Projects

The River Authority manages and completes projects under a wide range of activities including scientific studies, park improvements, major infrastructure initiatives for flood control, stormwater management and community amenities. Funding for these projects comes from various sources. The River Authority contributes funding specifically towards projects; however, the majority of funding comes from other entities, notably the City of San Antonio and Bexar County. Funding through federal, state and local grants also helps the River Authority support its mission.

A project is a temporary endeavor undertaken to create a unique product, service, or result that meets a specific objective. A Project’s cost threshold is $75,000 or greater and has a duration of one year or longer. Projects require Board of Director approval. All projects are entered into the River Authority’s project management software system and are managed in a consistent fashion.

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River Authority Projects

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Bexar County Capital Improvements program photo

Bexar County Creeks and Trails Program

This program is a multi-year initiative managed by the River Authority to enhance both natural and community infrastructure throughout Bexar County. Building on prior capital…
Sheridan Building Proposed Rendering

Facilities Design & Construction

This project involves the planning, design, and construction of a new facility at 201 W. Sheridan, aimed at supporting the River Authority's long-term operational and…
Westside Creeks Restoration Project

Westside Creeks Ecosystem Restoration Project

The Westside Creeks Project is a community-based creek restoration effort started in 2008 by the San Antonio River Authority. Its mission is: 1) to develop…
Near River Road

River Road Restoration

In an effort to restore and sustain the native life in this section of the river, Bexar County, the City of San Antonio, the River…
Escondido Creek Parkway Splash Pad

Escondido Creek Parkway

With its lush vegetation, effortless accessibility and modern recreation amenities, Escondido Creek Parkway is the new favorite outdoor hub in the City of Kenedy, a…

Culebra Creek Trail Extension

This project continues trail improvements along Culebra Creek as part of the Howard W. Peak Greenway Trails System, extending from the Grissom Trailhead to the…

Culebra – Helotes Connector Trail

This project continues trail improvements along Culebra Creek as part of the Howard W. Peak Greenway Trails System, extending from Grissom Road to the Culebra-Helotes…

Zarzamora Creek Trail Extension (CoSA Bond)

This project continues trail improvements along Zarzamora Creek as part of the Howard W. Peak Greenway Trails System, extending from Ingram Road downstream to Tierra…

Leon Creek Trail Connection to Rodriguez Park

This project continues trail improvements along the Leon Creek segment of the Howard W. Peak Greenway Trails System, beginning at the Military Drive trailhead at…

Leon Creek Trail Extension

This project continues trail improvements along the Leon Creek segment of the Howard W. Peak Greenway Trail System, extending from IH-35 downstream to Spicewood Park…

Spirit Reach

The Spirit Reach includes a series of trails to connect the existing reaches of the San Antonio River experience (San Antonio Missions, the Riverwalk, Pearl…

Zarzamora Trail

This project continues the trail improvements through the Howard W. Peak Greenway Trails System along Zarzamora Creek from Tierra Del Sol Park downstream to Alderete…

San Antonio Zoo Well

This project addresses the urgent need for a reliable water supply at the San Antonio Zoo, which currently relies on untreated well water from the…

Cibolo Creek Water Quality Model Updates

This project focuses on improving water quality in the 850-square-mile Cibolo Creek Watershed, which includes rapidly developing urban and rural areas. Several streams are impaired…

Upper Martinez WWTP Improvements

The project has completed the 30% design phase and associated condition assessments, confirming an average diverted daily flow of 1.11 Million Gallons per Day (MGD)…

Parks Design and Construction

This project involves the design and construction of River Authority owned nature-based parks along the Medina River and San Antonio River. It aims to expand…

NRCS Escondido Creek Site 12

Escondido 1 Dam currently passes 73% of the probable maximum flood (PMF), Escondido 4 Dam passes 59%, and Escondido 12 Dam passes 51%. Dams and…

NRCS Escondido Creek Site 4

Escondido 1 Dam currently passes 73% of the probable maximum flood (PMF), Escondido 4 Dam passes 59%, and Escondido 12 Dam passes 51%. Dams and…

