WATER QUALITY MONITORING PLAN 2021

Wyoming Department of Environmental Quality Water Quality Division Watershed Protection Program

Table of Contents ’s Surface Water Quality Monitoring Strategy ...... 3 Purpose of the Annual Water Quality Monitoring Plan...... 3 Annual Monitoring Objectives – 2021 Field Season ...... 3 Objective 1 - Complete Bear and Snake Basins Probabilistic Survey ...... 3 Objective 2 – Conduct Water Quality Standards Attainment Studies ...... 4 Objective 3 – Provide Data Collection Support for Nutrient Criteria Development ...... 5 Objective 4 - Provide Data Collection Support for TMDLs ...... 5 Objective 5 – Evaluate Potential Harmful Cyanobacteria Blooms ...... 6 Watershed Protection Program Monitoring List for 2021 ...... 6 Quality Assurance and Quality Control ...... 6 Other Watershed Protection Program-Supported Projects for 2021 ...... 7 WDEQ-USGS Statewide Monitoring Network ...... 7

Figure 1. Monitoring locations included in the 2021 Monitoring Plan ...... 8 Figure 2. Sites included in the WDEQ-USGS statewide cooperative agreement...... 14

Table 1. Base and oversample sites for the Bear/Snake probabilistic survey...... 9 Table 2. Water quality standards attainment studies...... 12 Table 3. Nutrient-Related Monitoring ...... 12 Table 4. TMDL Program Assistance ...... 12 Table 5. WDEQ/USGS Cooperative Agreement ...... 12

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Wyoming’s Surface Water Quality Monitoring Strategy

Wyoming’s Surface Water Quality Monitoring Strategy and Strategy Addendum outlines primary and secondary monitoring objectives for meeting the agency’s surface water quality decision-making needs. Achievement of primary objectives occurs mostly using rotating-basin probabilistic surveys to assess statewide and regional water quality conditions and direct future targeted monitoring for making designated use-support determinations. Achievement of secondary objectives occurs through cooperation between the Watershed Protection Program’s Monitoring (Monitoring), Water Quality Standards (WQS), Non-Point Source (NPS) and Total Maximum Daily Load (TMDL) sub-programs and other entities. Monitoring works cooperatively with WQS to develop and implement study designs to develop new or revised water quality criteria. Evaluation of best management practices used to reduce non-point source pollutants often occurs through collaboration between Monitoring, NPS and TMDL. Likewise, some TMDL study designs and supporting data collection occurs through collaboration between Monitoring and TMDL.

Purpose of the Annual Water Quality Monitoring Plan

The annual water quality monitoring plan ties the monitoring strategy to specific monitoring projects planned for a given year. The plan serves as an information-sharing tool for the public, government, non-profits and other stakeholders. The plan highlights work of Monitoring and does not contain a complete account of water monitoring occurring within the Watershed Protection Program.

Monitoring Objectives – 2021 Field Season

1) Complete Bear and Snake Basins Probabilistic Survey 2) Conduct Water Quality Standards Attainment Studies 3) Provide Data Collection Support for Nutrient Criteria Development 4) Provide Data Collection Support for TMDLs 5) Evaluate Potential Harmful Cyanobacteria Blooms

Objective 1 - Complete Bear and Snake Basins Probabilistic Survey (Figure 1; Table 1)

Probabilistic rotating basin surveys (PRBS) address the primary objectives of the Wyoming Surface Water Quality Monitoring Strategy (WDEQ 2010, 2021). PRBS involve sampling a randomly selected subsample of a population of interest, similar to a census, in order to make inferences about characteristics of the population as a whole. Wyoming uses a customized generalized random tessellation- stratified (GRTS) survey design using the 1:100,000 scale National Hydrographic Dataset Plus (NHD+) as the base sample frame (see http://archive.epa.gov/nheerl/arm/web/html/presents.html; Stevens and Olson, 2004). Fifty primary sites are randomly selected from a target population of perennial, non- headwater (>1st Strahler order) rivers and streams outside of national parks, congressionally-designated wilderness areas and the Reservation within each of five geographic divisions of the State. The geographic divisions are referred to in this document and WDEQ (2010) as ‘superbasins’ due to their delineation using combinations of 6-digit (3rd level) Hydrologic Unit Codes (HUC) and geographical location. The five superbasins, the associated HUC 6 basins they represent, and the year (or anticipated year), the probabilistic survey was completed are: 3

