AD-RI56 364 NATIONAL PROGRAM FOR INSPECTION OF NON-FEDERAL DANS 1/IEAST DIKE ARLINGTON ..(U) CORPS OF ENGINEERS MALTHAMNA NEN ENGLAND DIV AUG 78

UNCLASSIFIED F/G 3/13 NL

Ill'lllllI///ll////olll/IIIINI IIIIIIIIIIII"

14

IIIJL 5 . 1111126

MICROCOPY RESOLUTION TEST CHARTNA11ONAL BUREAU OF SIANDARDS ISAA A

(o MERRIMACK RIVER BASIN(v)

SALEM, NEW HAMPSHIRE(oInrow,"

- EAST DIKE-- ARL,.CTON MILL RESERVOIR

NH 00027

PHASE I INSPECTION REPORT *

NATIONAL DAM INSPECTION PROGRAM

* T E

*1. .m e.,J~3f~J k J'JL 0 519850

DEPARTMENT OF THE ARMY

r. NEW ENGLAND DIVISION, CORPS OF ENGINEERS -

WALTHAM, MASS. 0'"1154 *1

AUGUST 1978 , .-- S

-*,5 -I (0 ,:,

i 5 5 ii i ii B - 0

RrpnnlCI)~ AT GOVFRNMENT FXPENSE

DISCLAIMER NOTICE

THIS DOCUMENT IS BEST QUALITYPRACTICABLE. THE COPY FURNISHEDTO DTIC CONTAINED A SIGNIFICANTNUMBER OF PAGES WHICH DO NOTREPRODUCE LEGIBLY.

0 IINCI ASSTETED -SECURITY CL ASSIFICATION OF THIS PAGE (When [Jots hnteved)

REPOT DCUMNTATON AGEREAD INSTRUCTIONSREPOT DCUMNTATON AGEBEFORE COMPLETING FORM

1. REPORT NUMBER Z2. GOVT ACCESSION NO. 3. RECIPIENT'S CATALOG NUMBER

NH 00027 1_______________

44. TITLE (and S.ublilI*J S. TYPE Of REPORT II PERIOD COVERED

East Dike Arlington Mill Reservoir INSPECTION REPORT

NATIONAL PROGRAM FOR INSPECTION OF NON-FEDERAL 6. PERFORMING ORG. REPORT NUMBER

DAMS_______________ _

7. AIJT)ORts) 11- CONTRACT OR GRANT NUMBIER(s)

U.S. ARMY CORPS OF ENGINEERSNEW ENGLAND DIVISION

9- PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMEN T. PROJECT, TASKAREA & WORK UNIT NUMBERS

11. CONTROLLING OFFICE NAME AND ADDRESS 12. R&PORT DATE

DEPT. OF THE ARMY, CORPS OF ENGINEERS August 1978NEW ENGLAND DIVISION, NEDED 13. NUMBER OF PAGES

424 TRAPELO ROAD, WALTHAM, MA. 02254 45IC MONITORING AGENCY NAME & AOORESS(UI differet from ConOiInli Offce) 15. SECURITY CLASS. (of this report)

UNCLASS I FIEDIts. OECL_ ASSI PIC ATION/DOWNGRADING7

SCmEDULE

16. DISTRIBUTION STATEMENT (of this Report)

APPROVAL FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED

17. DISTRIBUTION STATEMENT (of the abstract enteremd in AleaSk 20, if dtife"i temi Ate,11)

18. SUPPLEMENTARY NOTES

Cover program reads: Phase I Inspection Report, National Dam Inspection Program;however, the official title of the program is: National Program for Inspection of

* Non-Federal Dams; use cover date for date of report.

19. KEY WORDS (coninue en reverse side of necessary mnd Idetfyo blick uibe')

DAMS, INSPECTION, DAM SAFETY,

Merrimack River Basin* Salem, New Hampshire

Spicket River

20 ABSTRACT (Contilnue an reverse side It necessary ovid lIdentifY by block nmber)

The total length is 530 ft. with a height of 31 ft. The dike is in overallgood to fair condition. There is no evidence that the dike is unstable andno serious problems were detected. The hazard classification is significantto high, owing to its height and the volume of impounded water.

*DD I AN' 14731 LDITION 01 1 40V 65 IS OBSOLE T E

DEPAkRTMENT OF THE AIMY- NEW LNGLAN'D VjViS:ION, CORPS OF ENGINEERS

424 TRAFLO FPOAD

WALTHAM. MASSACHUSEFTTS 02154

Nf WSEP 2 81978

IHoor. l~ T.Id i~'homson, Jr.C'tv £W! (4Il S~ztt of New Hampshire

Sta. . hor

Cu. e rd, !,(2w' liw i sh iro 03301

Dear Govocrncr Thoison:

I a'm forwi-ditng- to you a copy of the East Dike Arlington Mill ReservoirPitqeI rsp~:I onRcport. whijch was prepared under the National Prog.ram

for Tnspection of Non,)-Teder;nl Dams. This report: IS pre~cunted fo- y'ouruse ond is, bnsx upon a vi!oial i1i-e,'tion , 3 ei" of the2 post perior-i..'iOC-1d)(1 n I ojtf F-rloIci~tudy (i7 f tlic., daa. A bi oef asscssn'eu t is includedat too e m~i of t P .- i(porl: I have approved the ry-r -t iind , un o0rtle. find in' )TInC] rec t2nfl!aic,:,- &,se ri bod i~n SectLion 7 and~ that youk:eep m niuc ot Chio atctiouns talkeni to im ceetthem. Thiis J oi).Ov-?-U,aCI Lin I& a1 V'i;;i) v ir-pcrr-cant part of this rog~

A copy of jul s re-port Ivs h-oon fomr.-ardel to the. Water ReCsourcoes bjoa1rd,the coopi:-ra::-in- at ,ency for the Stnte of Jrex 11arnshire . In addition, acopy of the report has also be-co furni shed tue. owner, Spicket- i;,ivr Co-rp.,550 TBroadwoy, Lawrenc, lrlassncbusett.r 01841.

