San Dimas Municipal Code Art. II Land Use Development Plan

The purpose of Specific Plan No. 21 is to provide for the development of quality industrial uses which include fabrication, manufacturing, assembly, or processing of materials that are already in processed form, wholesaling and warehousing in order to serve the needs of the city and vicinity. The resultant development shall be compatible with the adjacent residential uses to the north, west and south and the existing light manufacturing uses to the east.

(Ord. 871 § 1, 1987)

The property is located at the southeast corner of Cienega and Lone Hill Avenues at the southwestern border of the industrial designation of the general plan zoning for the city. Despite its general plan industrial classification, the property is essentially bounded by residential on the north, west and south sides, a Southern Pacific rail line on the south.

The enclosed aerial photographs vividly illustrate the location of the property vis a vis the neighboring residential and industrial uses.

(Ord. 871 § 1, 1987)

The city has enjoyed considerable development activity over the last few years. Commercial development has focused along Arrow Highway while industrial development has focused on those areas north of the city adjacent to Highway 30 and in the southern areas approximate to the 57/210 Freeway corridor. Residential development, meanwhile, is continuing in the southwest and northern areas of the city. Within this environment, this site represents an opportunity to develop a large parcel of land that is currently undeveloped and is in need of development on a timely basis to accommodate the increased traffic demands placed on Cienega and Lone Hill Avenues. Within the local community setting the objective is to create a business park that is compatible with the adjacent residential uses. To accomplish this, the development will include a substantial amount of site work for streets and significantly more extensive development restrictions to produce a park-like environment such as greater setbacks, grass berming, decorative landscape treatments, mature box trees, and other park-like features.

(Ord. 871 § 1, 1987)

The site has a number of inherent development problems that must be considered to appropriately address the development issues such as setbacks, curb cuts, etc. The two most important issues are the general topography of the site, which includes a ravine running through it and the fact that a main trunk service water line bisects the property at a diagonal. A major storm drain system will have to be installed to resolve the topographical problem. While a number of design compromises will have to be made to allow for development around the water line, which cannot be built upon. A third item having a significant adverse impact on the development, is the odd configuration of the property, which in conjunction with the water line, divides the property into a number of odd shapes that inhibit efficient development.

(Ord. 871 § 1, 1987)

The development of the site will incorporate several major infrastructure improvements. These will include: a storm drain system running through the property from Cienega Avenue to the Southern Pacific railroad right-of-way south of the property to accept the drainage from the property north of the site; an interior street complete with all utilities (i.e. electrical, gas, sewer, water, etc.); and a dedication of additional land for Lone Hill and Cienega Avenues to become one hundred feet and eighty feet right-of-ways respectively with full street curb, gutter and sidewalk improvements related thereto to be installed abutting the property.

(Ord. 871 § 1, 1987)

Due to the odd configuration of the site, limited access off Lone Hill and Cienega Avenues, and extensive setbacks along Lone Hill and Cienega Avenues of twenty-five to thirty feet, the efficiency of the site has been reduced to below standard coverage for an industrial park. This low coverage and extensive landscaping will result in the creation of a pleasant park-like environment, which will blend easily with the adjacent residential and industrial uses.

(Ord. 871 § 1, 1987)

The restrictions noted in Sections 18.534.090, 18.534.100 and 18.534.110, with respect to building setbacks, landscape islands and curb cuts typically inhibit efficient circulation throughout the park by creating dead-end alleys and obstructive landscape islands. In order to improve circulation by mitigating the impact of these restrictions and focusing traffic onto an interior street, the development will also include reciprocal access agreements for adjacent parcels. This will also mitigate the impact of the development on Cienega Avenue traffic, and thereby buffer the project from the residential district to the north.

(Ord. 871 § 1, 1987)

Special consideration has been given to screening truck-loading areas from view from the public right-of-ways off Lone Hill and Cienega Avenues. Truck maneuvering and loading will be designed to provide adequate maneuvering on-site.

(Ord. 871 § 1, 1987)

A copy of the proposed site plan has been included with this specific plan as Exhibit B to indicate how the specific plan is intended to be implemented by the applicant. Any modifications within the scope of Specific Plan No. 21 to the proposed plan will be determined via the city's standard development plan review process.

(Ord. 871 § 1, 1987; Ord. 1324, 6/10/2025)