POWDER/TONGUE AND NORTHEAST RIVER BASIN PLAN UPDATE LEVEL 1 STUDY MAY 2017

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1 POWDER/TONGUE AND NORTHEAST RIVER BASIN PLAN UPDATE LEVEL 1 STUDY MAY 2017

2 OUTLINE WYOMING WATER DEVELOPMENT RIVER BASIN PLANNING PROCESS POWDER/TONGUE RIVER AND NORTHEAST RIVER BASIN PLAN UPDATE Basin Surface Water Use Update Available Surface Water Determinatin Future Demand Prjects Watershed Fire Analysis Outline Basin Issues Develp Planning Strategies DISCUSSION

3 POWDER/TONGUE & NORTHEAST BASIN PLAN UPDATE STUDY AREA LARGE AREA COVERING MOST OF THE NORTHEAST QUARTER OF THE STATE 23,198 sq. miles r 14,846,646 Acres 7 DIFFERENT RIVER WATERSHEDS Little Bighrn, Tngue, Pwder, Little Missuri, Belle Furche, Cheyenne, Nibrara NUMEROUS MUNICIPALITIES Sheridan, Buffal, Gillette, Sundance, Newcastle, and Lusk 10 CONSERVATION DISTRICTS/NATURAL RESOURCE DISTRICTS Sheridan C, Lake DeSmet, Pwder River, Natrna Cunty, Campbell Cunty, Cnverse Cunty, Nibrara, Crk Cunty, Westn Cunty, Nrth Platte Valley

4 RIVER BASIN PLANNING PROCESS OVERVIEW DETERMINE HOW MUCH WATER IS AVAILABLE Rainfall and Runff Grundwater DETERMINE HOW MUCH WATER USED Dmestic Use Agricultural Use Industrial DETERMINE HOW MUCH WATER IS ALLOWED TO BE USED Outline Interstate Cmpacts fr dwnstream requirements IDENTIFY DEVELOPMENT OPPORTUNITIES OUTLINE PLANNING STRATEGIES

5 RIVER BASIN PLANNING PROCESS OVERVIEW

6 BASIN SURFACE WATER USE PROFILE UPDATE MUNICIPAL AND DOMESTIC USE INDUSTRIAL USE AGRICULTURAL USE STORAGE WATER USE RECREATIONAL AND ENVIRONMENTAL USE FOCUS: VERIFY, VALIDATE, AND UPDATE AVAILABLE DATA NEEDED FOR THE BASIN PLANS

7 BASIN SURFACE WATER USE PROFILE UPDATE MUNICIPAL AND DOMESTIC USE PT 5 municipalities using surface water: 6,084,219 gpd Water System Survey & persnal cmmunicatins Dmestic use primarily grundwater WYPDES Wastewater Returns PT 8 municipalities discharging t surface water: 4,757,436 gpd

8 BASIN SURFACE WATER USE PROFILE UPDATE INDUSTRIAL USE Water rights & persnal cmmunicatins PT rights nt yet develped, surface water use based n evapratin NE surface water use: Black Hills Pwer, 230 gpm surface water use PT surface water use: Rights nt yet develped, surface water use based n evapratin

9 BASIN SURFACE WATER USE PROFILE UPDATE INDUSTRIAL USE COAL MINING Primarily use grundwater fr peratins Required t impund surface runff until released frm bnd Dust suppressin and Stck pnds PT: 48,393 acres

10 BASIN SURFACE WATER USE PROFILE UPDATE AGRICULTURAL USE Updated irrigated lands frm WWDC 2007 Statewide Framewrk Water Plan Crp types frm Natinal Agricultural Statistics Service (NASS) fr crp type Grwing seasn precipitatin frm PRISM (Parameter-elevatin Regressins n Independent Slpes Mdel) Cnsumptive Use (CU) Water use f a well watered crp under ptimum grwing cnditins Maximum use f water by the specific crp with the given cnditins Estimated with PRISM precipitatin and Pchup et. al. CU (GIS kriging) Cnsumptive Irrigatin Requirement (CIR) Cnsumptive use minus precipitatin Irrigatin water required t fulfil the cnsumptive use f a crp Estimated with PRISM precipitatin and Pchup et. al. CIR (GIS kriging)