Copis oif tbip rnver3t b.{1. c :nadc .xclbeto the pul'ic, iqpan request.by tLids off ico unde(Ir thle r,,doili of Inform.,ti Act. Intecasc, of thib,report Ohw release date Will be tllrty diavs fro;- tile dat, fti etr

1 %7l"11 to I al". tIs omiurtna i lt to thank you a,,.,! the Vater Resoures board!*for yonr cooperation in carrvinag out this pro,-frpwi.

Sincerely yours,

Jnr'l 3 0iLl I'. CA!7 statel Cn1oionel., Corpis of Ega-r

* w w w w w w w w w 0 q

EAST DIKE

s2 ARLINGTON MILL RESERVOIR

NH 00027

MERRIM4ACK RIVER BASIN* SALEM, NEW HAMPSHIRE

PHASE I INSPECTION REPORT- NATIONAL DAM INSPECTION PROGRAM

prreiofl For'rI isGRA&II C TAB

U;.-truiounced El

* -AvallLdhlity Code-sA,-iil rind/or

'DL!;t Special

* WK

PHASE I REPORT

NATIONAL DAM SAFETY PROGRAM

Name of Dam East Dike, Arlington Mill Reservoir

State Located New Hampshire

County Located Rockingham

City or Town Salem

Stream Spicket River

Date of Inspection 6/7/78 and 6/28/78

Brief Assessment

The East Dike of Arlington Mill'Reservoir is anearth fill saddle dike with concrete core wall extendingto bedrock. Total length is 530 feet, and height fromthe crest to the lowest point in the downstream swaleis 31 feet. The dike was built under the same contract

I as Wheeler Dam on Arlington Mill Reservoir and wascompleted in 1922. The dike has no spillway or dis-

* charge conduits, as these functions are performed atWheeler Dam.

The East Dike is in overall good to fair condi-- tion. There is no evidence that the dike is unstable

and no serious problems were detected. However, thedownstream face is covered with trees and shrubs, some

* of the trees being quite large. This could lead tofuture problems, in that tree roots can become seepage

* paths over time. There are also some areas of marsh* like grass on the downstream face, possibly indicatingS

the onset of seepage.

The reservoir test flood (equal to the probablemaximum flood) would overtop the East Dike by about one

* foot. Overtopping potential is judged as moderate.* Whether the structure would withstand this degree of0* overtopping is not certain. The hazard classification

of the East Dike is significant-to-high, owing to itsheight and the volume of impounded water.

0 W

It is recommended that the owner cut all trees onthe dike, and to retain a competent engineer to supervise

-~ IIremoval and backfill of the tree roots. Professionaladvice should also be sought to investigate the apparent Sseepage.

WHITMAN & HOWARD, INC.

-~,% NEW,".

1'SUNG. TING ~

No 3049

IS~tI

L

T. S.Cottn, PE P.E

=014

SCO rS

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............................................................. * .,...........

1iit. iPiatt I IfIpuctiuII Rijurt uii East Dike, Arlington Mill Reservoirhas been reviewed by the undersigned Review Board members. In our opinion,Llit: re~ported f idlntj! , concu. 1un uih dud rccutionendd itis areconI It;it WI wih the RetLoimiiL ide I IidLel ines fur Saf tI Itset: t I oilof ~DamIjg and with ju 'Uill ~u uduunTu prdtnt d 4 isi61'cby umittuJ for aproval.

CIA

ONI(, Foun~dation and4 MaLeritt Branch

Xo jrF.7 M~en~@Chief. Uctitjn Brefi(.h

EfiUltiitriU Ulvibtg

APPRUVAL LLUMtiLNJLL);

J0C a. VAR

PREFACE

U This report is prepared under guidance contained in theRecommended Guidelines for Safety Inspection of Dams, for Phase IInvestigations. Copies of these guidelines may be obtained fromthe Office of Chief of Engineers, Washington, D.C. 20314. Thepurpose of a Phase I Investigation is to identify expeditiouslythose dams which may pose hazards to human life or property. Theassessment of the general condition of the dam is based upon availabledata and visual inspections. Detailed investigation, and analysesinvolving topographic mapping, subsurface investigations, testing,and detailed computational evaluations are beyond the scope of aPhase I investigation; however. the investigation is intended to

N identify any need for such studies.

In reviewing this report, it should be realized that thereported condition of the dam is based on observations of field conditionsat the time of inspection along with data available to the inspectionteam. In cases where the reservoir was lowered or drained prior to

* inspection, such action, while improving the stability and safety ofthe dam, removes the normal load on the structure and may obscurecertain conditions which might otherwise be detectable if inspectedunder the normal operating environment of the structure.

It is important to note that the condition of a dam depends onnumerous and constantly changing internal and external conditions,and is evolutionary in nature. It would be incorrect to assume thatthe present condition of the dam will continue to represent thecondition of the dam at some point in the future. Only throughcontinued care and inspection can there be any chance that unsafeconditions be detected.