NRCS Escondido Creek Site 1

The project will convert the existing Westside Creeks models to either a 1D/2D model or a full 2D model, and will analyze them using Future…

CTP FY22 Westside Creek FFRD

The project will convert the existing Westside Creeks models to either a 1D/2D model or a full 2D model, and will analyze them using Future…

Nature Based Solutions Program

This program invests in science, modeling, and master planning to identify and evaluate properties for Nature-based Solutions (NbS), creating a rolling pipeline of multi-year projects.…

Website Redevelopment

The Website Redesign Project will involve the redesign, development, and execution of web design services to include the external River Authority website, the internal employee…

CTP Risk MAP Lower SAR Watershed FY22

This project focuses on flood risk identification and assessment within the Lower San Antonio watershed. Activities include floodplain mapping, report generation, and development of a…

Escondido Creek Parkway Phase II

This project continues improvements to Escondido Creek Parkway by extending the trail from the 5th Street entrance to the elementary school, across the creek to…

Nueva Street Dam – Gate 5 Repair

The River Authority will provide the design and construction management of Gate 5 on behalf of the city of San Antonio (CoSA) Public Works Department…

Watershed Master Plan Atlas 14 Update

This project will incorporate updated flood risk data from Risk MAP and floodplain remapping efforts that reflect Atlas 14 precipitation estimates. It will update estimated…

Mission Reach Boundary Markers

The Mission Reach Boundary Markers project will clearly identify the property lines along the San Antonio Capital Improvement Project Phases (SACIP) enabling River Authority staff…

Martinez II-Upper Martinez Interconnect Line

This project will ensure that the outfall main between the Upper Martinez WWTP and the Martinez II WWTP can convey all the anticipated flow from…
Mussels recovered during a relocation event. Species include Yellow sandshell, Pistolgrip, Pimpleback, Threeridge, and Washboard.

Freshwater Mussel Reintroduction

This project supports the reintroduction of native mussels to the Mission Reach, where populations have been nearly eradicated but persist in remnant channels. Initiated in…

CTP Risk Map Lower SAR Watershed – FY21

The project focuses on flood data, including flood risk identification and assessment activities within the Lower San Antonio watershed. These activities include floodplain mapping, report…

GSI Broadway Alamo Heights

This project supports the City of Alamo Heights (City) with the design and installation of green stormwater infrastructure (GSI) along Broadway street in conjunction with…

Capacity Management Operations & Maintenance Program

The project creates a formalized Capacity, Management, Operation and Maintenance (CMOM) program for the Martinez and Salitrillo Wastewater collection systems. This project evaluates the current…

Roadway Collection System Projects

This ongoing project relocates and rehabilitates wastewater collection system lines in coordination with roadway improvement projects constructed by other public entities, such as the Texas…

Nueva Street Marina Dam Replacement

This project replaces the aging Nueva Street Marina Dam, originally installed in the mid-1980s, with a modern air-filled inflatable dam. Managed during flood events when…

Martinez IV WWTP Expansion

This project takes the Martinez IV wastewater treatment plant (WWTP) from a permitted capacity of 250,000 gallons per day (GPD) to 2.0 million gallons per…

Salitrillo WWTP Expansion and Improvements

The Salitrillo Wastewater Treatment Plant (WWTP) Expansion and Improvements project will expand the current WWTP from a permitted daily average flow of 5.83 million gallons…

Martinez IV Collection System CIP – Project 29

This project is for the design and construction of a large diameter gravity sewer line that will extend from Millican Drive to the Martinez IV…

City of San Antonio Bond GSI Match

This project is a cost-share initiative between the River Authority and the City of San Antonio to integrate green stormwater infrastructure (GSI) into 2017 City…

Facilities Acquisition and Improvements

This project oversees the completion of the facilities acquisition and improvements plan. In FY 2019-20 the River Authority acquired property located at 201 W. Sheridan…

Brooks City Base – Mission Reach Linkage Project

In partnership with the Brooks City Base Economic Development Corporation, the River Authority is managing a trail connection project between the Mission Reach Segment of…

Edwards Aquifer Watershed Protection

This project is managed and administered by the River Authority for the City of San Antonio’s Proposition 1-funded Edwards Aquifer Protection Program. It supports water…
San Pedro Creek Culture Park Mural: "From All Roads We Are One"

