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ti the roadway.Figures 4-6 and 4-7 of the College Park at Mountain House Specific Plan III indicate typical cross- section sets for the landscaping of Grant Line Road. As indicated,three rows of large canopy evergreen trees 30 feet apart are proposed, one each along either side of the roadway and down the center median,with flowering accent trees 15 feet apart proposed along either side of he north-and south-side sidewalks(i.e., seven rows of trees overall). MHMP Section 7.3.7, "Tree Mapping and Conservation Policy"indicates that,"Existing healthy mature trees, particularly those located along Mountain House Parkway and Grant Line Roads, shall be preserved and _ incorporated into the landscape design of the community to the greatest extent practical. Land uses should be compatible with the preservation program for mature trees." The design of major roadways,widening,or reconstruction of existing major roadways shall address the preservation of mature trees in good condition. Based on a tree survey conducted by EDAW,200 trees,primarily mature walnut trees along both sides Grant Line Road, represent mature trees in good condition and thus are encouraged to be preserved under MHMP Section 7.3.7. These trees currently represent a visual feature along this stretch of Grant Line Road, and provide a tree-lined, canopy-covered environment. The trees along Grant Line Road were surveyed in accordance with MHMP Section 7.3.7.The MHCSD has determined that preservation of the trees is not"practical"under Section 7.3.7 because the only way to preserve the trees would be to relocate the Grant Line Road alignment either north or south so as to avoid the trees.The MHCSD has also determined that relocation of Grant Line Road under the proposed project, such that removal of the trees would be avoided, is infeasible. Relocations to the north would be infeasible because: the northern properties are not owned by the College Park developers or the County; bridges over the California Aqueduct and Delta–Mendota Canal,combined with the location of Grant Line Village and the new improvements at the Grant Line Road and Mountain House Parkway intersection,tie the roadway to its present location; and existing residential and agricultural uses north of Grant Line Road would require removal. Relocation to the south would be infeasible for the latter two reasons. Therefore,a significant and unavoidable impact would occur. Mitigation Measure 4.14-1:Visual Quality—Alteration of Visual Character along Grant Line Road from Tree Removal. The College Park developers shall provide new trees on both sides of Grant Line Road and in the median strip, from Mountain House Parkway to the Alameda County line, at a 3:1 ratio to the trees to be removed, or as required by the MHCSD Design Manual,whichever is greater. The trees to be planted shall be 50 gallons in size each,shall be fast growing, and shall be a variety approved by the County that will provide an eventual tree lined appearance similar to what currently exists. Implementation of the above mitigation measure would reduce the alteration of the visual character along Grant Line Road, but not to a less-than-significant impact. A significant and unavoidable impact would remain. IMPACT Visual Quality—Alteration of a Scenic Vista from Mountain House Parkway. The proposed project 4.14-2 would include the development of a 30-acre interim recycled water storage pond on the Pombo property. This could affect the scenic vista across the 30-acre Pombo property currently viewed by motorists on Mountain House Parkway.A significant impact could occur. Under the proposed project, a 30-acre interim recycled water storage pond would be developed on the Pombo q. property(see Figure 4.2-1 in Section 4.2,"Land Use and Agriculture").Two location options are being considered for the pond(1)in the southwest comer of the Pombo property, along the east side of Mountain House College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.14-17 Visual Quality