Fourth Level Assessment- Aquatic Habitat Rehabilitation Plan
Culvert Remediation- baffles and chutes
Culvert C-011 (Figure 19) was the site of both debris removal and a rock weir in 2017 to improve passage. It was subsequently revisited in 2020 to `install a more sophisticated intervention- an outflow chute (Figure 33) built for the PWA by students at the New Brunswick Community College (NBCC) Metals Processing and Construction Department (Figure 34). The project involved installation of a baffle to slow the movement of water within the culvert, as well as the outflow chute at the culvert’s outflow to improve the access of fish to the culvert. This concrete box culvert is on Steeves Brook, a tributary of Webster Brook, which flows into the Pollett near Elgin.
In 2017 a rock weir was installed by PWA at Culvert C-017 (Figure 19) on a private road through a field off of Stewart Rd. east of Elgin. An outflow drop of less than 15 cm can be sufficiently addressed by such a rock weir, however as can be seen in Figure 35 the outflow drop from the perched culvert at this site is greater than that, warranting the use of a combination of a rock weir to raise the plunge pool and an outflow chute to focus the flow and provide fish with easier access the culvert. Like at C-011, the outflow chute for C-017 was built for the PWA by students at the NBCC Metals Processing and Construction Department (Figure 36).
