MORPHOMETRIC DATA

Flushing Rate (yr¹)

1,012,016

Variable Milfoil

2010 MESOTROPHIC

3

0.9

8,138

9.9Max. Depth (m):

Mean Depth (m):

Volume (m³):

Watershed Area (Ac.):

Shore Length (m):

LOCKE LAKE, BARNSTEAD, NH

TROPHIC CLASSIFICATION KNOWN EXOTIC SPECIES

Year Trophic class

Surface Area (Ac.): 253

Elevation (ft): 639

P Retention Coef: 0.59

The Waterbody Report Card tables are generated from the DRAFT 2016 305(b) report on the status of N.H. waters, and are based on data collected from 2006-

2015. Detailed waterbody assessment and report card information can be found at www.des.nh.gov/organization/divisions/water/wmb/swqa/index.htm

Volunteer Lake Assessment Program Individual Lake Reports

2,039

Designated Use Parameter Category Comments

Phosphorus (Total) Slightly BadAquatic Life Data exceed water quality standards or thresholds for a given parameter by a small margin.

pH Slightly Bad Data periodically exceed water quality standards or thresholds for a given parameter by a small margin.

Oxygen, Dissolved Encouraging Limited data for this parameter predicts water quality standards or thresholds are being met; however more data are

necessary to fully assess the parameter.

Dissolved oxygen satura Encouraging Limited data for this parameter predicts water quality standards or thresholds are being met; however more data are

necessary to fully assess the parameter.

Chlorophyll-a Slightly Bad Data exceed water quality standards or thresholds for a given parameter by a small margin.

Escherichia coli No DataPrimary Contact Recreation No data for this parameter.

Cyanobacteria hepatoto Slightly Bad Cyanobacteria bloom(s).

Chlorophyll-a Encouraging Limited data for this parameter predicts water quality standards or thresholds are being met; however more data are

necessary to fully assess the parameter.

BEACH PRIMARY CONTACT ASSESSMENT STATUS

WATERSHED LAND USE SUMMARY

Fry, J., Xian, G., Jin, S., Dewitz, J., Homer, C., Yang, L., Barnes, C., Herold, N., and Wickham, J., 2011. Completion of the 2006 National Land Cover Database

for the Conterminous United States, PERS, Vol. 77(9):858-864. For larger image contact NHDES.

Escherichia coli Good Sampling data commonly meet water quality standards or thresholds for this parameter.LOCKE LAKE - WINCHESTER DRIVE BEACH

Escherichia coli Good Sampling data commonly meet water quality standards or thresholds for this parameter.LOCKE LAKE - POINT BEACH

Escherichia coli Good Sampling data commonly meet water quality standards or thresholds for this parameter.LOCKE LAKE - GEORGETOWN BEACH #6

Escherichia coli Cautionary Limited data for this parameter predicts exceedance of water quality standards or thresholds; however

more data are necessary to fully assess the parameter.LOCKE LAKE - NORTH BARNSTEAD ROAD

BEACH

Escherichia coli Bad Data periodically exceed water quality standards or thresholds for this parameter by a large margin.LOCKE LAKE - COLONY BEACH

Escherichia coli Very Good All sampling data meet water quality standards or thresholds for this parameter.LOCKE LAKE - VARNEY BEACH

Escherichia coli Very Good All sampling data meet water quality standards or thresholds for this parameter.LOCKE LAKE -N SHORE RD BEACH

Land Cover Category % Cover Land Cover Category % Cover Land Cover Category % Cover

Open Water 7.34

Developed-Open Space 9.43

Developed-Low Intensity 2.16

Developed-Medium Intensity 0.06

Developed-High Intensity 0

Barren Land 0.03

Deciduous Forest 11.87

Evergreen Forest 11.7

Mixed Forest 37.54

Shrub-Scrub 7.54

Grassland/Herbaceous 2.31

Pasture Hay 6.93

Cultivated Crops 0.96

Woody Wetlands 1.82

Emergent Wetlands 0.3

This epo t as ge e ated the NH DE“ Volu tee Lake Assess e t P og a VLAP . Fo o e i fo aio o ta t VLAP at - o sa a.stei e @des. h.go

Observations Refer to Ta le 1 and Histori al Deep Spot Data Graphi s) Conductivity/Chloride: Da “ite Rd., Colo I let, Colo at Wi dso , Colo “outh I lo , Re . Po ds I let, a d Rt. Fi e Po d Outlet o du i it a d hlo ide le els e e slightl ele ated a d g eate tha the state edia s, ho e e hlo ide le els e ai ed u h less tha the state h o i hlo ide sta da d. Mu oe I let o du i it a d

