Tag Archive for: Northpark detention basins

February ’24 Northpark Expansion Update Including Lane Closures

In the past two weeks, construction activity for the Northpark expansion project has focused primarily on the ponds at US59 that will double as detention basins.

However, progress has also been made farther east. CenterPoint has been busy relocating gas lines. Contractors now have signed right-of-entry permits to UnionPacific (UP) property. And they have been busy installing a storm-sewer junction box in front of the Shell Station at Loop 494.

But the thing most people will notice this week is that two of the four outbound lanes on Northpark at 59 are now closed and will remain that way for several months.

Entry Ponds

I took all the pictures below during the last week of February 2024. For the first time, you can clearly see the outlines of both ponds. Contractors started on the north pond first. So, it is further along. But the outline of the south pond, ringed by transplanted trees, is now also clearly visible.

Looking N at S Pond
Closer shot shows three more decorative areas for plantings, one on each side of the triangle.
Men working on foundation for retaining wall around one of the landscaping areas along Northpark Drive.
Reverse angle. Looking S at N pond.
Retaining wall around area to be landscaped was just completed and contractors were removing forms for concrete.
Pipe for storm drains is being stockpiled in North Pond.

As you can see from these photos, the sides of the ponds will slope toward the middle. Maximum depth for each pond will be about 20 feet.

According to Northpark Expansion Project Manager Ralph De Leon, excavation currently is down to about 7 feet max, the approximate location of the water table. So, the ponds will eventually get almost three times deeper than they are now. That’s a lot of dirt to move!

Contractors will use the dirt to fill in over the box culverts which will go down the center of Northpark. But because of several utility conflicts, placement of the box culverts had to be put on hold.

So, contractors are storing the dirt at the Eagle Sorters Sand Mine on the West Fork. It will be transported back to Northpark when needed.

Stored dirt (center) from entry ponds at the Eagle Mine on Sorters-McClellan Road.

After Harvey, the Army Corps used the Eagle Mine as a placement area for sand and silt dredged from the San Jacinto West Fork.

Once contractors place the dirt over the culverts, they can then begin paving two additional lanes of traffic over where the center ditch used to be.

UnionPacific

Now that all the legal agreements are in place and engineering plans have been approved, work can begin around the UP tracks. It won’t happen immediately though. According to UP, rail traffic is now in its peak season. In the coming months, expect to see three types of activity.

  • Boring under the tracks to take excess stormwater from the entry ponds to the Kingwood Diversion Ditch and Bens Branch via Ditch One.
  • Placement of a one-piece concrete bed/continuous section of track over the project area with signal upgrades
  • Creation of ground-level feeder roads/turn lanes on each side of main lanes which will bridge over the tracks.
ditch one
Looking E at Ditch One, Part of Northpark Expansion Drainage. Northpark is in upper right.

Northpark Expansion Project Lane Closures

Starting yesterday, 2/26/24, two westbound lanes on Northpark at 59 closed temporarily for reconstruction during the next few months.

During the first month, the existing left turn lane and one through lane will remain open. Then traffic will switch onto the newly constructed lanes, while the other lanes are completed. The contractor will install new storm sewer pipes and inlets along with new concrete roadway.

Looking N. Demolition has already begun on two westbound lanes.
At 4 PM on Tuesday afternoon, OUTBOUND traffic on northpark was backed up past Russell-Palmer Road because of the lane closures.

Westbound traffic should expect delays and alternative routes are encouraged.

Judging by the outbound delay I saw today, I plan to avoid this bottleneck for the duration of the Northpark Expansion project.

Other Activity

The Lake Houston Redevelopment Authority (LHRA) and City Councilmember Fred Flickinger are scheduled to meet with the City Attorney on Thursday, 2/29/24, to discuss the Entergy issue. After years of discussion, the utility has not yet begun moving its power lines and transformer out of the way.

LHRA will hold a board meeting on March 14th, in part, to discuss Entergy options.

On Friday, March 15, the City, LHRA and Entergy will meet. Hopefully, they will come to an agreement that doesn’t involve legal action, which could increase costs and cause delays.

Reminder: Phase II Meeting on March 7

Also don’t forget the public input session on March 7 from 5-7 PM. LHRA and TxDOT will discuss plans for the next phase of the project. It will reach past Woodland Hills Drive.

Thursday, March 7, 2024
from 5-7 p.m.
Kingwood Park Community Center
4102 Rustic Woods Dr.
Kingwood, TX 77345

Part of Northpark Phase II

The Northpark Expansion project will not only move traffic faster, it will create an all-weather evacuation route for 78,000 people in the Kingwood and Porter areas. During Harvey, other evacuation routes were cut off.

For More Information

For more information about the project including construction plans, visit the project pages of the LHRA/Tirz 10 website. Or see these posts on ReduceFlooding:

Posted by Bob Rehak on 2/27/24

2373 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.

Excavation of Second Northpark Detention Basin Well Underway

Since last week’s post about the Northpark expansion project, contractors have made significant progress on the two stormwater detention basins at US59. Contractors are forming concrete retaining walls for both ponds. They have excavated the north pond down to the water table. And, in the south pond, contractors are mounding dirt in three locations for removal and temporary storage.

The ponds are designed to provide storage capacity for excess stormwater that might otherwise flood this crucial intersection. The intersection will provide the final link in the only all-weather evacuation route in Kingwood for 78,000 residents. During Hurricane Harvey, floodwaters blocked both Hamblen Road and Kingwood Drive.

Photos Taken on 2/16/24

I took the following photos at noon on Friday, 2/16/24..

South Pond
Looking NW across the south pond at Northpark and US59. Transplanted trees in foreground.

Contractors are temporarily storying the dirt at the Eagle sand mine on Sorters-McClellan Road. They will later retrieve it to fill in the road bed above the box culverts that are replacing the center ditch down Northpark.

From opposite direction, you can see three mounds of dirt awaiting relocation and the first concrete wall by grass.
Ground level shot shows height of pile.
North Pond

Contractors began working on the north pond first, so it is further along. However, excavation is not yet complete. They will do it in two stages. For now, they’ve excavated down to the water table. When pond liners arrive (any day now), contractors will begin the second phase and excavate even deeper.

Looking NNW at north pond. Note wet areas. They indicate level of water table.

The pipe you see lined up in the photo below will help carry excess stormwater in the ponds to Ditch One which parallels Northpark on the north. From there, it will follow gravity to Bens Branch and the Kingwood Diversion Ditch which will carry it to Lake Houston.

Looking SE at retaining wall for what will become the focal point of the North pond.
Looking S from over north pond at another retaining wall around a grove of trees.
When complete, the ponds should look like this.

CenterPoint Almost Finished Burying New Gas Line

CenterPoint had one westbound lane blocked off at noon today where it was burying a new gas line outside of the City’s easement. Reportedly, the utility is close to finished with the relocation effort. It is replacing one line that used to go down the center ditch with two, one on each side of the expanded roadbed.

As Ralph De Leon, the project manager for the Lake Houston Redevelopment Authority/TIRZ 10 said, “It’s one thing for a company to say they’ll handle something. It’s another for them to show up with giant boring machines to make it happen.” De Leon was happy with the progress they were making.

Still No News from Entergy

Entergy had until the close of business today to respond to the City of Houston’s demand for a plan to relocate its electrical services along Northpark. Project coordinators asked Entergy to move its lines in 2020. But the company has not moved anything to date.

It’s not clear at press time, whether Entergy met the City’s deadline. More next week when I learn more from City Hall.

For More Information

For more information about the project including construction plans, visit the project pages of the LHRA/Tirz 10 website. Or see these posts on ReduceFlooding:

Posted by Bob Rehak on 2/16/2024

2362 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.

First Northpark Entry Pond Taking Shape

One week after contractors began digging the first Northpark entry pond, you can see a broad area that has already been excavated.

Looking S toward Northpark and US59 on 1/21/24.

The decorative pond, when complete, will double as a detention basin to temporarily store extra runoff from the newly widened Northpark roadbed and US59 feeder road during heavy storms.

Stormwater will collect between the pond’s normal water level and the surface of the ground, then drain slowly at a rate (constrained by the outfall pipe) that drainage ditches can safely handle.

Stormwater from 59 feeder road as well as Northpark will flow into ponds.

Why Ponds?

Traffic heading to 59 during an evacuation must not be trapped behind a flooded intersection at the freeway. Likewise, overflowing ditches must not flood homes and businesses in the area. Hence, the need for stormwater detention capacity.

The basins/ponds will also serve as decorative attractions that welcome people to Kingwood, exactly like they do at Kingwood Drive.

Contractors will build one pond on each side Northpark. Culvert that runs under Northpark will connect the ponds and carry overflow from the south pond to north pond.

Overflow from the ponds will then drain east toward Loop 494, under the railroad tracks, and behind the businesses on the north side of Northpark.

What to Expect in Coming Weeks

In coming weeks, contractors will complete the outline of the ponds. But, for now, they will only excavate down to the water table, according to project manager Ralph De Leon. Before contractors can go lower, they need a place to pump water as they dig. That means finishing the drainage-culvert connection(s) to Ditch One first. Ditch One leads to the Kingwood Diversion Ditch and Bens Branch farther east.

So the next steps will be:

  1. Place culvert in the easement between the north entry pond and Loop 494.
  2. Place culvert east of the railroad tracks that will connect to Ditch One.
  3. Connect both segments by tunneling under 494 and the UP Railroad tracks.

A satellite image clearly shows the entire route.

Northpark Drive drainage improvements

Here’s what it route looks like from a couple hundred feet.

Stormwater will travel from the entry ponds in the background at 59 via culvert in the easement (middle of the frame).
Then, the storm sewer will go under 494 (left) and the UP tracks before turning left and going behind two storage facilities.

In the pictures above and below, note the culvert already pre-positioned.

Behind Public Storage and Duncan Donuts, the storm drains will empty into Ditch One (top middle). Photo Oct. 2023.
Looking west. Water will flow through ditch toward the foreground behind Calvary Christian Fellowship (lower left).
Looking opposite direction from same location. Ditch One flows toward St. Martha Catholic Church (top center).

Just before reaching St. Martha Catholic Church, the water will turn right and cross under Northpark in either Bens Branch or the Kingwood Diversion Ditch.

Building from the Ground Up

De Leon emphasized that all underground work (drainage and utilities) must be completed before any road building can begin. The underground work still entails:

  • Building a second CenterPoint gas line on the north side of Northpark. CenterPoint will also build two connections to the first CenterPoint gas line on the south side. The first connection will be at Russell-Palmer Road and the second near Loop 494.
  • Relocating Entergy power lines and transformer.
  • Moving fiber-optic lines from internet and telecom companies.
  • Relocating a water line to Parkwood Baptist Church.
  • Finishing tree transplantation.
  • Tunneling storm drains under the railroad.

All of the above require permissions, permits and inter-local agreements with the City, Lake Houston Redevelopment Authority/TIRZ, utilities, and UP Railroad).

Three-Day Road Closure

At some future point, after those details are worked out, Northpark will have to close for three days. Previously, the plan had been to keep at least two lanes of traffic open in both directions at all times. So this represents a change. But any closure is still months away.

The closure will happen during construction of turn lanes under the bridge that will go over the UP Railroad Tracks.

UP intends to install a one-piece, 100-foot-long section of track and concrete that spans all ten lanes of traffic. The one-piece construction will involve multiple giant cranes. It will also mean shutting down rail traffic. But the final result will be a more stable track.

However, the one-piece construction also means alternate-side road closures are no longer a viable strategy.

Ideal Conditions for Tree Transplantation

The cool, wet weather during the winter months when trees are dormant makes ideal conditions for moving them. The trees should have a much higher survival rate now than during the drought and heat, as we experienced last summer.

For More Information

For more information about the project including construction plans, visit the project pages of the LHRA/Tirz 10 website. Or see these posts on ReduceFlooding:

Posted by Bob Rehak on 1/13/24

2336 Days since Hurricane Harvey

Excavation of Northpark Detention Basins Starts

Excavation of the decorative ponds that will double as Northpark detention basins at US59 began this week.