San Pedro Creek Culture Park

This project, led by Bexar County and the River Authority in coordination with the City of San Antonio, is transforming San Pedro Creek into a…

The Link-Preliminary Engineering Report

The Preliminary Engineering Report for the Link was completed in Q1 2024. The initial project funding supported exploring the feasibility of the Link Project through…

Martinez Creek Trail Extension

The Westside Creeks Restoration Project Conceptual Plan, adopted in June 2011 by the River Authority’s Board of Directors, has served as the catalyst for the…

Panther Springs Creek Restoration

The River Authority is collaborating with the City of San Antonio (CoSA) for the 2017-2022 Bond project Panther Springs Creek Restoration. The River Authority is…
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San Antonio River Tunnel

The San Antonio River flood diversion tunnel is approximately 16,200 feet long with precast concrete segmented liners of 24 feet by 4 inches inside diameter.…

Mission Reach Erosion Repairs

This project funds repairs to address erosion at various locations along the Mission Reach Segment of the San Antonio River. Erosion repair projects aim to…

Floodplain Remapping – Leon, Salado, & Medina Watersheds

This project will enhance the community's floodplain data through a restudy and updating of floodplain maps for Leon Creek, Salado Creek, and selected Medina River…

Espada Park

The River Authority, in partnership with Texas A&M San Antonio and TJ Maxx, is planning to connect the lower end of the Mission Reach to…

Museum Reach Electrical Infrastructure Upgrade

This project will bring better and safer lighting and additional electrical outlets to a portion of the Museum Reach Segment of the San Antonio River.…

CTP Risk Map Lower Cibolo/Medina – FY20

This project focuses on flood data, including flood risk identification and assessment activities within the Lower Cibolo Watershed and Lower Medina Watershed. These activities include…

Downstream Predictive Flood Modeling

The River Authority completed the predictive flood modeling system for Bexar County in 2021. The Downstream Predictive Flood Modeling project intends to extend the coverage…

Water Quality Model Tool Runs

This project develops a future condition model and updates priority subbasins with the latest watershed information. Priority subbasins are based on ultimate buildout land use…

Westside Creeks Lighting Pilot Project (CoSA Bond)

The Westside Creeks Lighting project will include lighting for three creeks to include Alazan, Zarzamora, and Apache Creeks. The lighting will be placed along the…

Martinez IV Expansion Phase II Design

This project will take the Martinez IV Wastewater Treatment Plant (WWTP) from a permitted capacity of 2.0 million gallons per day (MGD) to 5.1 MGD.…

Holistic Freshwater Mussel Project

Three freshwater mussel species under review for federal listing as threatened or endangered have historically been found in the San Antonio River Basin. One species,…

San Antonio River Authority Risk MAP

Through more accurate flood maps, risk assessment tools, and outreach support, FEMA's Risk Mapping Assessment, and Planning (Risk MAP) strengthens local ability to make informed…

Lower Leon Creek Use-Attainability Analysis

The objective of the Lower Leon Creek Use-Attainability Analysis is to conduct monitoring in support of Texas Commission on Environmental Quality efforts to assign the…

Panther Springs Creek Restoration

The San Antonio River Authority (River Authority) is collaborating with the City of San Antonio for the 2017-2022 Bond project Panther Springs Creek Restoration. The…

Floodplain Mapping

The San Antonio River Authority Floodplain Viewer engages users in an interactive floodplain map, displaying the Federal Emergency Management Agency’s (FEMA) National Flood Hazard Layer…

Rangia Clam Investigations

The adopted environmental flow standards developed by the Guadalupe, San Antonio, Mission, and Aransas Rivers and Mission, Copano, Aransas, and San Antonio Bays Basin and…

Environmental Flows Validation

The goal of this project was to develop methodologies to validate environmental flows adopted by the State. This was accomplished by first conducting a workshop…

USGS West Side Creeks Sediment Study

The Westside Creeks are a cluster of tributaries to the San Antonio River that flow through some of San Antonio’s oldest Westside neighborhoods – a…

