THREEMILE POND

Processing math: 100%

Data period: through 2017

Town	County	Delorme Map #	True Basin	Flushing Rate
CHINA	KENNEBEC	13	1	1 flushes/yr

Maximum Depth	Average Depth	Surface Area	Lake Volume	Drainage Area
11 m (37 ft)	5 m (16 ft)	458 ha (1,131 ac)	22,333,296 m³ (18,106 ac-ft)	24 km² (9.3 mi²)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

Water Chemistry and Trophic State Parameters

**Table Legend:**

**Color**: Color (SPU), **Alk**: Alkalinity (mg/l CaCO₃), **SpCon**: Specific Conductivity ( $\mu$ S/cm), pH: pH (standard units)

TP = Total Phosphorus ( $\mu$ g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

**SDT** = Secchi Disk Transparency (m) – **Min**: minimum value, **Avg**: average value, **Max**: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year
**Chl** = Chlorophyll-a ( $\mu$ g/L) – **Min**: minimum value, **Avg**: average value, **Max**: maximum value
Year	Color	Alk	SpCon	pH	TP-EC	TP-SG	TP-BG	TP-PG	SDT-Min	SDT-Avg	SDT-Max	SDT-n	SDT-b	Chl-Min	Chl-Avg	Chl-Max
1982								18	3.2	3.2	3.2	1		6.2	6.2	6.2
1988		16						18	3.0	3.1	3.2	2		2.8	6.8	10.2
2011									1.1	1.1	1.1	1

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color	Avg Alk	Avg SpCon	pH	Avg TP-EC	Avg TP-SG	Avg TP-BG	Avg TP-PG	SDT-Min	SDT-Avg	SDT-Max	SDT-n	Chl-Min	Chl-Avg	Chl-Max
	16						18	1.1	2.5	3.2	1.3	2.8	6.5	10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

	1988-08-05		1988-08-17
Depth (m)	TEMP	DO	TEMP	DO
0	28	8.5	23	7.5
1	28	8.5	23	7.4
2	27	8.6	23	7.5
3	26	8.9	23	7.3
4	25	8.6	23	6.9
5	23	4.6	22	2.2
6	22	1.2

Recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)