Significant relief from flood potential during the 100-year event can be achieved by removing the orifice from within the outfall structure. Since our analysis revealed no significant impact to downstream lands, its removal is recommended. In combination with removal of the orifice, the gabion rock that has been placed within the chamber should be removed and openings in the safety grating repairs. The improvementsto the outlet structure shouldentail the following:

e Thecurrentdesign ofthe ditch inlet bar screen is prone to clogging with brush and other floating debris. We observed a significant accumulation of debris during our inspections. We recommendthat a more substantial cage be installed over the end of inlet sewer to mitigate the potential for future clogging. The work should be completed as depicted in the attached design drawings.

7.0 Allowances

In accordance with Sections 29 and 30 of the Drainage Act, we have assessed the warrants for allowances and compensation to the ownersof lands affected by the work for the following:

The downstreamportion of the drain, from Sta. 0+000 to 0+654 is located completely with City- ownedroad rights-of-way. Lands ownedbythe City will be provided at no costto the drain.

Wealso evaluated the warrants for assessing allowances and compensation for lands taken for various reasonsas result of the drainage works, and concluded that a very nominal allowance wasin orderfor the following reasons: