HISTORICAL NEWS SEARCH - Government of British Columbia

HISTORICAL NEWS SEARCH - Government of British Columbia HISTORICAL NEWS SEARCH - Government of British Columbia

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Between June 18-September 16, designated areas of creeks in the McBride and area creeks involved were cleared of flood-deposited materials and gravel berms and riprap bank sections were re-established to provide similar to pre-flood protection for a total cost of 247,650. (B.G. Wilson. November 1986). -------------------------- *1) On June 11, 1990, a debris and rockslide blocked this 2-m culvert. (The Prince George Citizen, June 16, 1990). *2) On June 4, it was announced that Cabinet approved $1.5 million relief for McBride that was hit by mudslides (The Vancouver Sun, June 5, 1986). *3) The flood-related problems in Prince George are caused by water collecting in the lower Patricia Boulevard area between Fourth-Second avenues. There are two sewer line valves in the area. In anticipation of flooding, the City of Prince George seals the sewage manholes. Floodwaters will spread right over them and not mix with the sewage (The Prince George Citizen, June 1, 1990). June 14-16, 1986 Event type: Flooding. Precipitation: Nass Camp (41.0 mm/1 day), June 14, 1986; Quick (52.6 mm/1 day), June 14, 1986; Smithers A (70.0 mm/3 days), June 14-16, 1986; Houston (49.8 mm/1 day), June 15, 1986. Source: The Interior News, June 18, 1986; Houston Today, June 25, 1986; Environment Canada 1991; Sewa Tehera, pers. comm. April 1993. Field Engineer, Structures, B.C. Ministry of Forests, Smithers; H.H. Nesbitt-Porter. Ministry of Environment. Memorandum. June 25, 1986. June 1986 Flooding-Smithers area; Ministry of Environment. Memorandum. August 21, 1986. June 14/15 flooding in Smithers. File 55.4630. On June 14-15, heavy rain occurred in the Houston -Moricetown area. *1) In the five days between June 15- 19, Houston recorded 73.9 mm of rain. Heavy precipitation on the evening of June 14, continuing through to mid-day June 15, resulted in accelerated snowmelt. It caused flood flows in many local watercourses, including the Bulkley and Telkwa rivers. Floodwaters were reported to have risen more than 25 ft. (7.5 m) above normal level before receding. Further heavy rain on June 16 sustained these high flows. The “Father’s Day Storm” caused extensive damage. Highway 16 and the rail line between Moricetown- Telkwa sustained heavy damage. The Provincial Emergency Program evacuated eight people from five families at Moricetown. Smithers was without water service when the water intakes on the river clogged. In the Town of Smithers, the Beaver Islands Estates, on the east bank of the Bulkley River in section 31, Tp. 4, was inundated. As the houses in the area appeared to have been reasonably flood-proofed, the only reported damage consisted of flooded gardens and property access problems. Near Moricetown, a washout occurred when a culvert on the rail line plugged. A large culvert washed right out, sticking into the air. The CNR had replaced the Corya Creek trestle crossing of a left bank overflow channel with a small 1200-mm culvert and a 10-ft. (3 m) diameter multi-plate cattle underpass. The latter washed out and was deposited some distance downstream. Further downstream, a 10-ft. diameter highway underpass was undamaged although the road fill was overtopped. On June 15, about 50 volunteers helped sandbag the Bulkley River near Eddy Park on the west side of Telkwa. The riprapped riverbank near the Village of Telkwa water intake and the Village and Fire Hall suffered damage as a result of high water levels and high velocities of the Bulkley River. On June 15, the Bulkley River at Quick recorded a maximum daily discharge of 721 m 3 /s. On the same day, the Telkwa River below Tsai Creek recorded a maximum instantaneous discharge of 132 m 3 /s and a maximum daily discharge of 120 m 3 /s (Environment Canada 1991). The Telkwa River eroded riprap at the foot of Elm Street in Telkwa. Flood flow necessitated the emergency placement of some 200 loads of riprap to stabilize the right bank at the upstream end of the existing bank protection (”Bartlett area”). Further upstream, a recently constructed cut-off dyke probably prevented damage to area houses, and was itself undamaged. Damage to the highway and road system occurred along Driftwood Creek (Bulkley River tributary), Coalmine Road (Telkwa River) and Tenas and Goathorn Creek (tributaries to Telkwa River). The Goathorn Creek bridge on the Telkwa Coalmine Road was destroyed beyond repair. The bridge across Tenas Creek was also damaged. A Bailey bridge was put in downstream from the point where Tenas Creek flows into Goathorn Creek. On June 15, Foss bridge in the Driftwood Canyon washed away, leaving several families stranded. A Bailey bridge later replaced the bridge. One family in the Upper Driftwood was evacuated by helicopter on June 15. Very high floodwaters and logjams on Driftwood Creek caused considerable erosion adjacent to the Fred Seychuk residence. The creek channel moved to within 2 m of the building, posing a threat to the house in future high flows. Approximately 100 m of streambank was left unprotected and actively eroding. In the Driftwood area, additional damage included the destruction of unauthorised irrigation and domestic water systems on the Jim Shorter property; older front portion of a house on the Mike Rosger property was now very close to the creek bank; immediately upstream of the Lester property, and old, reportedly inadequate, timber bridge washed out and was deposited, along with other debris, on the Lester property. Floodwaters completely surrounded the 150

