Flood Protection
Fraser River water levels in Mission
Provincial Information
River Stations Current Fraser River water levels are available here
Below is the District of Mission’s detailed response actions when gauge readings reach specified levels
Guage Reading Below 5.5 meters
| General Conditions: |
- River is below the top of its natural banks.
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| District Response: |
- Perform routine dike assessments and inspections, dike maintenance and flood preparedness activities in March and April, continue to monitor river levels.
- Review and update District’s FPRP, including the communication plan.
- Begin implementing the communication plan if warranted by flood threat.
- Liaise with businesses adjacent to dikes
- The District’s Flood Preparedness Task Force meets regularly to review preparedness implementation.
- Task force representatives updates Emergency Planning Committee at a regularly scheduled EPC meeting.
- Attend any flood response training workshops offered by the province.
- Submit infrastructure improvement proposals and funding requests to province if solicited.
- Liaise with Ministry of Environment, Fraser Valley Regional District, Fisheries and Oceans Canada, Fraser River Harbour Authority, BC Hydro, Canadian Pacific Railway, Terasen, Ministry of Agriculture.
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Gauge Reading: 5.5 meters
| General Conditions: |
- The river has risen to the top of its natural banks.
- Some very low areas such as Hatzic Estates and Silvermere Lake, may have standing water depending on pump station effectiveness and rainfall / streamflow amounts. Some roads outside of the dikes may be impassible.
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| District Response: |
- Regular dike patrols are commenced.
- The District’s Flood Preparedness Task Force meets weekly to review preparedness implementation.
- Sand, sandbags etc. may be made available to low lying residential areas depending on available resources.
- Volunteers and District staff are being trained on sandbagging techniques, dike inspection protocols, FPRP.
- District administration staff are informed of basic flood information to respond to telephone enquiries.
- District staff are presenting information sessions for staff, business owners and residents if the river level is likely to reach 6.0 meters.
- Flood Preparedness Task Force is identifying staff to ensure 24 hour dike inspections can be completed.
- Excavator, rock truck and riprip suppliers are confirmed.
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Gauge Reading: 6.0 meters
| General Conditions: |
- The river has risen above it natural banks and is spilling over and flooding unprotected floodplain areas.
- Seepage through the dikes, high groundwater tables and rainfall / streamflow will result in ponding on the land protected by the dikes depending on the effectiveness of the pump stations.
- At 6.5 meters, some properties at Silvermere Lake could have water in the yards but no houses will be flooded. Water is at the base of the operating areas of businesses on outside of dikes at foot of Nelson and Duncan Streets.
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| District Response: |
- The District’s Emergency Preparedness Planning Committee decides whether to open the District’s Emergency Operations Centre.
- Emergency Social Services and Fraser Health Authority are engaged regarding possible evacuations.
- Daily dyke patrols are commenced.
- Some isolated low lying areas not protected by dikes may need sandbagging or evacuation.
- Flood response supplies, such as sandbags, and Mission Search and Rescue equipment are moved from permanent housing on floodplain to temporary housing at Public Works yard.
- Temporary sewage pump is installed on North Railway Ave. east of Junction Mall.
- Low section of dike at foot of Horne St. (Meeker Mill) is replaced with temporary loc-block dike.
- The District will be coordinating the response of volunteer organizations.
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Gauge Reading: Above 7.0 meters
| General Conditions: |
- The river is within 1.5-2.5 meters of crest of the dike.
- The river has generally widened into the unprotected floodplain adjacent to the dikes and extensive flooding of unprotected areas is occurring.
- Significant ponding may be occurring on the land side of the dikes.
- Some sewers may begin to back up.
- At 7.5 meters, several houses at Silvermere Lake will begin to see water at floor level. Water may isolate trailers at Ruskin Trailer Park and Triple Creek Estates trailer park.
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| District Response: |
- The District commences 24 hour dike patrols on a continuous basis.
- Flood response commences including river bank erosion, seepage and boil monitoring and repair as necessary.
- Gaps in the diking system, such as railway crossings are closed with fill material.
- Dikes are closed to public access for safety reasons.
- Portable pumps are used to deal with sewer backups, support permanent pump stations and deal with backed up stormwater.
- Evacuation of populated areas may ordered by the Director of the Emergency Operations Center.
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