www.exploreinc.ca 1-866-936-1805 April 23, 2020 Attention Pipeline Integrity Division; This is an internal notification to update you of current high flow conditions issued by Alberta Environment and Parks. High flow can lead to waterway bank disruption, erosion, sloughing or scour. When this occurs over or around a pipeline water crossing the chance of a depth of cover failure or pipeline exposure increases. Pipeline leakages can lead to high cost property damage and high impact environmental damage. If you require any depth of cover services or research into pipelines with potential problems, please let us know. Contact Derek Leiman (780-293-1810) or Katie Welter (306- 834-4402). Below are the current notifications in effect. Flood Watch: Paddle and Little Paddle Rivers – April 19 Rapid snow melt on Friday resulted in a very rapid rise in water levels up to 3 m. Areas upstream are still 50-80% snow covered, with estimated snow depth of 20 cm. As this melt in the next few days, it will increase water flows. The overtopping of the Paddle River Dyke was observed at Twp. Rd 584 on April 18th. With additional snowmelt expected in the next few days, the number of locations being overtopped is expected to increase. Agriculture flooding is expected. The Paddle River Reservoir will continue to fill while keeping outflows below 1 m3/s. Medicine River and Lasthill Creek – April 21 Snowmelt has increased water levels in the Medicine River and Lasthill Creek. Additional water level rises are expected, as warm air temperatures are in the forecasted. Flooding near Benalta Road and near Evart's Bridge is expected. Ice Jam Watch: Peace River from Sunny Valley to Fort Vermilion – April 21 The Peace River Ice front was located at km 472 on April 20th (76 km downstream of the Town of Peace River, and 19 km upstream of Sunny Valley). The ice cover remains intact, although water levels are rising. An ice run from the Smoky River is expected to be jammed upstream. Flows are expected to increase over the next few days as more snowmelt occurs in the Smoky basin. Little Red Deer River – Apr 19 An ice jam was reported at the Red Lodge Provincial Park campground, causing flooding of loop roads and campsites. Ice related flooding was reported at Hwy 766 and Twp. Rd 340. Sudden changes in water levels may occur as ice jams shift. As ice jams release, new ones may form in other locations downstream. Behind every explore experience, is trust. Head Office: Calgary Edmonton Office St. Paul Office Drayton Valley Office Box 62, Hanover Place 18941 - 111 Avenue NW Box 1987 -5133 50 Ave PO Box 6267 Suite #1200, 101 6th Ave SW Edmonton, Alberta St. Paul, AB 6521 50th Avenue West Calgary, Alberta T5S 2X4 T0A 3A0 Drayton Valley, AB T2P 3P4 780-455-5598 780-645-3399 T7A 1S1 www.exploreinc.ca 1-866-936-1805 North of High Prairie – April 22 An ice jam has formed on the West Prairie River North of High Prairie causing the river to spill over both banks. Properties and road infrastructure were reported to be affected. Additional water level rises are possible as the snowmelt finished in the area. River Ice Advisory: Smoky River – Apr 19 As high flows and ice runs push out of the Smoky River and into the Peace River, water levels at the Town of Peace River are increasing rapidly. The downstream ice runs from the Smoky River may destabilize the ice over on the Peace river, causing ice jams and greatly accelerating the breakup of the Peace River. Athabasca River from the Town of Athabasca to Fort McMurray – April 21 Tributaries of the Athabasca River are currently breaking up and are expected to initiate the breakup of the Athabasca River. Water levels may fluctuate rapidly. As ice jams release, new ones may form in other locations downstream. Ice breakup at the Town of Athabasca is expected within the next few days, but no large-scale shifting of the ice cover has yet occurred. Athabasca and McLeod Rivers in Woodlands County and Whitecourt - April 21 With well above-average snowpack and warmer temperatures, ice covers have begun to break up on both rivers. Water levels are expected to rise as the snowmelt continues to occur. Spring Runoff Advisory: Central and North Central Plains Region – April 17 The melt may cause localized ponding of meltwater in low-lying areas where water does not have direct route to stream channels. For more information on real-time precipitation and river data go to: http://environment.alberta.ca/apps/basins/default.aspx Behind every explore experience, is trust. Head Office: Calgary Edmonton Office St. Paul Office Drayton Valley Office Box 62, Hanover Place 18941 - 111 Avenue NW Box 1987 -5133 50 Ave PO Box 6267 Suite #1200, 101 6th Ave SW Edmonton, Alberta St. Paul, AB 6521 50th Avenue West Calgary, Alberta T5S 2X4 T0A 3A0 Drayton Valley, AB T2P 3P4 780-455-5598 780-645-3399 T7A 1S1 $OEHUWD5LYHU%DVLQV ±*RYHUQPHQWRI$OEHUWD p 3UHFLSLWDWLRQ0DSV Weekly 'D\ :HHN 0RQWK (YHQWV $OEHUWD5LYHU%DVLQV ±*RYHUQPHQWRI$OEHUWD p 3UHFLSLWDWLRQ0DSV Monthly 'D\ :HHN 0RQWK (YHQWV Slave River No Data River FORT CHIPEWYAN Hay Peace River HIGH LEVEL River Chinchaga River Wabasca River River Clearwater R. FORT McMURRAY Peace PEACE RIVER River GRANDE Athabasca PRAIRIE SLAVE Little Smoky R. LAKE COLD LAKE Smoky River WHITECOURT River Athabasca Pembina R. 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