1600 121ST ST SE 2016-01-01 MF Import

In additicn, the restrictor stand�ipe shuuld be extended G �� inches above the overflow elevation and capped. The cap should be provided with a one inch vent hole. VeQetated awalea: Spot elevations in the bottom of the swale sliould be given �- at the head of the swale, at the swale outlet, and at approximately 50 foot intervals along the length of the swale. ✓ The swale construction notes and swale plantinq/seedinq requirements must be shown on both the landscaping plan and the storm drainage plan. The landsc�pe plan must be submitted with the next set of plans. The seed application rate and the number of wetland plants for the emerqent swale should be indicated on the seed mix and wetland plant lists, as shown on sheet G/10.�and fl�t �3Ml��rn�h p� s ��.^ ��• There is some concern that the swale and even the outlet of \ �� the oil/water separator may be below the high water level in � the creek at the swale discharge location. This situation, if it exists, would adversely affect the function of both � the swale and the oil/water separator. Th�high_water ela�taLion_in_ the._creek_must be determined and_the_ �r�- � informati,on, including method of cletermination, presented_in. � � ��n the drainage calculations. '�� '� The outlet of the swale, in the wetland buffer area, should �� ( ( 1�`v� be graded to provide a wide discharge area to the creek, � ,�� ✓ with side slopes no greater. tLan 3:1. The swale Gide slopes `� appear to exceed 3:1 as the s�dale nears the wetland buffer area. ,�L' , i �� ' 4;. � i �'' - �,� � ��. r f 8utface Pond Fencin�C Reauirements_: Unless the applicant submits information showing that the pond tneets one of the conditions presented below, the pond must be fenced. The location of ttie fencinq and also the location of the gates necessary to access the pond for maintenance must be shown on the storm drainage plans. All ponds with a maximum depth qreater than three feet are required to be fenced with a six foot hiqh per.imeter fence unless one of the following conditions is met: 1) a 10 foot wide safety bench for every three feet of design water depth and the side slopes of the pond are no greater th�n 3:1 (H:V); or �.