Contractors will stockpile the dirt in two places for now: behind Duncan Donuts and at a sand mine on Sorters-McClellan Road several blocks to the west. Contractors will use the dirt later to level the road surface and build access ramps for the bridge over the Union-Pacific Railroad tracks.

In other Northpark-expansion news this week, Entergy still has not started moving its utility poles and transformer.

However, CenterPoint has almost finished relocating its gas line under the road’s center drainage ditch to the south side of the road. CenterPoint also surveyed the north side of the street to place a second line there.

Finally, the Lake Houston Redevelopment Authority (LHRA) is close to finalizing a drainage agreement with the Union-Pacific Railroad. For more details, see below.

Beginning of Entry Pond Excavation

Contractors will excavate the entry ponds/detention basins in several stages. For now, they will excavate down to the water table. Later, they will excavate below the water table, pumping water into new storm sewers as they dig.

Then they will place a liner at the bottom of each pond.

Finally, the ponds will be filled to the level of the storm sewers with a combination of well- and rainwater. But that will come much later.

The distance between the top of water in the ponds and the surface of the ground will retain stormwater to help prevent flooding of the intersection during heavy rains.

The photos below were all taken on 1/13/2024.

Looking at beginning of excavation of north pond. US59 and feeder on left, Northpark on right.
Looking west toward US59 bridge. These contractors appear to be defining the margins of the pond. Note stakes.
Excavated dirt on right waiting for shipment to a stockpile. Note storm drain on left and the wet earth that indicates proximity to water table.

Bens Branch, which crosses under 59 farther north, often overflows and backs up toward the Northpark intersection. The pipe above will carry water into the pond instead, thus reducing flood risk.

Start of one stockpile behind Duncan Donuts and Public Storage.

Where the Dirt Will Go

The stockpiled dirt will eventually be used to level the roadway over box culverts (when installation is complete) and also to build up ramps for the bridge over the railroad tracks.

When contractors finish placing box culverts, the stockpiled dirt will help level the center of the roadway, which will contain two additional lanes of traffic – one going each direction.

The bed must be raised to the level of the manhole shown above.
Looking west toward 59. Power lines belong to Entergy. They must be moved back to approximately where the fire hydrant is now. Yellow/green flags indicate route of new CenterPoint gas line.

Moving the utility poles back will create room for turn lanes next to the bridge over the rail tracks. The turn lanes must be at ground level for traffic turning north or south onto Loop 494.

Project managers first asked Entergy to move its power lines 2020. The utility still has taken no action. Ditto for the transformer below located near the Exxon station at 59.

Entergy transformer in red circle must also be moved back to make way for additional turn lanes.

An Entergy consultant claimed the company needed 50 weeks to move the transformer above.

The City is reportedly considering legal action against Entergy because of construction delays.

Meanwhile, Entergy continues to promote its social responsibility, even as it holds up construction of the only all-weather evacuation route for 78,000 people.

Railroad Agreement Should Be Resolved by End of January

In the good-news department, the last remaining issue with UP will hopefully be resolved within a couple weeks, according to project manager Ralph De Leon. The Lake Houston Redevelopment Authority sought permission to tunnel stormwater under the UP tracks to Ditch One. The railroad company required no more than a quarter-inch displacement of the tracks. Engineers figured out way to do it by splitting the flow from one pipe through two smaller pipes.

The Agreement covers both the aerial easement over UP’s tracks for the bridge and the railroad’s acceptance of the Construction Plans. The stormwater drainage pipes under the tracks held up UP’s final approval of the plans. Now that that has been resolved, UPRR is ready to accept the plans.  

Approval by the City will occur in the form of an Ordinance adopted by City Council.

The City of Houston contributed $15.4 million to the Northpark Project. Here is the contract between the City and Lake Houston Redevelopment Authority.

For More Information

De Leon said, “Once the UP agreement is signed, and CenterPoint and Entergy relocate their utilities, we can start building roads. Residents should then see a significant increase in in construction activity.”

For more information about the project including construction plans, visit the project pages of the LHRA/Tirz 10 website. Or see these posts on ReduceFlooding:

Posted by Bob Rehak on 1/13/24

2328 Days since Hurricane Harvey