treatment plant in the foreground. It produces about 80 million gallons per day of fresh water.
Looking north over the center of the site.
Looking WNW. Note the NE corner of Beltway 8 in the top left. The plant expansion will provide another 320 million gallons per day.
For scale, note the size of the man on the scissor-lift in the red circle.

The plant expansion will supply 320 million gallons per day of treated water capacity in addition to the current 80 million gallons per day. So capacity will quintuple by completion in 2024.

Converting Area to Surface Water to Reduce Subsidence

The expansion of capacity will allow more water systems in the region to convert from groundwater to surface water. That should reduce subsidence and help avoid flooding.

Improved Techniques

According to the City, “The expansion will include conventional treatment processes like the existing plant that help coagulate, settle, filter, and then disinfect water.” Quality will exceed requirements set forth by the Texas Commission on Environmental Quality.

In addition, says the City, an advanced oxidation process called ozonation will disinfect water to help ensure that harmful organisms such as Giardia and Cryptosporidium are eliminated. Ozonation also helps eliminate taste and odor causing compounds, which improves the aesthetic quality of the water supplied by the plant.

Receive Updates

This construction update by the City of Houston shows additional ground-level and drone photos of the construction. You can sign up to receive future updates here.

Contractor Portal

Here is the main procurement portal for the project. Contractors looking for work on the site can sign up here.

Posted by Bob Rehak on September 17, 2020

1115 Days since Hurricane Harvey

How LIDAR is Used to Develop New Flood Maps

The Texas Water Development Board published a new video today in their Texas Water Newsroom. The title: “Data from the sky informs flood planning on the ground.” The video explains how Lidar (light detection and ranging) data helps develop accurate, up-to-date flood maps.

900X Higher Resolution

Surveyors can acquire high resolution data quickly from the air using pulses of light.

Lasers mounted under planes pulse hundreds of thousands of times per second producing incredibly detailed images of the terrain.

Texas Water Development Board

The data has one square-meter resolution compared to the old standard of 30 square-meters used in older USGS surveys. That’s a 900x improvement (1m x 1m vs. 30m x 30m) in resolution.

That increased resolution lets mapmakers see much more detail in the landscape, including low areas where water tends to pool during floods.

Play the Video

Filtering Out Buildings and Foliage Reveals Terrain

By filtering out portions of the spectrum, say those that have to do with buildings and foliage…

Screen Capture from TWDB Video

…scientists can reveal the terrain under them.

Lidar Now FEMA Requirement for Mapping

FEMA now requires the use of Lidar in floodplain mapping. As the state continues to grow rapidly, Lidar helps floodplain modelers better understand what is happening on the ground during a flood.

Inspiring the Next Generation

This is a fascinating little video. It has enough meat for curious adults. It also has a wow factor for students that might someday inspire interest in science, technology or engineering careers.

Updated Harris County Floodplain Maps

Harris County Flood Control District uses Lidar data to help develop the next generation of flood maps for the region. FEMA last updated the maps in 2007 as a result of massive flooding from Tropical Storm Allison. The District could release preliminary maps as early as 2022. But it could then take several more years for FEMA to review and approve them. The FEMA process involves a lengthy public comment period.

Source: Harris County Flood Control District.

Posted by Bob Rehak on 9/16/2020

1114 Days since Hurricane Harvey