Utah Lake Watch Report 2009

Utah State University Water Quality Extension

Prepared by: Eric Peterson

1 Introduction

As a statewide monitoring program, Utah Lake Watch (ULW) enlists the help of volunteers to collect data used to evaluate the general condition of Utah’ s lakes and reservoirs and how that changes over time. The data collected are used by the Utah Division of Water Quality and lake managers to determine whether the lake’s water quality is good enough to support the benefits that our lakes provide, such as recreational uses, fisheries and esthetic benefits.

This report discusses the water transparency data (Secchi depths) and other related data collected in 2009 by citizen monitors throughout Utah. In 2009, USU’s Water Quality Extension program also conducted a pilot study on the use of citizen volunteers to collect bacterial data. The results of the pilot study will be reported in a separate document.

Major objectives of the program include: •acquiring baseline data for Utah’s lakes and reservoirs; •providing education to state citizens on the importance of healthy lakes, how lakes function, and how to monitor lakes; and •demonstrating the effectiveness of citizen monitoring in collecting water quality data which can be used to better manage and protect our lakes and reservoirs

To meet th ese o bjecti ves parti ci pant s are t rai ned t o measure th e t ransparency and make some simple observations for a particular lake or reservoir. Transparency correlates to other indicators of a lake’s condition, such as the amount of suspended algae growing in the lake, the amount of nutrients entering the lake, and the seasonal patterns of plant growth.

Methods

Utah Lake Watch participants measure transparency using a Secchi disk. A Secchi disk is a white and black weighted disk attached to a line which is lowered into the water until it is no longer visible. The line is pulled slowly back up and the depth at which the Secchi disk reappears is recorded. This is referred to as the “Secchi depth.” Although the measurement is quite simple, in most cases the volunteer needs a boat to get to the location in the lake established by the Utah Division of Water Quality. Each volunteer is trained by USU Water Quality Extension. This training takes place at the lake or reservoir the volunteer will be monitoring. The training consists of a brief introduction to the Lake Watch program and its goals, followed by a demonstration of how to take a Secchi measurement, which is usually done from a boat dock for the training.

2 Volunteers are encouraged to take measurements on a regular basis from May until September. When these Secchi depths are taken at regular intervals throughout a summer, a picture of the seasonal changes in lake turbidity emerges. Secchi depths collected over multiple years can indicate whether a lake’s trophic state is changing over time.

The participants record the Secchi depths and other simple observations on a data sheet, and return the data to USU Water Quality Extension at the end of the season. USU Water Quality Extension compiles the raw data, and summarizes all the findings into an annual report. The report and data are delivered electronically to the Utah Division of Water Quality. USU Extension also sends the individual lake summaries to the citizen volunteers.

Results

Because we depend entirely on volunteers, not all lakes are monitored each year. Since 2002, 37 different waterbodies have been monitored by Lake Watch volunteers (See Appendix B). Annual reports may be obtained by contacting USU Water Quality Extension, Utah Division of Water Quality, or on the USU Water Quality Extension website at www.extension.usu.edu/waterquality.

In 2009, 13 lakes and reservoirs were successfully monitored. The results for each monitori ng event i n 2009 are separa te ly disp laye d for eac h in div idua l la ke or reservo ir in this report. In addition, all raw data collected by the 2009 volunteers is included in Appendix A.

Figure 1 displays the average Secchi depth for each waterbody monitored in 2009, and Table 1 includes additional information about each waterbody. Bear Lake Site 1 had the maximum average depth for 2009 at 6. 3 meters, while Starvation Reservoir recorded the maximum individual reading with 8.3 meters. The minimum average depth was 0.32 meters at Utah Lake Site 2, which also recorded the lowest individual reading of 0.20 meters. The number of samples at each site varied, as well as the dates of collection as seen in Table 1.

Discussion

Lake transparency is a measure of how many tiny particles are suspended in the lake water. In most lakes these particles are primarily microscopic plants called algae. These algae increase and decrease throughout a year, as the plants grow and die. The maximum amount of algae each year is related to the nutrients in the reservoir, because these nutrients feed the plants. Most of these nutrients enter a lake through tributaries or through erosion or resuspension of sediments within a lake.

3 Average Secchi Depth Lake/Reservoir

0

1

2

3

epth (meters) 4

5

Secchi D 6

7

Figure 1. Average Secchi measurements for each lake or reservoir monitored in 2009 by ULW volunteers.

4 Table 1. Maximum, minimum, and average depths, along with the number of measurements collected at each site and the months of collection at the site.