- Phase I inspections are not intended to provide detailed hydrologicand hydraulic analyses. In accordance with the established Guidelines,the Spillway Test flood is based on the estimated "Probable MaximumFlood" for the region (greatest reasonably possible storm runoff), orfractions thereof. Because of the magnitude and rarity of such a storm

* event, a finding that a spillway will not pass the test flood shouldnot be interpreted as necessarily posing a highly inadequate condition.The test flood provides a measure of relative spillway capacity andserves as an aide in determining the need for more detailed hydrologicand hydraulic studies, considering the size of the dam, its generalcondition and the downstream damage potential.

* w w w W W W W WW V 0

TABLE OF CONTENTS

PageI] "LETTER OF TRANSMITTAL

BRIEF ASSESSMENT

REVIEW BOARD SIGNATURE SHEET

PREFACE

TABLE OF CONTENTS

OVERVIEW PHOTO

LOCATION MAP

REPORT

SECTION 1 - PROJECT INFORMATIO4 1

SECTION 2 - ENG:NEERING DATA 6

SECTION 3 - VISUAL INSPECTION 7

SECTION 4 - OPERATIONAL PRUCEDURES 9

SECTION 5 - HYDRAULIC/HYDROLOGIC 10

SECTION 6 - STRUCTURAL STABILITY 12

SECTION 7 - ASSESSMENT, RECOMMENDATIONS, 13- AND REMEDIAL MEASURES S

APPENDIX A - VISUAL INSPECTION CHECK LISTS

APPENDIX B - ENGINEERING DATA

APPENDIX C - INSPECTION PHOTOGRAPHS S

APPENDIX D - HYDROLOGIC COMPUTATIONS

APPENDIX E - INFORMATION AS CONTAINED IN THENATIONAL INVENTORY OF DAMS* 0:

* S J

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x

PHASE I INSPECTION REPORT

EAST DIKE ARLINGTON MILL RESERVOIR

a NH 00028

SECTION 1

PROJECT INFORMATION

1.1 General

a. Authority

Public Law 92-367, August 8, 1972, authorized theSecretary of the Army, through the Corps of Engi-neers, to initiate a national program of dam in-spection throughout the United States. The NewEngland Division of the Corps of Engineers has

* been assigned the responsibility of supervisingthe inspection of dams within the New EnglandRegion. Whitman & Howard, Inc. has been retainedby the New England Division to inspect and reporton selected dams in the State of New Hampshire.Authorization and notice to proceed was issued to

* Whitman & Howard, Inc. under a letter of May 1,1978 from Ralph T. Carver, Colonel, Corps ofEngineers. Contract No. DACW33-78-C-0313 has beenassigned by the Corps of Engineers for this work.

b. Purpose

E (1) Perform technical inspection and evalua-tion of non-Federal dams to identifyconditions which threaten the publicsafety and thus permit correction in atimely manner by non-Federal interests.

(2) Encourage and assist the States toinitiate quickly effective dam safetyprograms for non-Federal dams.

(3) To update, verify and complete theNational Inventory of Dams.

1.2 Description of Project

a. Location - Wheeler Dam is located in the Townj g of Salem, N.H. on the Spicket River, a tribu- - -

tary of the Merrimack River. It impounds the 5Arlington Mill Reservoir. The dam appears onthe USGS quadrangle "Salem Depot, NH-Mass".

b. Description of Dam and Appurtenances - WheelerDam is a concrete gravity dam with earthabutments, built upon ledge. The concrete 0portion is approximately 500 feet long with amaximum structure height of 54 feet. A 100foot long spillway was built integrally withthe main dam, with a crest elevation of 160feet msl and a gross freeboard of 8 feet tothe top of the dam. A 2 foot flash board 6system is employed. Discharge is controlledfrom a gae house atop the dam with manualcontrols for three 48" steel conduits atdifferent elevations. These are two submer-

* ged intake portals which bring water fromdifferent depths. The total drainage area at 5the dam is 23.5 sq. mi., of which 17.1 sq.mi. is controlled thru the Big Island PondDam.

c. Size Classification - The volume of impoundedwater and height of the dike place thisproject at the bottom end of the "Intermediate"class.

d. Hazard Classification - If the East Dike were* to fail or be overtopped, flow would travel

east into Providence Hill Brook, then south,joining the Spicket River below Wheeler Dam.The Spicket River flows from there throughthe eastern part of Salem, past severalresidential developments, and thence through

* the urban areas of Methuen and Lawrence,Mass. The sluggish nature of the Spicket.River Valley would dissipate the flood wavefairly rapidly but not before considerabledamage was done. Some loss of life wouldprobably occur. Although the dike is not as

* hazardous as Wheeler Dam due to a lowerheight (31 ft. vs. 54 ft.), it is placed inthe same "Significant-to-High" classification.

2*' 5 5 5 55o

e. Ownership - Ownership and water rights areintegral with Wheeler Dam. Present owner isthe Spicket River Corp. of Lawrence, Mass.The dike has always been in the hands of theowners of the former Arlington Mills inLawrence.

f. Operator - Harlan Low550 BroadwayLawrence, Mass. 617/686-3846

g. Purpose of Dam - The East Dike was built inconjunction with Wheeler Dam and the WestDike to create Arlington Mill Reservoir. Thepurpose was to store water and regulate flowfor an industrial mill complex located on theSpicket River in Lawrence, Mass. 0

h. Design and Construction History - The EastDike was built under the same contract asWheeler Dam, and was completed in 1922.Chief engineer was H.K. Barrows of Boston,Mass.

i. Normal Operational Procedure(s) - No opera-tion as such.

