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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On November 27 at 11 p.m., the river rose quickly, flooding River Road and closing it from the Cameron Street Bridge to Foley Crescent. According to an employee of Papason Trucking Ltd., it “came suddenly like a wave around 11 p.m.” The ice jam just above the Foothills Bridge broke allowing the water to drain to the next ice jam at the confluence of the Nechako and Fraser rivers. The water backing up behind this ice jam, which caused the flooding in the Cameron Street Bridge area, slowly drained. The dam break above Foothills Bridge also lowered the water level at Morning Place where homes near the river’s edge had been flooded. While it caused flooding problems closer to downtown, it removed the threat of further flooding at the upscale neighbourhood on the west side of the North Nechako Road. Though the riverbanks reappeared, massive blocks of ice, some as thick as 10 ft. (3 m) continued to hug the riverbanks. On the morning of November 28, the icejam extended more than 5 km, from about 1 km west of the Foothills Bridge to the Spruce City Wildlife Association hatchery on River Road. The rising water was up to the backs of the houses on Prince George Pulp Mill Road. River road was closed after flooding from just east of the Cameron Street Bridge to Foley Crescent. Parking lots and storage on both sides of the road were flooded and Cottonwood Island was half under water. The flooding caused Pacific Western Brewery to shut down regular production the first time in 27 years. When the brewery’s loading area flooded, BC Rail sent in tractors to pull out all trailer units threatened by the floodwaters. Nearby Cedars Christian School was closed for the day. Water had covered driveways and was lapping against units of the Del Haven condominium project closest to the riverbank. West of Wilson Park was under water, and its industrial fuel tanks were floating downstream among the blocks of ice. The massive icejam on the Nechako River moved downstream from outlying western Prince George neighbourhoods, causing significant flooding of low-lying residential and industrial areas. Floodwaters more than 1 m deep forced the closure of the underpass on North Nechako Road and most off-ramps from the Hart Highway were closed. By 7:30 a.m., morning commuters heading into town were backed up to the Mohawk service station. On November 28 at 3 a.m., the river had crested and by 2 p.m. that day, the water had receded by a foot (30 cm). By November 30, the only remaining road closure was the North Nechako Road under the John Hart underpass, which was expected to reopen around December 1. On December 5, Environment Minister Paul Ramsay announced that his ministry would review the circumstances that led to the flooding. ---------------------------- *1) According to a local old-timer, it was the first time he had seen this type of winter flooding since 1953 (Prince George Citizen, November 29, 1996). Though there had not been any for some years, the Nechako River has a long history of damaging ice jams. This ice jam was not the highest on record but it appeared to be one of the largest in recent years. *2) It takes about 10 days to two weeks for a reduced flow from the reservoir to be registered at Vanderhoof and Prince George (Prince George Citizen, November 26, 1996). Between the Skins Lake Spillway-Prince George, three significant rivers (the Nautley, Stuart and Chilako) provide inflow into the Nechako River. Following one of the longest winters in recent years, Prince George had the fourth wettest summer on record. Despite earlier increased releases, runoff into the Nechako Reservoir in June and July was still 15-17% over the long-term average. In August, the reservoir was 25% too high in view of runoffs anticipated during the next spring (Prince George Citizen, November 28, 1996). January 27-29, 1997 Event type: Ice jam flooding. Precipitation: Not applicable. Source: Peace River Block Daily News, January 30, 1997; Ministry of Environment, Lands and Parks files; Flood Report Summary, January 31, 1997. Late on January 27, ice build up in the Peace River about 5 km downstream from Taylor caused the level of the Peace River to rise behind it. To alleviate the potential flooding of properties along the river in South Taylor, BC Hydro cut back the outflow from the W.A.C. Bennett Dam about 5,000 cfs (141.6 m 3 /s). BC Hydro spokesman Dennis Hunter noted, “I don’t think it will get any worse than it did last year.” As of the morning of January 29, there were no reports of shoreline homes in danger of flooding. In response to warm weather patterns the ice jam south of Taylor and potential flooding receded. The ice front slowly made its way down the Peace River. By January 30, it was situated at the Taylor Bridge. The ice jam later receded 2.5 km downstream of Highway 97 bridge. The water level at South Taylor dropped 1.5 m. Early March 1997 Event type: Debris slides. Precipitation: Not available. Source: Quesnel Cariboo Observer, March 16, 1997. 182

