Photo Credit: Dave Hensley

 

Data listed below wer collected through the Clean Rivers Program (CRP) unless stated otherwise.

* Not shown in map
TST- Data collected by Texas Stream Team
WPP- Data collected by Watershed Protection Plan

1. Cypress Creek at Jacobs Well

This site is at the perennial headwaters of Cypress Creek. The creek continues upstream of Jacobs Well, but this section is usually dry unless there is precipitation. Jacobs Well is an artesian spring. The Well is approximately 3 – 4 m wide and about 13 m deep. At the bottom of Jacobs Well is an entrance to an underwater network of caves that enters into the Hays Trinity Aquifer. The spring flow of Jacobs Well is around 1 – 3 cubic feet per second and is the major source of water in Cypress Creek. The surrounding area contains limestone boulders, and the riparian vegetation consists of cypress, junipers and live oaks. Jacob’s Well is part of a nature preserve and interpretive center.

Monitoring samples at Jacob’s Well are taken off of the concrete ledge on the well side.

Last four Quarters

DateFlow (CFS)DO (mg/L)E. coli
(MPN/
100 mL)
Days Since Rain
9/21/16115.5132
1/11/17176437
3/28/17166.1217
6/1/178.65.921

Seven Year Geomean (08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
6.0426.37880.324

Average of all collected data (Since 08/08/12)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
7.5096.04489.719
 

 

6. Cypress Creek at RR12

This site is located approximately one mile north of Wimberley, at the Leeway Cottages on Scudder Ln. Access to Cypress Creek at Leeway Cottages is private. Monitoring is performed upstream of the RR12 bridge.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
10/06/16157.66632
01/11/17179.32037
03/28/17167.82217
07/14/168.66.6521

Seven Year Geomean (08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
7.3345.83299.586

Average of all collected data (Since 02/27/03)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
6.9446.20680.565
 

 

7. Cypress Creek at Blue Hole

This site is located at The Blue Hole, a popular local swimming hole. The monitoring location is off of a dock along the creek bank. The water at this site is deep and clear. Cypress trees on both banks shade most of the creek. One side of the creek is a park that receives many visitors, especially during the summer. The other side of the creek is private property, and is undeveloped ranch land.

Last four quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
9/21/16116.35132
1/11/171786437
3/28/17167.6 12017
06/01/176.861201

Seven year geomean (08/28/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
6.1895.65668.789

Average of all collected data (Since 12/27/05)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
7.2865.55560.879
 

 

9. Cypress Creek at RR12 Downtown

GBRA monitors this CRP site on Cypress Creek. The site is located at the RR12 bridge in downtown Wimberley. Monitoring is located under the bridge.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
08/2/168.17.6480N/A
10/10/16178.7 260N/A
11/16/163128.5200N/A
01/9/1714 9.9650N/A

Seven Year Geomean (08/02/10-1/09/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
467.953401.852

Average of all Collected Data (03/17/98)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
24.6188.446273.571
 

 

11. Cypress Creek at Blanco River

This site is located on private property where Cypress Creek enters the Blanco River. Monitoring is done just upstream of the confluence, in the middle of the stream.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/21/16118.432032
01/11/17179.7240037
03/28/17168.512017
06/01/178.68.23401

Seven Year Geomean (08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
6.8208.671378.778

Average of all collected Date (08/08/02)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
12.5647.958273.106
 

 

12. Blanco River at Pioneer Town

This site is located downstream of a Low Water Crossing at Pioneer Town in Wimberley, TX. Pioneer Town is private property, but it is a popular swimming area for people who pay a fee. There are several houses along the riverfront at this location. The river downstream of the low water crossing is shallow, rocky, and swift.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/22/16827.25982
01/11/17809.5N/A37
03/28/171067.69617
06/01/171767.4831

Seven Year Geomean (08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
53.7028.709165.182

Average of All Collected Data
(Since 02/27/03)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
138.8868.124212.010
 

 