Number of Average Measurements Months of Lake / Reservoir Max (m) Min (m) (m) Collected Collection

Bear Lake 1 7.50 5.10 6.30 6 June-September

Bear Lake 2 3.15 2.40 2.93 12 May-August

Burreston Pond 2.00 2.00 2.00 1 August

Causey Reservoir 5.60 2.50 3.50 3 June-August

Deer Creek Reservoir 6006.00 3603.60 5005.00 6 June-September

Grantsville Reservoir 2.55 2.55 2.55 1 July

Hyrum Reservoir 1.60 1.40 1.50 3 August-September

Otter Creek Reservoir 2.20 1.25 1.64 5 July-August

Pineview Reservoir 1 5.60 4.30 4.77 6 July-September

Pineview Reservoir 2 5.70 2.10 4.30 8 May-September

Red Fleet Reservoir 2.80 0.90 1.83 7 June-September

Starvation Reservoir 8.30 2.20 5.10 15 April-September

Steinaker Reservoir 4.50 2.10 3.10 7 June-September

Utah Lake 1 0.41 0.24 0.33 4 June-August

Utah Lake 2 0.40 0.20 0.32 3 June-July

Yuba Reservoir 1.65 0.77 1.30 7 June-August

5 Eutrophication, or lake aging, is a natural process by which a lake fills in over thousands of years, mostly from eroded materials carried by the tributary streams, with the remains of plants and animals produced in the lake itself and other sources.

Cultural eutrophication occurs when human influences increase the nutrients entering the lake from a variety of new sources, such as direct discharge of sewage, septic tank leakage, and runoff from areas affected by human development, such as agricultural lands, logged or mining areas, and urban areas. These increased nutrients cause excessive plant growth. Dissolved oxygen in the lake is consumed when these plants die and decay. This can lead to fish kills and loss of game fish, taste and odor problems if the water is treated for culinary purposes, loss of recreational value of the lake if weeds hinder boats and water skiers, and aesthetic problems from turbid water or decaying material on the shores.

Scientists often classify lakes according to the degree of eutrophication. One commonly used system is called a “Trophic State Index” or “TSI”, developed by Carlson in 1977. Carlson developed this index by collecting data from hundreds of lakes and comparing nutrients in the lake with the microscopic algae concentrations and average Secchi depth. Table 2 summarizes the classification of lakes by trophic state index. This simplified system allows lake managers and scientists to compare lakes with each other and to evaluate changes in a lake over time.

VlVolun teers are encourage dtd to tktake measurement s on a regul ar b as is from May un til September. When these Secchi depths are taken at regular intervals throughout a summer, a picture of the seasonal changes in lake turbidity emerges. Secchi depths collected over multiple years can indicate whether a lake’s trophic state is changing over time.

Classification Definition Secchi Depth Chl TP TSI (m) (μg/L) (μg/L) Oligotrophic A waterbody having low turbidity and > 4 abundant dissolved oxygen (i.e. good < 2.6 < 12 < 40 water quality). Mesotrophic A waterbody having moderate turbidity and moderate dissolved oxygen (i.e. 2-4 2.6-7.3 12-24 40-50 moderate water quality). Eutrophic A waterbody having high turbidity and low dissolved oxygen (impaired water quality). 0.5-2 7.3-56 24-96 50-70

Hypereutrophic A waterbody that is extremely turbid and exceptionally low in dissolved oxygen (i.e. < 0.5 > 56 96-384 > 70 very poor water quality).

Tbl2Table 2. ThiTrophic Sta te Class ifica tions (Car lson, 1996), wh ere Chl is th e Chl orop hy ll concent rati on, TP i s the Total Phosphorus concentration, and TSI is the calculated value of the Trophic State Index.

6 In this report, we converted the average Secchi depth to a TSI value. This value can be somewhat confusing because as the Secchi depths get smaller, the TSI values get larger. Several lakes and reservoirs monitored have relatively low TSI values including Bear Lake, Deer Creek, Starvation, Pineview, Causey, Steinaker, and Grantsville Reservoirs. All of these waterbodies have TSI values below 50. The remaining waterbodies monitored were between 50 and 60 with the exception of Utah Lake, which had values spiking at 76.2 and 77.2 for the two sites on the lake. A Secchi depth is only one of the measurements that may be used in calculating a Trophic State Index(TSI) and caution must be used when evaluating the overall health of a lake based on only one type of data.

Increased nutrients in many lakes may lead to lower water clarity. However, water clarity may also result from resuspension of lake sediments in shallow lakes from carp or other bottom dwelling fish, or from wind in very shallow lakes.

General trends show that many of the lakes and reservoirs monitored in this program are mesothitrophicor oligo trop hicandhd show s iilimilar resu lts year a fter year. These lklakes include Bear Lake, Starvation, Causey, Steinaker, and Grantsville Reservoirs. This suggests that these waterbodies are healthy and are not impacted by excess nutrients. Utah Lake has also remained consistent in numbers over the past few years with continually high TSI values. These higher values can be expected because of many factors in Utah Lake including a low average depth, frequent wind, and a large population of carp .

Some reservoirs, however, have trends that show possible decreases in water quality. Hyrum and Red Fleet reservoirs, for example, have both shown an increase in TSI values over the past few years indicating possible increases in nutrients in these reservoirs. Bear Lake site 1 has remained consistent; however, site 2 has shown some increase in TSI value indicating possible nutrient increase at that location. Site 1 is located in the Southwestern portion of the lake, not far from the Utah State Park marina. Site 2 is located in the Northwestern part of the lake near an incoming stream and in shallower water. These differences in location could be the cause of the different TSI values as the shallower water at site 2 could allow for more scouring due to wind, and the incoming stream could be bringing in more nutrients and also causing additional scouring. Some waterbodies, such as Pineview and Deer Creek reservoirs, appear to be improving over the past few years. These decreases in TSI values could be due to decreases in nutrients, but may also have resulted from other factors such as increased reservoir water levels in recent years.

