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► To facilitate the planned expansion of the Grant Line Road corridor,the existing trees will need to be r removed,per the policies contained in the Mountain House Master Plan. ► To mitigate the loss,the entire corridor will be planted with an extensive amount of new trees,including several different species of Oak and California Pepper. These plantings will extend along the entire corridor of Grant Line Road between Mountain House Parkway and the County line. These plantings will occur throughout the median and both streetscapes on either side of the planned roadway widening. ► In addition to the landscaping,entry monumental portal structures,themes in the Civic Italianate architectural style,will be constructed on both ends of the Grant Line Road corridor within the community,per the current requirements of the Master Plan and MHCSD Design Manual,and these structures will contain commemorative plaques that notate the historic Lincoln Highway. ► In addition,pre-approved Lincoln Highway Association signs will be added along the corridor as additional markers to inform motorists,pedestrians,and bicyclists of the significance of this corridor(Trimark 2004). In response to the above proposals,the West Side Pioneer Association responded that all the conditions were mutually agreed upon(West Side Pioneer Association 2004). Therefore,provision of the above street tree and monumentation plan by Trimark would satisfy the Association's concerns with respect to removal of the mature trees along Grant Line Road,consistent with the MHMP Design Manual. As a result,this mitigation was approved to reduce the impacts to the original 1920s tree line to a less-than-significant level.Therefore,removal of the trees associated with the project would be less than significant. Mitigation Measure 4.6-1: Cultural Resources—Destruction/Damage to Known Cultural Resources. No further mitigation is required. IMPACT Cultural Resources—Potential Destruction/Damage to Undiscovered Cultural Resources. Subsurface 4.6-2 disturbances during construction could potentially destroy or damage undiscovered prehistoric or historic cultural resources that may be considered"unique archaeological resources°or historic resources'as defined by CEQA A potentiaW significant impact would occur. The project site is located in a region where significant prehistoric and historic-era cultural resources have been documented.Although no`unique"or"historic"cultural resources(as per CEQA definitions)have been documented on the project site,other than the mature trees planted along Grant Line Road,unrecorded cultural resources could potentially be unearthed or otherwise discovered at the project site during ground-disturbing and construction activities.If such resources were determined to be unique or historic,a potentially significant impact would occur. Mitigation Measure 4.6.2:Cultural Resources—Potential Destruction/Damage to Undiscovered Cultural Resources. If discovery of unknown cultural materials is made during construction, ground-disturbing activities at the construction site where the discovery was made shall be halted.The College Park developers or construction contractor shall contact the San Joaquin County Community Development Department(SJCCDD)immediately, �- and a qualified professional archaeologist acceptable to County staff shall be notified and retained by the College Park developer.The archaeologist shall determine whether the resource represents a`unique archaeological resource"or"historic resource"as defined by CEQA,and shall identify appropriate mitigation.The mitigation could potentially include,but would not necessarily be limited to,avoidance,preservation in place with capping, photo documentation,and/or excavation/curation. Implementation of the above mitigation measure would reduce potential impacts to undiscovered cultural resources during construction to a less-than-significant level. College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.6-21 Cultural Resources