Springs Reports

The following reports are published by external entities and include information about the San Marcos Springs, San Marcos River and Edwards Aquifer.

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Date	Title	Author
Date 2023	Title Biogeography of Selected Spring Endemics in Texas Interglacial‑Drought Refugia with Unexpected Insights from a Spring‑Dependent Nematode Parasite	Author Mclean L. D. Worsham , Alan Bond, James Randy Gibson, and David G. Huffman
Date 2017	Title EAA 2016 Water Quality Summary	Author EAA
Date 2017	Title EAA Hydrologic Data Report 2016 Discharge	Author EAA
Date 2013	Title Underwater Geoarchaeology at Spring Lake, San Marcos, Texas	Author Hooge, Jacob
Date 2013	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2012 Annual Report	Author BIO-WEST Inc
Date 2012	Title Tracing Groundwater Flowpaths in the Vicinity of San Marcos Springs, Texas	Author S Johnson, G Schindel, G Veni, N Hauwert, B Hunt, B Smith, & M Gary
Date 2012	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2011 Annual Report	Author BIO-WEST Inc
Date 2011	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2010 Annual Report	Author BIO-WEST Inc
Date 2010	Title Final Report for Deep Aquifer Biota Study of the Edwards Aquifer	Author Zara Environmental LLC
Date 2010	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2009 Annual Report	Author BIO-WEST Inc
Date 2009	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2008 Annual Report	Author BIO-WEST Inc
Date 2008	Title Survey and Distribution of Invertebrates from Selected Springs of the Edwards Aquifer in Comal and Hays Counties, Texas	Author James R. Gibson, Scott J. Harden and Joe N. Fries
Date 2008	Title Evaluation of the Option to Designate a Separate San Marcos Pool for Critical Period Management	Author SB Johnson & GM Schindel
Date 2008	Title Simulated Impacts Associated with the Cibolo Creek Transfers Using MODFLOW-NR and Senate Bill 3 Assumptions	Author LBG-Guyton Associates
Date 2008	Title Recharge and Recirculation / Edwards Aquifer Optimization Program Phase III / IV Report Final	Author Todd Engineers
Date 2008	Title Variable Flow Study - Seven Years of Monitoring and Applied Research	Author Gary MO, Gary RH & Asquith WH
Date 2008	Title Streamflow Conditions in the Guadalupe River Basin, South-Central Texas, Water Years 1987-2006-An Assessment of Streamflow Gains and Losses and Relative Contribution of Major Springs to Streamflow	Author Ockerman DJ & Slattery RN
Date 2008	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2007 Annual Report	Author BIO-WEST Inc
Date 2007	Title Variable Flow Study - Seven Years of Monitoring and Applied Research	Author T Arsuffi et al
Date 2007	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2006 Annual Report	Author BIO-WEST Inc
Date 2006	Title Summary of 2005 Groundwater Dye Tracing, Barton Springs Segment of the Edwards Aquifer, Hays and Travis Counties, Central Texas	Author Hunt, B. B., B. A. Smith, J. Beery, D. A. Johns, & N. M. Hauwert
Date 2006	Title Edwards Aquifer Authority Hydrologic Data Report for 2005	Author Hamilton M, Johnson S, Mireles J, Esquilin R, Burgoon C, Luevano G, Gregory D, Gloyd R, Sterzenback J, Mendoza R, & Schindel GM
Date 2006	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2005 Annual Report	Author BIO-WEST Inc
Date 2006	Title Final report as required by the Endangered Species Program, Texas: grant no. E-38-HP: endangered and threatened species conservation: habitat conservation planning for the development of the Edwards Aquifer Authority habitat conservation plan	Author Bob Hall (Edwards Aquifer Authority)
Date 2005	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2004 Annual Report	Author BIO-WEST Inc
Date 2005	Title Analysis of Recharge and Recirculation Edwards Aquifer Phase 2	Author Todd Engineers
Date 2005	Title Diversion Spring Cave	Author Krejca JK
Date 2005	Title Habitat conservation planning for development of the Edwards Aquifer Authority Habitat Conservation Plan: grant no. E-38-HP: grant program, Section 6 habitat conservation plan planning assistance	Author Bob Hall (Edwards Aquifer Authority)
Date 2004	Title Analysis of Recharge and Recirculation Edwards Aquifer Phase 1	Author Todd Engineers
Date 2004	Title Evaluation of Augmentation Methodologies in Support of In-Situ Refugia at Comal and San Marcos Springs, Texas	Author LBG-Guyton Associates, BIO-WEST, Inc., Espey Consultants, Inc. & URS Corp
Date 2004	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2003 Annual Report	Author BIO-WEST Inc