We hope that the Utah Lake Watch program will continue to help us further understand the health of our local waterbodies. The results for individual lakes and reservoirs are inc lu de d in the rema in der o f this repor t. Eac h vo lun teer mon itor rece ives this por tion of the report and their results from the lake or reservoir which they monitored.

Thank you to all of the volunteers who participated in the 2009 Utah Lake Watch! 7 Oligotrophic Mesotrophic Eutrophic Hypereutrophic

Bear Lake Burreston Pond* Hyrum Reservoir Utah Lake Deer Creek Reservoir Causey Reservoir Otter Creek Reservoir Pineview Reservoir Steinaker Reservoir Red Fleet Reservoir Starvation Reservoir Grantsville Reservoir Yuba Reservoir

Table 3. ULW Lake and Reservoir Classifications. Note: This classification is based on 2009 data only and does not account for past trends. * This waterbody is shallow and the Secchi disk can hit the bottom of the lake, which does not allow for an accurate representation of the TSI value or classification

References

Utah Water Quality Division Lake Reports < http://www.waterquality.utah.gov/watersheds/lakes.htm>

Carlson, Robert E. “A Trophic State Index for Lakes” Limnology and Oceanography 1977: 361-369.

Carlson, R.E. and J. Simpson. 1996. A Coordinator’s Guide to Volunteer Lake Monitoring Methods. North American Lake Management Society. 96 pp.

Judd, Harry Lewis. 1997. Utah’s Lake and Reservoirs Inventory and Classification of Utah’s Priority Lakes and Reservoirs. Utah Department of Environmental Quality, Division of Water Quality.

8 Bear Lake 1 Summary Data Volunteer Monitors: Scott Tolentino / Erin Gittinger

Bear Lake is a large natural lake on the Utah/Idaho border. A variety of water activities are available at this pristine lake, including, boating, fishing, camp ing, p icnicking and windsurfing. According to the ULW TSI value, Bear Lake is in a steady oligotrophic state.

Location: N 41° 57.911’ W 111° 22.859’ Approximately ¾ mile East of Utah State Park Marina .

Date Time Secchi Depth TSI Weather 6/25/2009 11:00 6.3 33.5 Partly Cloudy 6/30/2009 9:00 7.5 31.0 Clear 7/8/2009 10: 45 676.7 32. 6 Clear 8/17/2009 13:30 5.1 36.5 Partly Cloudy 8/24/2009 11:00 6.1 33.9 Overcast 9/8/2009 10:00 6.2 33.7 Clear Average 6.3 33.5

9 Bear Lake 2 Summary Data Volunteer Monitor: Kate Pretorius Bear Lake site two had a somewhat higher value for TSI than site one. According to site two, Bear Lake is in a mesotrophic state. The depth values for this site remained consihhfhistent through most of the summer, wi ihhiflth the exception of late May to earl y June, wh en depths were slightly lower, possibly due to algal blooms.

Location: N 42° 01.800’ W 111° 22.800 ‘ Near West shoreline, about two miles North of Idaho/Utah border

DtDate Time ShiDthSecchi Depth TSI WthWeather 5/24/2009 14:15 2.75 45.4 Rain 5/31/2009 18:30 2.40 47.4 Rain 6/8/2009 14:05 2.57 46.4 Rain 6/14/2009 15:45 2.98 44.3 Overcast 6/21/2009 14:10 2.76 45.4 Rain 6/30/2009 16:30 3.12 43.6 Clear 7/5/2009 16:05 3.15 43.5 Clear 7/12/2009 11:45 3.06 43.9 Clear 7/20/2009 16:30 3.14 43.5 Clear 7/26/2009 14:00 3.08 43.8 Clear 8/2/2009 17:10 3.12 43.6 Clear 8/10/2009 17:15 3.08 43.8 Clear Average 2.9 44.5

10 Burreston Pond Summary Data Volunteer Monitor: Scott and Bunny Andrews

Burreston Pond is located near Mona, Utah. The average Secchi measurement in Burreston Pond for 2009 was 2.0m. Althougggh this average Secchi measurement would normally result in a TSI value of 50.0, it is important to note that Burreston Pond is a shallow body of water and the Secchi disk can hit bottom before disappearing, therefore the TSI classification does not work properly for this site. It is likely not mesotrophic as the TSI value would suggest.

Location: N 39° 47.400’ W 111° 52.000’

Date Time Secchi Depth TSI Weather 8/4/2009 8008:00 2 50. 0 Clear Average 2.0 50.0

11 Causey Reservoir Summary Data Volunteer Monitors: Paul and Nathan Baker Causey Reservoir is located on the South Fork of the Ogden River above Huntsville. The average Secchi measurement in Causey Reservoir for 2009 was 3.5m, which was slig ht ly hig her t han t he 2008 measurement o f 2. 3m. The average TSI val ue f or 2009 was 42.9. ULW data collected over the past 7 years indicate a mesotrophic state with values varying within the mesotrophic range.

