Update on County Flood Bond Status and Some Proposed Projects

The fast-approaching Harris County Flood Bond referendum scheduled for August 25 is forcing people to focus on their top mitigation priorities. The Flood Control District is actively soliciting community input on projects that we think are needed in this watershed.

Harris County includes 22 different watersheds within 1,756 square miles. Each watershed has its own independent flooding problems and presents unique challenges. We need to communicate with the District to ensure that:

  • Solutions for our area benefit the largest number of people possible
  • The language in the bond proposal, if adopted, would let the county address our needs

That’s why the County established a flood bond website and hotline. That’s also why County Judge Ed Emmett is meeting with Kingwood residents on July 10 at 6 pm at the Kingwood Community Center.

Harris County Flood Control Bond Page at https://www.hcfcd.org/bond-program/.

Here is the current list of projects included in the Bond Proposal. Scroll down to page 7 to see those associated with the San Jacinto Watershed as of 6/1/18.

You can also click on the interactive map of the county’s bond program website. Zoom in on our area and start clicking on icons to reveal the location and details of projects.

  • Do those sound like your top priorities?
  • Would the current language in the bond proposal even allow the County to address your top priorities?

Here are four ideas that have been proposed for this area that could have a huge impact on flooding.

Four Important Projects

  1. More river dredging. We must restore the velocity and carrying capacity of the entire river, not just a small portion of the West Fork and not just to pre-Harvey conditions.  The Army Corps of Engineers is restoring a 2-mile stretch to pre-Harvey conditions. But we need to dredge deeper and further. And we need to do it on a regular basis. In 2000, Brown & Root recommended dredging and periodic maintenance as the best option they examined to mitigate flooding. Neither was ever done. That’s a huge part of the reason why we face increased flood risk today. Personally, I’d like to see the East and West Forks restored at least to their condition in the Year 2000.
  2. More floodgates on Lake Houston. Freese and Nichols found that 14 additional gates could have lowered the flood level during Harvey by up to 1.9 feet. That could help reduce flooding both upstream and downstream from the dam. How? By releasing water before a storm in a gradual, controlled fashion, you can create more capacity within the lake, so you can discharge water at a lower rate as the reservoir fills back up.
  3. More upstream detention. The idea is to offset Lake Conroe Dam releases by holding up water elsewhere. Spring,  Cypress and Lake Creeks have all been mentioned as possibilities. TACA also pointed out that sand mines could make excellent detention lakes.
  4. Better ditch maintenance. Before Harvey, many of our drainage ditches became silted and clogged with fallen trees. Some, like Ben’s Branch, near the public library, still have islands and standing water in them. Keeping these ditches clear and free flowing should be a high priority. We must ensure water has a way to get to the river without spilling out of the ditches.

Does Language in Bond Proposal Support These Ideas?

Here is the the most recent iteration of the language in the County Flood Bond Proposal.  Matt Zeve, Director of Operations for the Flood Control District said he expects several more minor changes before the text gets locked down.

Because the text is written for lawyers, by lawyers, I asked an expert to see if this language would allow the projects above to even be considered. One of the answers surprised me.

  1. Dredging? Yes. Language allows “channel improvements” in cooperation with “City of Houston.”
  2. Floodgates? Yes. Language allows “construction of improvements” in connection with “flood damage reduction” to “hold or convey storm water” in cooperation with “City of Houston.”
  3. Upstream Detention? Yes. Language allows “purchasing lands, easements and rights of way” and constructing “detention basins” in “any county adjacent to Harris County.”
  4. Ditch Maintenance? No. Language pertaining to maintenance was specifically taken out of this iteration of the proposal. HOWEVER…my expert pointed out this surprising twist. Currently, half of the Flood Control District’s $120 million budget is allocated to capital projects and about $20 million to maintenance other than mowing. If the bond proposal is approved, the $60 million currently allocated for capital improvements could be re-allocated to maintenance. That would almost quadruple the budget available for ditch maintenance. That extra money could be used to hire contractors to accelerate ditch repairs.

What are Your Top Priorities?

What do you think would help the most? According to Community Impact, County Judge Ed Emmett said the county hopes to have a final list of projects to share with the public by Aug. 1. Early voting will begin on Aug. 8. Thus, you have only six weeks to influence the project list if you want to.

