2.82

05-18-2026

Lake elevation = 903.17 feet above sea level.

2.82

05-14-2026

Lake Elevation = 903.17 feet above sea level.

3.10

05-06-2026

Lake Elevation = 903.59 feet above sea level.

2.85

05-04-2026

Lake Elevation = 903.25 feet above sea level.

3.08

05-01-2026

Lake Elevation = 903.42 feet above sea level.

3.08

04-30-2026

Lake Elevation = 903.46 feet above sea level.

2.88

04-29-2026

Lake Elevation = 903.21 feet above sea level

2.85

04-27-2026

Lake elevation is 903.20 feet above sea level. The lake level 0.43 feet above the spill elevation. This is the first time in approx. 3 years that the lake has spilled over the outflow.

2.10

04-24-2026

Lake elevation = 902.43 feet above sea level. Calm; 4 inches below spill elevation. Based on this result the staff gauge will read approx. 2.43 feet at a lake elevation of 902.77 feet (spill elevation). Three years ago the staff gauge would have read approx. 2.71 feet at the same elevation (a difference of 3.36 inches). This implies that staff gauge has settled or moved over the last three years. Recalibration of the gauge is likely required.

2.06

04-23-2026

Lake Elevation = 902.39 feet above sea level.

1.98

04-22-2026

Lake Elevation = 902.33 feet above sea level.

1.85

04-21-2026

Lake Elevation = 902.22 feet above sea level.

1.60

04-20-2026

Lake Elevation = 902.05 feet above sea level

0.48

04-16-2026

Lake Elevation = 900.90 feet above sea level

0.36

04-15-2026

Lake Elevation = 900.73 feet above sea level.

0.30

04-14-2026

Lake elevation = 900.70 feet above sea level. Note: Read entered on 4/12/26 of 1.5 feet is for Herrick Lake (HKL2) not for Hemlock (HLK2).

0.28

04-13-2026

Lake Elevation = 900.66 feet above sea level.

1.50

04-12-2026

0.10

04-10-2026

Lake elevation = 900.49 feet above sea level. Winds 4 mph - 6 mph 326° NW

0.00

04-09-2026

Staff gauge at 0.00. Approx. 0.05 feet higher than yesterday. Lake Elevation 900.46 feet above sea level. Wind Setup: Sustained winds 18-34 mph; Direction 195 deg SSW.

0.00

04-08-2026

Lake Elevation = 900.39 feet above sea level. Lake level is approx. -0.05 feet below 0.00 on staff gauge.

0.00

02-19-2026

Lake Elevation = 892.80 feet above sea level; Ice On.

0.00

08-19-2025

Staff gauge has been <0.00 since last measurement in July 2025. Current lake elevation = 898.1 feet above sea level.

0.00

07-18-2025

Lake Elevation/Level= 900.06 feet above sea level.

0.00

07-14-2025

Pressure sensor continuous read lake elevation = 900.32 feet above sea level.

0.20

07-09-2025

Continuous Pressure Sensor Lake Elevation = 900.47 feet above sea level.

0.60

06-30-2025

Pressure Sensor lake elevation = 900.79 feet above sea level.

0.70

06-16-2025

Pressure Sensor Lake Elevation = 900.91 feet above sea level.

0.56

06-13-2025

Pressure Sensor Lake Level = 900.77 feet above sea level

0.55

06-11-2025

Pressure Sensor Lake Elevation = 900.81 feet above sea level.

0.48

06-10-2025

Continuous Pressure Sensor Lake Elevation= 900.77 feet above sea level.

0.22

06-09-2025

Pressure Sensor lake level = 900.55 feet above sea level

0.20

06-02-2025

Continuous pressure sensor lake elevation = 900.53 feet above sea level.

0.10

05-30-2025

0.00

05-27-2025

Pressure Sensor Lake Elevation 900.2 feet above sea level.

0.00

08-19-2024

Pressure sensor lake elevation = 897.07 feet above sea level. Note that reads submitted on 4/17/24 and 6/18/24 are not for Hemlock Lake (HLK2). I suspect they are for HKL2.

1.24

06-18-2024

0.00

06-14-2024

Pressure Sensor lake elevation = 898.90 feet above sea level.

0.00

05-17-2024

Pressure Sensor Lake Elevation= 899.24 feet above sea level.

0.00

05-13-2024

Pressure sensor lake elevation = 899.21 feet above sea level.

0.00

05-09-2024

Continuous pressure sensor lake elevation is 899.19 feet above sea level. Water level is ~ 1 foot below 0.00 on staff gauge. THE PREVIOUS READING RECORDED ON 4/17/24 OF 1.340 FEET IS NOT FOR HLK2. I SUSPECT IT IS FOR HERRICK LAKE (HKL2) IN ILLINOIS.

1.34

04-17-2024

0.00

03-13-2024

Pressure Sensor Lake Elevation = 895.58 feet above sea level.

0.00

02-06-2024

Pressure Sensor Lake Elevation = 895.73 Ft above sea level.

0.00

10-19-2023

Pressure Sensor Lake Elevation = 897.08 feet

0.00

09-25-2023

Pressure Sensor lake elevation = 897.21 feet above sea level.

0.00

09-21-2023

Pressure sensor lake elevation = 897.35 feet above sea level.

0.00

09-11-2023

Pressure Sensor Lake Elevation = 897.80 feet above sea level.

0.00

08-29-2023

Pressure sensor lake elevation = 898.33 feet above sea level.

0.00

08-17-2023

Pressure Sensor Lake Elevation = 899.03 feet above sea level.

0.00

07-27-2023

Pressure Sensor Lake Elevation = 900.01 feet above sea level. Lake water level is currently about 0.15 inches below 0.00 on the staff gauge.