1.3 Pertinent Data:

a. Drainage Areas

*. 23.5 square miles of which 17.1 square milesare controlled at Big Island Pond Dam.

b. Discharge at Damsite

No discharge at East Dike - see Wheeler Damreport for discharge data of Arlington MillReservoir.

c. Elevation (ft. above MSL)

(1) Top Dam - 169

(2) Maximum pool-design surcharge - 166

(3) Full flood control pool - N/A

a 3* * -S -.

(4) Recreation pool - 160 (top of WheelerDam flashboards 162.1)

| g (5) Spillway crest - No spillway

(6) Upstream portal invert diversion tunnel-None

Downstream portal invert diversiontunnel - None

(7) Streambed at centerline of dam - Approxi-mately 138 (not a stream-low point inswale)

d s(8) Maximum tailwater - No tailwater

d. Reservoir

(1) Length of maximum pool - Approximately11,000 feet

(2) Length of recreation pool - Approxi-mately 9,600 feet

(3) Length of flood control pool - N/A

e. Storage (acre-feet) -Not counting dead storage

(1) Recreation Pool - 3,300 (@ elev. 160)

(2) Flood Control Pool - N/A

, . (3) Design Surcharge - 5,000 (@ elev. 166)

(4) Top of Dam - 5,940 (@ elev. 169)

f. Reservoir Surface (acres)

(1) Top Dam - Estimated 320 acres

(2) Maximum pool - Estimated 300 acres

(3) Flood-control pool - N/A

* S (4) Recreation pool - Measured 266 acres @elev. 160

46 9"9 6 6 9 " -0

...............- i............i. • ...... ............

(5) Spillway crest - N/A

g. Dam

1' (1) Type - Earth embankment with concrete -core wall on ledge

(2) Length- 530 ft.

(3) Height - Maximum height 31 ft.- .(4) Top Width - 11'(5) Side Slopes - Upstream 3:1, Downstream

2-1/2:1

(6) Zoning - According to designer's report,upstream embankments of "imperviousearth fill carefully rolled" - downstreamembankments "of less carefully selectedmaterial but well compacted".

(7) Impervious Core - Concrete core wall onledge 0

(8) Cutoff - Concrete core wall on ledge

(9) Grout curtain - N/A

h. Diversion and Regulating Tunnel - None

i. Spillway - None

j. Regulating Outlets - None

5... - . .

SECTION 2: ENGINEERING DATA

I 0 2.1 Design "

The East Dike designed as a fairly simple embank-ment with concrete core wall built upon ledge.According to the designer's report, the upstreamembankment is of "impervious earth fill, carefullyrolled", downstream embankment of "less carefullyselected material but well compacted". See para-graph 1.2b and plate in Appendix B.

2.2. Construction

Photos and inspector's reports verify that the 0dike was constructed in a configuration accordingto the plans. Degree of compaction, soil andconcrete analyses are, however, unknown.

* ,Project was part of the Wheeler Dam job, and wasgenerally carried out in a professional manner.

2.3 Operation

No operation as such.

2.4 Evaluation

S.a. Availability - Set of construction plans (notvery detailed), designer's report, inspectionreports, and many photos are available from

-•owner and NH Water Resources Board.

b. Adequacy - Good. Major features well known -

details skimpy.

c. Validity - Good.

I ,• • • • O • • • • O •0

0 S

SECTION 3: VISUAL INSPECTION

-i '~ 3.1 Findings

a. General - No serious problems were detected.

b. Dam - The crest of the dam is covered withgrass and there is a footpath worn bare along

- the entire length of the crest.

The upstream slope is covered with riprap ingenerally good condition. There are a smallclump of birch trees and a few 4- to 5-inch

-- diameter stumps on the upstream slope nearthe southeast abutment, but the upstreamslope is otherwise clear of brush and trees.

The downstream slope of the dam is coveredwith brush and trees, some of which are quite

0 ' large.

From about 135 to 250 feet southeast of thenorthwest abutment there is an area of marsh-like grass, the upper limit of which wasabout 3 feet below the level of the water inthe reservoir at the time of the inspection.The ground was not noticeably wet or spongywhere this grass was growing at the time ofthe inspection. One footpath (or possibly amotorcycle path) has been worn bare betweenthe toe and crest of the downstream slope.

Two docks have been built adjacent to theupstream slope of the dike. At the southeastabutment, the contact with the upstream faceis only sparsely vegetated and appears tohave been used for boat launching.

Immediately downstream of the dam the groundis wet and soggy locally, but there was noevidence of seepage discharging at the timeof the inspection and it was possible to walkon foot everywhere.

One filled-in hole which appears to have beenan animal burrow, was seen on the downstreamface.

C. Appurtenant Structures - N/A

7

.. : . . .-

- - - - - - - - - -

-l

d. Reservoir Area - Cottage development exten-sive

.j e. Downstream channel - N/A

3.2 Evaluation

There is no evidence from the visual examinationthat the dike is unstable.

- Trespassing has led to the development of a barepath along the crest of the dam, another bare pathfrom the crest to the toe of the downstream slope,and a sparsely vegetated area at the contactbetween the upstream slope and the southeast

- abutment. There is also an extensive growth ofbrushes and trees on the downstream slope, and 5evidence (in the form of moisture-loving vegeta-tion) that seepage may be discharging on thedownstream slope about 3 feet below the reservoirlevel at the time of the inspection. These con-ditions could lead to future problems if notremedied. 5.