San Antonio River Guadalupe Bass Project

This project assessed the abundance of Guadalupe Bass Micropterus treculi in the San Antonio River (SAR) watershed and collect, tag and reintroduce the species to…

Instream Flow Study of the Lower San Antonio River and Lower Cibolo Creek

In recent history, use of groundwater to sustain rapid development in the basin has resulted in increasing base flows in the San Antonio River resulting…

Instream Flows Study of the Lower San Antonio River and Lower Cibolo Creek – Interim Progress Report and Instream Flow Recommendations

In 2001, the 77th Texas Legislature enacted Senate Bill 2 establishing the Texas Instream Flows Program (TIFP). The purpose of this program is to perform…
2002_houston_to_lexington

Houston to Lexington

Completed in 2003, this $13M project was jointly funded by the City of San Antonio and Bexar County. Project design and construction was overseen by…
past-projects-old-espada_sm

Espada Dam and Davis Lake

Constructed as part of the federal San Antonio Channel Improvements Project (SACIP), the Espada Dam was designed and built to maintain a base flow to…

USGS Leon Creek Sediment Analysis

The Texas Department of Health has issued a fish consumption advisory stating that the consumption of fish from Leon Creek may pose a threat to…

USGS Baseline Study of Oil and gas Production Constituent Phase II Project

In Karnes and Wilson counties, the number of new oil and gas production wells has increased substantially since completion of the Phase I report. Few…

Upper San Antonio River TMDL Implementation Plan

A portion of the Upper San Antonio River, Segment 1911, has been identified by the Texas Commission on Environmental Quality (TCEQ) as impaired due to…

Texas Instream Flow Stakeholder Process Project

The Texas Instream Flow Program (TIFP), jointly administered by Texas Commission on Environmental Quality, Texas Parks and Wildlife Department, and Texas Water Development Board, has…
past-projects-spc-tunl-inlet-upstrm_sm

San Pedro Creek Tunnel

The San Pedro Creek flood diversion tunnel is approximately 6,000 feet long with a finished inside diameter of 24 feet, 4 inches lined with precast…
past-projects-sar-sanjuandam_sm

San Juan Pump Station and the Asylum and No Name Creek Channel Rectification Project

The San Antonio River was the focal point and life line of the early Spanish missionaries and colonists. The missions were in fact located in…

San Antonio / Salado Basin Implementation

Specified reaches of the Upper San Antonio (segment 1911) and Salado Creek (segment 1910) have been identified on the TCEQ 303 (d) list as not…
past-projects-sar_olmos-dam-3

Olmos Dam

Olmos Dam was originally constructed in 1925-1927 as part of the City of San Antonio’s early efforts to effectuate a flood control plan for San…

Linking Freshwater Inflows and Marsh Community Dynamics in San Antonio Bay to Whooping Cranes

From 2002 through 2009, faculty and students from the Department of Wildlife and Fisheries Sciences at Texas A&M University conducted field, laboratory, and modeling studies…

Leon Creek, Segment 1906 TMDL For dissolved Oxygen and Bacteria Impairments

The draft 2008 TCEQ 303(d) List (March 19, 2008) identified several assessment units in the Lower Leon Creek as being impaired based on the state's…
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Five Points Area Construction

This project was funded by the City of San Antonio and Bexar County. The project primary purpose was to protect and enhance the conveyance in…
past-projects-bend-sar-comrc-to-hou1

Commerce to Houston

Completed in 1998, this project stabilized and rebuilt the river channel section from Houston Street to Commerce where the channel slope drops dramatically from the…

Bacteriological Assessment of the Lower San Antonio River

Citizens in the lower portion of the San Antonio River Watershed have expressed concerns about bacteria levels in the San Antonio River and asked that…
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Arsenal Street Bridge and the Betterments III Project

The San Antonio River Betterments III Project—Durango Boulevard to Nueva Street was designed and administered by the Authority as part of a six phase project…
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19th Street Labyrinth Weir Dam

The labyrinth weir dam project was designed to replace an existing failing double gated structure built in 1973. The 2,000 foot-long labyrinth weir design was…

Alerts

Mission Reach Area Maintenance

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 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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