hlo ide le els e e u h lo e tha the othe staio s a d ot a o e a le el of o e . E. coli: E. oli le els e e ele ated a d u h g eate tha the state sta da d of ts/ L at Da “ite Rd., Rt. Fi e Po d Outlet, Colo I let, Colo at Wi dso , a d Colo “outh I lo o the Ma sa pli g e e t du i g a d follo i g sig ii a t sto s. Re-tesi g du i g d eathe i Jul e ealed E. oli le els had de eased to a a epta le a ge at Da “ite Rd. a d Rt. Fi e Po d Outlet. Total Phosphorus: Phospho us le els at Da “ite Rd. e e g eatl ele ated follo i g the Ma sto e e t sa pli g a d the de eased to ithi a ode ate le el i Jul . Rt. Fi e Po d Outlet phospho us le els e e ithi a slightl ele ated a ge ut e ai ed sta le f o Ma to Jul . Colo I let “outh I lo phospho us le els e e also slightl ele ated i Ma . Colo at Wi dso phospho us le els e e g eatl ele ated i Ma a d the i eased i Jul due to lo lo o diio s a d la ge a ou ts of dissol ed o ga i ate . Colo I let phospho us le els e e g eatl ele ated i Ma a d de eased slightl i Jul . Mu oe I let phospho us le els lu tuated ithi a ode ate le el a d e ai ed sta le f o Ma to Jul . Re . Po ds I let phospho us le els e e also g eatl ele ated i Ma a d the i eased g eatl i Jul a d la data ote o ga i ate i the sa ple that a ha e o t i uted to the ele ated phospho us. Turbidity: Rt. Fi e Po d Outlet, Colo I let “outh, a d Mu oe I let tu idit le els e e ithi lo to ode ate a ges. Da “ite Rd., Colo at Wi dso a d Re . Po ds I let tu idit le els e e slightl ele ated i Ma a d the i eased g eatl i Jul du i g d eathe a d lo lo s. Colo I let tu idit le els e e slightl ele ated a d e ai ed elai el sta le f o Ma to Jul . pH: Da “ite Rd. a d Re . Po ds I let pH le els e e ithi the desi a le a ge . - . u its. All othe staio s had pH le els ithi a a idi to slightl a idi a ge a d pote iall ii al to the su i al of a uai life.

Volunteer Lake Assessment Program Individual Lake Reports

Locke Lake, Barnstead

7 Data Summary

NH Median Values: Media alues fo spe ii pa a ete s ge e ated f o histo i lake o ito i g data. Alkalinity: . g/L

Chlorophyll-a: . g/

Condu ivity: . u“/

Chloride: g/L

Total Phosphorus: ug/L

Transparen y: .

pH: .

NH Water Quality Standards: Nu e i ite ia fo spe ii pa a ete s. Results e eedi g ite ia a e o side ed a

ate ualit iolaio . Chloride: > g/L h o i

E. oli: > ts/ L – pu li ea h

E. oli: > ts/ L – su fa e ate s

Tur idity: > NTU a o e atu al le el pH: et ee . - . u less atu all o u i g

Recommended Actions: “p i g sto e e t sa pli g o u ed i Ma a d e ealed that sto ate u of a d lushi g of po d s ste s o t i utes to ele ated a te ia E. oli a d phospho us le els i the Colo I let t i uta s ste et ee the Rt. Fi e Po d Outlet a d he e Colo I let osses Da “ite Rd. The sa pli g did ot ide if spe ii sou e of a te ia, ho e e it is e ide t that sto ate u of a d lushi g of the Rt. Fi e Po d o t i utes to a te ia le els. Wildlife, pet aste a d ag i ultu e a e likel sou es. This t i uta s ste dis ha ges e t to Colo Bea h a d it is e o e ded to dis ou age s i i g at this pa i ula ea h a ea follo i g la ge sto e e ts as this lushes a te ia i to the ea h s i i g a ea a d ould e pote iall ha ful if s allo ed. E ou age dog o e s to pi k up pet aste hile alki g thei a i als as ell as f o a k a ds a d p ope l

dispose of it eithe lushi g do the toilet o th o i g it i the t ash. I iiate a “ oop the Poop Ca paig to help edu ate pet o e s. Fo o e i fo aio isit .des. h.go /o ga izaio /di isio s/ ate / / oastal/s oop_the_poop.ht . The Da “ite Rd. sa pli g staio also e pe ie ed ele ated a te ia a d phospho us le els follo i g the sto e e t. This highlights the eed to add ess sto ate u of f o pa ed oads, di t/g a el oads, ea hes, oadside dit hes, ul e ts, at h- asi s, a d p i ate p ope ies. DE“’ NH Ho eo e ’s Guide to “to ate Ma age e t a d Mai e

DEP’s Ca p Road Mai te a e Ma ual a e g eat esou es. “a pli g as ot o du ted i the lake i a d e e o e d sa pli g i the lake i . Co ta t the VLAP Coo di ato i the sp i g if ou ish to o du t addiio al sto e e t sa pli g.

“taio Na e Ta le . A e age Wate Qualit Data fo LOCKE LAKE-BARN“TEAD

Chlo ide Co d. E. Coli Total P Tu . pH

g/l u“/ MPN/ ML ug/l tu

Da “ite Rd. . . .

Colo I let . . .

Colo I let At Wi dso . . .

Colo I let “outh I lo . . .

Mu oe I let . . .

Re . Po ds I let . . .

Rt. Fi e Po d Outlet . . .