Grand Forks City Council members receive presentation on 2022 overland flooding and risk assessment – Grand Forks Herald
GRAND FORKS — An April surface flood and hazard assessment was presented to members of council at Monday’s city council meeting.
City Engineer Al Grasser detailed rain events and flooding that occurred in the past month, as well as diversion channels and drainage in Grand Forks that mitigate overland flooding across the city.
One of the mitigation efforts under the flood protection system is the English Coulee diversion channel. Grasser said his goal is to intercept surface flood flows entering the city from the Red River.
“When the river is high, as it has been recently, we actually have to close the gates to keep the water from coming back into the city and we have to turn on the pumps,” Grasser said.
In his presentation, Grasser showed photos of various areas of Grand Forks along the English Lane, depicting high water after snowmelt and rain caused the Red River to rise rapidly over the weekend. of April 23.
Another area of the city that Grasser talked about was the Drain 9 diversion structure, where the diversion overflow crosses the spillway to maintain flow in the English Coulée. Grasser said the gates close to avoid having to pump out excessive amounts of water.
Grasser also discussed fields west of I-29 at the south end of town.
“There’s a lot of water out there that we have to figure out how to deal with,” Grasser said. “Again, we’re pushing (ed) a lot of our systems close to max on this 3-inch rain, so I’m concerned about what happens when we get a bigger event.”
At present, the river level is still high, hampering cleanup efforts on the greenway.
In other council news Monday:
- Board members approved a task order agreement with engineering firm Webster, Foster & Weston in the amount of $190,000 for design, tendering and construction administration for the replacement of controls and drives at three of 12 city-owned flood pump stations. The age of the stations makes finding spare parts for equipment increasingly difficult.
- The board approved a Cities Area Transit contract agreement with UND to provide public transportation services on campus. The city will provide rides for UND students, as well as faculty and staff who swipe their IDs to use the buses. For students, the city will submit a monthly bill to the UND student government for $0.75 for each given one-way ride with valid ID. For faculty and staff, the city will submit a monthly invoice to UND Facilities for $1.30 per given one-way trip with valid identification. If students, staff and faculty do not show valid ID, they will be charged the full adult cash fare of $1.50 per one-way ticket. As part of the agreement, the city will also ensure that all buses are well maintained and will provide student government and UND facilities with promotional maps, user guides, and bus usage statistics. ‘UND on the CAT system and the Dial-A-Ride system on a monthly and yearly basis.