HomeMy WebLinkAboutOffshore & Coastal Tech GREGORY F. YAKABOSKI
TOWN ATTORNEY
greg.yakaboski~town.soathold.ny.us
PATRICIA A. FINNEGAN
ASSISTANT TOWI'r ATTORNEY
patricla, ff~negan@town.southold.ny.us
LORI ~IULSE i~ONTEFUSCO
lorl.mo~efnsc6 ~own. son%hold.ny.us
OFFICE OF THE TOWN ATTORNEY
TOWN OF SOUTHOLD
JOSHUA Y, HORTON
Supervisor
Town tttl, 53095 Route 25
P.O. Box 1179
Southold, NewYork 1197t-0959
Telephone (631) 765-1939
Facsimile (631) 765-1823
October 31, 2003
William G. Grosskopf, Vice President
Offshore & Coastal Technologies, Inc.
540 Webb Road
P.O. Box 1368
Chadds Ford, PA 19317
Agreement
Offshore & Coastal Technolo.qies, Inc. and Town of Southold
Dear Mr. Grosskopt:
Please find enclosed a fully executed copy of the Agreement between the
Town of Southold and Offshore & Coastal Technologies, Inc. dated October 20,
2003, for assessing the hydrodynamic and se~limentation 'impacts for Goldsmith
Inlet and adjacent shorelines.
7.~¢At[u ly yours,
Patdcia A. Finffe§an,t~sq.
Assistant Town Attorney
CC;
Elizabeth A. Neville, Town Clerk w/original signed contract
Jim McMahon/Jamie Richter w/contract copy
AGREEMENT
THIS AGREEMENT ma'd~ this 20th day of October 2003 between the Town of
Southold, a municipal corporation of the State of New York, having its office and principal
place of business at 53095 Main Road, Southold, New York 11971 hereinafter called the
"Town" and Offshore & Coastal Technologies, Inc., 540 Webb Road, P.O. Box 1368,
Chadds Ford, PA ~9317, herein after called the "Contractor".
WHEREAS, the Town of Southold did heretofore request and receive a bid proposal from
the Contractor to assess the Hydrodynamic and Sedimentation Impacts for Goldsmith Inlet
and adjacent shorelines, as part of the Southold Town Erosion Mitigation Project, in
accordance with the tasks~, attached hereto, in the amount of Ninety Thousand Dollars
($90,000) and
WHEREAS, the Town of Southold accepted the proposal of the Contractor on the 23rd
day of September 2003.
NOW, THEI~EFORE, IT IS AGREED AS FOLLOWS:
1. The Contractor does hereby agree to perform all the tasks outlined in the
"Proposal to Assess Hydrodynamic and Sedimentation Impacts - Goldsmith Inlet, Bay
and Adjacent Shorelines''~, dated October 2003 and annexed hereto and made part of
this contract.
o
The Town does hereby agree to pay the Contractor for the work, the total sum of
Ninety Thousand dollars ($90,000). The total sum is to be paid to the Contractor
within forty-five (45) days of the completion of the said work and the acceptance
thereof by the Town.
3. The Contractor shall secure and maintain such insurance tha~ will protect him/her
from claims under the Worker's Compensation Acts and from claims for bodily
injury, death or property damage that may arise from the performance of his/her
services under this Agreement, in limits of $1,000,000. and $2,000,000. aggregate
liability for bodily injury and property damage. The Contractor shall indemnify
and hold harmless the Town from and against all suits, claims, demands or actions
for any injury sustained or alleged to be sustained by any party or parties in
connection with the alleged negligent performance or negligent performance by the
Contractor, his employees or agents or any subcontractor and in case of any such
action brought against the Town, the Contractor shall immediately take charge of and
defend the same at his own cost and expense. In addition, the Contractor will name
the Town as an additional insured on any applicable policies.
iN WITNESs WHEREOF, the parties hereto have set their hands and seals the day and
year first above written.
Town of Southold
~Y Jla Y; HortV~n, Supervisor
Offshore & Coastal Technologies, Inc.