Give the County Your Thoughts

Speak now or forever hold your peace. Join the conversation. Please communicate your thoughts to Harris County Flood Control ASAP. The County is actively soliciting ideas for the bond proposal right now.

Remember, according the Greater Houston Flood Mitigation Consortium, the Lake Houston area historically has received 0% of the region’s flood mitigation dollars, but sustained 14% of the region’s damage during Harvey. Let’s make sure we get our fair share of flood control dollars this time around and that they’re focused where they will do the most good.

Call 713-684-4107 or mail comments to 9900 Northwest Freeway, Houston, Texas 77092, ATTN: Bond Program Communications.

Also, please mark your calendar. Come to the meeting with Judge Ed Emmett at the Kingwood Community Center on July 10 from 6 to 8 pm. Learn more about the bond proposal and give the Judge your feedback directly. Bring everyone in your neighborhood!

Posted by Bob Rehak 6/14/2018

289 days since Hurricane Harvey

Just In Time for Tropical Wave: Harris County Flood Control Announces Near-Real-Time Inundation Mapping

Approaching Storm

Harris County Flood Control District (HCFCD) has introduced a new, near-real-time, inundation mapping tool – just in time for a tropical disturbance predicted to affect the Houston area from this Saturday through Monday. The NOAA map below (created 6/13/18) shows expected rainfall totals associated with the disturbance which is currently centered just south of the Yucatan. Depending on how far north you live in the Houston area, the storm could dump from 3 to 7 inches of rain on you.

Jeff Lindner, Director of Hydrologic Operations for HCFCD cautions that rainfall totals will be adjusted in coming days and that locally heavy rainfall within the storm could create flash flooding with rains of 4 inches in one hour.  All of which leads me to the second part of this post…

New Inundation Mapping Tool

The Harris County Flood Control District has added inundation mapping to the Harris County Flood Warning System, providing a new tool to help you make safety decisions during flooding events.  Information is posted on the Harris County Flood Warning System website (www.harriscountyfws.org).

The inundation mapping system even contains a historical feature. If you like, you can go back to floods in 2015, 2016, and 2017. The image below is from Harvey and gives you an idea of what the mapping feature would potentially show during an actual event.

The Harris County Flood Control District’s new near-real-time-inundation mapping tool can be accessed through their Flood Warning System at harriscountyfws.org. It also contains a historical feature that lets you review the extent of prior floods. Shown above: Hurricane Harvey. You can zoom in to see details within 500 feet.

15-Minute Updates

Lindner says, “Moving forward, this will be available every 15 minutes based off of the current gage data along our creeks and bayous.”

The new inundation mapping tool generates a map of flooded areas adjacent to Harris County bayous and creeks where the Flood Warning System has water level gages. The tool runs continuously to provide live inundation mapping during a flood, though the results may be delayed as much as 15 minutes. That’s due to the time required to generate maps from gage data.

Please share this with your neighbors and friends so they can use this tool during heavy rains and flooding.

How Inundation Mapping Works

Inundation mapping provides information about areas of current bayou and channel flooding, based on information collected by Flood Warning System gage stations strategically placed along Harris County bayous and their tributaries.

During heavy rains, to monitor inundation levels near your home, school, work place, relatives, or commuting routes, just type in an address at or near your area of interest.

Inundation mapping can zoom from county-wide down to 500 feet. The map depicts the current extent of flooding, but does not include water depth. To experiment with it:

  • Go to harriscountyfws.org on your desktop or mobile device.
  • The “MAP VIEW OPTIONS” section at the top left allows you to add inundation mapping and other features to the county map. (When there has been no rainfall, the inundation mapping feature will not be available.)
  • Go to the “ADDRESS SEARCH” box in the lower left column and type your address.
  • The map will zoom to the gage station nearest to your location of interest. The icon shows the amount of rainfall (in inches) received at that location in the past 24 hours.
  • Click on the gage station icon for more detailed information.
  • Other “MAP VIEW OPTIONS” allow you to add watershed boundaries, drainage channels and channel status icons to the county map. You can also change the setting in the “RAINFALL DATA” section to see rainfall during various time periods.

An instructional video that shows how to use the entire Flood Warning System, including the new inundation mapping tool, is available on our YouTube page at:https://youtu.be/eb4AFIspQSQ

Experiment

A personal review.

I typed in my address as instructed above and zoomed into my neighborhood as closely as I could. Then I used the historical feature to type in different dates and times during “Harvey Week” starting with 8/25/17 and going to 9/1/17.