Bighorn/Yellowstone [Bighorn and Yellowstone Basins] - 2010

Northeast [Belle Fourche, Cheyenne, Little Missouri, Powder and Tongue Basins] - 2011

Green [Great Divide, Green and Little Snake Basins] - 2015

Platte [Niobrara, North Platte and South Platte Basins] - 2016

Bear/Snake [Bear and Snake Basins] - 2021

Site selection is stratified into aggregations of 8-digit (4th level) HUCs, or “HUC8 clusters,” within each superbasin. The additional stratification more equally distributes the 50 primary sites among all HUC 8 clusters and across a superbasin. A population of 100 oversample sites (also stratified by HUC8 cluster) are used as replacements when a primary site cannot be sampled. Oversample sites replace primary sites occurring within the same HUC 8 cluster to maintain representativeness and minimize logistical complexities of sampling. Data from PRBS inform statistical inferences about water quality conditions within each superbasin, including the proportion of the stream target population likely achieving water quality criteria or statistically-derived expected conditions, and the occurrence, extent and relative risk of various pollutants. PRBS data are not used to make determinations of designated use support or resultant categorization decisions in Wyoming’s §305(b)/303(d) Integrated Report. PRBS data identify waters of high quality and those where designated use-support may be limited, thus candidates for future targeted monitoring for determinations of designated use support. Waterbodies are selected for targeted monitoring based on an informal priority ranking derived from findings of the probabilistic rotating basin survey and other factors such as public interest, human health risk, restoration potential, and agency resources.

The Bear/Snake is the fifth PRBS implemented by Monitoring. The survey occurs in 2021 followed by data analysis in 2022, and targeted monitoring of priority waterbodies in 2023 and 2024. Refer to the Bear/Snake PRBS sampling and analysis plan for more information.

Objective 2 – Conduct Water Quality Standards Attainment Studies (Figure 1; Table 2)

Sweetwater River - Class 1 Segment

The Sweetwater River from Alkali Creek upstream to its origin became a Class 1 waterbody in 1979. Section 4(a) of Chapter 1 of Wyoming’s Water Quality Rules and Regulations describes Class 1 waters as those surface waters in which no further water quality degradation by point source discharges other than from dams is allowed. Nonpoint sources of pollution shall be controlled through implementation of appropriate best management practices. Pursuant to Section 7 of these regulations, the water quality and physical and biological integrity which existed on the water at the time of designation will be maintained and protected.

Despite its Class 1 designation, the Sweetwater River has not been formally assessed. Monitoring will evaluate water quality conditions and standards attainment to enable assessment of designated uses for the Class 1 segment of the Sweetwater River. Select tributaries are included in the evaluation to increase the stream miles assessed and categorized in the Integrated Report.

Water quality data collected at various locations with various objectives over the years is not adequate data to determine if water quality has degraded since the designation as Class 1. Monitoring will collect

4 monthly water quality and flow data at three locations on the Class 1 segment for a third year to build a dataset as a baseline for future anti-degradation evaluations.

Objective 3 – Provide Data Collection Support for Nutrient Criteria Development (Figure 1; Table 3)

Monitoring and WQS will continue collecting nutrient and supporting data on lakes and reservoirs. The focus of 2021 monitoring will be 1) drinking water storage reservoirs and/or public reservoirs with high recreation uses for which limited or no nutrient data exist, and 2) Boysen Reservoir. Data will be used to ascertain the status of nutrient and algal productivity conditions in these waters and to assist in development of numeric nutrient criteria protective of aquatic life, recreation and/or drinking water. Data obtained from drinking water storage/public reservoirs will inform decisions on whether these waters are high priority for protection and/or restoration as part of Wyoming’s Nutrient Strategy. Data collected on Boysen Reservoir will be used in conjunction with external data to 1) verify predictions of cyanobacterial bloom densities from CyAN satellite imagery, 2) evaluate correlations of cyanotoxin concentrations with cyanobacterial densities and 3) develop nutrient thresholds protective of harmful cyanobacterial blooms and associated cyanotoxin concentrations for Boysen Reservoir.

Supplemental Stream and River Nutrient Monitoring

Monitoring will continue opportunistic collection of nutrient data to support development of numeric nutrient criteria for Wyoming. Nutrient data collected as part of the Bear/Snake PRBS in 2021 provides a representative snapshot of nutrient concentrations in that part of the state.

