PC 2000-48 - Laserfiche WebLink

c) shall be responsible for maintenance of all str. eetscape installed behind curbs and all landscaping installed as buffers between residential use and the Alameda County Transportation corridor and drainage channels. All maintenance responsibilities within the.neighborhood and Phase II Interim Open Space lands (upon City taking ownership) shall be the responsibility of the city. M. NOISE 67) Soundwall~ and Berms. Property Owner shall construct noise attenuation barriers to shield future Project land uses from exterior noise emanating from the 1-680 f~eway and the UPRR railroad tracks. 1-680 Soundberms. Property Owner may construct an. earthen berms parallel to 1- 680 on the west side of the freeway, as shown on Figure 6-1, Noise Attenuation Diagram of the Specific Plan. Alternatively, the Property Owner may requires the City to allow the soundberm to be relocated to the easterly side of Street B. City approval would require City Council approval, by resolution. The soundberm on the west side of the freeway shall be constructed in conjunction with any residential development within the Western Parcel. i) If constructed along the freeway, the height of soundberm in the Western Area shall be 16 feet as measured from existing ground surface adjacent to CalTran's right-of-way line to the top of the berm. The height of the berm may undulate to provide a more natural appearance, but shall not be less than the specified heights. If constructed along Street B, the height of the berm may be reduced, but it must achieve at least the same sound attenuation as the 16-foot berm. The Property Owner shall submit a noise analysis to the City for review should it request approval of the relocated berm, indicating the appropriate height of the berm in this location to provide the same protection as the original 16-foot berm. A noise barrier in this location may be a combination berm/wall if satisfactorily screened by landscapiog. ii) The design of soundberms should also undulate from side to side, such that the berm is not a regular, linear feature paralleling the freeway. iii) Soundberms shall be attractively landscaped, but such landscaping shall not be allowed to grow to such height as to continuously block views from 1-680 to Pleasanton Ridge. Taller landscaping shall be clustered to provide view corridors to the Ridge. Property Owner shall be responsible for maintenance of the 1-680 soundberm landscaping until such time as the City uses the property for a use necessitating the noise attenuation of the soundberm. If a berm along Street B is approved, its landscaping shall be Conditions of Approval Page 37 of 44 August 9, 2000