Jump to content

Recommended Posts

2 hours ago, Triton said:

It's for drainage.

The one theory I have for why they split the tunnels into two is that federal regulation probably has some rules when it comes to tunnel length and the requirement to build a ventilation system to take out vehicle exhaust. The price tag probably would have risen substantially if they made one long tunnel with those requirements as opposed to two smaller tunnels. On top of that, you probably also would have been required to build emergency exits every-so-often. Again, that's just a theory I have.

I think you are correct on the ventilation aspect.  I recall reading about such ventilation requirements regarding the below-grade segments in NHHIP. If a "tunnel" is more than x' feet long mechanical ventilation is required.

Found this:  

NFPA [National Fire Protection Association] 502 does not mandate that mechanical ventilation be provided in tunnels less than 1000 m (3280 ft.) long, but does require an engineering analysis be performed. Historically, for short tunnels, common practice is that they are not mechanically ventilated. However, societal awareness about the serious nature of fires in road tunnels, coupled with the development of NFPA 502, has led to a need to demonstrate quantitatively whether mechanical ventilation is needed. NFPA 502 states that emergency ventilation shall not be required in tunnels less than 3280 feet in length, where it can be shown by an engineering analysis that the level of safety provided by a mechanical ventilation system is equaled or exceeded by enhancing the means of egress or the use of natural ventilation

  • Like 5
Link to post
Share on other sites
  • Replies 381
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Eastern Glades was open to the public today.  It was kind of empty of people because it was raining, but I would imagine this will attract quite a crowd when the weather starts getting cooler.   Very

Memorial Park expansion by Marc longoria, on Flickr   Memorial Park expansion by Marc longoria, on Flickr   Memorial Park expansion by Marc longoria, on Flickr  

I biked through the park today and noticed that they have begun installing the pre-fabricated sections of the tunnel.  I think this is the east tunnel (the one closer to downtown). It is much bigger t

Posted Images

Great photos @hindesky and yep i went for an early morning pre easter brunch bike ride and so fun to see all the activity at the park and loop! 

and heck yes, this tunnel progress is so darn impressive and is looking amazing! cannot wait to see it finished! 

  • Like 3
Link to post
Share on other sites
20 minutes ago, thatguysly said:

Are they building a bridge over the water feature between the tunnels or will it be a culvert system? The rendering make me think culvert but that doesn't seem as hospitable to the ecosystem.

We only support land animals, not water ones.

  • Like 1
  • Haha 3
Link to post
Share on other sites
18 minutes ago, samagon said:

what about amphibians that don't want to go all the way around the land bridge?

They can shop at the GFR and take their chances after...

  • Like 1
Link to post
Share on other sites
  • 1 month later...
  • 3 weeks later...
  • 2 weeks later...

that new crushed gravel path for foot and bike traffic that replaces the old picnic lane road is super fun to ride on with it's curves and "in the middle of the woods" feel! 

It does kinda go a bit out of the way if you are in a hurry to get home like i was the other night haha...but yep it's awesome! 

  • Like 6
Link to post
Share on other sites

Went by this weekend, and its crazy to think this is actually happening and how quickly its moving. Like, every other week it seems they are making visible, substantial progress.

Are they going to put fences up or something on the sides of the land bridges? You know people are gonna accidentally let go of a dog, or someone is going to kick a ball real hard, or throw a disc too high and its going to go over. I was wondering that once I saw the height of the land bridge. 

Edited by X.R.
  • Like 6
Link to post
Share on other sites

 

edit: oh i see what you mean...some kind of fence at the edge of the bridge where it ends over the road/tunnel entrance...heck yeah, they better! I can just see exactly what you are saying happening! 

 

 

From what i knew the land bridges are open to everyone to cross and even have picnics on as i remember somewhere they spoke about how from the top of the land bridge you would be able to have great views of both downtown and uptown...

Edited by gene
  • Like 3
Link to post
Share on other sites

Someone is going to ruin it for the rest of us...and they will prob put some sort of fencing or barrier...I can see delinquents dropping objects on cars or doing some crazy stunts for a TikTok video.