Location: N 41° 17.500’ W 111° 35.010’ Slightly Southeast of dam, where the three arms of the reservoir converge

Date Secchi Depth TSI 6/12/2009 2.5 46.8 7/17/2009 5.6 35.2 8/23/2009 2.5 46.8 Average 353.5 42. 9

12 Deer Creek Reservoir Summary Data Volunteer Monitor: Dawn Larsen

Deer Creek Reservoir is located at the top of Provo Canyon in northern Utah. Much of the water for the Wasatch Front comes from this reservoir and it is a pppopular recreation destination (Judd, 1997). The average Secchi measurement in Deer Creek Reservoir for 2009 was 5.0m giving an average TSI value of 37.1. Deer Creek Reservoir shows as being in an oligotrophic state with recent years showing a decrease in TSI values.

Location: N40N 40° 24. 429’ W 111 ° 31. 621’ Right next to the dam.

Date Time Secchi Depth TSI Weather 6/19/2009 18:00 6 34.2 Clear 6/25/2009 17:00 5.8 34.7 Clear 6/27/2009 13:30 5 36.8 Clear 7/3/2009 13:00 5.0 36.8 Overcast 7/12/2009 11:20 4.5 38.3 Clear 9/5/2009 13:16 3.6 41.5 Overcast Average 5.0 37.1

13 Grantsville Reservoir Summary Data Volunteer Monitors: Mike Enright

Grantsville Reservoir is located at the base of the Stansbury mountains in western Utah. The reservoir water is used for irrigation and recreational fishing. The average Secchi measurement in Grantsville Reservoir for 2009 was 2 .6m giving an average TSI value of 46.5. Grantsville Reservoir is in a mesotrophic state.

Location: N 40° 32.568’ W 112° 30.370’ Middle of reservoir.

Date Time Secchi Depth TSI Weather 7/14/2009 18:30 2.55 46.5 Clear Average 2.6 46.5

14 Hyrum Reservoir Summary Data Volunteer Monitor: Steve Bullock Hyrum Reservoir is in Cache Valley, Utah. The reservoir provides recreation, water storage, and wetland habitat (Judd, 1997). The average Secchi measurement in Hyrum Reservoir f or 2009 was 1 .5m. Th e average TS I va lue was 53 .9 . Past d ata coll ected b y th e DWQ and the ULW indicate a steady mesotrophic state, while this years data shows a eutrophic state. TSI values have steadily increased over the past 5 years.

Location: N 41° 37.460’ W 111° 52.016’ Middle of lake, just South of marina.

Date Time Secchi Depth TSI Weather 8/1/2009 14:30 1.6 53.2 Clear 8/9/2009 19:30 1.4 55.2 Clear 9/6/2009 16:00 1.6 53.2 Clear Average 1.5 53.9

15 Otter Creek Reservoir Summary Data Volunteer Monitor: James Lowe / Heather Allen

Otter Creek Reservoir is located about 20 miles south of Koosharem. It is a large, shallow reservoir used for fishing, swimming, and agricultural needs (Judd,1997). The TSI value for 2009 was 53.2 meaning it is in a eutrophic state. TSI values have remained consistent for many years at Otter Creek. Depths this year varied with the highest being recorded in late July.

Location: N 38° 12.520’ W 111° 59.170’

Date Time Secchi Depth TSI Weather 7/8/2009 11:30 1.4 55.2 Clear 7/16/2009 12:15 1.8 51.5 Clear 7/28/2009 12:05 2.2 48.6 Clear 8/4/2009 10:25 1531.53 53. 9 Overcast 8/18/2009 12:00 1.25 56.8 Clear Average 1.6 53.2

16 Pineview Reservoir 1 Summary Data Volunteer Monitor: Keith Rounkles

Pineview Reservoir is located on the Ogden River at the top of Ogden Canyon. With its close proximity to urban areas, Pineview Reservoir offers four season recreational opportuniti es ( Judd , 199 7) . Th e average S ecchi measurement at si te one i n 2009 was 4.8m. The average TSI value was 37.6. This TSI value is quite a bit higher than last year, possibly due to higher lake levels. Past Secchi measurements collected by the DWQ and the ULW program indicate a fairly steady mesotrophic state. This years data indicate it is in an oligotrophic state.

Location: 41° 15.330’ W 111° 49.280’ Right at the spillway.

Date Time Secchi Depth TSI Weather 7/1/2009 10: 00 565.6 35. 2 Clear 7/2/2009 19:00 5.1 36.5 Clear 8/3/2009 10:00 4.8 37.4 Clear 8/17/2009 9:00 4.4 38.7 Clear 8/31/2009 10:00 4.4 38.7 Clear 9/15/2009 10:00 4.3 39.0 Clear Average 4.8 37.6

17 Pineview Reservoir 2 Summary Data Volunteer Monitor: Craig Haaser

Pineview Reservoir site two showed similar results to site one. The average Secchi depth for s ite t wo was 4 43.3m h avi ng a TSI val ue of f390 39.0. Thi s i s somewh at thih higher, b ut very cl ose to the results for site one. This could be due to measurements being taken earlier in the year which had lower depth values possibly due to spring algal blooms.