8

o . . . ..

SECTION 4: OPERATIONAL PROCEDURES

rn ~ 4.1 Procedures - No operation as such. -

4.2 Maintenance of Dam - Occassional observation and

clean-up visits.

- 4.3 Maintenance of Operating Facilities - N/A

4.4 Description of any warning system in effect - None

4.5 Evaluation - Trees should not have been allowed togrow so large. Trespass should be discouraged

- more vigorously.

* "

- .

0' 0

i: .. .....

9 .-.

*

SECTION 5: HYDRAULIC/HYDROLOGIC

r~ ~5.1 Evaluation of Features

a. Design Data

Hydraulically, the East Dike is part of

Wheeler Dam. The top elevation of the EastDike is the same as for the earth embankmentsof Wheeler Dam (169). No hydraulic designcriteria is known for Wheeler Dam.

b. Experience Data

- There is no history of overtopping, and nosuch visual evidence. It is highly unlikely •that an overtopping would have gone unreported.

c. Visual Observations

There is nothing to observe from a hydraulicstandpoint.

d. Overtopping Potential

Since the East Dike is effectively a part of[ Wheeler Dam, the overtopping potential is

identical. The following section is verbatimfrom the Wheeler Dam Phase I report.

Reference is made to Appendix D for the hy-drologic computations performed as a part of

£ this report.

The peak inflow into Arlington Mill Reservoirof the Probable Maximum Flood (PMF) is com-puted to be about 22,300 cfs. The PMF is de-fined as the largest flood that can reasonably

*be expected to occur on a given stream at aselected point, or the flood that may beexpected from the most severe combination ofcritical meteorologic and hydrologic con-ditions that are reasonably possible in theregion.

10

. .. - " .. ,

• +.,. • . "" , .. . . . . . .'-'. . . . . . . . ! . .

For structures of the size and hazard classi-fication of Wheeler Dam, the "test flood" isgenerally selected as the full PMF. The testflood is that flood used to evaluate the hy-draulic adequacy of a project. The testflood for Wheeler Dam is chosen as the fullPMF.

If the upstream Big Island Pond Dam were toremain intact during the test flood condition,the peak inflow into Arlington Mill Reservoirwould be reduced from 22,300 cfs to about17,000 cfs, due to the surcharge storageeffect in Big Island Pond. However, it hasbeen determined that Big Island Pond Dam willlikely fail under flows well below this testflood. (See Phase I report for Big IslandPond Dam, NH 00470.) Therefore, the evalua-tion of the hydraulic adequacy of Wheeler Damshould not rely upon the surcharge effect ofBig Island Pond.

Assuming Wheeler Dam remains intact, the peakoutflow during the test flood would be about19,800 cfs, the reduction from the inflow of22,300 cfs being accounted for by the sur-charge storage effect of Arlington MillReservoir. At the moment of this peak out-flow, the water surface would be about 170.3ft. msl or 1.3 ft above the top of the earthembankments of Wheeler Dam and also those ofthe East Dike and West Dike.

£ The spillway capacity of Wheeler Dam, includ-ing the capacity of the three discharge con-duits and also the extra capacity of one footof flow over the main concrete portion, is

* computed to be about 12,600 cfs, or 64% ofthe peak outflow during the test flood.

* Overtopping potential is judged as moderate.

It must be mentioned that should Big IslandPond Dam fail suddenly in the later stages ofa severe flood (after building up a largehydraulic head) the impact of the resulting

S flood wave could wipe out Wheeler Dam and thetwo dikes.

° . ..S

e1

*

SECTION 6: STRUCTURAL STABILITY

6.1 Evaluation of Structural Stability S

a. Visual Observations - There is no evidence ofsettlement, cracks, boils or other structuralproblems. Minor areas of dampness should bechecked in future routine inspections.

b. Design and Construction Data - The evidenceindicates that the dike was professionallydesigned and well built.

- c. Operating Records - N/A

d. Post Construction Changes - Trees and shrubshave grown extensively on the downstreamface. Also, a small diameter plastic waterpipe, of unknown depth and backfill, has beentrenched through the top of the northwestabutment. A change such as this can lead to 0piping through the dam if the water levelrises above the bottom of the trench.

e. Seismic Stability - This dike is in Seismic[ Zone 2 and hence does not have to be evaluated

for seismic stability according to the OCE SRecommended Guidelines.

12

0 . . .e.

SECTION 7: ASSESSMENT, RECOMMENDATIONS,AND REMEDIAL MEASURES

7.1 Dam Assessment

a. Condition - The East Dike is in overall goodto fair condition, although a number ofactions should be undertaken as outlinedbelow.

b. Adequacy of Information - Fair to good.Principal features well known, althoughdetails are lacking.

c. Urgency - The recommendations and remedialmeasures should be carried out within 1 to 2 0years.

d. Necessity for Additional Investigations -Definitely no necessity. However, if Arling-ton Mill Reservoir is drained to inspectWheeler Dam, it is recommended that the EastDike be inspected briefly before refilling ofthe reservoir.

7.2 Recommendations

*1 The owner should: 0

a. Retain a competent engineer to investigate . -" the apparent seepage.

b. Cut all trees on the upstream and downstreamfaces and retain a competent engineer tosupervise the removal of trees, roots andreplacement with proper backfill.

C. Order the removal of the water pipe mentioned - -* in the report and retain a competent engineer

to specify a proper backfill after removal ofthe pipe.

d. Order the removal of the docks.

0 1

. .. . . . . .. .. . . . . .