  • Like 6
Link to post
Share on other sites
1 hour ago, Naviguessor said:

I've decided to believe that this is being designed by professionals who know what they are doing, know how to spot risks and know how to mitigate them.  It's the same people who decided not to populate the Eastern Glades lake with Crocodiles and chose crushed granite rather than crushed glass for the running trails.  

But remember, those same people have opted out of using kangaroos, elephants and koala bears!!!! How fun would that have been!!!???!!!??? so don't give them tooOoOoOooOOoo much credit...

  • Like 1
Link to post
Share on other sites
1 hour ago, wilcal said:

The land bridge I saw, I believe in Alberta, which is used exclusively by animals still had a fence on it I believe. Basically, I would count on a fence. 

So... you think you saw a land bridge and you think it might have been in Alberta and you think it might have had a fence?   Good to know.   🙄

https://www.canadiangeographic.ca/article/banffs-famed-wildlife-overpasses-turn-20-world-looks-canada-conservation-inspiration

The fencing (on both the bridges and the entire roadway) in Alberta, is there to eliminate deadly collisions between vehicles and wildlife (deadly for wildlife as well as humans).  Pretty different situation from the bridges being built in Memorial Park

My best guess is:  No fencing.  

I don't recall this video being posted here.  

Edited by Houston19514
  • Like 2
Link to post
Share on other sites
1 hour ago, Houston19514 said:

So... you think you saw a land bridge and you think it might have been in Alberta and you think it might have had a fence?   Good to know.   🙄

https://www.canadiangeographic.ca/article/banffs-famed-wildlife-overpasses-turn-20-world-looks-canada-conservation-inspiration

The fencing (on both the bridges and the entire roadway) in Alberta, is there to eliminate deadly collisions between vehicles and wildlife (deadly for wildlife as well as humans).  Pretty different situation from the bridges being built in Memorial Park

My best guess is:  No fencing.  

I don't recall this video being posted here.  

Hey, you found the exact bridge I remembered and it was exactly the way I thought it was. Nice work!

Memorial Park has mentioned that the land bridge is designed to be used by animals to avoid having to cross Memorial Drive. 

I'll argue that I'm guessing a certain % of Memorial Park users are dumber than the average wildlife.

That video shows it with a raised concrete edge at some points and a flush edge at others. 

Edited by wilcal
Link to post
Share on other sites
14 hours ago, Pumapayam said:

Someone is going to ruin it for the rest of us...and they will prob put some sort of fencing or barrier...I can see delinquents dropping objects on cars or doing some crazy stunts for a TikTok video.

Wait a second, did nobody acknowledge Puma's return to the HAIF? Welcome back.

  • Like 4
  • Haha 1
Link to post
Share on other sites

Y'all get into some strange specifics sometimes. Wow look at that crazy land bridge.....wait where is the railing, oh you know someone is going to muck that up!

There will more than likely be a railing. Obvious can't confirm as I'm not on this project, but my professional opinion would say, yes indeed due to code reasons on multiple fronts, its also above a busy rode you will see a railing, and given what I've seen the design packets floating around they will probably make it flow seamlessly with the design. Only thing I don't know is if one would be able to walk up to it. I imagine the edges around and up to the pinnacle of the bridge will be extensively landscaped.

  • Like 2
Link to post
Share on other sites
  • 2 weeks later...
On 6/15/2021 at 11:58 AM, wilcal said:

Hey, you found the exact bridge I remembered and it was exactly the way I thought it was. Nice work!

Memorial Park has mentioned that the land bridge is designed to be used by animals to avoid having to cross Memorial Drive. 

I'll argue that I'm guessing a certain % of Memorial Park users are dumber than the average wildlife.

That video shows it with a raised concrete edge at some points and a flush edge at others. 

I agree that humans are capable of doing stupid things.
They've done them before. There was that horrifying incident on the Southwest Freeway a few years ago when someone lobbed a large rock off an overpass. The young mother whose car it hit was killed. 
OTOH, look at how many pedestrian overpasses cross Houston highways already. Many have no barriers in place to prevent mischief-makers from doing the same thing. Fortunately, very few take advantage of this opportunity, and I don't see why the overpass at Memorial Park would somehow be more of a temptation than those that already exist.

  • Like 2
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...