Objective 4 - Provide Data Collection Support for TMDLs (Figure 1, Table 4)

Brooks Lake

Brooks Lake is located near the headwaters of the Wind River in the . In 2008, a fish kill on Brooks Lake and Brooks Lake Creek prompted a multi-agency effort by Wyoming Game and Fish Department (WGFD), US Forest Service (USFS), and Monitoring to investigate water quality of Brooks Lake, particularly nutrient and algal productivity conditions. From 2009 to 2012, WDEQ, WGFD, and USFS cooperatively sampled Brooks Lake, its tributaries and outlet, the wastewater discharge from Brooks Lake Lodge, and reference lakes and tributaries. A water quality evaluation report for Brooks Lake was completed in 2015 by Monitoring. The report concluded that Brooks Lake was not supporting fisheries and aquatic life uses due to nutrient enrichment and elevated pH that regularly exceeded 9.0 SU. Potential sources of nutrients include the Brooks Lake Lodge wastewater lagoons, horse corrals, atmospheric deposition of nitrogen, and natural sources. As a result, Brooks Lake was added to the 2018 303(d) List for not supporting fisheries and aquatic life uses (WDEQ/WQD 2018a).

Within a “reasonable period of time” (loosely defined in EPA guidance as 8-13 years), a Total Maximum Daily Load or other alternative approach to work towards de-listing Brooks Lake must be completed. To support eventual Total Maximum Daily Load (or other alternative) development, WDEQ needs to enhance understanding of the impairment (i.e. stressor/response relationship), better quantify all nutrient loads from natural and anthropogenic sources, and define water quality goals (e.g. in-lake nitrogen and phosphorus concentration targets). Given current and projected staff workloads, recent wastewater lagoon infrastructure upgrades at Brooks Lake Lodge, as well as priorities identified in the Nutrient Strategy, WDEQ is pursuing a phased approach to address the Brooks Lake impairment. Phase I (2020- 5

21) features an abbreviated monitoring plan to track trends in Brooks Lake and in the effluent quality from Brooks Lake Lodge.

Objective 5 – Evaluate Potential Harmful Cyanobacteria Blooms

Monitoring will assist WQS with preliminary screening of suspected Harmful Cyanbacteria Blooms (HCBs, also known as Harmful Algal Blooms, or HABs) to determine if they are comprised of harmful cyanobacteria. Suspected harmful cyanobacteria will be sampled using standard operating procedures to determine if cyanotoxins and/or cyanobacteria cell densities are at potentially unsafe levels. The HCB coordinator will notify the Wyoming Department of Health if toxins and/or cyanobacteria densities exceed potentially unsafe levels so an Advisory is issued. Advisory notices are posted around the water body and include recommendations on how to keep people and animals safe. The HCB coordinator coordinates with the Wyoming Department of Health and the appropriate management agency to monitor the bloom until the toxins and/or the amount of cyanobacteria return to safe levels.

Watershed Protection Program Project List for 2021

See Tables 1-4 and Figures 1 and 2. Contact information for responsible staff is shown below:

Statewide: Jeremy Zumberge (phone: 307-675-5638, email [email protected]) Monitoring Supervisor Wyoming Department of Environmental Quality - Water Quality Division 2100 W. 5th, Sheridan, WY 82801

Cheyenne: Eric Hargett (phone: 307-777-6701, email: [email protected]) Triston Rice (phone: 307-777-6353, email: [email protected]) Wyoming Department of Environmental Quality - Water Quality Division 200 West 17th Street, Cheyenne, WY 82002

Lander: Tavis Eddy (phone: 307-335-6957, email: [email protected]) Mike Wachtendonk (phone: 307-335-6751, email: [email protected]) Wyoming Department of Environmental Quality - Water Quality Division 510 Meadowview Drive, Lander, WY 82520

Sheridan: Jason Martineau (phone: 307-675-5632, email: [email protected]) Chad Rieger (phone: 307-675-5637, email: [email protected]) Wyoming Department of Environmental Quality - Water Quality Division 2100 W. 5th, Sheridan, WY 82801

Quality Assurance and Quality Control

Quality assurance and quality control (QA/QC) procedures are critical components of monitoring plans. QA/QC procedures apply to all monitoring strategy operations to ensure that the results obtained are of known and suitable quality to meet monitoring objectives. WDEQ (2016) and WDEQ (2018b) describe QA/QC procedures integrated into monitoring plans.