0.20

07-20-2023

pressure sensor lake elevation=900.37

0.45

07-13-2023

Pressure sensor lake elevation = 900.80 feet above sea level; windy day with waves

0.72

07-07-2023

Pressure Sensor Lake Elevation = 900.8 feet above sea level.

1.58

06-15-2023

Pressure sensor lake elevation = 901.80 feet above sea level.

2.08

06-02-2023

Pressure Sensor Lake Elevation = 902.25 feet above sea level

2.20

05-30-2023

Pressure Sensor Lake Elevation= 902.40 feet above sea level

2.40

05-25-2023

Pressure Sensor Lake Elevation = 902.54 feet above sea level.

2.40

05-18-2023

Pressure sensor lake elevation = 902.54 feet.

2.68

05-11-2023

Lake Level (Elevation) Pressure Sensor = 902.85 feet above sea level.

2.74

05-08-2023

Pressure sensor lake elevation is 902.91 feet above sea level. The lake is currently 0.11 feet above our designated spill elevation.

1.98

04-28-2023

Pressure Sensor Lake Elevation= 902.22 feet above sea level.

1.80

04-21-2023

Pressure Sensor lake elevation = 902.07 feet above sea level.

1.70

04-14-2023

Lake Level Pressure Sensor Elevation Read = 901.99 feet above sea level

1.60

04-10-2023

Pressure Sensor lake elevation = 901.87 feet above sea level.

1.06

04-06-2023

Pressure Sensor Lake Elevation = 901.35 feet

0.00

04-03-2023

Current lake elevation is 900.40 feet above sea level. From 7/27/22 until now the water level was below 0.00 on the staff gauge.

0.00

03-20-2023

Pressure sensor lake elevation = 898.10 feet above sea level.

0.00

01-23-2023

Pressure Sensor Lake Elevation= 897.08 Feet above sea level

0.00

12-14-2022

Pressure Sensor Lake Elevation = 894.28 feet above sea level.

0.00

11-29-2022

Pressure Sensor Lake Elevation = 894.56 feet above sea level

0.00

11-07-2022

Pressure Sensor Lake Elevation = 895.10 feet

0.00

11-04-2022

Pressure Sensor Lake Elevation = 895.23 feet

0.00

11-01-2022

0.00

10-31-2022

Pressure sensor lake elevation = 895.31 feet

0.40

10-28-2022

0.00

10-24-2022

Pressure Sensor Lake Elevation = 895.5 feet

0.00

10-18-2022

Pressure Sensor Elevation = 895.65 feet

0.43

10-16-2022

0.00

10-14-2022

Pressure Sensor Lake Elevation= 895.70 feet

0.00

10-07-2022

Pressure Sensor Lake Elevation = 895.80 feet

0.00

09-29-2022

Pressure sensor lake elevation = 895.8 feet.

0.00

09-20-2022

Pressure Sensor Lake Elevation = 896.00 feet above sea level

0.00

09-13-2022

Pressure Sensor Lake Elevation = 896.20 feet.

0.00

09-06-2022

Pressure Sensor Lake Elevation = 896.47 feet

0.00

09-01-2022

Pressure Sensor lake elevation = 896.82 feet. Staff gauge is currently on dry land. Since staff gauge installation the lake level has dropped 5.68 feet.

0.00

08-19-2022

Pressure Sensor lake elevation = 897.70 feet; Actual staff gauge depth (determined with tape measure) =14 inches below 0.00.

68.00

08-14-2022

0.00

08-11-2022

Pressure Sensor Lake Elevation = 898.76 feet

0.00

08-11-2022

Pressure Sensor lake elevation = 898.80 feet

0.00

08-05-2022

Pressure Sensor Lake Elevation = 899.31 Feet

0.00

08-03-2022

Pressure Sensor Lake Elevation = 899.64 feet

0.00

08-01-2022

Pressure Sensor Lake Elevation = 899.88 feet

0.00

07-28-2022

Lake Elevation = 900.13 feet above sea level

0.00

07-27-2022

Lake Elevation= 900.2 feet above sea level

0.06

07-25-2022

Pressure Sensor Level Sensor Elevation = 900.3 feet

0.06

07-22-2022

Pressure Sensor Lake Elevation = 900.3 feet.

0.16

07-22-2022

Lake Level from Pressure Sensor = 900.3 feet above sea level.

0.18

07-18-2022

Overcast; Target Monitoring Date; Windy; 1250; Lake Level from Pressure Sensor = 900.4 feet above sea level.

0.60

07-11-2022

Pressure Sensor Lake Elevation = 900.6 feet above sea level

0.60

07-11-2022

1.00

07-05-2022

Pressure Sensor Lake Elevation = 901.00 feet above sea level

1.24

07-01-2022

Lake Elevation from Pressure Sensor = 901.3 feet; Target monitoring date was on 7/2/22.

1.42

06-27-2022

Lake Elevation from pressure sensor= 901.6 feet. Target monitoring date was Saturday, 6/25/22.

2.08

06-16-2022

Lake Elevation- Pressure Sensor = 902.2 feet; Windy; Target Monitoring Date

2.16

06-09-2022

Lake Elevation - Pressure Sensor = 902.2 feet; Overcast; Target Monitoring Date

2.16

06-08-2022

Lake Elevation - Pressure Sensor = 902.2 feet

2.34

06-01-2022

project staff installed the gauge, survey point is lowest horizontal sealant expansion crack on concrete dyke referenced to 4 5/8" above the 3.30 marker on the gauge

2.34

06-01-2022

Lake Elevation - Pressure Sensor = 902.5 feet