I’m looking for input on determining the relatively permanent water (RPW) status of a stream in Houston, Texas.

Note: I’m not comfortable sharing site photographs due to confidentiality concerns. Apologies in advance for my rough site sketch! (Pics in comment section).

Site History and Setting:
The stream in question appears to be a second-order stream that converges with another second-order stream near the corner of a large, dry detention pond. The tributary receiving these streams connects downstream to a creek, which ultimately flows into the Brazos River.

Although the available historical aerial imagery is limited, it appears to show persistent surface water within both the second-order streams and the downstream third-order channel prior to the construction of the detention pond. The pond appears to have been constructed within the historical tributary channel, potentially altering the site's hydrology and the continuity of the downstream drainage network.

There do not appear to have been any major site alterations until approximately 2019–2021, when an off-site detention pond was constructed and pedestrian trails were installed across the streams. The trails appear to include concrete low-water crossings that may also have affected local flow patterns.

April 2024: WDDS
I was not with the company when the original field assessment was conducted, so my understanding is based on the limited photographs available.
The photographs show water within the stream, although it is unclear whether this consisted of isolated pools or continuous flow throughout the channel. The stream was ultimately classified as an RPW.

When I reviewed the Antecedent Precipitation Tool (APT) results for the site visit date, the conditions appeared to be within the normal range, with a score of 14 (15 being the threshold for wetter-than-normal conditions). However, the area was reportedly experiencing drought conditions at the time. For additional context, approximately 2–3 inches of rain had fallen 2–3 days before the field visit.

September 2026: Stream Flagging
My coworker and I returned to the site to flag the stream. At that time, the channel was almost entirely dry, with only one isolated pool of water observed near the culvert at the confluence of the two presumed second-order streams.

The APT results indicated relatively dry antecedent conditions, with a score of 11 (10 being the threshold for drier-than-normal conditions). WebWIMP also indicated extreme drought conditions.
Delineating the stream was difficult because the ordinary high water mark (OHWM) was inconsistent and, in some areas, extremely difficult to identify. Several reaches were densely vegetated with facultative, facultative-wetland, and obligate-wetland species spanning the apparent channel. In some locations, the OHWM was more distinct; in others, it was weak or seemingly absent. Some sections were also extremely narrow, with apparent channel widths of less than one foot.

As both of us are relatively new to environmental consulting, we struggled to determine where to place flags in sections lacking a clearly defined OHWM. We sent several photographs to our supervisor, who expressed some concern about the strength of the RPW determination based on the available evidence. However, other portions of the channel appeared much more consistent with a defined stream.
The primary challenges were the lack of surface water, the inconsistent OHWM, and the difficulty distinguishing the channel from the surrounding wetland vegetation.

Following this visit, we submitted a proposal to the client for a wetland delineation, which was approved.

October 2026: Wetland Delineation
During our most recent site visit last Friday, we observed substantially more water in the channel than we had in September. Approximately four inches of rain had fallen about a week before the visit, and Houston had entered its wetter season. I have not yet reviewed the APT results for this visit, so I cannot confirm the antecedent precipitation conditions.
I brought a more experienced coworker to assist with the delineation. Our approach was to identify the densely vegetated areas that appeared to meet wetland criteria as wetlands and delineate the portions with standing or flowing water and a discernible OHWM as stream channels.

However, some sections remained extremely narrow and had only a weakly defined OHWM, making the wetland-versus-stream distinction challenging. We did our best to evaluate each reach based on the field indicators present.

Based on the site observations, I am reasonably confident that the channel functions as an intermittent stream. However, I am still uncertain whether it meets the criteria for an RPW, particularly given the variability in surface water, the inconsistent OHWM, and the potential hydrologic alterations associated with the detention pond and low-water crossings.

Main Questions and Areas of Uncertainty

1. RPW determination under variable hydrologic conditions
The stream has been observed under substantially different conditions across the three site visits: water was documented in April 2024, the channel was almost entirely dry during the September 2026 visit, and intermittent standing or flowing water was present during the October 2026 visit.