All data are collected in accordance with the credible data law specified in the Wyoming Environmental Quality Act § 35-11-302 (b)(i) and (b)(ii) and detailed in Chapter 1, Section 35 of the Wyoming Water Quality Rules and Regulations.

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Other Watershed Protection Program-Supported Projects for 2021

WDEQ-USGS Statewide Monitoring Network WDEQ cooperates with the Geological Survey (USGS) to monitor 17 stream and river sites across the state (Table 5 and Figure 2). WDEQ cooperatively supports six streamflow measurement gages though non-WDEQ funded gages exist at many of the sites. Sampling occurs either quarterly or monthly, depending on objectives. Specific sampled parameters also vary by site depending on objectives, but include field parameters, major ions, trace metals, nutrients, sediment, and/or bacteria.

Figure 1. Monitoring locations included in the 2021 Monitoring Plan

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Table 1. Base and oversample sites for the Bear/Snake probabilistic survey.

SurveyID Stream Name Type Latitude Longitude HUC8 Cluster HUC10 Field Office WY09C-026 Cliff Creek Base 43.13178981 -110.52175941 Snake Lower Hoback Sheridan WY09C-027 Tincup Creek Base 43.02369766 -111.04032667 Snake Lower Salt Lander WY09C-028 Pilgrim Creek Base 43.93636828 -110.56242351 Snake - Moose Creek Sheridan WY09C-029 Snake River Base 43.34430384 -110.72255319 Snake Snake River - Fall Creek Sheridan WY09C-030 Kilgore Creek Base 43.11356209 -110.43464787 Snake Upper Hoback Sheridan WY09C-031 Base 43.16135740 -111.00020677 Snake Greys River Lander WY09C-032 Mosquito Creek Base 43.43808362 -110.89837202 Snake Snake River - Fall Creek Sheridan WY09C-033 Buffalo Fork Base 43.83876024 -110.22221212 Snake Buffalo Fork Sheridan WY09C-034 Bear Creek Base 42.82657830 -110.74700143 Snake Greys River Lander WY09C-035 Base 42.82446474 -110.99180747 Snake Middle Salt Lander WY09C-036 Flat Creek Base 43.48793907 -110.76349600 Snake Flat Creek Sheridan WY09C-037 Blackrock Creek Base 43.80477126 -110.17232907 Snake Buffalo Fork Sheridan WY09C-038 Corral Creek Base 42.67956286 -110.72550223 Snake Greys River Lander WY09C-039 Base 42.60257174 -110.91583074 Snake Upper Salt Lander WY09C-040 Snake River Base 43.25574005 -110.77792304 Snake Snake River - Fall Creek Sheridan WY09C-041 Cottonwood Creek Base 43.55376340 -110.25805723 Snake Upper Gros Ventre Sheridan WY09C-042 Gros Ventre River Base 43.62889577 -110.49674900 Snake Lower Gros Ventre Sheridan WY09C-043 Salt River Base 42.78076186 -110.97148469 Snake Middle Salt Lander WY09C-044 Hoback River Base 43.28056189 -110.60911596 Snake Lower Hoback Sheridan WY09C-045 South Fork Fish Creek Base 43.57444228 -110.16316715 Snake Fish Creek Sheridan WY09C-046 Greys River Base 43.16850178 -111.01367048 Snake Snake River - Fall Creek Sheridan WY09C-047 Crow Creek Base 42.66265413 -111.03226143 Snake Upper Salt Lander WY09C-048 North