The objective of the Oklahoma Comprehensive Water Plan is to ensure a dependable water supply for all Oklahomans through integrated and coordinated water resources planning by providing the information necessary for water providers, policy-makers, and end users to make informed decisions concerning the use and management of Oklahoma’s water resources. This study, managed and executed by the Oklahoma Water Resources Board under its authority to update the Oklahoma Comprehensive Water Plan, was funded jointly through monies generously provided by the Oklahoma State Legislature and the federal government through cooperative agreements with the U.S. Army Corps of Engineers and Bureau of Reclamation. The online version of this 2012 OCWP Watershed Planning Region Report (Version 1.1) includes figures that have been updated since distribution of the original printed version. Revisions herein primarily pertain to the seasonality (i.e., the percent of total annual demand distributed by month) of Crop Irrigation demand. While the annual water demand remains unchanged, the timing and magnitude of projected gaps and depletions have been modified in some basins. The online version may also include other additional or updated data and information since the original version was printed. Oklahoma Comprehensive Water Plan Panhandle Watershed Planning Region Contents Introduction . 1 Water Supply Options . .30 Basin Summaries and Data & Analysis . 35 Regional Overview . 1 Limitations Analysis . 30 Basin 52 . 35 Panhandle Regional Summary . 2 Primary Options . 30 Basin 53 . 45 Synopsis . 2 Demand Management . 30 Basin 54 . 55 Water Resources & Limitations . 2 Out-of-Basin Supplies . 30 Basin 55 . 65 Water Supply Options . 4 Reservoir Use . 30 Basin 65 . 75 Water Supply . 6 Increasing Reliance on Surface Water . 31. Basin 66 . 85 Physical Water Availability . 6 Increasing Reliance on Groundwater . 31 Glossary . .94 Surface Water Resources . 6 Expanded Options . 31 Sources . 100 Groundwater Resources . 9 Expanded Conservation Measures . .31 . Permit Availability . 11 Artificial Aquifer Recharge . 31 Water Quality . 12 Marginal Quality Water Sources . 31 Water Demand . .20 . Potential Reservoir Development . 31 Public Water Providers . 22 Statewide OCWP Watershed Planning Region and Basin Delineation Introduction The Oklahoma Comprehensive Water Plan gage at or near the basin outlet (downstream (OCWP) was originally developed in 1980 and boundary), where practical. To facilitate Regional Overview last updated in 1995. With the specific objective consideration of regional supply challenges and The Panhandle Watershed Planning Region includes six basins (numbered 52-55 of establishing a reliable supply of water for potential solutions, basins were aggregated into and 65-66 for reference). The region encompasses 9,426 square miles in northwest state users throughout at least the next 50 13 distinct Watershed Planning Regions. Oklahoma, spanning from the Panhandle counties of Cimarron, Texas, and Beaver, years, the current update represents the most and extending to the southeast through all of Harper County and portions of Woods, ambitious and intensive water planning effort This Watershed Planning Region report, one Woodward, Major, Blaine, Dewey, and Ellis Counties. ever undertaken by the state. The 2012 OCWP of 13 such documents prepared for the 2012 Update is guided by two ultimate goals: OCWP Update, presents elements of technical The region is in the Great Plains and Central Lowland physiography provinces. studies pertinent to the Panhandle Region. Cimarron, Texas, and Beaver Counties in the Panhandle are generally flat while the 1. Provide safe and dependable water supply Each regional report presents information from remainder of the region is characterized by rough terrain marked with high sand hills for all Oklahomans while improving the both a regional and multiple basin perspective, and deep erosion. The highest elevation in Oklahoma, Black Mesa Plateau, is found in economy and protecting the environment. including water supply/demand analysis the far northwestern corner of Cimarron County. results, forecasted water supply shortages, 2. Provide information so that water potential supply solutions and alternatives, and The climate is semi-arid in the Panhandle and sub-humid in the remainder of the region, providers, policy makers, and water users supporting technical information. with mean annual temperatures ranging from 54°F in the Panhandle to 60°F in the can make informed decisions concerning southeast corner of the region. Precipitation ranges from 16 inches in the west to 28 the use and management of Oklahoma’s inches in the southeast. Annual evaporation is significant, ranging from 56 to 64 inches. water resources. As