11 BASIN SURFACE WATER USE PROFILE UPDATE AGRICULTURAL USE CIR and CU Calculated fr 9 crps IRRIGATED ACRES NDOP, NAIP, and CIR PT: apprx. 169,628 acres 2015 IRRIGATED ACRES 2015 NAIP 4-band (CIR) PT: apprx. 156,655 acres

12 BASIN SURFACE WATER USE PROFILE UPDATE STORAGE WATER USE Significant Reservirs include 36 dams with a capacity >1000 acre feet 20 are lcated in the PT Basin Other reservirs include 708 dams with capacity f >50 but <1000 acre feet Larry E. Lewis, Develpment f an Evapratin Map fr the State f Wyming fr Purpses f Estimating Evapratin and Evaptranspiratin

13 BASIN SURFACE WATER USE PROFILE UPDATE ENVIRONMENTAL AND RECREATIONAL USE Hw d these uses interact with traditinal uses? Ecnmic Value f Uses using the Harvey Ecnmic Methd (2012) IDENTIFY AND MAP THE USES CATEGORIZE THE USES (PROTECTED, COMPLIMENTARY, OR COMPETING)

14 AVAILABLE SURFACE WATER DETERMINATION HOW MUCH WATER IS AVAILABLE FOR DEVELOPMENT OR MANAGEMENT OPPORTUNITIES? UPDATE EXISTING HYDROLOGIC MODELS Input 40 years f available data Mdeling Perid: MODEL INPUTS Streamflw data Precipitatin Data Diversin Data Irrigated Acres Fr Cnsumptive Use

15 DEMAND PROJECTIONS POPULATION PT BASIN 2045 PROJECTIONS Middle 54,290 (0.7%) High 66,240 (1.4%) SHERIDAN 2015 POPULATION (17,873) Lw 49,154 (0.4%) THE MIDDLE SCENARIO IS BASED ON THE WYOMING DEPARTMENT OF ADMINISTRATION AND INFORMATION (WDAI) PROJECTIONS THROUGH 2045 THE HIGH SCENARIO IS BASED ON THE AVERAGE ANNUAL GROWTH INCREMENT (PERSONS ADDED PER YEAR) FOR EACH COMMUNITY DURING THE COMMUNITY S THREE FASTEST GROWING DECADES BETWEEN 1960 AND SHERIDAN 2045 POPULATION (21,396) THE LOW SCENARIO ASSUMES THAT EACH COMMUNITY WILL GROW ONLY HALF AS MUCH AS PROJECTED IN THE WDAI FORECASTS.

16 DEMAND PROJECTIONS POPULATION 100,000 Preliminary Ppulatin Prjectins -- Pwder Tngue Basin 90,000 80,000 70,000 60,000 Middle High Lw 50,000 40,000 30,000 20,

17 DEMAND PROJECTIONS UPDATE RECREATIONAL WATER DEMANDS Bating, Campgrunds, Glf Curses, Fishing, Hunting, Skiing, Hiking, Histrical Sites & Unique/Irreplaceable Lands ENVIRONMENTAL WATER DEMANDS Instream Flws Aquatic Habitat Pririty Areas Rivers and Streams, Lakes Reservirs Cnservatin Easements Wetlands

18 DEMAND PROJECTIONS UPDATE

19 WATERSHED FIRE INFORMATION IDENTIFIED MUNICIPAL WATERSHEDS THAT RELIED ON SURFACE WATER FIGURE SHOWS LANDFIRE FIRE REGIME GROUP AND WATER SUPPLY RESERVOIR DRAINAGES. DEBRIS FLOW SEDIMENT VOLUME PREDICTION REGRESSION MODELS WERE USED TO DETERMINE WATERSHEDS MOST LIKELY TO BE IMPACTED BY WILDFIRE Reservir S (km 2 ) B (km 2 ) R (mm) V (km 3 ) Mass (lb) Mass (tn) Big Gse Park , Bighrn , Clud Peak , Crss Creek , Dme Lake , Dull Knife , Kearney Lake , Sawmill , Tie Hack , Twin Lakes , Willw Park ,535 41