Early March, a logjam and a series of slides in Baker Creek threatened Quesnel with possible flooding. *1) No problems were anticipated if snowmelt would start around April 15. But in case of a cool spring with snow not starting to melt until April 25 th , flood problems might be anticipated. *2) In the meantime, city council mandated that no building permits be issued within 100 m of Baker Creek unless a geotechnical study had been conducted. ------------------------ *1) Baker Creek usually crests sometime around June 21-22 (Quesnel Cariboo Observer, March 16, 1997). *2) Quesnel almost lost a bridge a “couple of years” previous when a lot of debris came down Baker Creek (Quesnel Cariboo Observer, March 16, 1997). March 29-April 16, 1997 Event type: Debris slides. Precipitation: Not applicable. Source: Quesnel Cariboo Observer, April 2, 6, 9, 13 and 16, 1997; The Daily Courier, April 16, 1997; Ministry of Environment, Lands and Parks files; Memos April 8, 1997. Herb Langin to Jon O’Riordan and April 9, 1997. Neil Hamilton to Peter Woods. Re: Slides in Cariboo Region. During late March-early April, several landslides were reported in the Fraser and Quesnel Rivers, causing considerable mass wasting in the area. On the morning of March 29, on West Fraser Road a mobile home was evacuated. Influenced by weather and runoff, the ground around the home started to shift pushing the trailer to the edge of an embankment overlooking the Fraser River. The trailer was tied up for the night. On March 31, the trailer was moved closer towards West Fraser Road on the same property. A second trailer at the same location had a fault line running under its foundation and though threatened, was not yet affected by the ground shift. *1) In early April, Quesnel city council passed a variance permit to allow the endangered McKone residence on Twan Street to be moved away to safety from a crumbling Baker Creek cliff. The home was later moved further onto their lot. Around April 5-6, about 100 ft. (30 m) of the south side of Durrell Road about 1 mi. (1.6 km) up from Highway 97 gave way. Spring conditions caused the road to slide down the embankment, reducing the road to one lane. Residents were forced to make a 5-mi (8 km) detour via Dale Lake Road. Les Townsend of Argo Road Maintenance called the site a historic area of instability. At the time, Argo was monitoring 10 active slide locations. “Quesnel is probably the landslide capital of North America,” Townsend observed. *2) “A wet summer last year and a quick spring runoff this year, it’s the worst I’ve seen it in five years.” At the slide site, the roadway material was constantly moving and the pavement continued to crack in either direction. According to Geotech engineer Nick Polysou, the slope the trailer was located on had been moving over a period of many years. He added that the slope, left by the Fraser River when it cut down through the ground, would continue to move back. Polysou also found evidence of an older slide area above the road. This was either an older slide or a small slump of slope below the trailer, which happened shortly after the road was cut. Around April 7-8, a helicopter pilot and Ministry of Forests staff flying the area noted four slides occurred on the Fraser River. A large slide at Moose Heights, just upstream of Quesnel 7-km north-northwest from the Quesnel airport, did block the Fraser River for a short time. At 2:30 p.m. on April 8?, the slide was still very active. According to the pilot’s report, it was blocking about a third of the channel then. Water ponded 1-2 m before breaching. The water was below the high water mark at all times. The Quesnel River slide, just above Big Canyon about 10 km upstream from Cariboo Pulp and Paper in Quesnel, completely blocked the river for some time, possibly more than once. The river ponded for a couple of metres of elevation before breaching. The slide was breached at 2:00 p.m. on April 8 when last seen by the pilot. The breech was small and lots of slide activity was still occurring. At its maximum, the blockage ponded water 2-3 m. Even on April 9 after breaching, this ponding was still 1-2 m deep. On April 9 at the time of inspection, both sites were still active. Small slides and falling trees were observed. The slides posed no hazard to the nearest public infrastructures, like bridges at Quesnel. The slide on the Quesnel River had a major impact on the river water and would continue to do so for some time. There was neither downstream threat nor immediate concern of water quality. The City of Quesnel gets its domestic water from deep wells and it was too early in the year for private irrigation systems to be operating. The pulp mills in Quesnel handle theirs with filter systems. Around April 11, 11 more landslides were noted in the Quesnel area during the previous 48 hours. Though they were most active and continued to move, none impacted watercourses in the area. The other slides did not block the Fraser River but were dumping “plenty of soil,” causing the river to run very dirty downstream. As not too many trees were involved no logjams were formed. The slides disrupted or closed roads and affected some homes. On April 11, all roads except a small side road south of Quesnel were open. On April 16 at 4:45 p.m., shifting soil snapped a gas line and caused an explosion in West Quesnel that killed five people and injured 20 others. Shock waves were felt throughout the city. The explosion leveled and destroyed two 183

On November 27 at 11 p.m., the river rose quickly, flooding River Road and closing it from the Cameron<br />

Street Bridge to Foley Crescent. According to an employee <strong>of</strong> Papason Trucking Ltd., it “came suddenly like a wave<br />

around 11 p.m.” The ice jam just above the Foothills Bridge broke allowing the water to drain to the next ice jam at the<br />

confluence <strong>of</strong> the Nechako and Fraser rivers. The water backing up behind this ice jam, which caused the flooding in<br />

the Cameron Street Bridge area, slowly drained. The dam break above Foothills Bridge also lowered the water level at<br />