Leigh Creek Base 43.84205776 -110.99336520 Snake Middle Teton River Sheridan WY09C-049 Murphy Creek Base 43.05583868 -110.87063696 Snake Greys River Lander WY09C-050 Base 43.43134978 -109.84145087 Snake Fish Creek Sheridan WY09C-276 Snake River OverSample 43.38735309 -110.75937338 Snake Snake River - Fall Creek Sheridan WY09C-277 Bullmoose Creek OverSample 43.50932041 -109.98801393 Snake Fish Creek Sheridan WY09C-278 Little Greys River OverSample 43.12307539 -110.75553131 Snake Greys River Lander WY09C-279 Wyoming Creek OverSample 44.12882239 -111.04701428 Snake Robinson Creek Sheridan WY09C-280 South Fork Spread Creek OverSample 43.68863144 -110.28212691 Snake Snake River - Spread Creek Sheridan WY09C-281 Buffalo Fork OverSample 43.84460990 -110.42641187 Snake Buffalo Fork Sheridan WY09C-282 North Fork Cottonwood Creek OverSample 42.64236276 -110.81820436 Snake Upper Salt Lander WY09C-283 Snake River OverSample 43.41002107 -110.82199958 Snake Snake River - Fall Creek Sheridan WY09C-284 Cottonwood Creek OverSample 43.55650313 -110.25566135 Snake Upper Gros Ventre Sheridan WY09C-285 Salt River OverSample 42.93303410 -111.01589271 Snake Lower Salt Lander WY09C-286 Stump Creek OverSample 42.78839220 -111.03123742 Snake Middle Salt Lander WY09C-287 Dell Creek OverSample 43.25295501 -110.32217391 Snake Upper Hoback Sheridan WY09C-288 Gros Ventre River OverSample 43.61801914 -110.64365429 Snake Lower Gros Ventre Sheridan WY09C-289 Salt River OverSample 43.00447293 -111.02349801 Snake Lower Salt Lander WY09C-290 Salt River OverSample 42.67272651 -110.95670525 Snake Upper Salt Lander WY09C-291 Hoback River OverSample 43.24493598 -110.47125062 Snake Lower Hoback Sheridan WY09C-292 Fall Creek OverSample 43.33599830 -110.81263014 Snake Snake River - Fall Creek Sheridan WY09C-293 Salt River OverSample 43.12341701 -111.03300945 Snake Lower Salt Lander WY09C-294 Salt River OverSample 42.79832219 -110.97256564 Snake Middle Salt Lander WY09C-295 Jack Creek OverSample 43.21505034 -110.40548476 Snake Upper Hoback Sheridan WY09C-296 South Fork Fish Creek OverSample 43.50409011 -110.02441027 Snake Fish Creek Sheridan WY09C-297 Snake River OverSample 43.19091536 -110.93386310 Snake Snake River - Fall Creek Sheridan WY09C-298 Greys River OverSample 42.98251958 -110.77600421 Snake Greys River Lander WY09C-299 Gros Ventre River OverSample 43.60524223 -110.39332597 Snake Upper Gros Ventre Sheridan WY09C-300 Willow Creek OverSample 43.27997418 -110.68936583 Snake Lower Hoback Sheridan WY09C-0776 Blackrock Creek OverSample 43.78070634 -110.13409221 Snake Buffalo Fork Sheridan WY09C-0777 Snake River OverSample 43.34518793 -110.72159391 Snake Snake River - Fall Creek Sheridan WY09C-0778 Spring Creek OverSample 42.57399693 -111.01593892 Snake Upper Salt Lander WY09C-0779 Snake River OverSample 43.26679045 -110.78520789 Snake Snake River - Fall Creek Sheridan WY09C-0780 South Fork Fish Creek OverSample 43.44987238 -109.92974325 Snake Fish Creek Sheridan