7.3 Remedial Measures

a. Alternatives - N/A

i b. Operation & Maintenance Procedures

(1) The dike should henceforth be kept clearof all trees and shrubs. A dense growth .-of grass should be maintained.

(2) A more conscientious method of preventing 0trespass should be adopted.

(3) It is recommended that the owner adopt aprogram of regular observation visits bya responsible individual. Visits shouldbe at least weekly and a permanent logkept.

I

'* * +°"

0 0

-. ~~~14•"-"--"

0 5 S S " S S S -S S S S 5

EAST DIKE

ii APPENDI CES

*Appendix Description

A Visual Inspection Checkli.st -3 pp.

B Engineering Data

C Inspection Photographs with Index -8 Photographs

D Hydrologic Computations

-E Informationfas Contained in the NationalInventory ofDams

W 0

APPENDIX AVISUAL INSPECTION CHECK LIST

PARTY ORGANIZATIONEast Dike

POETArlington Mill Reservoir DAEJune 7, 1978*

10TIM 11:00 AM

WEATHER sny- warm

w~s ~v162.2 U~.noneDNS

- PARTY:

1. T.T. Chiang, W&H 6

2. J. Scott, W&H

*4. 9. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

- 5. 10.

0PROJECT FEATUJRE INSPECTED BY REMARKS

1. Entire Dike Chiang & Scott

20.

*Scn inpcto pefre eenxShe

Chc4itcmie.bevain fbt npcin

10.1

40 4F 0 0 0 0 0 0 0 0 4

* VISUAL INSPECTION CHECK LISTPARTY ORGANIZATION

East DikeArlington Mill Reservoir June 28, 1978*

PROJECT___________ DATE_______11:00 AM

TIE_____

WEATHER sunnfy - hot

.w.s. ELEV. 162.0 U.S.none DN.S.

PARTY:

1. J. Scott, W&H6.__________ _______

2. R. Hirschfeld, Geotiechnical 7 _________________

- ~Engineers, inc.

3. 8

4. 9

5.10

6PROJECT FEATURE INSPECTED BY REMAPXS

*Entire dike Scott & Hirschfeld

2.

5.

7.

*Second inspection -see previous sheet for first inspection details.

C2heck list combines observations of both inspec tions.

A- 2

* S S S S S 9 U 0

East Dike PERIODIC INSPECTION CHECK LIST

PROJECT Arlington Mill Reservoir DATE 6/7/78 & 6/28/78

PROJECT FEATURE Entire Dike NAME Entire party

DISCIPLINE NAME

AREA EVALUATED I CONDITION 0*DIKE LMBANKM4ENT

Crest Elevation OK

Current Pool Elevation 162.2 on 6/7; 162.0 on 6/280

Maximum -mpoundment to Date Unknown

Surface Cracks None

Pavement Condition No pavementNone

Movement or Settlement of CrestNone

Lateral Movement

Vertical Alignment OK

Horizontal Alignment OK

Condition at Abutment and at No concrete structures. Good condition aConcrete Structures abutments, except for trespassing and

sparseness of vegetation at southeast abu

Indications of Movement of ment. Many trees cover downstream slope,

Structural Items on Slopes some quite large. Small trees on upstreaface cut recently.*

Trespassing on Slopes No structural items

* Sloughing or Erosion of Slopes Footpath on downstream face. Two boator Abutments docks (temporary).

NoneRock Slope Protection-Riprap Riprap in good shape - well placed.

Failures

* Unusual Movement or Cracking at Noneor near Toes

Wet spot past toe at low point - probabl%Unusual Embankment or Downstream surface drainage, not seep. Area of wet-

Seepage type grass starting at elev. 159#, from135 ft. to 250 ft. from northwest abutmer

Piping or Boils None

Foundation Drainage Features None

Toe Drains None

* . Instrumentation System None*Plastic water line dug thru top of

. abutment - shallow. Also small area of fill.. A-3

" at NW abutment (for parking area? one car)

9P. .P . 6 S

APPENDIX B

EAST DIKE

ENGINEERING DATA

Plate - Plan and Section

N.H. Water Resources Board letter to owner, 2/24/75

N.H. Water Resources Board Dam Safety Inspection FormForm, 12/13/73

Photograph, 10/30/35

Construction photograph, 11/16/21 0

Chief Engineer's Design Memorandum, 7/31/20

[ S

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* 6

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S1... ... -- ' -_ WEST DIKE

• i EAST AND WEST DIKES

'"*" ::* - I ALIN,5TTCN MtLl F$SPVIR

I- - E* '-

......... . .. ...0- _ . .. : - .. - -

Greater Law.renca idustriat Corporation -a 530 BroadwayLavren~ce, MA 01840

?Z FE!"UAED -0 7H3 FOLLN TVG DAXS:

tRepair abt-eents.* Z. p a i badly eraded floor of chzuts a p il lwy<

*Da 4209.04 (Dike)- f-.0

.:Remove trees which have startad growing on' dike;.*,

DJam iIM9.5 (Weeler Reervoir)

:. -?air~ leakza t.bA-ou~h d= Located near Sate. 'nocze* 2. -pir scalling ooccre be f ae. it c t c~c aUI

Il. Repzir bac''Y s elied and cracked but~aztz.:. . . - 2* s ~ ~nae.at locativa w~eenw ncrete:iias been added (7-eft sgU~lwy)

3. e~-e-e-and- brush fro;; -3~ !.,a -o -~ :-'a :- *,-! .-

k4 eplzcc. left -ate s-teza.... ..-. *-.