¸By
Proposal to Assess Hydrodynamic and Sedimentation Impacts
Goldsmith Inlet. Bay, and Adjacent Shorelines
Offshore & Coastal Teehnolo~es, Incorporated
10/8/2003
Bdckground
Offshore & Coastal Technologies, Inc. has performed various smweys and studies of the Southold coastal
area ~uring the past several years, Included in that work was an upgraded sediment budget of the area
~rom Mattituck Inlet to Duck Pond Point. ~vhich includes Goldsmith Inlet. Field data collection has
lngluded beach profiles and hydrodynamic data. This proposal addresses a metkod to evaluate the effect
Jtf shortening the jetty at Goldsmith Inlet by as much as 50%. The consequences ofjetty shortening will
be evaluated for the adjacent beaches, h~tet and the longshore hydrologic and sedimerrt transport system.
The proposed approach include~ shoreline response modeling for the updrifc and doWndrift beaches and
ba~ymetr~c response modeling for the inlet area, driven by tides and wave-driven radiation stress ~es. The
~toxly d0maSn in,eludes the shoreline reach from about one nautical mile west of Goldsmith Inlet t6 ~
easrsid~of Kermy*s Beach.
Proposed Tasks:
1. Development of improved wave climatology (daily conditions rather than storms).
A numer~caI wave model will be employed using upgraded wind field input to develop long [erm
wave characteristics that, in turn, will serve as input to the shoreline change and inlet
l~ydrodynarmc models. It is envisioned that 10 years of continuous daily wave conditions will
prov/de sufficient variability to assess annual and potential changes in shoreline and inlet
conditions. Cost: $12,000.
2. Obtain updated aerial photography and digitization of shoreline position.
Field observations indicate that the inlet mouth and adjacent shoreline configuration has evolved
since the Town last collected monitoring survey data. For purposes of numerical modeling, an
updated set of aerial photography will indicate potential significant changes in shoreline position
that can then be exanfmed numerically. Cost: $5,000 for management and analysis. (The
Federal government has offered to pay for the photography up To a cost of $2,400.)
3. Validation of shoreline change model 1999-2003.
A shoreline change model will be applied to the shorelines updrift and downdrift of Goldsmith
Inlet and an updated validation will be performed using the 1999 and 2003 shorelines. Cost:
$8,000.
4. An assessment of shoreline effects due to jetty shortening.
Suffolk County ~s expected to carry out dredging of Goldsmith Inlet, thcluc~mg bypassing
approx/mately 15,000 cubic yards of sand from the updrift (west) side of the jetty, during the
fall/wiuter of 2003-04. The existing jetty configuratinn, preSent~day shoreline and post-dredgthg
inlet anr~ditions as speeffiedin plans prepared by Suffolk Cmmty will' be used as an initial
condihcm m a shoreline change model. The shoreline change model w/Il. simula~ the evolution
of the dredged sand placement over a I0-year period and will indicam.the Iongshere extent over
vctrich the filI migrates. The effects will be eXam'med along the area from Goldsirfith Inlet to
Kenn~'s Beach.
The shoJ:eline change model of the placement crf dredged material described above w/il also be
appl/.ed to three cases o£jetty-shortening (fi.om 0%, 33% and 50% o£the exis~g structure length)
ro eval~tate:potential do~mdrift impacts, The modeling con,d,~'on will assume the jercy is securely
rev0rrstmcted aad does not allow passage of sand through the~ .StmClure. The updrift;byp~si~g
r~e ti~o the shorelSne eJmnge model wiI1 be derive~ from the sedhnent model output (Task 5,
below).
AS each simulation is performed the results will be provided to the Town for review and
commem. We expect some changes to the antimpated modeling plan, so this task is priced based
on a maximum of 10 model applications (dredged and no dredging for existing jetty and fotrr
shortened jetty cases). Additional model application cost wlli be pro-rated based on the lump
suni eos~.
