Water Management Plan
FSS/PPS No. 08.07
Issue No. 3
Effective Date: 2/27/2017
Next Review Date: 2/01/2019 (E2Y)
Sr. Reviewer: Director, Grounds and Waste Management Operations
- This policy describes water management and drought management guidelines for the various sources of water Texas State University uses.
WATER SUPPLIED BY THE CITY OF SAN MARCOS
- The university will comply with the Irrigation Conservation Plan for Texas State University dated March 1, 2013, where water is supplied by the City of San Marcos.
WATER PUMPED FROM THE EDWARDS AQUIFER
University withdrawals will not exceed the permitted water allotments from the Edwards Aquifer Authority (EAA).
The university will comply with the EAA Groundwater Conservation Plan and all applicable Industrial Best Management Practices (Ind BMP) as an industrial user of Edwards Aquifer water.
Ind BMP – 1 System Water Audits, Leak Detection and Repairs: Meters for potable water applications will be monitored. Water audits and leak detection inspections will be conducted and appropriate actions taken based on the results.
Ind BMP – 3 Sub-Metering: All landscape irrigation systems will be sub-metered and records of landscape water consumption will be maintained.
Ind BMP – 4 Landscape Conservation Programs: Grounds Operations will comply with the variance granted by EEA in 2004.
Ind BMP- 6 Athletic Field Conservation Programs: Campus Recreation and Athletics will comply with the variance granted by EAA in 2004.
Ind BMP – 8 Cooling Tower Conservation Program: Make-up water will be metered. The university will conduct regular inspections for leaks and malfunctions and appropriate actions will be taken based on the results. Cycling will be monitored with the goal to achieve six to eight cycles versus the standard five cycles.
Ind BMP – 9 Conservation Programs for Industrial Users: The university will pursue the following actions as funding allows:
recovery of thermal water used in the provision of steam and chilled water so as to maximize the amount of water that is reused in order to reduce the amount of fresh makeup water introduced into the systems;
monitor and control the use of water in all chiller plant cooling towers to minimize losses due to leakage, evaporation, and drift;
utilize cooling coils with higher delta T to improve the temperature differential thereby saving energy and reducing water requirements;
utilize high efficiency chillers at the chiller plants;
replace the boilers at the thermal plants with modern, energy and water efficient units;
repair or upgrade the thermal water infrastructure to replace leaking, broken, or poorly-insulated thermal lines and fittings to reduce water and energy losses;
monitor potable water and thermal water meters in academic buildings as well as residence halls and auxiliary buildings;
maintain water conservation initiatives implemented by the Department of Housing and Residential Life, Dining Services, Recreational Center, and Student Center to include:
tray-less service program in the four dining halls, thereby reducing the amount of water used in their dishwashing process;
waste pulper recycler at the Harris Dining Hall and Commons Dining Hall to reduce the use of dishwashing water and allow for the reuse of that water;
retrofit sink and shower faucet handles at the Recreational Center and Student Center to push-button faucets to reduce running water and water usage in restrooms and locker rooms;
utilize programmable irrigation systems at all sports and recreational fields that include rain or moisture sensors to shut off the system in the event of rain. The programs are monitored for effectiveness and set to cycle through the stations for pre-determined times on designated days; and
retrofit bathroom fixtures at residence halls with low flow shower heads, low flow commodes and urinals, and motion-activated water faucets.
DIVERSIONS FROM THE SAN MARCOS RIVER
Under TCEQ Certificates 18-3865 and 18-3866, Texas State’s total diversion rate from the headwaters of the San Marcos River for consumptive use is limited to 8.1cfs (see Section 2.5.5 of the Edwards Aquifer Habitat Conservation Plan). The total diversion rate from Spring Lake is limited to 4.88cfs and the total diversion rate from the San Marcos River at Sewell Park is limited to 3.22cfs (see Section 220.127.116.11 and 18.104.22.168, respectively, of the Edwards Aquifer Recovery Implementation Program Habitat Conservation Plan of December 2011) for a total of 8.1cfs.To minimize the impacts of these diversions, when flow at the USGS gauge at the University Bridge falls below 80cfs, Texas State will reduce the total rate of surface water diversion by 2cfs (i.e., to a total of approximately 6.1cfs).
This reduction in pumping will occur at the pump just below Spring Lake Dam in order to maximize the benefits to salamanders, Texas wild-rice, and other aquatic resources in the San Marcos River below Spring Lake Dam. The university will reduce the total rate of surface water diversion by an additional 2cfs when the USGS gauge falls below 60cfs. The additional 2cfs reduction will be achieved at the pumps located in the slough arm of Spring Lake and, therefore, maximize the benefits to the aquatic resources within the main stem of the San Marcos River below Spring Lake Dam. When the USGS gauge falls below 49cfs, Texas State will reduce the total diversion rate to 1.0cfs. This further reduction will be achieved by restricting the pumps located in Sewell Park. The diversion of water will be suspended when the spring flow falls below 45cfs. Texas State’s total diversion rates for consumptive use are summarized below.
Streamflow (cfs) Spring Lake Diversions (cfs)
Cert. No. 18-3865
San Marcos River Diversions (cfs)
Cert. No. 18-3866
Total Diversion Rate (cfs) >80 4.9 3.2 8.1 80 - 60 2.9 3.2 6.1 60 - 49 0.9 3.2 4.1 49-45 1.0 0 1.0 >45 0 0 0
REVIEWERS OF THIS PPS
Reviewers of this PPS include the following:
Position Date Director, Grounds and Waste Management Operations February 1 E2Y
This PPS has been reviewed by the following individuals in their official capacities and represents Texas State Finance and Support Services policy and procedure from the date of this document until superseded.
Director, Grounds and Waste Management Operations; senior reviewer of this PPS
Associate Vice President for Facilities
Vice President for Finance and Support Services