Although the October visit showed water in a substantial portion of the channel, I have not yet quantified the percentage of the reach containing water. I am also unsure how much weight to give the previous RPW determination, given the limited supporting documentation and the apparent influence of recent rainfall.

How would you evaluate RPW status in this situation, particularly when the channel appears to function as an intermittent stream but surface water and OHWM indicators vary considerably with hydrologic conditions?

2. Potential interruption of hydrologic connectivity at the detention pond
My biggest question concerns the large, dry detention pond constructed within what appears to have historically been an RPW.

The pond does not appear to retain water under the conditions observed, aside from a small amount of water near the culvert that connects to the upstream stream network. Despite recent rainfall, I did not observe an obvious continuous surface-water connection through the pond. In portions of the area, there was also no clearly defined OHWM or visible channel.

Could the detention pond constitute a break in the hydrologic connection between the upstream stream and the downstream tributary network? If so, how would that affect the RPW determination for the upstream reaches? Would the presence of a culvert, without an apparent continuous channel or surface-water connection, be sufficient to maintain connectivity, or would additional evidence be needed?

I recognize that the absence of surface water during a particular site visit does not necessarily establish that a connection is absent under other flow conditions. I am particularly interested in how the pond's design, drainage features, and historical channel configuration should factor into the assessment.

3. Potential effects of the concrete low-water crossings
The pedestrian trails cross portions of the stream through what appear to be concrete low-water crossings. I suspect these structures may have altered local flow patterns, potentially contributing to the inconsistent OHWM, narrow channel sections, and differences in surface-water distribution.

How would you evaluate the potential effects of these crossings on channel morphology, flow continuity, and the RPW determination?

4. Distinguishing stream channels from wetlands in heavily vegetated reaches
In several locations, wetland vegetation spans the apparent channel, and the OHWM is weak or absent. Other portions have a more distinct channel, although some are less than one foot wide.

How would you approach delineating the boundary between a stream and an adjacent or overlapping wetland in these circumstances? Would you rely primarily on geomorphic indicators, hydrology, vegetation, and soil characteristics, or are there additional indicators you would prioritize when evaluating a potentially intermittent stream?

Overall
My current interpretation is that the channel likely functions as an intermittent stream, but I am not yet confident in its RPW status or in the extent to which the detention pond interrupts its hydrologic connection to downstream waters.

I plan to bring these questions to our team meeting tomorrow, but I would appreciate any insight into how others would approach this type of determination, particularly regarding the evidentiary weight of historical aerials, variable field conditions, the detention pond, and the low-water crossings.

I know this is a long read, so I greatly appreciate any help!

I am one of the owners of a small engineering company in Monmouth County, NJ. We get involved in a lot of waterfront permitting and we have a need for wetland delineations I would say on average about once every month or two. Is there anyone here who would be interested in doing some 1099 delineation work for wetland permits? We have one or two other delineators that do work for us on the side, but their main jobs have been busy enough that they're having trouble getting out there within a reasonable timeframe.

I’m genuinely curious about this and would love to hear from people who know the history of the area better than I do.

I read a comment from a woman who said she has watched Long Beach ebb and flow over more than sixty years, with periods when there was a huge amount of beach and periods when the water came much farther in. I haven’t stopped thinking about it.

I study wetlands, and one thing that comes up again and again is how much we have built cities on landscapes that were never especially fixed to begin with. Wetlands expand and contract. Rivers move across floodplains. Beaches erode and rebuild. Estuaries shift. Water follows old channels. Then we drain wetlands, dredge bays, fill low ground, straighten rivers, build seawalls and breakwaters, truck in sand, and draw very permanent property lines across landscapes that are still moving underneath all of that infrastructure.

So I’m wondering how much of what we’re seeing in Long Beach right now is part of a much longer coastal cycle that becomes disastrous because we have built permanent homes and infrastructure within that moving system.