log home, which was undamaged but the yard and garden suffered severely. Downstream from Lister’s, damage to the Fred Coles property was limited to fencing and loss of land. A considerable quantity of wood debris blocked the Canyon Creek channel immediately upstream of the Babine Lake Road crossing. It resulted in gravel deposition, lateral relocation of the channel towards the left bank (Schwegler property) farm buildings and overbank flow, which threatened the farmhouse and downstream hayfield. Of major concern to the owner was the loss of burial of his industrial-domestic water intake-pump system adjacent to the farmyard. Downstream from the highway crossing of Canyon Creek a cut-off channel developed, which resulted the isolation or destruction of at least eight domestic water intake-pump systems. A further four or more might suffer water quality problems as the water table drops and groundwater being of poor quality in this area. Unusually severe localised damage, mostly to water supply intakes, left a number of properties and one dairy farm without proper water supplies. Based on a very cursory assessment, the estimated repair costs were: water supply system: $28,000; channel restoration: $1,000; riprap/erosion control: $17,000 and property cleanup $1,000 for a total of $47,500. (Nesbitt-Porter). Several bridge approaches on Forest Service roads (FSR) were washed out, causing at least $24,000 damage. On the Telkwa FSR, the Cumming and Jonas bridges sustained $1,500 damage each. On the Houston-Walcott FSR total damage to the Dockerill and Emerson bridges totaled $5,000. On the Blunt Creek FSR, damage to the Blunt Creek bridge was about $11,000. Two or three bridges on the McDonell FSR, were damaged for a total of $5,000 (S. Tehara, pers. comm.). At 19 km on the Morice River FSR, a large section of road collapsed, closing the road for several days. The “massive” slide was still active on June 25. According to B.C. Forest Service Morice District Manager Arnold Amonson, the whole hillside was moving. Crews were working to drain the hill of water and to rebuild the slumped road. --------------------------- *1) A record 55 mm of rain in 24 hours broke the June 24-hour record of 29 mm. This intensity, even without snowmelt, will produce fall-winter period floods. (Ministry of Environment). October 1-5, 1986 Event type: Debris slide. Precipitation: Prince Rupert M. Circ (182.8 mm/5 days), October 1-5, 1986; Kildala (32.6 mm/1 day), October 2, 1986; Prince Rupert (257.1 mm/4 days), October 2-5, 1986; Hartley Bay (172.8 mm/3 days), October 3-5, 1986; Falls River (63.4 mm/1 day), October 4, 1986; Nass Camp (69.6 mm/2 days), October 4-5, 1986; Stewart A (96.2 mm/2 days), October 4-5, 1986. Source: File M51-651-705180, Debris Flow Hwy. 37A (Airphoto BC 5425 No. 018). B.C. Ministry of Transportation and Highways, Terrace On October 5, a debris slide came down on Highway 37A between Meziadin-Stewart. The debris flow, consisting of cobbles, boulders, and saturated tills, was about 100 m wide. It started running in the evening and at 11:30 p.m. the road was officially closed. In the 24-36 hours before the slide, Stewart recorded approximately 125 mm of rain. October 26-28, 1986 Event type: Flooding. Precipitation: Kitimat Townsite (73.0 mm/2 days), October 26-27, 1986; Kitimat 2 (115.4 mm/3 days), October 26-28, 1986; Prince Rupert M. Circ (64.4 mm/3 days), October 26-28, 1986; Terrace A (37.6 mm/2 days), October 27-28, 1986. Source: Environment Canada 1991; Bruce Easton, pers. comm. April 19, 1994. CN Rail Prince George. The south abutment of the two-truss steel railroad bridge across the Wedeene River washed out. The bridge tipped in and settled under an angle, necessitating a 2-6 in. (5-15 cm) concrete wedge (Easton, pers. comm.). On October 28, the Little Wedeene River below Bowbyes Creek and the Kitimat River below Hirsch Creek recorded maximum instantaneous discharges of 170 and 712 m 3 /s, respectively. On the same day, these rivers recorded maximum daily discharges of 90.6 and 575 m 3 /s, respectively (Environment Canada 1991). July 26-August 3, 1987 Event type: Flooding. Precipitation: Chetwynd (197.6 mm/ month of July); (51.0 mm/12 hours), July 26, 1987; (30.0 mm), subsequent July precipitation; (63.6 mm/24 hours), August 1, 1987. Source: The Pioneer, August 4 and 11, 1987; Chetwynd Echo, August 4 and 11, 1987; The Vancouver Sun, September 14, 1987; Nesbitt-Porter 1987; File 55.5020 Chetwynd and South Taylor Flooding-1 st August. Between July 31-August 1, following weeks of unseasonably heavy and prolonged wet weather in northeastern British Columbia, intense rainfall resulted in extensive flood damage to watercourses and property. On July 26, Chetwynd recorded 51 mm of rain in a 12-hour period. It was followed by a light continuous rain, which added another 30 mm. Then on August 1, 63.6 mm fell in a 24-hour period on saturated soils and creeks with higher than normal levels. 151

