Upper Dam diverts flow from East Channel into West Channel of Eramosa River
The East Channel is a stretch of the Eramosa River that runs through the village of Eden Mills, between Rockwood and the city of Guelph. The East Channel was once a pristine river ecosystem; however, for years, it has been in a state of decline. Why? Because a private dam was built without an environmental assessment or permits in the early 1990s, and blocks water from flowing down into the East Channel during the low flow summer months when the river and aquatic life need it the most. Even though there could be as much as 20 inches of water in the river at the entrance of the East Channel, the Upper Dam blocks the flow completely at those times. This dam continues to cause significant and alarming environmental harm to the East Channel’s river ecosystem. Continue reading
In November of 2015, Ontario Rivers Alliance (ORA) commented on EBR 012-5093, regarding a Technical Bulletin for the Alterations, Improvements and Repairs of Existing Dams. You can find our submission on our Blog here. On March 24, 2016, ORA received a Decision Notice, as well as the approved Technical Bulletin. Continue reading
Project Name: Wanapitei Dam Repair
Project Location: Wanapitei Lake, Sudbury District
Contact: J.L. Richard Engineers
Rehabilitation of 98 meter of existing 221 meter long structure. New fish spawning habitat. New elevated access road. Completed. Presented at the Canadian Dam Association Conference.
Project Name: Bannerman Control Dam Replacement
Project Location: Ulster Township, Sudbury District, ON
Contact: J.L. Richard
There are literally thousands of older control dams in the province that are managed by MNR. It is great to see them being repaired and upgraded, or even removed if they no longer serve any useful purpose.
The Bannerman is located in Ulster Township (North 46″ 51′ 1″, West 8’1^o 35′ 29^), at the southwest outlet of Onaping Lake. Onaping Lake is.approximately 62.16 km2124 mi2;in size with a watershed drainage area of 1015.28 km'(392 mi’). The lake is used as a reservoir. The drainage route through Bannerman dam is into Bannerman (Moncrieff) Creek and then into the Spanish River.
Bannerman dam is constructed of reinforced concrete. lt is has a single log sluiceway, which may contain up to 16 stop logs (7 doubles, 2 singles). The dam also has and eastand westweir. The east weir is 14.63 m (48 ft) in length; the west weir is 10.36 m (34 ft) in length.
The lake level, throughout the year, is presently maintained by following the cumulative rule curve from the 1993 Upper Spanish River Water Management Plan. The lake level is regulated using both the Bannerman dam and the Onaping dam. Generally under normal conditions, Onaping Lake will remain at full supply level (1306.5 to 1307 ft (398.2-398.4m asl) from Victoria Day weekend in May until Labour Day. Drawdown begins in September after Labour Day and discontinues when the lake obtains a level of 1304 ft (397.5 m asl) at Bannerman dam, or October 15th which ever occurs first.
Onaping Lake contains the Onaping Lake Conservation Reserve and the southern portion of the lake is part of an established canoe route to the Onaping River. There are over 200 cottages, along with a tourist lodge and marina. Fishing pressure is high, which the lake supporting species which include lake trout, walleye, whitefish, northern pike and perch.
MNR Site No: 2CA5
Project Name: McCreight’s Dam Replacement
Project Location: Thessalon, ON
Contact: J.L. Richards
Status: Undergoing replacement of existing two gate dam structure. New 8m 2-gate structure. Existing dam used as a coffer dam.