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Cambridge Bay, NU. Freshwater Creek Riverbed Restoration (149225)
Proposal Status: Conformity Determination Issued
Project Overview
Type of application: Amendment
Proponent name: Jim MacEachern
Company: Hamlet of Cambridge Bay
Start Date: 2019-09-01
End Date: 2019-10-10
Operation Type: Seasonal
Project Description:
The Hamlet of Cambridge Bay, NU has retained Jivko Engineering Ltd to upgrade the existing Freshwater Creek crossing located on the road to the Cemetery some 2.5 km to the NW of town. The existing Crossing consists of 30 m long Bailey bridge installed directly on the ground. The east end of the bridge rests on 3.0 meter high river bank. The west end is supported on a gravel-rock fill Causeway projecting into the river and constricting nearly one third of the Natural River Channel. This causeway is subject to progressive yearly erosion, with need for major repairs every several years. The last major washout was in 2010 when the bridge was closed for traffic for few weeks. Due to budget restrictions, in the last 6 years the Hamlet has gradually replaced the existing bridge with a 45 m long structure installed alongside the existing one. The abutments of the new bridge are metal Bin-wall structures located beyond the High Water Mark of the Natural River Bed. At no point heavy equipment or bridge elements have been in contact with the watercourse during the installation of the new bridge. Presently, the Hamlet has secured funding for the last phase of the work including removal of the existing Bailey Bridge, excavation of the Causeway, excavation of the upstream buffer berm and restoring the riverbed to its original width and depth. The Work is considered Alteration of the Riverbed with potential for temporary siltation of the watercourse downstream from the crossing. The Plan is to carry out the work this fall, at low water, within a time window established by the NIRB, DFO and other appropriate Regulators.
Summary of Modifications:
▪ Excavated materials to be used for upgrading the road to the new bridge As per the Original Application, for the purpose of the Restoration of the River Bed, some 1,600 cubic meters material will be excavated from the Existing Causeway and the Buffer Berm. This material will be used for upgrading of the Existing Road in the area of the New Bridge Approaches. This work will be completed in parallel with the Excavation. Equipment used for this work is included in the Original Application. No additional equipment hours will be required. ▪ Completion of the new bridge by installation of timber deck and railings. Timber Deck and Galvanized Steel Rail will be installed on the New Bridge. Labor and equipment for this work are included in the Original Application The above described Modifications does not involve interference with the water in the river.
Persons: 6
Days: 10
Project Map
List of all project geometries:
ID Geometry Location Name
5820 point New project geometry
Planning Regions:
Affected Areas and Land Types
Settlement Area
Project Land Use and Authorizations
Project Land Use
All-Weather Road Access
Licensing Agencies
NIRB: Screening Decision Report
NWB: 0
NIRB: Screening Decision Report
Other Licensing Requirements
No data found.
Material Use
Type Quantity Size Use
Large Excavator 1 5m x 5m To be used for excavation of imported material from the riverbed.Equipment will be deployed on shore. Only bucket will be in contact with water
Large wheeled Loader 1 5m x 5 m Used for removal of the excavated material and place it on the adjacent road approach
Fuel Use
Type Container(s) Capacity UOM Use
Diesel 0 0 Cubic ft For refueling once daily Excavator & Loader; using fuel truck coming from town. No fuel or lubricant stored on site. Refueling will be min 100m from water, beyond 2 meter high road embankment
Hazardous Material and Chemical Use
Type Container(s) Capacity UOM Use
No Hazardous materials or chemicals 0 0 Cubic ft No Hazardous materials or chemicals to be used or stored on site
Water Consumption
Daily Amount (m3) Retrieval Method Retrieval Location
0 0 0
Waste and Impacts
Environmental Impacts
The Work involves excavation and removal from the riverbed of protective berm and partial causeway obstructing nearly one third of the natural channel. The berm and causeway have been constructed years back with the construction of the existing bridge crossing. Some 2, 500 cu m mixture of sand, gravel and rock would be removed from the riverbed. Estimated 20% of this material is located under the Low Water Level. Excavated material would be used for the widening of the adjacent road embankment. The Work would be completed within no more than 3 working days @ 8 hours, or a total of 24 hours. During excavation, temporary siltation of the downstream section of the river will occur. The Work is to be carried out in the fall, at Low Water Level, within a timeframe window specified by the DFO and other Regulators. The area subject to excavation is marked Green on the enclosed drawing. Given the proximity to town no food, or human waste will be left on site.
Waste Management
Waste Type Quantity Generated Treatement Method Disposal Method
No data found.
Category: Imported geometry - proect geometry
Recieved: 2019-06-11
Originator: Jivko Jivkov
Public Registry ID: 16855
Document Size: 681.8 Kb
Category: Application related document - Conformity Determination Letter
Recieved: 2019-06-14
Originator: Peter Scholz
Public Registry ID: 16856
Document Size: 223.06 Kb
Category: Application related document - Conformity Determination Letter
Recieved: 2019-09-12
Originator: Peter Scholz
Public Registry ID: 16862
Document Size: 430.49 Kb