Location: 41° 15.330’ W 111° 49.280’ Right at the spillway.

Date Time Secchi Depth TSI Weather 5/31/2009 15:30 2.1 49.3 Partly Cloudy 6/17/2009 19:45 2.7 45.7 Overcast 7/5/2009 10:07 5.7 34.9 Clear 7/23/2009 16:00 4.5 38.3 Clear 8/9/2009 15:20 4.6 38.0 Clear 8/23/2009 10:30 5.2 36.2 Overcast 9/6/2009 11:00 5.2 36.2 Partly Cloudy 9/20/2009 11:00 4.3 39.0 Clear Average 4.3 39.7

18 Red Fleet Reservoir Summary Data Volunteer Monitor: Mike Murray Red Fleet Reservoir is located at the base of the Uinta mountains in eastern Utah. It is a state park with full recreational facilities (Judd, 1997). The average Secchi measurement in Red Fleet Reservoir for 2009 was 1.8m. The average TSI was 52.4. This is somewhat higher than 2008, and follows the trend of rising TSI values for the last few years. The lowest depth values were recorded in July with depths increasing in August. Red Fleet is in a eutrophic state.

Location: N 40° 34.449’ W 109° 25.448’ In front of the dam, 200 feet from the bank.

Date Time Secchi Depth TSI Weather 6/13/2009 12:00 2.21 48.6 Clear 7/9/2009 11:00 1.07 59.0 Clear 7/26/2009 11:00 0.9 61.5 Partly Cloudy 8/18/2009 11:00 2.35 47.7 Partly Cloudy 8/25/2009 11:00 2.8 45.2 Partly Cloudy 9/1/2009 11:00 2.2 48.6 Partly Cloudy 9/16/2009 13:00 1.3 56.2 Clear Average 1.8 52.4

19 Red Fleet State Park Map

Location: N 40° 11.465’ W 110° 26.681’ Right next to the dam.

Date Time Secchi Depth TSI Weather 4/6/2009 12:00 7 32.0 Clear 4/19/2009 12:00 6.9 32.2 Clear 5/11/2009 12:00 8.3 29.5 Partly Cloudy 5/23/2009 12:00 7.5 31.0 Partly Cloudy 6/6/2009 12:00 4.7 37.7 Partly Cloudy 6/24/2009 12:00 5.2 36.2 Partly Cloudy 6/27/2009 12:00 3.9 40.4 Clear 7/4/2009 12:00 2.2 48.6 Clear 7/19/2009 12:00 3.1 43.7 Clear 8/1/2009 12:00 3.6 41.5 Clear 8/10/2009 12:00 3.2 43.2 Clear 8/16/2009 14:00 4.7 37.7 Clear 8/24/2009 16:30 6.7 32.6 Overcast 8/29/2009 15:50 4 40.0 Overcast 9/5/2009 13:50 5.3 36.0 Partly Cloudy Average 5.1 37.5

20 Steinaker Reservoir Summary Data Volunteer Monitor: Mike Murray

Steinaker Reservoir is located north of Vernal, Utah. As a state park, the reservoir offers year round recreational opportunities (Judd, 1997). The average Secchi measurement in Steinaker Reservoir for 2009 was 3.1m giving an average TSI value of 44.3. According to ULW data, Steinaker Reservoir is in a mesotrophic state.

Location: N 40° 30.423’ W 109° 31.918’ In front of the dam, 200 yards from the bank. Date Time Secchi Depth TSI Weather 6/13/2009 9:30 3.2 43.2 Clear 7/9/2009 9:00 4.5 38.3 Clear 7/26/2009 9:00 2.1 49.3 Overcast 8/17/2009 9:00 3.65 41.3 Clear 8/26/2009 9:00 3.45 42.2 Partly cloudy 9/1/2009 9:30 242.4 47. 4 Clear 9/16/2009 9:50 2.2 48.6 Clear Average 3.1 44.3

21 Utah Lake 1 Summary Data Volunteer Monitor: Allen Palmer

Utah Lake is a very large fresh water lake that occupies a large portion of Utah Valley. Despite its large size, it is a shallow lake with an average depth of only about 10 feet. Recreational uses include camping, boating, fishing, skiing, and picnicking (Judd, 1997). The average Secchi depth for site one in 2009 was 0.3m with a TSI value of 76.2. The lake is classified as hypereutrophic.

Location: N 40° 10.031’ W 111° 45.241’ Just West of point located to the Southwest of Provo Bay.