Between June 18-September 16, designated areas <strong>of</strong> creeks in the McBride and area creeks involved were<br />

cleared <strong>of</strong> flood-deposited materials and gravel berms and riprap bank sections were re-established to provide similar<br />

to pre-flood protection for a total cost <strong>of</strong> 247,650. (B.G. Wilson. November 1986).<br />

--------------------------<br />

*1) On June 11, 1990, a debris and rockslide blocked this 2-m culvert. (The Prince George Citizen, June 16, 1990).<br />

*2) On June 4, it was announced that Cabinet approved $1.5 million relief for McBride that was hit by mudslides (The<br />

Vancouver Sun, June 5, 1986).<br />

*3) The flood-related problems in Prince George are caused by water collecting in the lower Patricia Boulevard area<br />

between Fourth-Second avenues. There are two sewer line valves in the area. In anticipation <strong>of</strong> flooding, the City <strong>of</strong><br />

Prince George seals the sewage manholes. Floodwaters will spread right over them and not mix with the sewage (The<br />

Prince George Citizen, June 1, 1990).<br />

June 14-16, 1986<br />

Event type: Flooding.<br />

Precipitation: Nass Camp (41.0 mm/1 day), June 14, 1986; Quick (52.6 mm/1 day), June 14, 1986; Smithers A (70.0<br />

mm/3 days), June 14-16, 1986; Houston (49.8 mm/1 day), June 15, 1986.<br />

Source: The Interior News, June 18, 1986; Houston Today, June 25, 1986; Environment Canada 1991; Sewa Tehera,<br />

pers. comm. April 1993. Field Engineer, Structures, B.C. Ministry <strong>of</strong> Forests, Smithers; H.H. Nesbitt-Porter. Ministry<br />

<strong>of</strong> Environment. Memorandum. June 25, 1986. June 1986 Flooding-Smithers area; Ministry <strong>of</strong> Environment.<br />

Memorandum. August 21, 1986. June 14/15 flooding in Smithers. File 55.4630.<br />

On June 14-15, heavy rain occurred in the Houston -Moricetown area. *1) In the five days between June 15-<br />