20 Buffal Municipal Watershed Wildfire Hazard Mitigatin Assessment (BW-HMA) Hazard Analyses Wildfire Hazard FlamMap Fire Behavir Mdeling Pstfire Hydrlgic Hazard NOAA/USGS Debris Flw Mdels Identify Areas f Cncern Gemrphic Indicatrs Mitigatin Planning Priritizatin Hazard Infrastructure Operability Priritized Prject Lcatins Gal = target frest treatments t prtect water supply

21 Mitigatin Planning PRIORITIZE LOCATIONS Hazard Index Cmbines Wildfire and Pstfire Hydrlgic Assessments Operability Index Permitting/ Administrative Cnstraints Crucial Habitat Frest Access/ Frest Plan Cmbine Indices fr Pririty Matrix Index Rank Pririty Matrix Index frm 1 t 23 t get Final Rank

22 FUTURE WATER USE ISSUES AND TOPICS DESCRIBE ISSUES AFFECTING FUTURE USE OPPORTUNITIES Cmpact requirements Federal legislatin (ie ESA) and funding SURFACE WATER AND GROUNDWATER QUALITY CLIMATE Suitable surces CWA and SDWA Identify climatic indicatrs Make drught management recmmendatins CONSERVATION Lcally led effrts Future rehabilitatin needs WATERSHED PLANNING Summarize state and lcal plans

23 DEVELOP PLANNING STRATEGIES BUILD ON STAKEHOLDER AND PUBLIC PARTICIPATION EFFORTS WORK WITH WWDO TO IDENTIFY AND REFINE STRATEGIES Integrate with the initiatives in the Gvernrs Wyming Water Strategy Water Management Water Develpment Water Cnservatin and Prtectin Water and Watershed Restratin Integrate strategies with pririties that have been identified by WWDC Level I and II studies and Level III cnstructin prjects Integrate with Interstate Decrees and Divisin II f the SEO Develp strategies f hw t manage data and data frmats t incrprate past and future frmats int future data management Systems

24 2002 PLAN OPPORTUNITIES AND COMPLETED PROJECTS 45 PROJECTS IDENTIFIED IN THE 2002 PLAN REVIEWED PUBLISHED REPORTS, DOCUMENTS AND DATA FROM 2002 TO 2017 MANY PROJECTS WERE EVALUATED AND/OR HAVE MOVED ON TO CONSTRUCTION 1 WWDC watershed study has been cmpleted 8 municipal water studies have been cmpleted 3 irrigatin district strage/cnveyance studies 15 LEVEL III CONSTRUCTION PROJECTS COMPLETED 3 in the Clear Creek, 11 in the Tngue, and 1 in the Pwder River basins Prjects develped r rehabilitated municipal water supply with an expenditure f $23 millin 6 UPLAND WATER PROJECTS COMPLETED Spnsred by a Cnservatin District and funded thrugh the WWDC Small Water Prject Prgram (SWPP) An estimated $75,000 was expended n thse 6 SWPP prjects and treated ver 70,000 acres

25 PROJECT SCHEDULE BASIN PLAN OPEN HOUSES: JULY AND AUGUST 2017 DRAFT FINAL REPORT TO WWDO: JULY 2017 PROJECT COMPLETION: SEPTEMBER 2017

26 THANK YOU!

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28 2002 TONGUE EXAMPLE

29 BASIN SURFACE WATER USE PROFILE UPDATE

30 AVAILABLE SURFACE WATER DETERMINATION MODEL METHODS Estimate Flw and Runff Rates frm HUC-12 Watersheds Estimate virgin flws in stream prir t use requirements Evaluate Streamflw by Selecting indicatr streamflw gages Determine which years classify as average, wet, r dry fr each climate statin. Estimate Cnsumptive Use Cnsumptive Irrigatin Requirement by crp type Weight Cnsumptive Irrigatin Requirement by sub-basin by distributin f crps grwing in that area Use weighted Cnsumptive Irrigatin Requirement t determine amunt f water cnsumed by crps in each sub-basin by applying the irrigatin requirement ver the perid f days irrigated Input Diversin Data Estimate available surface water resurces in each f the 3

31 BW-HMA PROJECT AREA Buffal Stres Municipal Water in Tie Hack Reservir and Diverts Water frm Clear Creek