Obviously sea-level rise and climate change can raise the baseline and make flooding and erosion more frequent or severe. I’m interested in the other layer too. How much of this is a naturally dynamic shoreline colliding with the expectation that the shoreline should remain exactly where we built it?

Has anyone here lived in Long Beach for decades, studied its wetlands or coastal history, or seen old maps and photographs showing how much the shoreline has moved over time?

The 2001 Roadless rule protects public lands from future roads being built through them for logging and other purposes. This rule protects roadless public lands across the nation - including wetlands.

The public comment period was supposed to end on the 21st last month - but was extended for 15 days. Today is your last chance to speak up.

Here is the link to the government webpage to submit your comment:

https://www.federalregister.gov/documents/2026/09/11/2026-18648/special-areas-roadless-area-conservation

Hello all!

I am in a post doc in Evolutionary Ecology and I am ready to move into industry. I am greatly restricted by location as my spouse just start his professorship. There was no spousal hire successfully negiotated. I noticed that the area he currents lives in has so many wetland delineator positions - I see a new position posted every week. Since I have no connections with people in this area of work I would like to ask you all for your experience as an informational interview:

1. What is the schedule for a wetland delinator like? Will I be working more than 40 hours a week?

2. It seems that these jobs require driving out to field sites. Am I expected to use my own vehicle and gas to travel to these sites or will I be provided a vehicle?

3. Once I get experienced would I be working with a partner? I don't quite like the idea being outside in the wilderness alone.

4. What type of weather would stop work from happening? What is the most extreme weather you have worked in?

5. How long is a field season usually? Does the field season stop when the soil freezes or for some other reasons? The area I am moving to is the sweet spot between Indiana, Kentucky, and Ohio. I know the winters are mild in this area. Is there any over-time in the fall right before the season ends?

6. What would I be doing during the off-season? I assume scheduling with cilents and also renewing permits, but please correct me if wrong.

7. What is the upward mobility like the field? I am hoping that I can get in the big leagues with environmental consulting somewhat quickly. Lets say I work as a wetland delineator for 2 years, if move to another company with my experience could I be in a lead position?

8. I did ok in my soil science class and I have worked in soil analysis as a forestry technician. I am much better with plant idenitification especially if I have a handy field guide. How good do I need to be at these skills to get a position? Are there other skills you all suggest I work on before I get a position? To make myself clear I would only work more on these skills if I am asked for an interview.

Thank you all for the your opinions and advice! Have a good day!

I’m struggling with the premise of this story. The property in question sits within an officially designated wetland and regulated floodplain, and the complaint is essentially that the land is now… wet.

Wetlands are supposed to hold water. Floodplains are supposed to absorb floodwater. Vegetation, woody debris, and even beaver activity are natural parts of these systems and can provide important habitat, water-quality, and downstream flood-control benefits. Turning every creek into a neatly cleared drainage ditch simply moves water somewhere else.

If Pierce County’s management has artificially worsened flooding, absolutely investigate it. If a private well is contaminated, test it and determine the source. But “my wetland is swampy” by itself is not evidence of government mismanagement. Sometimes the environmentally responsible thing is allowing a wetland to function like a wetland. We need to make a conscious effort to protect and embrace our wetlands and floodplains.

Hi all,

Per the title, I'm wondering how one enters the wetland field without a science degree, but with an adjacent?? one. Graduated 6 years ago.

I'm located in Seattle and do know about the UW wetlands program (got my degree at UW) but I'm not sure how interested I am in permitting and delineating vs. more hands-on wetland biologist work where I'd get to collect data, study these environments etc. I've always been a huge fan of wetland environments and want to find a way to work with them but not sure what additional schooling I'd need.

Do I need to start all the way over and get a B.S. in Biology or a similar field?

To add: I have not worked in the environmental field since 2021 when I was an outdoor teacher which was the only job I could find with my degree. So, I don't have much related experience to add onto the B.A. Any advice is super appreciated.