19, Houston recorded 73.9 mm <strong>of</strong> rain. Heavy precipitation on the evening <strong>of</strong> June 14, continuing through to mid-day<br />

June 15, resulted in accelerated snowmelt. It caused flood flows in many local watercourses, including the Bulkley and<br />

Telkwa rivers. Floodwaters were reported to have risen more than 25 ft. (7.5 m) above normal level before receding.<br />

Further heavy rain on June 16 sustained these high flows.<br />

The “Father’s Day Storm” caused extensive damage. Highway 16 and the rail line between Moricetown-<br />

Telkwa sustained heavy damage. The Provincial Emergency Program evacuated eight people from five families at<br />

Moricetown. Smithers was without water service when the water intakes on the river clogged. In the Town <strong>of</strong> Smithers,<br />

the Beaver Islands Estates, on the east bank <strong>of</strong> the Bulkley River in section 31, Tp. 4, was inundated. As the houses in<br />

the area appeared to have been reasonably flood-pro<strong>of</strong>ed, the only reported damage consisted <strong>of</strong> flooded gardens and<br />

property access problems.<br />

Near Moricetown, a washout occurred when a culvert on the rail line plugged. A large culvert washed right<br />

out, sticking into the air. The CNR had replaced the Corya Creek trestle crossing <strong>of</strong> a left bank overflow channel with a<br />

small 1200-mm culvert and a 10-ft. (3 m) diameter multi-plate cattle underpass. The latter washed out and was<br />

deposited some distance downstream. Further downstream, a 10-ft. diameter highway underpass was undamaged<br />

although the road fill was overtopped.<br />

On June 15, about 50 volunteers helped sandbag the Bulkley River near Eddy Park on the west side <strong>of</strong><br />

Telkwa. The riprapped riverbank near the Village <strong>of</strong> Telkwa water intake and the Village and Fire Hall suffered<br />

damage as a result <strong>of</strong> high water levels and high velocities <strong>of</strong> the Bulkley River.<br />

On June 15, the Bulkley River at Quick recorded a maximum daily discharge <strong>of</strong> 721 m 3 /s. On the same day,<br />

the Telkwa River below Tsai Creek recorded a maximum instantaneous discharge <strong>of</strong> 132 m 3 /s and a maximum daily<br />

discharge <strong>of</strong> 120 m 3 /s (Environment Canada 1991). The Telkwa River eroded riprap at the foot <strong>of</strong> Elm Street in<br />

Telkwa. Flood flow necessitated the emergency placement <strong>of</strong> some 200 loads <strong>of</strong> riprap to stabilize the right bank at<br />

the upstream end <strong>of</strong> the existing bank protection (”Bartlett area”). Further upstream, a recently constructed cut-<strong>of</strong>f<br />

dyke probably prevented damage to area houses, and was itself undamaged.<br />

Damage to the highway and road system occurred along Driftwood Creek (Bulkley River tributary),<br />

Coalmine Road (Telkwa River) and Tenas and Goathorn Creek (tributaries to Telkwa River). The Goathorn Creek<br />

bridge on the Telkwa Coalmine Road was destroyed beyond repair. The bridge across Tenas Creek was also damaged.<br />

A Bailey bridge was put in downstream from the point where Tenas Creek flows into Goathorn Creek.<br />

On June 15, Foss bridge in the Driftwood Canyon washed away, leaving several families stranded. A Bailey<br />

bridge later replaced the bridge. One family in the Upper Driftwood was evacuated by helicopter on June 15. Very<br />

high floodwaters and logjams on Driftwood Creek caused considerable erosion adjacent to the Fred Seychuk residence.<br />

The creek channel moved to within 2 m <strong>of</strong> the building, posing a threat to the house in future high flows.<br />

Approximately 100 m <strong>of</strong> streambank was left unprotected and actively eroding.<br />

In the Driftwood area, additional damage included the destruction <strong>of</strong> unauthorised irrigation and domestic<br />

water systems on the Jim Shorter property; older front portion <strong>of</strong> a house on the Mike Rosger property was now very<br />

close to the creek bank; immediately upstream <strong>of</strong> the Lester property, and old, reportedly inadequate, timber bridge<br />

washed out and was deposited, along with other debris, on the Lester property. Floodwaters completely surrounded the<br />

150

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