My River POV: Steve Metzler

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Steve Metzler stands inside one of the concrete pipes.

The “My River POV” series provides readers the opportunity to learn about the unique insight and experiences of the San Antonio River Authority (River Authority) staff and their connection to the San Antonio River in hopes of inspiring stewardship of area creeks and rivers.

Why do you appreciate working at the River Authority?

What I appreciate about this agency is that we have both the environmental science and engineering inputs at the table. These departments bring such different perspectives to a project and it’s a more holistic way of viewing things. We have an extraordinarily strong Environmental Sciences Department (ESD) at the River Authority. Our ESD team leads the way in terms of the work that they do throughout the state and there are many professionals that look to them for their expertise. The Freshwater Mussel Reintroduction Program is a big step in that direction, as well as the fish passage efforts.

A hand hold various sizes and different kinds of mussels

A few of the many cool and colorful native freshwater mussel species found in the San Antonio River.

At the same time, the expertise of our Engineering Team plays a crucial role in bringing these environmental initiatives to life. Their innovative approaches to sustainable infrastructure, flood risk management, and ecosystem restoration ensure that our projects are both technically sound and environmentally responsible. Whether it’s designing fish passages that reconnect aquatic habitats or implementing green stormwater infrastructure, their work is instrumental in turning conservation goals into reality. The collaboration between environmental science and engineering allows us to develop well-rounded, impactful solutions that benefit both our natural resources and the communities we serve. I really appreciate coming into an organization that already has such a fantastic reputation for this integrated approach.

What brought you to the River Authority?

I’ve been at the River Authority for just over a year. My career has always revolved around river authorities and water districts. Both the Trinity River Authority and Tarrant Regional Water District are workplaces that have heavily influenced my career, and I’m excited to take those experiences and bring them into my current work.

Steve Metzler stands next to the worlds largest gate valve in the world.

Standing next to the largest gate valve in the world that was used to transport water for East Texas to Fort Worth!

The spillway gates at Lake Livingston releasing Trinity River flood waters in 2020.

The spillway gates at Lake Livingston releasing Trinity River flood waters in 2020.

When the River Authority approached me with the opportunity to come and interview for this position, the leadership and the staff I met convinced me that this was the place I needed to be. Their enthusiasm and expertise just blew me away. Every week that I’ve been here seems like there is something that reminds me we made the absolutely perfect decision to leave North Texas behind and make South Texas our home.

Did you have any prior experiences with the San Antonio River?

Well, it’s kind of fortuitous. During one of my last classes at Texas A&M University, I went on a class field trip exploring the San Antonio River, including many River Authority facilities. Had I known all those years ago that I would be back here having such an influential role in operations and engineering, I would have done a double backflip! I feel like I am a better person for having collected those experiences and taken that long winding road to get here, but I got here. To get a chance to live out the rest of my adult life here has been a dream come true.

What is an upcoming project that you are excited about?

One big project right now focuses on constructed and managed wetlands. These wetlands both help with nutrient removal and function as a buffer for when they receive excessive floodwaters. They help to slow down the rain runoff, which brings the temperature of the stormwater down before it hits the river and reduces potential harm to the ecology of the river.

A constructed wetland along the Mission Reach of the San Antonio River Walk.

Right now, we are also focusing on conversations about “productive” flooding with our environmental scientists. Flooding is essential to certain species of fish and wildlife along the river that live in floodplains. For example, Alligator Gar need these floodplain areas to reproduce. If we remove all the floodplain, then we remove their habitat. So, we want to reduce the damaging and property threatening part of floods while keeping their ecological benefits.


About Steve Metzler, PE, CCM, PMP, Director of Water Resources

Steven Metzler

In January 2024, Steven became the Director of Water Resources at the San Antonio River Authority, where he supervises the Engineering and Environmental Sciences departments. Together, they are dedicated to monitoring, assessing, and enhancing water quality and flood mitigation efforts within the San Antonio River Basin.

Learn more about Steven and his role at the River Authority.

Related Articles

Alerts

Mission Reach Area Maintenance

Update (December 2025):
Crews will be moving south of Concepcion Park towards the baseball fields around the Mission Road area. The trail in this section will be closed the morning of Wednesday 12/10 and is expected to reopen the later next week. 

Work will also continue at the current location near mile marker 8.2 for the remainder of the week, where crews will be cleaning the area and hauling off chips and debris. This section of the trail will remain open

When: Beginning October 20, 2025 through Spring 2026
What: Crews will be performing stem-density removal and related vegetation maintenance along sections of the Mission Reach to help manage flood risk and protect surrounding infrastructure. Some trails or segments may be closed temporarily while work is underway.
Why: Removing excess stems that naturally establish along the river helps maintain stormwater conveyance, reduces flood risk, and protects public infrastructure while allowing grassland and native vegetation to recover and thrive.
What to expect:

  • Limited trail closures and intermittent work zones.
  • Crews and equipment working near the riverbanks during daytime hours.
  • Parking areas remain open, but visitors may see signage and temporary barriers.

Questions? Call the San Antonio River Authority at (210) 227-1373 or visit https://www.sariverauthority.org/services/river-health/ecosystems/.

Thank you for your patience while we keep the Mission Reach safe, clean, and enjoyable.

Stem Density work 12.10.2025-12.19.2025

Trail Closure – Mission Reach Area

The Acequia Park trailhead entrance at Probandt Street to the Bexar County Public Works Department building’s trailhead will be closed through December 23rd due to construction. We apologize for the inconvenience.

Trail Closure Alert – Calder Alley, San Pedro Creek

Maintenance work will be done in Calder Alley starting Wednesday, September 18, 2025.

  • Trails will remain open during this work.
  • One bench at a time will be temporarily barricaded while improvements are completed.
  • There may be occasional contractor pickups in the area.

We appreciate your patience as we continue to maintain and improve San Pedro Creek for all to enjoy!

SASPAMCO Paddling Trail

The SASPAMCO paddling trail is open from River Crossing Park to Helton Nature Park.
*Please Note: Paddling Trail from Helton Nature Park to HWY 97 is still closed due to blockages. 

SASPAMCO Paddling Trail Temporarily Closed

Staff have removed two large log jams just downstream of Helton Nature Park, keeping the southern portion of the SASPAMCO Paddling Trail temporarily closed. Staff are working to contact adjacent landowners to support a land-based removal solution.

Goliad Paddling Trail Alert

NOTICE: HWY 59 Landing Site Closed

Due to TxDOT construction on the HWY 59 Bridge, the HWY 59 landing site is closed until further notice. However, the Goliad Paddling Trail remains open, and paddlers can still access the river at the Riverdale, Ferry Street, and Goliad State Park landings.

Please plan accordingly and check back for updates.

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