Cost (maximum 10 model applications'}: $20,000.
An assessment of hydrodynamic and sedimentation impacts of dredging the inlet and the
reconstructing of Goldsmith Inlet jetty (three increments of jetty shortening: 0%, 33% and 50%)
on inland water bodies and adjacent beaches.
Hydrodynamic and sedi2nentation impacts resulting as a consequence of reconstructing the
Goldsmith Inlet jetty will be assessed using a combination of the nearshore wave model
(STWAVE) used in prior tasks and a two-dimensional circulation model (M2D) capable of
computing efficiently on a very fine resolution. It is envisioned that modeling will need to be
established on a scale as fine as 25-foot resolution. The grid domain will cover the entire mouth
of the Lnlet, seaward about 0.5 nm/, the inlet itself, the adjacent shorelines at least 1.0 nmi to the
east and west, and the entire back bay system. The hydrodynamic model will calculate the tidal
flow flwough the inlet entrance and is needed to assess the degree o£ susceptibility to closure of
the inlet by sed/mentafion as caused by modification of the jerry.
The sedimentation model will provide time-varying changes in bathymerry that could be expected
as a consequence of jetty shorterfmg. The evolution of tidal shoal features and possible charmel
/nfilling (or scour) will be assessed. This model also provides the boundary condition for the
shoreline change model (sediment entering the area east of Goldsmith Inlet: see Task 4). Cost:
$25,000.
6. Measurements for Validation
Bathymetry and shoreline position are needed throughout the domain described above.
Bathymetric data now exist for each inlet, bay system and adjacent beach profiles based on work
2
funded last fall by CHL (Dr. Nicholas Kraus). It is recommended that a high-accuracy shoreline
survey be obtained at the time that aerial photography is collected. Cost: $5,000.
Hydrodynamic measurements were also collected by CHL including tides at the entrance to
Mattituck Inlet (on Long Island Sound), ~vater levels in the bay Systems of both Mattituck Inlet
and Goldsmith InJ_et, and curre~t dam for one day ushag fixed gauges. It is recommended that a
roving ADCP be deployed for a tidal cycle from a small boa*to capture overall flow pattern over
a tidal cycle in the vicinity of Goldsm/th Inlet. The following field data are recommended:
1. Water level gauge outside and inside Goldsmith (during time of ADCP data collection).
Cost: $5,000 (could be eliminated if item 3, below, is funded).
2. ADCP surve~ (13 hours) in offshore area and inside inlet at Goldsmi¢ Inlet. This survey
would illu,str~e the currents: adjacent to the inlet (/n Lortg I~la~d SoUnd)~ especially i~ the
v~ci~z oCthe, jetty, Tt~es~ measurements could ovent~al~y Be compared to thOse oC, qurring
when tlse j~ ig shoff6n'ed, thus providing further val/:daffon for the nuI~erical model. Cost:
$toA~00.
3. rtiree O) Fixed current meters collecting current profiles at the enumace, mid channel and
baekbay entrance for a period of three (3) days. Cost: $8,000.
7. Report and Presentation of Results
Areport will be developed summarizing the data collection, analys~s, model development and
model applications. Cost: $5,000.
, 0CT~, 20. 2003 2:tgPM
SOUTHOL~ SUPERVISORS
OFFICE OF 'l'~: TOtFN CI,EILK
TOWN OF SOUTHOLD
NO. 416 P. 1
Town Hstl~ 53095 l~ai~ ~oad
Sou~oI~ H~ Y~k 11971
F~ (~D 7~61~
T~hone (6~1)
BOARD,
RF~,SOLVED thal.~¢ Tov~n Boad o£thc Town of Southold h~reby authorizes and direct!.
~...~pervisor, J~shUa. Y. Hor~o~ lo execute a~ad ~i~n ax~ A~reement wifth Offshore & Coastal
Project at a ~'est not Zo ~xcecd$, 90,1)00 arid subj~t to thc Approval of the Town
El/zabeth ~ Neville
Southold Town Clerk