14. Blanco River at RR12

This site is located at the Blanco River, just downstream of the Ranch Road 12 bridge, leading to downtown Wimberley.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/21/16828.38282
01/11/17801032037
03/28/1714896217
06/01/17719631

Seven Year Geomean
(08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
61.8919.66475.757

Average of all collected date (Since 01/13/98)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
184.2068.909141.817
 

 

15. Blanco River at Deer Creek

This site is located on private property, where Deer Creek enters the Blanco River, downstream of the RR12 bridge. Monitoring is performed in the Blanco River, downstream of the Deer Creek confluence.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/21/16828.33282
01/11/17809.922037
03/28/1714895417
06/01/17768.91001

Average of all collected date (Since 09/21/16)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
96.59.025101.5

*The purpose of this site is to monitor the Wimberley Wastewater Project. In times when irrigation cannot occur, and on-site effluent storage capacity is full, the effluent would be discharged into Deer Creek, which empties into the Blanco River, just downstream of the Ranch Road 12 Bridge. The City of Wimberley would be authorized to discharge up to 75,000 gallons per day. It is important to note that discharges would generally be associated with wet periods when irrigation couldn’t occur and when the flow in the river would be significantly higher. In such cases, effluent flows would be 0.07 percent of the flow of the Blanco River and significantly diluted by the increased river flows. On an annual basis, it is estimated that effluent discharges would represent less than 0.002 percent of the flow of the Blanco River. The TCEQ establishes discharge limits that protect human health and the aquatic environment. The City is committed to producing a superior quality effluent, one that is likely better than what would be required by the TCEQ. The City intends to provide a high level of treatment of its wastewater, including primary, secondary, tertiary treatment, phosphorus removal, and disinfection. With that said, it is City’s intent to seek TCEQ approval of an effluent limit of 5 milligrams per liter (mg/L) of Biochemical Oxygen Demand (BOD), 5 mg/L total suspended solids (TSS), 2 mg/L ammonia-nitrogen (NH3), and .5 mg/L total phosphorus (TP). The effluent will be disinfected and would have less than 126 E. Coli units per 100 milliliter (ml) – a bacteria level within the acceptable limits for contact water recreation. The quality of water in the Blanco River varies depending on weather and flow conditions. In wet periods, when effluent discharge would likely occur, the River will be carrying storm water. Typically, urban storm water has a BOD level of at least 8 mg/L, 170 mg/L TSS, 0.8 mg.L NH3, 0.5 mg/L TP, and 21,000 fecal coliform colonies per 100 ml while agricultural runoff would have a TSS of 2,270 mg/L, 11.9 mg/L total Nitrogen, and 3.7 mg/L TP. With this in mind, the effluent discharged from the proposed wastewater system will be significantly better, in terms of water quality and impact on the environment, than typical storm water runoff. Due to the high level of treatment, the infrequent occurrence of discharges, and the volume of discharges compared to the flow in the Blanco River, adverse impacts to the aquatic ecology or contact recreation in the Blanco River are not anticipated.

 

 

16. Blanco River at CR 174

This site is located at a county road low water crossing. It is in a valley on the south bank of the Blanco River. There is some farmland and ranchland in this valley. On the north bank are several houses. Both banks are lined with cypress trees.

Last four quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/21/16828.33182
01/11/17809.810037
03/28/171489.12617
06/01/17768.9261

Seven Year Geomean
(08/25/10-06/01/17)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
54.1479.89654.788

Average of all collected data (Since 10/07/99)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
134.6779.162129.836
 

 

19. Blanco River at Fisher Store Rd

This site is located at the Blanco River, underneath the Fischer Store Road Bridge.

Last Four Quarters

DateFlow (CFS)DO (mg/L)E. coli (MPN/100 mL)Days Since Rain
09/21/16829.3382
01/11/17809.776337
03/28/171068.62717
06/01/17718.7251

Average of all collected data (Since 09/21/11)

Flow (CFS)DO (mg/L)E. coli (MPN/100 mL)
53.6749.15769.476