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SurveyID Stream Name Type Latitude Longitude HUC8 Cluster HUC10 Field Office WY09C-0781 Gros Ventre River OverSample 43.61084200 -110.39752459 Snake Upper Gros Ventre Sheridan WY09C-0782 Salt River OverSample 42.69489620 -110.96754890 Snake Upper Salt Lander WY09C-0783 OverSample 43.00688687 -111.01957437 Snake Lower Salt Lander WY09C-0784 Polecat Creek OverSample 44.11222743 -110.70197274 Snake Snake River - Moose Creek Sheridan WY09C-0785 South Fork Fisherman Creek OverSample 43.13638793 -110.34351513 Snake Upper Hoback Sheridan WY09C-0786 OverSample 42.79602436 -110.98181227 Snake Middle Salt Lander WY09C-0787 Salt River OverSample 43.07373476 -111.03411540 Snake Lower Salt Lander WY09C-0788 Flat Creek OverSample 43.55050943 -110.69577224 Snake Flat Creek Sheridan WY09C-0789 Willow Creek OverSample 43.27977114 -110.68937249 Snake Lower Hoback Sheridan WY09C-0790 Snake River OverSample 43.18352610 -110.95733552 Snake Snake River - Fall Creek Sheridan WY09C-0791 Fall Creek OverSample 43.33381121 -110.80860851 Snake Snake River - Fall Creek Sheridan WY09C-0792 Salt River OverSample 42.91301882 -111.01880314 Snake Lower Salt Lander WY09C-0793 Sheep Creek OverSample 42.83844983 -110.60679694 Snake Greys River Lander WY09C-0794 Greys River OverSample 43.02971295 -110.81204656 Snake Greys River Lander WY09C-0795 South Leigh Creek OverSample 43.81561699 -110.95761700 Snake Middle Teton River Sheridan WY09C-0796 Fish Creek OverSample 43.55090482 -110.23182973 Snake Fish Creek Sheridan WY09C-0797 Hoback River OverSample 43.22640943 -110.42783849 Snake Upper Hoback Sheridan WY09C-0798 Swift Creek OverSample 42.74756873 -110.84061268 Snake Upper Salt Lander WY09C-0799 Buffalo Fork OverSample 43.84714418 -110.31922010 Snake Buffalo Fork Sheridan WY09C-0800 Mosquito Creek OverSample 43.44229597 -110.87275371 Snake Snake River - Fall Creek Sheridan Bear-064 Base 41.84716329 -110.6305349 Bear Twin Creek Cheyenne Bear-065 Emelle Ditch Base 42.13396866 -110.8845232 Bear Smiths Fork Lander Bear-066 Smiths Fork Base 42.41013321 -110.8444339 Bear Smiths Fork Lander Bear-067 Base 41.55369587 -110.9896408 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-068 Base 41.82420794 -111.0015736 Bear Bear River - Bridger Creek Cheyenne Bear-069 Base 42.01648212 -110.8795151 Bear Bear River Cheyenne Bear-070 Base 42.41854598 -110.7358773 Bear Smiths Fork Lander Bear-071 Old City Ditch Base 41.25808213 -110.9467671 Bear Bear River - Sulphur Creek Cheyenne Bear-072 Antelope Creek Base 41.91117101 -110.9471798 Bear Bear River - Bridger Creek Cheyenne Bear-073 Smiths Fork Base 42.27815217 -110.8684637 Bear Smiths Fork Lander Bear-074 Huff Creek Base 42.3197698 -110.9743577 Bear Thomas Fork Cheyenne Bear-075 Stowe Creek Base 41.16787148 -110.8009501 Bear Bear River - Sulphur Creek Cheyenne Bear-076 Base 41.80971572 -110.8269239 Bear Twin Creek Cheyenne Bear-077 Salt Creek Base 42.40103794 -111.0395183 Bear Thomas Fork Cheyenne Bear-078 Mill Creek Base 42.21663358 -110.9476411 Bear Smiths Fork Lander Bear-079 Base 41.22164074 -110.9907317 Bear Yellow Creek Cheyenne Bear-080 Base 41.86271652 -110.6869938 Bear Twin Creek Cheyenne Bear-081 Bear River Base 41.95925974 -110.9627104 Bear Bear River Cheyenne Bear-082 Hobble Creek Base 42.41178943 -110.7808176 Bear Smiths Fork Lander Bear-083 Base 41.5182704 -110.9541957 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-084 Twin Creek Ditch Base 41.86346893 -110.9976464 Bear Bear River - Bridger Creek Cheyenne Bear-085 Rock Creek Base 41.95654183 -110.8346436 Bear Twin Creek Cheyenne Bear-086 Base 42.5333296 -110.7656175 Bear Smiths Fork Lander Bear-087 Base 41.28004609 -110.8514246 Bear Bear River - Sulphur Creek Cheyenne Bear-088 Base 41.74522969 -111.0040426 Bear Bear River - Bridger Creek Cheyenne Bear-089 Coantag Creek Base 42.36196345 -110.7566321 Bear Smiths Fork Lander Bear-090 South Fork Raymond Creek Base 42.26898518 -110.9802316 Bear Thomas Fork Cheyenne Bear-091 Base 41.03143818 -110.8084052 Bear Bear River - Sulphur Creek Cheyenne Bear-092 Base 41.76695824 -110.8618282 Bear Twin Creek Cheyenne Bear-093 Robinson Creek OverSample 42.46985964 -111.0354754 Bear Thomas Fork Cheyenne Bear-094 Bear River OverSample 42.16760039 -111.0182549 Bear Bear River Cheyenne Bear-095 Yellow Creek OverSample 41.04063715 -110.9735535 Bear Yellow Creek Cheyenne Bear-096 OverSample 41.80281014 -110.7390006 Bear Twin Creek Cheyenne Bear-097 Bear River OverSample 41.93577396 -110.990417 Bear Bear River Cheyenne Bear-098 OverSample 42.46446428 -110.8883377 Bear Thomas Fork Cheyenne

