Lake Erie North Shore Watershed Plan - Niagara Peninsula ...

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LAKE ERIE NORTH SHORE WATERSHED PLAN therefore priority should be placed on establishing riparian habitat along this branch existing riparian should be maintained watercourses are in part managed as municipal drains therefore establishment of riparian corridors should consider future maintenance activities (refer to engineers report and drainage BMP recommendations) agricultural activities and subdivision) 180 between fragmented natural areas (e.g., south subwatershed along Lakeshore Road and east of Cement Plant Road PSW) All restoration measures should where possible, benefit Species at Risk and provincially rare species Carolinian and native species should be used for all projects Project Opportunities Recommended Action for Public and Private Lands NPCA Lake Erie North Shore Geomorphic 1. Bessey Road (EMHeadwaters): This section of watercourse is managed as a municipal drain; Bessey Branch Drain. It has been channelized and lacks any depositional features along the stream bed which indicates Assessment Study (NPCA little flow diversity within the channel. No pools exist along the bed but there is stagnant water present 2009b) throughout the field site. Algae, duckweed, and turbid water were noted during a site visit in 2008. Relatively deep unconsolidated sediment and organics are deposited along the channel bed. An odour was emitted from disturbed sediment which could be decomposing vegetation. Water quality testing should continue to be monitored in this watershed. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. All recommendations should be discussed with the Drainage Superintendent. 2. Lakeshore Road West (EMMa): This section of watercourse is managed as a municipal drain; Eagle Marsh Drain. It has been channelized and lacks any depositional features along the stream bed which indicate little flow diversity within the channel. Bank protection structures exist along both of the banks. These structures consist of a concrete block wall, a concrete wall, and a steel wall. The concrete block wall that exists along the outside bend of the channel is failing. This can be due to undercutting, high flows within the channel, or surface runoff that will remove the sediment from in behind the structure. Fish cover and invertebrate habitat are impacted due to the presence of revetments along the banks, as well as the lack of a riparian buffer. Turbid water and the lack of instream vegetation were noted during a site visit in 2008. There is a floodgate present at this location which would constrict the channel. Water quality should continue to be monitored in this watershed. Increasing the variety and diversity of native plant species within the buffer zone would help to stabilize the bank and limit the amount of sediment entering the channel but this may be difficult due to space constraints from urbanization. If possible, the steel and concrete revetments should be replaced with a soil bio-engineering bank protection structure. This would allow some habitat for fish, insects, and invertebrate along the watercourse, as well as shading adjacent to the channel. All recommendations should be discussed with the Drainage Superintendent. 3. Eagle Drive (EMMa-2): This section of watercourse is managed as a municipal drain; Eagle Marsh
LAKE ERIE NORTH SHORE WATERSHED PLAN Drain. It has been channelized and lacks any depositional features along the stream bed which indicate little flow diversity within the channel. Slow moving water was present within the channel but there were no distinct pools identified. Relatively deep unconsolidated sediment is deposited along the channel bed. Turbid water was noted during a site visit in 2008. The lack of large trees adjacent to the channel impacts cover over the stream. The riparian buffer along the right bank was smaller, most likely due to the residential property and the road. There is bank instability present along the right bank but the herbaceous vegetation covers it. Chunks of concrete were identified along the right bank indicating that some erosion protection measures have been implemented by the landowner. There is an area along the right bank where vegetative debris is being thrown onto the bank. This debris will eventually end up in stream which can cause debris jams and impact water quality. Recommendations for this site include increasing the variety and diversity of native plant species within the buffer zone to provide cover and habitat for fish, insects, and invertebrates. Deep rooted vegetation will help to stabilize the bank which will limit the amount of sediment entering the stream. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. Due to the impact on water quality it is advised that landowners stop throwing vegetated debris over the bank. Water quality should continue to be monitored in this watershed. Proper bank protection measures should be installed along the right bank to ensure adequate stabilization. All recommendations should be discussed with the Drainage Superintendent. 4. Cement Road (EMMa-3): This section of watercourse is managed as a municipal drain; Eagle Marsh Drain. It has been channelized and lacks any depositional features along the stream bed which indicates little flow diversity within the channel. Bank instability is present in the form of slumping and undercutting. The width of the riparian buffer is small along the right bank and also lacks large woody vegetation that would provide shading over the channel. Some trees have recently been planted along the right bank. There is a small area along the left bank near Cement Road where no buffer exists either. Erosion pins were inserted along the left bank near Cement Road and erosion has been identified. Overhanging vegetation along the left bank makes it difficult to determine any other bank instability problems. Turbid and clear water along this study site were noted during various site visits in 2008. A number of carp were seen in the upstream section of this field site. Near Cement Road the bed of the channel is composed of bedrock but upstream there is relatively deep unconsolidated sediment deposited along the channel bed. Recommendations for this site include increasing the variety and diversity of native plant species within the buffer zone to provide cover and habitat for fish, insects, and invertebrates along the watercourse. Deep rooted vegetation will help to stabilize the bank which will limit the amount of sediment entering the stream. Water quality should continue to be monitored in this watershed. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. All recommendations should be discussed with the Drainage Superintendent. 5. Youngs Road (EMMc): This section of watercourse is managed as a municipal drain; Eagle Marsh Drain. It has been channelized and there are a few point bars present within the channel. Relatively deep unconsolidated sediment is deposited along the channel bed. Bank instability is present in the form of bare soil extending up the bank, and fallen vegetation. For most of the field site there is no aquatic vegetation present within the channel. No pools exist along the bed but there is stagnant water present throughout the field site. An oily sheen on the water surface was noted during a site visit in 2008. Riprap was identified along the right bank at a bend in the channel, which indicates that some erosion protection measures have been implemented 181
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Lake Erie North Shore Watershed Plan - Niagara Peninsula ...

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