Date Time Secchi Depth TSI Weather 6/3/2009 12:35 0.30 77.3 Partly Cloudy 6/30/2009 11:55 0.38 73.9 Clear 7/15/2009 11:15 0.41 72.8 Clear 8/13/2009 9:40 0.24 80.6 Clear Average 0.3 76.2

22 Utah Lake 2 Summary Data Volunteer Monitors: Richard and Bruce Edwards

Site two for Utah Lake showed similar results to site one. The average Secchi depth was 0.3m. The TSI for site two was 77.2, which confirms that Utah Lake is in a hypereutrophic state.

Location: N 40° 10.701’ W 111°41.797’ South end of Provo Bay.

Date Time Secchi Depth TSI Weather 6/19/2009 14:00 0.35 75.1 Clear 7/3/2009 12:00 0.4 73.2 Partly Cloudy 7/23/2009 12:00 0.2 83.2 Clear Average 0.3 77.2

23 Yuba Reservoir Summary Data Volunteer Monitor: Chris Evans

Yuba Reservoir is located south of Nephi, Utah. It is a state park and provides a variety of recreational opportunities for visitors includin g fishing, boating, cam pin g, and swimming . The average Secchi measurement in Yuba Reservoir for 2009 was 1.3m and the average TSI value was 57.4. According to ULW data, Yuba Reservoir fluctuates between mesotrophic and eutrophic states. In 2009, the TSI value shows a eutrophic state.

Location: N 39° 22.281’ W 112° 01.890’ Near the spillway.

Date Time Secchi Depth TSI Weather 6/7/2009 17:15 1.52 54.0 Partly Cloudy 6/21/2009 20: 15 1651.65 52. 8 Clear 7/5/2009 18:00 1.58 53.4 Partly Cloudy 7/19/2009 21:00 1.25 56.8 Partly Cloudy 8/2/2009 18:15 1.21 57.3 Partly Cloudy 8/16/2009 17:42 0.78 63.6 Clear 8/30/2009 11:00 0.77 63.8 Overcast Average 1.3 57.4

24 Appendix A

25 Lake/Reservoir Volunteer Date Time Weather Secchi Depth TSI

Bear Lake 1 Scott Tolentino / Erin Gittinger 25-Jun-09 11:00 Partly Cloudy 6.30 33.5 Bear Lake 1 Scott Tolentino / Erin Gittinger 30-Jun-09 9:00 Clear 7.50 31.0 Bear Lake 1 Scott Tolentino / Erin Gittinger 8-Jul-09 10:45 Clear 6.70 32.6 Bear Lake 1 Scott Tolentino / Erin Gittinger 17-Aug-09 13:30 Partly Cloudy 5.10 36.5 Bear Lake 1 Scott Tolentino / Erin Gittinger 24-Aug-09 11:00 Overcast 6.10 33.9 Bear Lake 1 Scott Tolentino / Erin Gittinger 8-Sep-09 10:00 Clear 6.20 33.7 Average 6.3 33.5

Bear Lake 2 Kate Pretorius 24-May-09 14:15 Rain 2.75 45.4 Bear Lake 2 Kate Pretorius 31-May-09 18:30 Rain 2.40 47.4 Bear Lake 2 Kate Pretorius 8-Jun-09 14:05 Rain 2.57 46.4 Bear Lake 2 Kate Pretorius 14-Jun-09 15:45 Overcast 2.98 44.3 Bear Lake 2 Kate Pretorius 21-Jun-09 14:10 Rain 2.76 45.4 Bear Lake 2 Kate Pretorius 30-Jun-09 16:30 Clear 3.12 43.6 Bear LkLake 2 KtKate PtiPretorius 5-JlJul-09 16: 05 Clear 3153.15 43. 5 Bear Lake 2 Kate Pretorius 12-Jul-09 11:45 Clear 3.06 43.9 Bear Lake 2 Kate Pretorius 20-Jul-09 16:30 Clear 3.14 43.5 Bear Lake 2 Kate Pretorius 26-Jul-09 14:00 Clear 3.08 43.8 Bear Lake 2 Kate Pretorius 2-Aug-09 17:10 Clear 3.12 43.6 Bear Lake 2 Kate Pretorius 10-Aug-09 17:15 Clear 3.08 43.8 Average 2.93 44.5

Burreston Pond Scott and Bunny Andrews 4-Aug-09 8:00 Clear 2.00 50.0 Average 2.00 50.0

Causey Reservoir Paul and Nathan Baker 12-Jun-09 2.50 46.8 Causey Reservoir Paul and Nathan Baker 17-Jul-09 5.60 35.2 Causey Reservoir Paul and Nathan Baker 23-Aug-09 2.50 46.8 Average 3.5 42.9

Deer Creek Reservoir Dawn Larsen 19-Jun-09 18:00 Clear 6.00 34.2 Deer Creek Reservoir Dawn Larsen 25-Jun-09 17:00 Clear 5.80 34.7 Deer Creek Reservoir Dawn Larsen 27-Jun-09 13:30 Clear 5.00 36.8 Deer Creek Reservoir Dawn Larsen 3-Jul-09 13:00 Overcast 5.00 36.8 Deer Creek Reservoir Dawn Larsen 12-Jul-09 11:20 Clear 4.50 38.3 Deer Creek Reservoir Dawn Larsen 5-Sep-09 13:16 Overcast 3.60 41.5 Average 5.0 37.1