a key foundation of OCWP technical The largest cities in the region include Woodward (2010 population of 12,051) and work, a computer-based analysis tool, Guymon (11,442). The greatest demand is from Crop Irrigation water use. In accordance with the goals, the 2012 OCWP “Oklahoma H2O,” was created to By 2060, this region is projected to have a total demand of 473,840 acre-feet per year Update has been developed under an innovative compare projected demands with physical (AFY), an increase of approximately 83,000 AFY (21%) from 2010. parallel-path approach: inclusive and dynamic supplies for each basin to identify areas public participation to build sound water policy of potential water shortages. complemented by detailed technical evaluations. and stakeholder groups for each demand documented in the OCWP Water Supply Permit Also unique to this update are studies Integral to the development of these reports sector. Surface water supply data for each of Availability Report. All supporting documentation conducted according to specific geographic was the Oklahoma H2O tool, a sophisticated the 82 basins is based on 58 years of publicly- can be found on the OWRB’s website. boundaries (watersheds) rather than political database and geographic information system available daily streamflow gage data collected boundaries (counties). This new strategy (GIS) based analysis tool created to compare by the USGS. Groundwater resources were involved dividing the state into 82 surface projected water demand to physical supplies characterized using previously-developed water basins for water supply availability in each of the 82 OCWP basins statewide. assessments of groundwater aquifer storage and analysis (see the OCWP Physical Water Supply Recognizing that water planning is not a static recharge rates. Availability Report). Existing watershed process but rather a dynamic one, this versatile boundaries were revised to include a United tool can be updated over time as new supply Additional and supporting information States Geological Survey (USGS) stream and demand data become available, and can be gathered during development of the 2012 OCWP used to evaluate a variety of “what-if” scenarios Update is provided in the OCWP Executive Report The primary factors in the determination at the basin level, such as a change in supply and various OCWP supplemental reports. Assessments of statewide physical water of reliable future water supplies are sources, demand, new reservoirs, and various other policy management scenarios. availability and potential shortages are further physical supplies, water rights, water documented in the OCWP Physical Water Supply quality, and infrastructure. Gaps and Primary inputs to the model include demand Availability Report. Statewide water demand depletions occur when demand exceeds projections for each decade through 2060, projection methods and results are detailed supply, and can be attributed to physical founded on widely-accepted methods and in the OCWP Water Demand Forecast Report. supply, water rights, infrastructure, or peer review of inputs and results by state and Permitting availability was evaluated based water quality constraints. federal agency staff, industry representatives, on the OWRB’s administrative protocol and Oklahoma Comprehensive Water Plan Panhandle Regional Report 1 Panhandle Regional Summary Synopsis Panhandle Region Demand Summary The Panhandle Watershed Planning Region relies primarily on bedrock groundwater Current Water Demand: 390,690 acre-feet/year (21% of state total) supplies from the Ogallala aquifer. Largest Demand Sector: Crop Irrigation (86% of regional total) It is anticipated that water users in the region will continue to rely on the Ogallala and minor aquifers to meet future demand. Current Supply Sources: 2% SW 7% Alluvial GW 91% Bedrock GW Surface water supplies will be typically insufficient to meet demand throughout the Projected Demand (2060): 473,840 acre-feet/year region. Growth (2010-2060): 83,150 acre-feet/year (21%) Groundwater storage depletions may lead to higher pumping costs, the need for deeper wells, and changes to well yields or water quality. Current and Projected Regional Water Demand Additional conservation could reduce surface water gaps, alluvial groundwater storage depletions, and bedrock groundwater storage depletions. Surface water alternatives, such as increased use of groundwater supplies and/ or development of small reservoirs, could eliminate gaps without major impacts to groundwater storage. Three basins (54, 55, and 66) within the region have been identified as “hot spots,” areas where more pronounced water supply availability issues are forecasted. (See “Regional and Statewide Opportunities and Solutions” in the OCWP Executive