The results were not perfectly accurate down to the household level, but they certainly were to the block level.  With this tool, a weather forecast and upstream gage data, people could have seen the flood coming at them and made better decisions that would have protected their property and safety.

Limitations of Inundation Mapping System

This is NOT a notification system for flood watches, warnings or evacuations. It’s a tool to help make critical decisions that may ultimately reduce risk.

The mapping tool will only generate a new map if the gage data for water levels changes by one-half foot. Also, damage to gages during a flood may affect the accuracy of the flooding estimate and inundation mapping in the vicinity of the damaged gages.

The new mapping tool does not show all flooding that may occur.  This map will not depict flooding from:

  • Channels and tributaries without gages
  • Ponding, which may occur during or after intense rainfall when water gathers in low-lying areas, such as in streets when the capacity of the storm sewer is exceeded.
  • Sheet flow, which occurs when intense local rainfall flows overland to reach a channel. Frequently, this exists when water “ponds” in streets deep enough to flood residences that are not even near a creek of bayou. The water will seek a path to the channel by flowing overland, flooding residences and other structures that are in that path.

Posted 6/13/18 by Bob Rehak

288 Days since Hurricane Harvey

Benefits of Flood Insurance vs. Disaster Assistance

At the 2018_FloodWarn_Training_Kingwood on May 2, Diane Cooper of FEMA pointed out several startling statistics about the Hurricane Harvey Flood and flood insurance.

Home outside the 100-year flood plain during Hurricane Harvey.

According to the City of Houston, approximately 90,000 structures OUTSIDE of the 0.2% Risk Area (500-year flood plain) were impacted. Additionally, another 30,500 structures INSIDE the 1% risk area (100-year flood plain) and 29,000 in the 0.2% risk area flooded.

However, out of approximately 150,000 total homes flooded, only 26,511 insurance claims were filed. That’s because approximately only one in six Houstonians had flood insurance.

Most people felt that if they lived outside the 1% risk area, flood insurance was an expense they could do without. Yet four in every five flooded homes were outside the 1% risk area.

Let’s examine flood insurance vs. disaster assistance as hedge against such risk.

The following information came from the National Flood Insurance Program (NFIP) portion of the FEMA website.

Flood Insurance

Flood insurance has six primary benefits:

  • You are in control. Flood insurance claims are paid even if a disaster is not declared by the President.
  • More than 20 percent of NFIP claims from from outside of mapped Special Flood Hazard Areas.
  • There is no payback requirement.
  • Flood insurance policies are continuous, and are no non-renewable or canceled for repeat losses.
  • Flood insurance reimburses you for all covered building losses up to $250,000 for residential occupancies and upon to $500,000 for businesses. Contents coverage is also available up to $100,000 for residential occupancies and up to $500,000 for businesses.
  • The average cost of a flood insurance policy is about $600 annually. The cost of a preferred risk policy is less than $450 annually, if you live in a moderate-to-low-risk area.

Disaster Assistance

Compared to flood insurance, disaster assistance has several drawbacks.

  • Most forms of Federal disaster assistance require a Presidential declaration.
  • Federal disaster assistance declarations are not awarded in all flooding incidents.
  • The most typical form of disaster assistance is a loan that must be repaid with interest.
  • The duration of a small Business Administration (SBA) disaster home loan could extend to 30 years.
  • The average Individuals and Households Program award for Presidential disaster declarations related to flooding in 2008 was less than $4,000.
  • Repayment on a $50,000 SBA disaster home load is $240 a month or $2,880 annually at 4 percent interest.

The More You Know, the Better Flood Insurance Looks

Everyone should have flood insurance. Remember, not all flooding comes from rivers and streams. During Harvey, thousands of homes flooded from overflowing streets when storm drains and sewers backed up. Floods can happen anytime, anywhere…even in deserts.

Homeowners insurance policies typically don’t cover flood damage. Disaster assistance payouts will not come close to covering all the damage that people typically suffer from a flood. And the most common type of disaster assistance is a loan that must be repaid with interest.

You can buy flood insurance through the NFIP regardless of your flood risk; it’s easy to get through any licensed broker. You can even use your credit card. Consider it seriously as we enter another hurricane season and a tropical wave is expected to slime us this weekend.

Posted by Bob Rehak on June 12, 2018

287 Days since Hurricane Harvey