Grantsville Reservoir Mike Enright 14-Jul-09 18:30 Clear 2.55 46.5 Average 2.6 46.5

Hyrum Reservoir Steve Bullock 1-Aug-09 14:30 Clear 1.60 53.2 Hyrum Reservoir Steve Bullock 9-Aug-09 19:30 Clear 1.40 55.2 Hyrum Reservoir Steve Bullock 6-Sep-09 16:00 Clear 1.60 53.2 Average 151.5 53. 9

26 Lake/Reservoir Volunteer Date Time Weather Secchi Depth TSI

Otter Creek Reservoir James Lowe / Heather Allen 8-Jul-09 11:30 Clear 1.40 55.2 Otter Creek Reservoir James Lowe / Heather Allen 16-Jul-09 12:15 Clear 1.80 51.5 Otter Creek Reservoir James Lowe / Heather Allen 28-Jul-09 12:05 Clear 2.20 48.6 Otter Creek Reservoir James Lowe / Heather Allen 4-Aug-09 10:25 Clear 1.53 53.9 Otter Creek Reservoir James Lowe / Heather Allen 10-Aug-09 12:00 Clear 1.25 56.8 Average 1.64 53.2

Pineview Reservoir 1 Keith Rounkles 1-Jul-09 10:00 Clear 5.60 35.2 Pineview Reservoir 1 Keith Rounkles 2-Jul-09 19:00 Clear 5.10 36.5 Pineview Reservoir 1 Keith Rounkles 3-Aug-09 10:00 Clear 4.80 37.4 Pineview Reservoir 1 Keith Rounkles 17-Aug-09 9:00 Clear 4.40 38.7 Pineview Reservoir 1 Keith Rounkles 31-Aug-09 10:00 Clear 4.40 38.7 Pineview Reservoir 1 Keith Rounkles 15-Sep-09 10:00 Clear 4.30 39.0 Average 4.77 37.6

Pineview Reservoir 2 Craig Haaser 31-May-09 15:30 Partly Cloudy 2.10 49.3 Pineview Reservoir 2 Craig Haaser 17-Jun-09 19:45 Overcast 2.70 45.7 Pineview Reservoir 2 Craig Haaser 5-Jul-09 10:07 Clear 5.70 34.9 Pineview Reservoir 2 Craig Haaser 23-Jul-09 16:00 Clear 4.50 38.3 Pineview Reservoir 2 Craig Haaser 9-Aug-09 15:20 Clear 4.60 38.0 Pineview Reservoir 2 Craig Haaser 23-Aug-09 10:30 Overcast 5.20 36.2 Pineview Reservoir 2 Craig Haaser 6-Sep-09 11:00 Partly Cloudy 5.20 36.2 Pineview Reservoir 2 Craig Haaser 20-Sep-09 11:00 Clear 4.30 39.0 Average 4.3 39.7

Red Fleet Reservoir Mike Murray 13-Jun-09 12:00 Clear 2.21 48.6 Red Fleet Reservoir Mike Murray 9-Jul-09 11:00 Clear 1.07 59.0 Red Fleet Reservoir Mike Murray 26-Jul-09 11:00 Partly Cloudy 0.90 61.5 Red Fleet Reservoir Mike Murray 18-Aug-09 11:00 Partly Cloudy 2352.35 47. 7 Red Fleet Reservoir Mike Murray 25-Aug-09 11:00 Partly Cloudy 2.80 45.2 Red Fleet Reservoir Mike Murray 1-Sep-09 11:00 Partly Cloudy 2.20 48.6 Red Fleet Reservoir Mike Murray 16-Sep-09 13:00 Clear 1.30 56.2 Average 1.83 52.4

27 Lake/Reservoir Volunteer Date Time Weather Secchi Depth TSI

Starvation Reservoir Mike Nealley 6-Apr-09 12:00 Clear 7.00 32.0 Starvation Reservoir Mike Nealley 19-Apr-09 12:00 Clear 6.90 32.2 Starvation Reservoir Mike Nealley 11-May-09 12:00 Partly Cloudy 8.30 29.5 Starvation Reservoir Mike Nealley 23-May-09 12:00 Partly Cloudy 7.50 31.0 Starvation Reservoir Mike Nealley 6-Jun-09 12:00 Partly Cloudy 4.70 37.7 Starvation Reservoir Mike Nealley 24-Jun-09 12:00 Partly Cloudy 5.20 36.2 Starvation Reservoir Mike Nealley 27-Jun-09 12:00 Clear 3.90 40.4 Starvation Reservoir Mike Nealley 4-Jul-09 12:00 Clear 2.20 48.6 Starvation Reservoir Mike Nealley 19-Jul-09 12:00 Clear 3.10 43.7 Starvation Reservoir Mike Nealley 1-Aug-09 12:00 Clear 3.60 41.5 Starvation Reservoir Mike Nealley 10-Aug-09 12:00 Clear 3.20 43.2 Starvation Reservoir Mike Nealley 16-Aug-09 14:00 Clear 4.70 37.7 Starvation Reservoir Mike Nealley 24-Aug-09 16:30 Overcast 6.70 32.6 Starvation Reservoir Mike Nealley 29-Aug-09 15:50 Overcast 4.00 40.0 Starvation Reservoir Mike Nealley 5-Sep-09 13:50 Partly Cloudy 5305.30 36. 0 Average 5.1 37.5

