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Maintenance
<br />(a) 'I'hc repair, rehabilitation, or replacement of any pi- MOLISly authoriZe(l, Currcn(ly
<br />ScrviMIHC st'ucturC, or lilt, or Of any CLtrrCiltly SCrviCCablC Struc(urC or fill authorized by 33
<br />C R :330.:3, provided that the struclllrc or Iill is not to be put to uses dliflcrirlg 11'0111 those uses
<br />specified or contemplated for it in the original permit or the most recently aLlthori•rcdl
<br />modification. Minor deviations in the structure's Configuration or filled area, illClUdIlIg those due
<br />to changes in materials, construction techniques, requirc111c11tS of'other regulatory agencies, or
<br />CL1rrCllt COI1StrL1Cti011 codes of safety standards that are necessary to inake 1110 repair,
<br />1- chablhtatloll, Or replacement are authorized. Any Stream channel modification 1S hnlited to the
<br />minimum necessary for the repair, rehabilitation, or replacement Of 111C st'LICLIIi'c Or fill; sLiCll
<br />lllodlhcClfiolls, including the removal of naterial From the stream Channel, i11LISt bC 1111111edlately
<br />adjacent to the project or within the boundaries ol'thc struClurC or till. This NWI' also authorizes
<br />the repair, rehabilitation, or replacement of those slrLICturcS or fills dlcslroyedi or danlagedl by
<br />storms, floods, lirC or other discrete events, provided the repair, rehabilitation, or replacement is
<br />Conlnlcnccd, or is under contract to commence, Withi►1 two ycal-S Of the date. of'lhcir destruction
<br />or dalimgc. In cases oI catastroph1C events, such as h1 rrica11cs or tornadoes, fills two -year Illlllt
<br />111,13, he waived by the district engineer, provided the perinittec can demonstrate funding,
<br />contract, or other similar delays.
<br />(b) This NWI' also authoriZOS 1110 I'CInOVal of accumulated sediments and debris in the
<br />vicinity of,exisling Structures (e.g., bridges, CLllvertcd road crossings, Water inlal <C structurCS,
<br />etc.) and /or the placement ofnew or additional riprap to protect tl1C st-uctlu-C. The rcnloval of
<br />sediment is limited to the minimum necessary to restore the waterway in the vicinity of* (lie
<br />MR10111c to the approximate dimensions that existed when the StrL►CtLll'C was built, but Cannot
<br />extend farther than 200 feet in any direction from the strLICtlirC. This 200 foot limit does not
<br />apply to maintenance dredging to removc accumulated sediments blocking or restricting ouU1111
<br />and Illtfil <C Stl'L1CtLIrCS of to maintenance dredging to remove aCCLImulatcd sediments from Canals
<br />associated with outlall and intake structures. All dredged or excavated materials nuts( be
<br />deposited and retained in in area that has no waters of tiic United States LInICSS 001Cl'Wise
<br />Specifically approved by the district engineer under separate anthoi'iZafioll. The plaCCilieilt of
<br />new or additional rlpi -ap inust be the minimum necessary to protect the StrllCtllrC OI' to CIISLIre the
<br />safety ot'thc structure. Any bank stabilization measures not directly associated with the StruCturc
<br />will require a separate authorization From the district engineer.
<br />(c) This NWP alSO authorizes temporary strLICtUrCS, tills, and work necessary to conduct
<br />the mailltcri nice activity. Appropriate measures must be taken to maintain normal downstream
<br />flows and illlllimiz.e flooding to the maximum extent practicable, when tClllp0r8l'y St ICtUrCS,
<br />work, and discharges, including cofferdams, are necessary for construction activities, access fills,
<br />OI' dMatCring Of COI1StrLICtiO11 Sites. Temporary fills must Consist of materials, all([ be placed ill a
<br />maimer, that will not be eroded by expected high flows. Temporary fills must be removed in
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