DISCOVERY SCIENCE CENTER OF ORANGE COUNTY - 2002

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LSA ASSOCIATES. INC. ENVIRONMENTAL ANALYSIS MARCH 2002 AMENDMENT NO. I DISCOVERY SCIENCE CENTER The existing facility is a 59,205 sq ft building footprint interactive science learning center and offices with 92 parking spaces on site. The proposed Phase II project is a three stay expansion of the main building with a large format theater (]MAX type) with digital displaydome, additional exhibit areas that double as classroom facilities, expanded diningand retail areas, and a parting structure and connecting bridge at Broadway and Main Place Drive. The project would include the following: 1) a 275 seat theater, 2) an office- warehouse addition — 14,600 (gross) sq ft, attached tothe parking structure, and 3) apprcrcimately 38,000 (gross) sq ft of corridor /exhibit /classroom/theater staging area space. Classrooms /conference areas are included in the exhibit space and Nill be used for either exhibits and/or demonstrations attached to permanent or traveling exhibits, as the need arises. Building heights are as follows: 1) theater /exhibit structure is prgDosed to be 106 feet, and 2) the parking structure is proposed to be a maximum of 27 feet with the office component at 40 feet. The parking structure is proposed to include 253 spaces. Surface parking at the primary site includes nine spaces. On -site bus parking and bus turnaround space are provided in front of the main entrance. A lighted bridge to accommodate vehicle traffic as v"ell as pedestrians is proposed to cross Santiago Creek, connecting the primary access drive from Main Street to the parking structure on a currently vacant property at Broadway and Main Place Drive. Provisions for a bike path connecting the existing bike path along Santiago Creek to a planned undercrossing of the I -5 Freeway are included in project design. No disturbance to Santiago Creek is proposed, as the bridge will be constructed prior to being placed over the creek and will be supported from the creek banks, with no need for pillars. Phase II also includes finishing the cladding on the unfinished sides of the cube icon. The proposed project is described as Phase 11 of the DSC and is detailed in Table A, belay. A revised site plan for the project has been prepared and submitted with the applications on file with the Planning and Development Agency (Exhibit 1). The above components of the plan are defined hereinafter as the Project. Table A: Phase II Expansion: Tectonic Cube Concept Square Footage FIRST FLOOR LOBBY 1790 S.F. TICKETS 170 S.F. CORRIDOR 1700 S.F. EXHIBITS 5480 S.F. SPECIAL EXHIBITS 5700 S.F. PANTRY 300 S.F. STORAGE 160 S.F. SERVICE CORR. 2300 S.F. STAIR 272 S.F. OFFICE 75 S.F. ELECT. RM. 225 S.F. SUBTOTAL INTERIOR 18172 S.F. NIISC. VOID & EXTERIOR WALL 1278 S.F. GROSS FIRST FLOOR 19450 S.F. SECOND FLOOR HAROBRTILES \Amend 1 dsc revi.doc u03'07/02» Page 2 of 17 2