Date 2004	Title Aquatic Vegetation Laboratory Study: Phase 1: Observations of water quality changes and plant growth under various flows. Phase 2: Effects of carbon dioxide level on aquatic plants found in the Comal and San Marcos Springs/River Ecosystems. Final Report Variable Flow Study: Project 802, Task 27 San Marcos National Fish Hatchery & Technology Center, San Marcos, Texas	Author BIO-WEST Inc
Date 2003	Title Archaeological Testing of the Burleson Homestead at 41HY37 Hays County, Texas	Author Bousman, C. Britt & David L. Nickels
Date 2003	Title Conduits and Turbulent Flow in the Edwards Aquifer	Author Steve Worthington
Date 2003	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2002 Annual Report	Author BIO-WEST Inc
Date 2002	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2001 Annual Report	Author BIO-WEST Inc
Date 2002	Title Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2001 Annual Report Appendix C: Drop Net Raw Data	Author BIO-WEST Inc
Date 2001	Title Water Quality/Variable Flow Study Summary of Fall Quarterly Sampling San Marcos River, San Marcos, Texas October 24-November 2, 2000	Author PBS&J
Date 2001	Title Edwards Aquifer Hydrogeologic Report for 2000	Author Esquilin R, Lillibridge BC, Mahula DM, Mireles J, Hoyt JR & Schindel G
Date 2001	Title A Statistical Study of the Hydrological Character of the Edwards Aquifer	Author Tomasko D, Fisher A-M, Williams GP & Pentecost ED (Argonne National Laboratory)
Date 2000	Title Appendix B A Report Investigating Impacts of Aquifer Pumping Limits on Flow of Comal Springs and San Marcos Springs	Author LBG-Guyton Associates
Date 1999	Title Optimization Technical Studies in Support of the Edwards Aquifer Optimization Program	Author Todd Engineers
Date 1996	Title Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 4	Author HDR Engineering Inc, Paul Price Associates Inc, LBG-Guyton Associates, Espey-Huston & Associates, Inc & HB Zachry Company , San Antonio River Authority, San Antonio Water System, Edwards Underground Water District, Guadalupe-Blanco River Authority, Lowe
Date 1995	Title Springflow Augmentation of Comal Springs and San Marcos Springs, Texas: Phase I - Feasibility Study	Author McKinney, Daene C., & Sharp, John M.
Date 1995	Title Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop, Hays County, Texas	Author Hanson JA & Small TA
Date 1994	Title Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 1	Author HDR Engineering Inc, Paul Price Associates Inc, LBG-Guyton Associates & Espey-Huston & Associates, Inc, San Antonio River Authority, San Antonio Water System, Edwards Underground Water District, Guadalupe-Blanco River Authority, Bexar Metropolitan Water
Date 1994	Title Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 2	Author HDR Engineering Inc, Paul Price Associates Inc, LBG-Guyton Associates & Espey-Huston & Associates Inc, San Antonio River Authority, San Antonio Water System, Edwards Underground Water Distric, Guadalupe-Blanco River Authority, Bexar Metropolitan Water
Date 1994	Title Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 3	Author HDR Engineering Inc, Paul Price Associates Inc, LBG-Guyton Associates & Espey-Huston & Associates, Inc , San Antonio River Authority, San Antonio Water System, Edwards Underground Water District, Guadalupe-Blanco River Authority, Lower Colorado River Authority
Date 1994	Title Edwards Aquifer Ground-Water Divides Assessment, San Antonio Region, Texas	Author LBG-Guyton Associates
Date 1992	Title Investigation of the Fresh/Saline Water Interface in the Edwards Aquifer in New Braunfels and San Marcos, Texas - Report	Author Poteet D, Collier H & Maclay R
Date 1990	Title Edwards Underground Water District, San Marcos Testing, Hays County, Texas	Author J Garber & WD Driver
Date 1988	Title Regional Water Resources Plan for the Edwards Aquifer	Author City of San Antonio and Edwards Underground Water District
Date 1986	Title Hydrochemistry of the Comal, Hueco, and San Marcos Springs, Edwards Aquifer, Texas	Author Ogden, A. E., Quick, R. A., Rothermel
Date 1981	Title Springs of Texas	Author Brune, Gunnar
Date 1979	Title Geohydrology of Comal, San Marcos, and Hueco Springs	Author Guyton, W.F., & Associates
Date 1978	Title Status of Satan Eurystomus Hubbs and Bailey, The Widemouth Blindcat	Author Longley, Glenn, & Karnei, Henry Jr
Date 1978	Title Status of Trogloglanis Pattersoni Eigenmann, The Toothless Blindcat	Author Longley, Glenn, & Karnei, Henry Jr.,
Date 1975	Title Major and Historical Springs of Texas	Author Brune, Gunnar