Da-. ~09. 09 (CnbeLske

1> Pepar piltwaey -walls 4hcw s 1 3 Of deteriora tion...Z. .. Rem.etree9 from e~ar --.

zdljs

1P a0 0 0 0 a W 9 1

N. H. WATER RES0URCES BOARDConcord, f. ff. 03301

DA4 SAFETY IUSPECTION REPORT FORM

Town: _______________ Dam Number: %L,

Inspected by: Date: _ ____ ____97

Local name of dam or water body:__

Owner: - Address:

Owner -7* as--6t interviewed during inspection.

Drainage Area: _ _ _ sq. mi. Stream:

Pond Area: Acre, Storage Ac-Ft. Max. Head Ft.

Foundation: Type C' ., Seepage present at toe - Yes/L7

Spillway: Type , Freeboard over perm. crest:

Width , Flashboard height_ S

Max. Capacity c.f.s.

* Embankment: Type , Cover , .. Width__I Upstream slope_ _ to 1; Downstream slope to 1

Abutments: Type A4, Condition: Good, Fair, Poor

Gates or Pond Drain: Size /L e Capacity Type_____________

Lifting apparatus -Operational condition.,

Changes since construction or last inspection:_ _ _ __ _ __ _ _

Downstream development:_____

This da / would not be a menace if it failed.

Suggested reinspection date:

Remarks: , ,CVx r-) ce -

*f " I .."0.

......... ............ -'Llmlm...... i m""i , ,-

*SPICIKETT RIVER 1-11 SALEArlington Uil1JsOctober 30, 1.935

JLA-AA

3 0-

ARL=GTON =ISi RE3=-WIR

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ALINTON MIThL 5 REESEPSOIR

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ac SC. t.

6 3cCCom Srocav

'a 0 370 r

Memo-_drA b7 E. Z-3is Jv.7 '31, 3.920,accomparitzg letta= to I.. EEL.b±

* The general. extent o-2 this reser7oir is shown. on.

sheet 1019.45. it is located on Spiciret 3--9 ir. the tc~

of Salem am& 'will extend J6'=o= the riC±r-4t7 of ?,ree~e='s

* IllJ (buz-d a nm-be= o-f years ago aud. not rsbmilt) to

B- a 1-istaz a cf al.oct .3 =.1. h 9 -- " - a

area of Bpickat a±7e= tzibuta=7 to th-43 =ese=7oi= will be

Iabomt 22 3qax miles.

A-a pla~ed, the 19-7e1 of the pe~sart 33.611we7 5

ofte =a= da -ail be at ela7at4on 2.80 iat= a=- :±t

*mean sea 19791) and. the ca'pacity o-f the rsae_,oi= ihe-n

d~awm to elevation 140 .vill be abozzh 1,000 =±17..±or galla-ct.

The elevation of the ;zTeeent mill pcnd at taa o0d 1al

a 14-11 is ab~t 133. As noted fnthez-, It is -as=9d. to

a rt3*8 the s':I±11,y of the =ain &sm so that I ft. f~aa-

boa--I-s can be ca--±e-4 i~sixed, whica 4±1l iincSaae t-1e1

aaO1~ac!,t7, of the =Iserrci:= abcore, elev~ation 140 to a total

of abo'ut 1,IZO m± 4 o allJonz.

The watar area of ts ,aser~oi4_ a:, 91aerat-4^2.=

'Ill2 be a'bent 2710 a--=es.

* w U S V V V

t 3.Ia

In adition to the min dam near the ol 3heel1r

Xill, there will be required -o dciks at I p3lAes in the

S watershd4. Thea. are shown on sheet 1019.47 as the Zaat

and Went Dikes respecti-e1.

Borings and test pits have been =a" and. ledge

* rock located at both dam and dike sites.

As will be noted, a section of the highwa7 le.ading

from Salem to forth Salem is to be &iscontied and in len

of this a new road consrcte4 17ing easter17 from the East 0

Dike and connecting With e7±sating zads, which are also to

be reconstructed. The higa:7 at north Salz Will also

have to be raised for a few hundred feet, and. at at- least S

one oathe poizzt on the hglmha& ad.jacent to the reservoir a

slight fill made. These changes were anthazrzed. b7 the

!Town of Salem on 3Tu1 10, 1920.

* Details of the main d= are sh-n. on sheet 1019.46.

Its total length will be about 7ZC feet,. consisting of a

ic 1CC1W. sp-Ilixa alt 31. 1SO, and abon"14 '38O Aw.w. of bu=lkhead

secti o, all of concrate. The eor• ;oz--on of the con-

crete will be in the 2roTortion of 1-3-6, with occassional large

s : es, embedde& I= the canceta. "the exterior port±on.

a-of the concrete area to be in the no± of l-2--41. =is* emining ;oto fn of the dam at each en. -ill ccnsiat of

ear"h f 2. w lbh cac.ete co= -al!, the cc,-rete to be 1-3-6.

............ *-..,..

3 S

The rnxaIzmu heighet of the spilliay sectAon is aboot

28 ft. above ledge rock with a--st, at 31. 160, ar-ranged so a

that 12 inch .wooden flaahzboarft can be carriad. b7 wought

iron. pi=. The latter are proportioned so that they will

bend over and the flashboards go out if the head of water on

tUh crest of the dam rdaches 4 ft.

