County ap­proves $400K in re­pairs to Gif­ford, Gan­nons cause­ways

The Peterborough Examiner - - Front Page - JA­SON BAIN Ex­am­iner Staff Writer

Peter­bor­ough County is pro­ceed­ing with an es­ti­mated $400,000 in emer­gency re­pairs to re­pair ex­ten­sive dam­age to the James A. Gif­ford and Gan­nons Nar­rows cause­ways caused by a dev­as­tat­ing wind storm ear­lier this month.

Pre­vail­ing winds of more than 100 km/h dur­ing the May 4 storm cre­ated waves that re­port­edly over­topped the road­ways, caus­ing sig­nif­i­cant dam­age to the em­bank­ments of the spans – which re­main open to ve­hic­u­lar traf­fic.

County coun­cil­lors voted unan­i­mously Wed­nes­day, with­out de­bate, to use money from the pub­lic works en­gi­neered struc­tures re­serve to hire Drain Bros, BT En­gi­neer­ing and Cam­bium Inc. with­out putting out a re­quest for pro­pos­als.

Staff rec­om­mended sin­gle­sourc­ing the work so re­pairs to washouts can be ex­pe­dited to main­tain the in­tegrity of the road struc­tures, said en­gi­neer­ing and de­sign man­ager Peter Nielsen, who out­lined the dam­age in a re­port after en­gi­neers com­pleted as­sess­ments.

Coun. Terry Low said he saw the waves first hand that night rolling over the span be­tween En­nis­more and Bridgenorth and it was quite a sight.

Dam­age was re­stricted to the south side of the road be­tween the mid­dle cross cul­vert and the Che­mong Bridge. Dam­age to the Gan­nons Nar­rows Cause­way was re­stricted to the west side of the road be­tween the bridge and Chases cul­vert.

Re­pairs at both lo­ca­tions will in­clude ex­ca­va­tion of de­bris, bench­ing of the re­pair area, in­stal­la­tion of geo­tex­tile fabric and ar­mour stone rock and re-in­stal­la­tion of steel beam guiderails.

The ex­ist­ing guiderails will stay in place on the Gif­ford cause­way and pre-cast con­crete ( jer-

sey) bar­ri­ers will be in­stalled on the in­side face of the guiderail.

The pre-cast bar­ri­ers are to be in­stalled as part of the widen­ing project and they will be sal­vaged for that ef­fort, Nielsen wrote.

Staff will work with lo­cal ap­proval au­thor­i­ties to co­or­di­nate the ex­act tim­ing of the work as not to dis­turb fish spawn­ing habi­tat, of­fi­cials stated in a press re­lease. Ex­act time­lines will be re­leased as soon as they are avail­able.

The county has filed a claim with its in­sur­ance com­pany and is await­ing a re­sponse, but staff are doubt­ful the dam­age will be cov­ered, di­rec­tor of cor­po­rate projects and ser­vices Sheri­dan Gra­ham said.

Con­tract awarded, limit change for bridge

Coun­cil­lors also ap­proved award­ing a $47,940 con­tract to Jewell En­gi­neer­ing to re­ha­bil­i­tate the Gan­non’s Nar­rows Cause­way on Wed­nes­day.

The work will in­clude com­plet­ing an en­vi­ron­men­tal as­sess­ment, pre­par­ing de­sign draw­ings, spec­i­fi­ca­tions, ten­der forms and get­ting the needed ap­provals for the work.

The county did not so­licit other bids for the work.

Sin­gle-sourc­ing the con­tract will ex­pe­dite the process by four or five months, Nielsen told coun­cil­lors.

Load re­stric­tions im­posed on the Gan­nons Nar­rows Bridge late last year after an un­der­wa­ter in­spec­tion found its steel was de­te­ri­o­rat­ing slightly from cor­ro­sion caused by ze­bra mus­sels were also less­ened by county coun­cil.

Re­spec­tive L1, L2 and L3 re­stric­tions of 38, 30 and 20 tonnes were in­creased to 50, 42 and 25 tonnes after fur­ther, en­hanced in­spec­tion of the struc­ture ear­lier this year re­vealed that the dam­age isn’t as bad as ini­tially be­lieved.

The pre­lim­i­nary es­ti­mate to re­ha­bil­i­tate de­te­ri­o­rated parts of the bridge is $1 mil­lion, plus HST, Nielsen wrote in a re­port.

The work will in­clude re­mov­ing all ze­bra mus­sels and build­ing a pier around piles to pro­vide lat­eral sup­port, re­plac­ing dam­aged steel over­head braces, re­plac­ing or clean­ing, lu­bri­cat­ing and re­coat­ing truss bear­ings, re­paint­ing steel and re­pair­ing con­crete.

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