18 The La Riviere Subdivision Morden Mile 78 to Manitou Mile 100 Leave a reply 2011/05, Mile 80.5, Prov. Hwy. No.3 – looking W. up Pembina escarpment out of Morden. Former CPR, now Boundary Trail Railway Company (BTRC) cantilever traffic signals. Photo – N.F. © Text and Photos exclusive copyright of N. Froese, Author.