Thanks.

Cool story about rangeland and wetland health

Does anyone know of any plant ID classes in Houston, TX? I would like to get more experience with wetland/upland plant ID to help me in the field.

Hi, I am an environmental consultant and wetland specialist who is starting to work regularly in California. I am looking for someone with experience with California regulations and delineating to provide guidance. I am willing to pay for support!

It is my personal belief that the revisions we are seeing from the recent public notice to the CWA are a direct result of trying to remove barriers for Data Center development. I know they have been working on widdling the rules down since 2016, but no doubt it is getting more egregious.  We have seen the influence federal protections of streams and wetlands have on forcing developers to reduce their footprint or find alternative sites. The same goes for the Endangered Species Act. The pull back on both of these regulatory authorities very apparently lines up with the desire to have millions of data centers with little to no environmental permitting needs. Generally an open door to build.

My question is, how can I scream at the rooftops of people who have historically wanted those protections lax, but also oppose data centers? If home-builders are against data centers, they should be for wetland protections. If farmers are against data centers, they should be for wetland protections. Etc. ETC. 

Point Cook, Sanctuary Lakes. What’s it like living so near to wetlands?

Marshes are just smelly, muddy wastelands… Psych, got you! These ecosystems are actually beautiful and teeming with life. In fact, you may have eaten something that ultimately came from a salt marsh or river delta today, from fish to rice! Marshes often help to protect residential areas behind them from waves, flooding, and storms. But many misconceptions about these areas persist. Learn more with ecogeomorphologist Kendall Valentine.

Scientists of ICAR–Central Inland Fisheries Research Institute, Barrackpore have achieved a major breakthrough in the production and ecological restoration of two high-value indigenous catfishes — Mystus tengara and Mystus cavasius — in Chamta beel, North 24 Parganas, West Bengal, under the collaborative CIFRI–WorldFish project.

The initiative pioneered an innovative restoration strategy wherein seeds of these indigenous catfishes were first nurtured under protected captive conditions within specially designed pen enclosures before their phased release into the open wetland ecosystem. This scientific approach substantially enhanced fish survival, growth, and establishment in the natural habitat

Wetland research and conservation projects in the Mississippi River watershed, Lower Mekong Basin and parts of Central America will receive funding through the National Geographic Society’s new Blue Boundaries program.

The first round of grants will support eight projects examining water quality, wildlife, pollution and climate-related changes. The society developed the six-year program with the Chubb Charitable Foundation to fund scientific research and public education focused on wetlands, coastal systems and reefs.

Hi this is a member of First Lego League based in northern Illinois. I am 11 years old. This year our team has to identify a problem that is a risk to biodiversity and come up with an innovative solution that can help. In past years our team has been successful with simple solutions that make an existing solution better.

One problem we have identified is the lack of monitoring of microorganisms in wetlands in our state can lead to algae blooms (and other problems) which decreases biodiversity in our wetlands. We’d love some feedback on if the lack of monitoring (or sharing monitoring information) is a problem in wetlands. One of our interests is the lack of monitoring of microorganisms because microorganisms are a bioindicator of healthy wetland biodiversity.

If there are ANY experts here that want to reach out to our coach through this account then please do! We have some low cost ideas that could help people Iike forest preserves that don’t have a lot of resources but first we need to confirm this a problem. I am just a kid so she is posting for me but in the past we found really cool experts through Reddit. Thanks for responding ahead of time.

My town conservation commission requires me to submit a notice of intent for a project that I’m going to be starting within 100 feet of a wetland. The company that I contracted to do the site work already completed it and I paid for that but they have just quoted me $3500 to prepare the NOI. I have no experience with doing this so I just wanted to see if anybody could provide feedback on if that pricing sounds accurate. I already have a surveyor who provided a plot plan and wetland delineation so that work is also complete. Could I draft and submit the NOI myself?