Morning Place where homes near the river’s edge had been flooded. While it caused flooding problems closer to<br />

downtown, it removed the threat <strong>of</strong> further flooding at the upscale neighbourhood on the west side <strong>of</strong> the North<br />

Nechako Road. Though the riverbanks reappeared, massive blocks <strong>of</strong> ice, some as thick as 10 ft. (3 m) continued to<br />

hug the riverbanks.<br />

On the morning <strong>of</strong> November 28, the icejam extended more than 5 km, from about 1 km west <strong>of</strong> the Foothills<br />

Bridge to the Spruce City Wildlife Association hatchery on River Road. The rising water was up to the backs <strong>of</strong> the<br />

houses on Prince George Pulp Mill Road. River road was closed after flooding from just east <strong>of</strong> the Cameron Street<br />

Bridge to Foley Crescent. Parking lots and storage on both sides <strong>of</strong> the road were flooded and Cottonwood Island was<br />

half under water. The flooding caused Pacific Western Brewery to shut down regular production the first time in 27<br />

years. When the brewery’s loading area flooded, BC Rail sent in tractors to pull out all trailer units threatened by the<br />

floodwaters. Nearby Cedars Christian School was closed for the day. Water had covered driveways and was lapping<br />

against units <strong>of</strong> the Del Haven condominium project closest to the riverbank. West <strong>of</strong> Wilson Park was under water,<br />

and its industrial fuel tanks were floating downstream among the blocks <strong>of</strong> ice.<br />

The massive icejam on the Nechako River moved downstream from outlying western Prince George<br />

neighbourhoods, causing significant flooding <strong>of</strong> low-lying residential and industrial areas. Floodwaters more than 1 m<br />

deep forced the closure <strong>of</strong> the underpass on North Nechako Road and most <strong>of</strong>f-ramps from the Hart Highway were<br />

closed. By 7:30 a.m., morning commuters heading into town were backed up to the Mohawk service station. On<br />

November 28 at 3 a.m., the river had crested and by 2 p.m. that day, the water had receded by a foot (30 cm).<br />

By November 30, the only remaining road closure was the North Nechako Road under the John Hart<br />

underpass, which was expected to reopen around December 1.<br />

On December 5, Environment Minister Paul Ramsay announced that his ministry would review the<br />

circumstances that led to the flooding.<br />

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

*1) According to a local old-timer, it was the first time he had seen this type <strong>of</strong> winter flooding since 1953 (Prince<br />

George Citizen, November 29, 1996). Though there had not been any for some years, the Nechako River has a long<br />

history <strong>of</strong> damaging ice jams. This ice jam was not the highest on record but it appeared to be one <strong>of</strong> the largest in<br />

recent years.<br />

*2) It takes about 10 days to two weeks for a reduced flow from the reservoir to be registered at Vanderho<strong>of</strong> and Prince<br />

George (Prince George Citizen, November 26, 1996). Between the Skins Lake Spillway-Prince George, three<br />

significant rivers (the Nautley, Stuart and Chilako) provide inflow into the Nechako River. Following one <strong>of</strong> the<br />

longest winters in recent years, Prince George had the fourth wettest summer on record. Despite earlier increased<br />

releases, run<strong>of</strong>f into the Nechako Reservoir in June and July was still 15-17% over the long-term average. In August,<br />

the reservoir was 25% too high in view <strong>of</strong> run<strong>of</strong>fs anticipated during the next spring (Prince George Citizen,<br />

November 28, 1996).<br />

January 27-29, 1997<br />

Event type: Ice jam flooding.<br />

Precipitation: Not applicable.<br />

Source: Peace River Block Daily News, January 30, 1997; Ministry <strong>of</strong> Environment, Lands and Parks files; Flood<br />

Report Summary, January 31, 1997.<br />

Late on January 27, ice build up in the Peace River about 5 km downstream from Taylor caused the level <strong>of</strong><br />

the Peace River to rise behind it. To alleviate the potential flooding <strong>of</strong> properties along the river in South Taylor, BC<br />

Hydro cut back the outflow from the W.A.C. Bennett Dam about 5,000 cfs (141.6 m 3 /s). BC Hydro spokesman Dennis<br />

Hunter noted, “I don’t think it will get any worse than it did last year.”<br />

As <strong>of</strong> the morning <strong>of</strong> January 29, there were no reports <strong>of</strong> shoreline homes in danger <strong>of</strong> flooding. In response<br />

to warm weather patterns the ice jam south <strong>of</strong> Taylor and potential flooding receded. The ice front slowly made its way<br />

down the Peace River. By January 30, it was situated at the Taylor Bridge. The ice jam later receded 2.5 km<br />

downstream <strong>of</strong> Highway 97 bridge. The water level at South Taylor dropped 1.5 m.<br />

Early March 1997<br />

Event type: Debris slides.<br />

Precipitation: Not available.<br />

Source: Quesnel Cariboo Observer, March 16, 1997.<br />

182

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