Steinaker Reservoir Mike Murray 13-Jun-09 9:30 Clear 3.20 43.2 Steinaker Reservoir Mike Murray 9-Jul-09 9:00 Clear 4.50 38.3 Steinaker Reservoir Mike Murray 26-Jul-09 9:00 Overcast 2.10 49.3 Steinaker Reservoir Mike Murray 17-Aug-09 9:00 Clear 3.65 41.3 Steinaker Reservoir Mike Murray 26-Aug-09 9:00 Partly cloudy 3.45 42.2 Steinaker Reservoir Mike Murray 1-Sep-09 9:30 Clear 2.40 47.4 Steinaker Reservoir Mike Murray 16-Sep-09 9:50 Clear 2.20 48.6 Average 3.1 44.3

Utah Lake 1 Allen Palmer 3-Jun-09 12:35 Partly Cloudy 0.30 77.3 Utah Lake 1 Allen Palmer 30-Jun-09 11:55 Clear 0.38 73.9 Utah Lake 1 Allen Palmer 15-Jul-09 11:15 Clear 0.41 72.8 Utah Lake 1 Allen Palmer 13-Aug-09 9:40 Clear 0.24 80.6 Average 0.33 76.2

Utah Lake 2 Richard and Bruce Edwards 19-Jun-09 14:00 Clear 0.35 75.1 Utah Lake 2 Richard and Bruce Edwards 3-Jul-09 12:00 Partly Cloudy 0.40 73.2 Utah Lake 2 Richard and Bruce Edwards 23-Jul-09 12:00 Clear 0.20 83.2 Average 0.32 77.2

Yuba Reservoir Chris Evans 7-Jun-09 17:15 Partly Cloudy 1521.52 54. 0 Yuba Reservoir Chris Evans 21-Jun-09 20:15 Clear 1.65 52.8 Yuba Reservoir Chris Evans 5-Jul-09 18:00 Partly Cloudy 1.58 53.4 Yuba Reservoir Chris Evans 19-Jul-09 21:00 Partly Cloudy 1.25 56.8 Yuba Reservoir Chris Evans 2-Aug-09 18:15 Partly Cloudy 1.21 57.3 Yuba Reservoir Chris Evans 16-Aug-09 17:42 Clear 0.78 63.6 Yuba Reservoir Chris Evans 30-Aug-09 11:00 Overcast 0.77 63.8 Average 1.3 57.4

28 Appendix B

29 Summary of lakes monitored by Utah Lake Watch since 2002

Reservoir/Lake County 2002 2003 2004 2005 2006 2007 2008 2009

Bear Lake Site 1 Rich/Bear Lake XXXXX XX Bear Lake Site 2 Rich/Bear Lake XXX Big East Lake Utah X Burreston Ponds Juab XX X Butterfly lake Duchesne: X Causey Reservoir Weber XXXXXXX Deer Creek Reservoir Wasatch X X X X X X East Canyon Reservoir Morgan XXXXX Flaming Gorge Reservoir Daggett X Frontier Lake X Grantsville Reservoir Tooele XXX Great Salt Lake (Antelope Davis/Weber/Box Elder/ Island) - Site 1 Salt Lake/Tooele XXX Davis/Weber/Box Elder/ GtSltLkSit2Great Salt Lake Site 2 SltLk/TSalt Lake/Tooel e X X X Huntington North Reservoir Emery XX X Hyrum Reservoir Cache XX XXXXX Jordanelle Reservoir Site 1 Wasatch XXX Jordanelle Reservoir Site 2 Wasatch X Jordanelle ReservoirSite 3 Wasatch X Ken's Lake Beaver X Newton Reservoir Cache X X Otter Creek Reservoir Piute XXXX XX Palisade Reservoir San Pete XX Pine View Reservoir Site 1 Weber XXXXXXXX Pineview Reservoir Site 2 Weber XX Piute Reservoir Piute XXX Quail Creek Reservoir Washington X Red Fleet Reservoir Uintah X XXX Rockport Reservoir Summit XX

Smith/Moorehouse Reservoir Summit XX Stansbury Lake Tooele XX Starvation Reservoir Duchesne: XX XXXXX Steinaker Reservoir Uintah XXXX Strawberry Reservoir Wasatch X Tomahawk Lake X Tony Grove Lake Cache X Trial Lake Summit/Wasatch X Utah Lake Site 1 Utah XXXX Utah lake Site 2 Utah XX Vernon Reservoir Tooele XX Wide Hollow Reservoir Garfield XXX Willard Bay (Watkins Res.) Box Elder X X X X Willow Pond Cache X Yuba Reservoir Juab XXXXXXX

30