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Tesoro del Valle (Phases A, B, C)
Draft Supplemental EIR

noticeable visual changes are limited. Therefore, the Project would not substantially damage
scenic resources within a state scenic highway. Impacts would be less than significant.

Threshold 5.1-5: Would the Project create a new source of substantial shadows, light, or glare
which would adversely affect day or nighttime views in the area?

Level of Significance without Mitigation: Less than Significant

Recommended 1999 FEIR Mitigation Measures: None

Level of Significance with 1999 FEIR Mitigation: Less than Significant

Recommended Project Specific Mitigation Measures: None

Net Level of Significance: Less than Significant

Comparison to 1999 FEIR: The 1999 FEIR did not address impacts related to shadows, light, or
glare.

The Project site is located within an undeveloped area with development located to the south and
southeast (Phase A of project development) and various other developments nearby, including
development in the City of Santa Clarita to the south which includes other residential areas such
as Phase A of the project. Existing ambient lighting from these surrounding land uses include
overhead street lighting along sidewalks, lighting from vehicle headlights, and building
illumination; however, the Project would introduce new permanent light sources where none
currently exist except for adjacent residential lighting in Phase A. Lighting associated with the
Project would include primarily exterior lighting on residences and street lighting but would be
confined to the Project boundaries; however, proposed lighting would add to the nighttime
illumination of the area.

The Project site (Phases B and C) is located within the County’s Rural Outdoor Lighting District
and subject to restrictions in terms of light and glare at night to maintain dark skies at night for the
residents and wildlife in the district. Under the Ordinance, all outdoor lighting shall be fully shielded
such that the top of the fixture is covered and the sides are covered to a point where the light is
projected below a horizontal plane. In addition, the Ordinance includes restrictions on lighting
height, hours of operation, and street lighting. Although the Project is located within the Rural
Outdoor Lighting District, it is located at the southern periphery of the District. Areas to the south
of the Project site, including Phase A of the project which has been constructed, are not located
within the Rural Outdoor Lighting District. Areas not within the District area are predominantly
characterized by existing nighttime sky glow, including the nearby City of Santa Clarita, the
communities of Castaic (near Castaic Lake) and Valencia. With compliance of the requirements
of the County’s Rural Outdoor Lighting District, no significant impacts generated by nighttime
lighting are anticipated. The Project would comply with the County’s Rural Outdoor Lighting
District, impacts to light and glare would be less than significant.

The Project is not anticipated to create substantial shadows on residential units located in Phase
A or on the proposed trails. The Project proposes typical single family residences that generally
would not be located in close proximity to any existing residential units and therefore, would have
minimal shadowing on existing housing. Proposed housing along the extension of Reyes Adobe
Way would be located near existing housing along that roadway; however, the proposed units
would be designed to minimize shading on existing units. Therefore, the Project would not create
a new source of substantial shadows.

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