M -- bulkhead section, will hte a rwavzr~m helght

above bed rock at tha present river bed of abct 53 f2t. The

bil khead section for a length of 160 ft. near it3s hihest

portion will be curved upstbmam in plan, with a radins, on

the dovwitream side, of about 665 ft.

in the bulkhead section is to be a gate ha=e

ag ::rI,, -ih --T11 zr, tihree 4S inch ateal pipes set in the

concrete of the 4a=, each aranged with a 48 inch cir,,la.

sluice gate with gate control and lilt in the gate hoase a l,-IIthe top of the dam. The westerly pipe is Ltended for power Never

<-- doneuse of water, is to be arranged with racks and can be laterextended down stream a short_ distance to a suitable power

house. location. The other t-Q 4a inch. pipes are

,intended sor uSe in -eleasing water fomn the reserqvo--..

D0 33 (see sheet 1019.47) 0

East Dike

The Mast fli~r -Mill be about 530 f.long cc.str 4 a-of earth fill with concrete core wall. T"-e top of tdhe di a

•ia1 be a - 19, the oc of core w aZl !a7. Mze -M;3trse"a

. -2_._..........." " .. -............................... ..... ......-...-...................... -..

4

ball of the Uam is to be of imnpoxri~a eazrth till cazSfr.12

rolledl, the lownsaream half of less carettl1 selected

mateLzZl but well compacted. Me conazste cor wall is

to be iz the, p goportion of 1-3-6 arA to eoatn in.to ledge

or~ ±mperiomm fo~dxtion. Pnzther cletails are shown a,

the plan.

-- Me w=:u= heigbt of the ?Aat Dike above the

present szrftac is abot 31 .C

West Dike

Aa will be noted b7 reference to shoet 1019.47, .

this is a low saturer the pC58flT groud. level bei~g

on,7 a little below 31. 160 at the midA. a of the dike

local.i4on. The mazimum height of the &iks with tom. a'

*31. &96 ia about2 0 ft. This will, be of earth fill, as

noted on the plan, but without concrete core.N3

• "-

" -----C-1-2 " " .....

•.C• p • • • • • q

APPENDIX CEAST DIKE

INDEX TO INSPECTION PHOTOGRAPHS

Photo No. Description

1 Upstream face of dam looking southeast- from northwest abutment.

2 Photo taken from southeast abutment,showing two docks (one partially hiddenbehind trees), a clump of birch trees onthe upstream face of dike near southeastabutment, crest of dike with footpathalong crest, cable and damaged gateacross crest, and tree-covered down-stream slope with evidence of recentclearing of downstream slope near abut-ment (in foreground).

3 Several tree stumps, about 4 to 5 inchesin diameter (one to right of metal clip-board), near crest of upstream slopeclose to southeast abutment, as viewedfrom edge of reservoir.

4 Upstream slope of dike looking toward

northwest abutment, showing riprap.Brush has been cleared from upstreamslope.

*5 Plastic water pipe near northwest abut-ment, which is laid above ground up tothe top of the riprap on the upstreamface and below ground across the crestto a camp north of the northwest abut-ment.

6 Photo taken from low point of channeldownstream of dam looking toward north-west abutment. Large trees and brushgrowing on downstream slope. Vegetationcharacteristic of wet areas growing

0 downstream of toe of dike. (Valleydownstream of toe is wet and soggylocally, but there was no evidence ofseepage discharging at the time of theinspection and it was possible to walkon foot everywhere.)

C-I

Photo No. Description

7 Looking up the downstream slope from apoint at the toe of slope showing a foot-path (motorcycle path?) that runs up the Sslope. Metal clipboard is lying on thepath.

8 Filled-in hole, which appears to havebeen an animal burrow, on the downstream

- face of the dike. •

* C

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* 0 0 S 0 0 0 0 0 0 0 0 0 0 0

APPENDIX D

HYDROLOG IC COMPUTAT IONS

- WATERSHED MAP

SSY o AT E... PRO- ... . SHEET NO.- ...-./ --

CHKOB s---DATE---------- /'2'{ JOB NO. ~

49as -4/ ,&,,'/ /92 3 it

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By ATE ROECTd ' x SHEET NO.----- OFJ..,.,o, .......A._TE_ _ - '- ...... . N. ' o .. ... o _ ._

CH o BY ...... DAE---..- - JOB N. _

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WHITMAN & HOWARD, INC."-"

Engin/eers and Archtec(ts

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Y 0 DA TE P47 PR 01ECT . 0' SHEET

CHICO. BY---- DATE ---- JOB O... . . . . .. 7. . . ... . . I z .?.:! ! -3-, _ J ,,..,.t

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Enginamr and Archiprc

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........DATE,..PROJECT. zHEET NO.--! OF...,

- CKO. BY DATE -

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WN~A & SADIC

4 WILIA S WE.LSLEY MASS.o -. /02" K ._.. .

• 4 ~.-~e 4 ~ WIA TFEET WL- ', -A,$ """

Engineers and Architects '.

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OAE PROJECT.' ------- - SHEET o.-_ .--

CHKO By-----DATE--------- JOB

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WHITMAN & HOWAtRD) INC. i-.. .

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45 WILI~iAM STREETI. WELLESLEY MASS. ,-

1Engine-s and Archite-sc'mI:-]1

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WHITMAN & HOWARD, INC.45 WILLAM STREET. WELLESLEY. MASS.

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APPENDIX E

INFORMATION AS CONTAINED IN

THE NATIONAL INVENTORY OF DAMS

I I

- S S

* S

* 0

* S

0 6 6 6 6 6 6 6 5 5 S 0 0 0 0 0 0 0

40 0

Ic-

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8-85

DTIC"l A. 4 .