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SurveyID Stream Name Type Latitude Longitude HUC8 Cluster HUC10 Field Office Bear-099 OverSample 41.68430124 -110.9470132 Bear Bear River - Bridger Creek Cheyenne Bear-100 Bear River OverSample 41.85023236 -111.0290835 Bear Bear River - Bridger Creek Cheyenne Bear-101 OverSample 42.05569444 -111.039422 Bear Bear River Cheyenne Bear-102 OverSample 42.55803496 -110.7714157 Bear Smiths Fork Lander Bear-103 OverSample 41.12937628 -110.7586685 Bear Bear River - Sulphur Creek Cheyenne Bear-104 Bridger Creek OverSample 41.77717976 -111.0463285 Bear Bear River - Bridger Creek Cheyenne Bear-105 OverSample 42.36491221 -111.000969 Bear Thomas Fork Cheyenne Bear-106 Chalk Creek OverSample 42.17966177 -110.9689308 Bear Bear River Cheyenne Bear-107 OverSample 41.08180542 -110.7614548 Bear Bear River - Sulphur Creek Cheyenne Bear-108 Ryan Creek OverSample 42.04727009 -110.8647073 Bear Bear River Cheyenne Bear-109 Little White Creek OverSample 42.53053552 -110.9704972 Bear Thomas Fork Lander Bear-110 Pleasant Valley Creek OverSample 41.34669298 -110.8557453 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-111 Bear River OverSample 41.38422312 -111.0121912 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-112 OverSample 41.77391566 -110.6613398 Bear Twin Creek Cheyenne Bear-113 OverSample 42.02118986 -110.9400477 Bear Bear River Cheyenne Bear-114 OverSample 42.45761439 -110.7124827 Bear Smiths Fork Lander Bear-115 South Fork Twin Creek OverSample 41.70873689 -110.710619 Bear Twin Creek Cheyenne Bear-116 Little Beaver Creek OverSample 41.93361342 -110.8266592 Bear Twin Creek Cheyenne Bear-117 Smiths Fork OverSample 42.31185567 -110.8767937 Bear Smiths Fork Lander Bear-118 Smiths Fork OverSample 42.47716805 -110.8314217 Bear Smiths Fork Lander Bear-119 OverSample 41.15452337 -110.8823368 Bear Bear River - Sulphur Creek Cheyenne Bear-120 OverSample 41.75612556 -111.0434003 Bear Bear River - Big Creek Cheyenne Bear-121 Little Muddy Creek OverSample 42.37265585 -110.9203466 Bear Thomas Fork Cheyenne Bear-122 OverSample 42.21130322 -110.9076963 Bear Smiths Fork Lander Bear-123 Yellow Creek OverSample 41.05880453 -110.9912164 Bear Yellow Creek Cheyenne Bear-124 Covey Canal OverSample 42.04228521 -110.923709 Bear Bear River Cheyenne Bear-125 Trespass Creek OverSample 42.44870621 -110.8307936 Bear Smiths Fork Lander Bear-126 Salt Creek OverSample 41.47111818 -110.9108966 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-127 OverSample 41.44834556 -111.0011076 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-128 Birch Creek OverSample 42.12355555 -110.9410725 Bear Bear River Cheyenne Bear-129 Coantag Creek OverSample 42.42555734 -110.6760807 Bear Smiths Fork Lander Bear-130 OverSample 41.18156766 -110.8887221 Bear Bear River - Sulphur Creek Cheyenne Bear-131 OverSample 41.86878441 -110.8453856 Bear Twin Creek Cheyenne Bear-132 Emelle Ditch OverSample 42.14619774 -110.8819804 Bear Smiths Fork Lander Bear-133 OverSample 42.39293697 -110.8239667 Bear Smiths Fork Lander Bear-134 OverSample 41.90422484 -111.015308 Bear Bear River - Bridger Creek Cheyenne Bear-135 Slide Creek OverSample 42.36427113 -110.7364417 Bear Smiths Fork Lander Bear-136 OverSample 42.3288073 -110.9462628 Bear Thomas Fork Cheyenne Bear-137 OverSample 42.06630871 -110.8591918 Bear Bear River Cheyenne Bear-138 Bear River OverSample 41.00966676 -110.9117902 Bear Bear River - Stillwater Fork Cheyenne Bear-139 OverSample 41.74073394 -110.7101334 Bear Twin Creek Cheyenne Bear-140 Red Eye Creek OverSample 41.62518526 -111.0030471 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-141 Sawmill Creek OverSample 42.237634 -110.8560997 Bear Smiths Fork Lander Bear-142 OverSample 41.13487773 -111.025888 Bear Yellow Creek Cheyenne Bear-143 OverSample 42.49466948 -110.9843615 Bear Thomas Fork Cheyenne Bear-144 Covey Canal OverSample 41.97471645 -110.9417936 Bear Bear River Cheyenne Bear-145 Bear River OverSample 41.11003358 -110.9095769 Bear Bear River - Sulphur Creek Cheyenne Bear-146 OverSample 41.81785994 -110.8607618 Bear Twin Creek Cheyenne Bear-147 Huff Creek OverSample 42.35456098 -110.9662438 Bear Thomas Fork Cheyenne Bear-148 Middle Fork Fowkes Canyon Creek OverSample 41.39497851 -110.9494427 Bear Bear River - Pleasant Valley Creek Cheyenne Bear-149 OverSample 42.46789193 -110.8841967 Bear Thomas Fork Cheyenne Bear-150 Bear River OverSample 41.28060361 -110.9703927 Bear Bear River - Sulphur Creek Cheyenne

