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Home My WebLink AboutBR-0076 Construction Phasing 11-11-21 NC 28 Bridge 1943Fontana Dam 1944Cheoah 1919 Bridge Rated Structurally DeficientFail Safe RetrofitFour Fracture Critical Pins No. 9 on NC 28 over Little Tennessee River0076 Replace Graham County Bridge -BR 0 WWTP•Condition of Culvert•Limit Impact to Natural Env.•Topography•DESIGN CHALLENGES feet 0 Water Flow•Rocky River Bottom•Maintenance of Traffic•WWTP•Site Topography•Delivery of materials•Site Remoteness•CONSTRUCTION CHALLENGES feet 0 ELEVATIONSIMPORTANT 1330’1289.9’1275’1276.8’feet 0 OWNERSPROPERTY TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA feet BargeThe river bottom is rock and piles can’t be driven. –setting a platform in place for a crane to work from.A temporary work bridge is constructed by driving piles and Temporary Work Bridge Construction Options Considered to Limit Impact can’t be driven.The river bottom is rock and spuds –Problem bottom to stabilize platform for crane workA barge utilizes spuds (piles) driven into river Rock Causeway Construction Options Available Phase: USFSTVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPUSFSTVA feet2001000Temp River/Lake Constriction: n/aPermanent Stream Impact: Temp Stream Impacts:Tree Clearing Area:6.4 acresTemp Construction Easements: CONSTRUCTION EASEMENTS NEEDED 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: n/aPermanent Stream Impact: Temp Stream Impacts:Tree Clearing Area:Temp Construction Easements: 6.4 acresSTAGING AREAPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: n/aPermanent Stream Impact: Temp Stream Impacts:3.68 acresTree Clearing Area: Temp Construction Easements: 6.4 acresTREES AND BRUSH–CLEARING Phase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: n/aPermanent Stream Impact: 0 linear feet–Little T 191 linear feetWelch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresTEMPORARY PIPES IN STREAMPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: n/aPermanent Stream Impact: 0 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresFILL OVER PIPESPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: n/aPermanent Stream Impact: 0 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresAPPROXIMATED HAUL ROAD LOCATIONSPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA 22% BlockedTemp River/Lake Constriction: Permanent Stream Impact: 151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresNE CAUSEWAYPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 22% blocked(new columns)2 35 ftPermanent Stream Impact: 151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresINTERIOR BENT & END BENTPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 22% blocked(new columns)2 Permanent Stream Impact: 35 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresNORTHERN SPAN OF NEW BRIDGEPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA 48% blockedTemp River/Lake Constriction: (new columns)2 70 ftPermanent Stream Impact: 151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresRETAINING WALL, END BENT, INTERIOR BENTSE CAUSEWAY, EXTEND TEMP PIPES, Phase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 48% blocked(new columns)2 70 ftPermanent Stream Impact: 151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresSOUTH SPAN OF NEW BRIDGEPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 84% blocked(new columns)2 70 ftPermanent Stream Impact: 151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresEXTEND SE CAUSEWAYPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 84% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresMIDDLE SPAN OF NEW BRIDGEPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA 74% blockedTemp River/Lake Constriction: (new columns)2 Permanent Stream Impact: 70 ft234 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresCOMPLETE NEW ROAD CAUSEWAYS FOR BRIDGE DEMOLITION, REMOVE UNNEEDED CAUSEWAY, EXTEND Phase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 74% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresREMOVE CENTER SPANPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 74% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresROADWAYS AND REVEGETATEREMOVE REMAINING SPANS, APPROACH Phase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA 0% blockedTemp River/Lake Constriction: (new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresREMOVE CAUSEWAYSPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 0% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresRESTORE TOPOGRAPHY AND REVEGETATEREMOVE HAUL ROADS, TEMP FILL & PIPE, Phase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 0% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresRELENQUISH TEMPORARY EASEMENTSPhase: feet 0 TVATVATVATVAStoney Mtn LLCCheoah Lake, Brookfield Graham Co. WWTPTVA Temp River/Lake Constriction: 0% blocked(new columns)2 Permanent Stream Impact: 70 ft151 linear feet–Little T 191 linear feet-Welch Creek Temp Stream Impacts:Tree Clearing Area: 3.68 acresTemp Construction Easements: 6.4 acresNEW PERMANENT RIGHT OF WAYPhase: feet Phase III Rock Causeway Blocks Water Flow up to 84%1275’–NWS1278’–Causeway 3’above NWS1284.5’–Normal Flow with Causeway 1289.9’–WWTP 1293’-10 Yr Storm •Discussion WRC Concerns•DWR Concerns•Army Corp Concerns•Brookfield•TVA•Processes for conveyance of easement•require?If culvert needed to be extended on TVA property, what would TVA •Are retaining walls on top of culvert acceptable? •TVA/County Ownership of Culvert?•4 of causeway scenarios. Can TVA and Brookfield Assist with water flow during Phases 3 and