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HomeMy WebLinkAboutRDA CIRCULATION STDY 8-5-85 lq'Oo 4 JULY 26, 1985'~ ~':~ 8-5-~ Inter Corn TO: FROM: SUBJECT: WILLIAM HUSTON, EXECUTIVE DIRECTOR, TUSTIN COMMUNITY REDEVELOPMENT AGENCY BOB LEDENDECKER, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER SOUTH NEWPORT-EDINGER CIRCULATION STUDY RECOMMENDATION: That the Tustin Community Redevelopment Agency, at their meeting of August 5, 1985, authorize staff to solicit proposals for consultant services for preparation 'of a precise horizontal and vertical alignment for the extension of Newport Avenue based upon Alternative 3, inclusive of staff variation and approve a supplemental budget appropriation in the amount of $40,000.00. BACKGROUND: In January, 1985, Austin-Foust completed the South Newport-Edinger Circulation Study which contained three alternatives for the potential extension of Newport Avenue southerly to Edinger Street. A copy of each of these alternatives is attached for information. At the July 8, 1985 Tustin Planning Commission meeting, the Commission approved a staff recommendation to deny the proposed Lincoln Properties development of a 160 unit multi-family residential complex on the westerly side of Newport Avenue and southerly of Kenyon Drive. Additionally, the Commission requested the Tustin Community Redevelopm6nt Agency (South Central Project area) to prepare a specific Newport Avenue alignment to resolve the potential right-of-way-needs as it relates to the Lincoln Properties development. DISCUSSION: Following is a summary of each Newport Avenue extension and their preliminary estimates of cost: Alternative i This alternative requires an overcrossing of the railroad with a connection to Edinger St. at a location opposite the existing freeway on-off ramps. This alignment is located primarily westerly of existing Newport Avenue and traverses through the previously mentioned Lincoln Properties parcel. Alternative I maintains access to all existing developed and undeveloped parcels within the area by use of frontage roads adjacent to Newport Avenue. Recommended minimum design requirements for both horizontal alignments (radii of curves) and vertical alignment (maximum roadway gradient) are not met in this alternative. The estimated cost for this alternative is $9,000,000.00 inclusive of construction and right-of-way. SOUTH NEWPORT-EDINGER CIRCULATION STUDY JULY 26, 1985 PAGE 2 Alternative 2 This alternative is proposed as an underpass below the railroad with a connection to Edinger St. just easterly of the freeway on-off ramps. This alignment impacts the easterly edge of Lincoln Properties parcel, the westerly edge of the California Apartments and bisects the Case-Swayne Warehouse structure southerly of the railroad. Alternative 2 maintains access to all existing developed and undeveloped parcels within the area by use of frontage roads adjacent to Newport Avenue. Recommended minimum design requirements for the horizontal alignment (radii of curves) are not met in this alternative. The estimated cost for t-his alternative is $11,525,000.00 inclusive of construction and right-of-way. Alternative 3 This alternative can be utilized as either an overpass or underpass with relation to the railroad and is connected to Edinger St. at a point easterly of the freeway on-off ramps. It also provides for the realignment of Del Amo Ave. southerly 'of Edinger St. to meet Newport Ave. This alignment is located farther east than Alternative 2 which results in a greater impact to the California Apartments and lesser impact to the Lincoln Properties development. The Case-Swayne Warehouse structure is also impacted. Alternative 2 maintains access to all existing developed and undeveloped parcels within the area b~ use of frontage roads adjacent to Newport Avenue. Recommended -minimum design requirements for the horizontal alignment (radii of curves) are not met but the vertical alignment minimum requirements are met if Edinger St. is relocated southerly as shown. The estimated cost for this alternative is $11,350,000.00 inclusive of construction and right-of-way. Staff feels that a variation in this alternative might be feasible, wherein the realignment limits would be started further north which would result in additional encroachment into the California Apartment complex and encroachment into the Sycamore Gardens Condominim complex. This variation would undoubtedly increase the project cost, but would also help minimize the deviation from minimum design standards. Alternative 3 as an overpass with the variation as mentioned above is staff's recommendation for further study and the preparation of a precise alignment. It is suggested that a precise alignment be prepared for both the horizontal and vertical elements of the roadway. If this alternative proves to be feasible, it is further suggested that the precise right-of-way requirements be calculated so that an accurate cost estimate for the project can be completed. SOUTH NEWPORT-EDINGER CIRCULATION STUDY JULY 26, 1985 PAGE 3 Staff is requesting that the Tustin Community Redevelopment Agency authorize staff to solicit proposals for consultant services to prepare a precise horizontal and vertical alignment for the extension of Newport Avenue based upon Alternative 3 including the variation as recommended by staff. The estimated cost for these services is approximately $40,000.00. Bob Ledendecker Director of Public Works/City Engineer BL:jr F~- 9'u,r e IV-2 NEWPORT AVENUE EXTENSION ALTERNATIVE 1 (OVERGROSSING) NEWPORT AVENUE EXTENSION ALTERNATIVE 2 (UNDERPASS) Figure IV-4 NEWPORT AVENUE EXTSN$~ON ALTERNATIVE 3 (OVERCROSSING)