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Table 2. Water quality standards attainment studies.

Basin Waterbody DEQ Class Crew North Platte Sweetwater River 1 Lander

Table 3. Nutrient-Related Monitoring

Basin Waterbody Latitude Longitude Crew Objective* Wind Wind River 43.588890 -108.215368 Sheridan 2 Wind Wind River 43.424888 -108.178666 Sheridan 2 Wind Worthen Meadows Reservoir 42.700229 -108.923191 Lander 1 Wind Frye Lake 42.708270 -108.877407 Lander 1 Wind Boysen Reservoir 43.359351 -108.175196 Sheridan 1 Bighorn Lower Sunshine Reservoir 44.08677 -108.9868 Sheridan 1 Bighorn West Newton Lake 44.54359 -109.12371 Sheridan 1 1 = Nutrient and cyanobacteria monitoring; 2 = Cyanotoxin monitoring

Table 4. TMDL Program Assistance

Basin Waterbody Latitude Longitude Crew Wind Brooks Lake 43.75639 -110.0037 Lander

Table 5. WDEQ/USGS Cooperative Agreement

Station ID Station Name Constituents1 Frequency 06236100 Wind River above Boysen Reservoir Field, Nutrients, Bacteria, Gage 12/yr 06253000 Fivemile Creek near Shoshoni Field, Nutrients, Bacteria 12/yr 06258000 Muddy Creek near Shoshoni Field, Nutrients, Bacteria, Gage 12/yr Sediment (continuous turbidity and 06283995 Shoshone River above Willwood Dam acoustic backscatter), Gage Sediment (continuous turbidity and 06284010 Shoshone River below Willwood Dam acoustic backscatter), Gage Field, Major ions, Nutrients, Trace 06259000 Wind River below Boysen Reservoir 12/yr elements Field, Major Ions, Nutrients, Trace 06268600 at Worland 12/yr Elements, TSS, Bacteria (4/yr) Field, Major Ions, Trace Elements, 06313400 Salt Creek at Sussex 12/yr Se (FIL) Field, Major Ions, Trace Elements, 06317000 Powder River at Arvada 12/yr Nutrients 06630000 North Platte River above Seminoe, near Sinclair Field, Nutrients 12/yr

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Medicine Bow River above Seminoe Reservoir 06635000 Field, Nutrients, Bacteria 12/yr near Hanna Little Medicine Bow River above Sand Creek, 06634060 Gage only near Shirley Basin Field, Major ions, Nutrients, Trace 06636000 N Platte River above Pathfinder Reservoir 12/yr elements 06641000 North Platte River below Pathfinder Reservoir Field, Major ions, Nutrients 4/yr Field, Major ions, Nutrients, Trace 06639000 Sweetwater River near Alcova 4/yr Elements, Bacteria 06642000 North Platte River at Alcova Field, Nutrients 4/yr

13025500 Crow Creek near Fairview Field, Nutrients, Se (FIL), Gage 4/yr

1. Field parameters: discharge, pH, water temperature, dissolved oxygen, electrical conductivity

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Figure 2. Sites included in the WDEQ-USGS statewide cooperative agreement. Refer to Table 5 for site names associated with each ID.

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