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04/11/1991 - Packet AGENDA TRANSPORTATION ADVISORY COMMITTEE THURSDAY, APRIL 11, 1991 - 7:00 PM TIGARD CIVIC CENTER - COMMUNITY DEVELOPMENT CONFERENCE ROOM 13125 SW HALL BLVD. TIGARD, OREGON 1. CALL TO ORDER 2. ROLL CALL: SCHWEITZ CASTILE DUSEVOIR ETZEL HOLLAND NEWCOMB WATERMAN 3. Approval of minutes of March 14, 1991 meeting. 4. Discussion of proposed revisions to the Comprehensive Plan Transportation Map in the vicinity of S. W. 109th and Naeve Street. 5. Update on Western Bypass Study. 6. Discussion of 1991-1992 Capital Improvement Program. 7. Discussion of S. W. 79th Avenue improvement program and neighborhood coordination. 8. Preparation for April 16, 1991 meeting with City Council. 9. Other business from Committee members. 9. Adjournment TO ENSURE A QUORUM TO CONDUCT BUSINESS, PLEASE CALL LIZ NEWTON AT 639-4171, EXTENSION 308 IF YOU ARE UNABLE TO ATTEND. h:\login\jo\tac A MEMORANDUM CITY OF TIGARI) TO: Transportation Advisory Committee April 3 , 1991 FROM: City Engineer /pn SUBJECT: April meeting � � 1 . Transportation Map At your March meeting, you reviewed a draft of the Comprehensive Plan Transportation Map update. Since then, the map and notes have been revised to include the changes suggested by the Transportation Committee and others . Attached is a copy of the final draft of the map update , for your information. Formal adoption of the map update is scheduled to be considered by the Planning Commission on April 8th and by the Council on April 23rd. If. you have any additional comments on the map update , they should be raised at the April 11th Committee meeting, so that they can be forwarded to the Council prior to final adoption. 2 _ SW 79th Avenue The Council has recently heard some concerns about SW 79th Avenue between Bonita Road and Durham Road. The road is narrow and has no shoulders for pedestrians . Recent development of :several. subdivisions has increased the traffic on 79th. The Council has asked that the Transportation Committee worm_ with the neighborhood and NPO #5 to determine what improvements are appropriate on 79th and how they should be funded. On April 11th , I would like to discuss how you want to approach this project . Should we schedule a large neighborhood meeting? Is there information that you need us to collect first? What is the best way to coordinate with NPO #5? Prior to the April 11th meeting, you may wish to drive along SW 79th to get a better idea of the problems that exist . 3 . SW 109th & Naeve Street. NPO 46 would like to initiate some revisions to the Comprehensive Plan Transportation Map in the vicinity of 109th &. Naeve . At the April 11th meeting, I will update the Committee on the ideas that: the NPO is considering. r.w/ttac-apr The City of ti q o TAYLOR'S See NOTES onT I GARD back of page i Comprehensive 3 PI an w �DCUST � ST Trans P ortation o �N R ya0 71ST AV P N M a p SEE NOTE --1 R _, L \ Figure 3 DAKOTA � L i g h t R a i l� y R fE T LAKE DR 7IGARD URS ! C o r r i d o r 41- LLS M11 N KI ON E , \ Study Area DR DR �\ ` ; SEE NOT 4 . � � 9 �-� N0T S tudy Ar e a Cs N Y y51 T(IN 7) z DINNER � y' EE E 2 . KR Arterial � SE . Z a- j ST 6Ma a' o r a Collector U) jF"�R � 'Alo P� \ N� EE 0 T E 3 . _. _._ � C SEE N M i n o r W Collector TIN > -�- `— LN P NEBROOK ST F r e e w ay w S RDOCK I n t e r e h a n e g 6 s "'1 < �d� �r��yS ST a a r DR r0 z a SUNNERFSELO A W = s oDigital data k map representa— D _�•1.,.— RD z tion compiled by the City of Tigard utilizing Geographic Information Systere (GIS} software. Information �GZoP R portrayed here may be S z intended to be used with Ordinance No . ®RAFT N N U R T H additional technical Mapadopted ���� ;� � � � and/or interpretative p p data as determined by amom the City of Tigard. See back for revision schedule f- ' (MPTRNS) N T E 8 , 3 6 0 0 (3/19/91 ) I COMPREHENSIVE PLAN TRANSPORTATION MAP NOTES COMPREHENSIVE PLAN These notes are a part of the Comprehensive Plan Transportation Map and are TRANSPORTATION IMP intended to provide direction as to the kind and extent of transportation REVISION SCHEDULE improvements which are to occur within the designated study areas. ORDINANCE DATE 1. Scholls Ferry Road to be realigned to connect with Davies Road. Upon completion of the realignment, the existing roadway east of Davies Road shall become a local street with a cul-de-sac terminus at the northwest end. 2. Study area to determine a future connection between the Walnut/132nd intersection and the Gaarde/121 st intersection. A major collector extension of Gaarde Street has been recommended by the Northeast Bull Mountain Transportation Study Report. An indirect connection of minor collectors has been recommended by NPO #3. 3. Approximate alignments are shown for the extensions of 132nd Avenue south of Benchview Terrace, 135th Avenue south of Walnut Street, and Benchview Terrace west of 132nd Avenue. These streets are to be designed as minor collectors with a design speed of 25 m.p.h.. 4. Study area to determine a connection from southbound Pacific Highway (99W), to Main Street. 5. Study area to determine the alignment of (1) a minor collector street connection between 68th Parkway near Red Rock Creek and the Dartmouth Street extension, and (2) a minor collector street connection between 72nd Avenue at Hampton Street and the Dartmouth Street extension, within the westerly portion of the Tigard Triangle. 6. Study area to determine the alignment of connections between Highway 217, Kruse Way, 1-5 and the Tigard Triangle. 7. Connections between Hunziker Street, Hall Boulevard at O'Mara Street (generally) and Bonita Road. 8. Study area to consider extension of Hall Boulevard southward to connect with Boones Ferry Road in Tualatin for either pedestrian or vehicular access. '*age ................. MEMORANDUM CITY OF TIGARD TO: Transportation Advisory Committee March 15 , 1991 FROM: Randy Wooley, City Engi-np7 SUBJECT: Main Street Bridge U Attached for your information is a copy of information which has been delivered to all businesses on Main Street . At this point , the bridge replacement is still within budget and still scheduled for construction this summer . t March 14, 1991 CITY OF TIGARD OREGON MAIN STREET BRIDGE REPLACEMENT PROJECT The Main Street bridge over Fanno Creek is scheduled for replacement this summer. Attached is material describing the options considered for the new replacement bridge. The engineers are proposing that the new bridge be constructed to the full width of Main Street. During construction, they are proposing that the street be kept open to all vehicle and pedestrian traffic. Other options and their estimated costs are described in the attached material. Prior to making a final decision on the design options, an opportunity is being provided for public comment. Any comments or questions regarding the project should be referred to Gary Alfson in the Engineering Department at City Hall, 639-4171. To be considered in the decision, comments should be received by Friday, March 22, 1991. rw/main2 13125 SW Hall Blvd.,RO.Box 23397,Tigard,Oregon 97223 (503)639-4171 March 13, 1991 MAIN STREET BRIDGE REPLACEMENT PRELIMINARY DESIGN REPORT The Project The Main Street bridge over Fanno Creek needs to be replaced. Recent bridge inspections have shown that the timbers in the bridge are deteriorating. Replacement of ' the bridge has been scheduled for the summer of 1991. The design consultants have completed their preliminary engineering design forthe bridge replacement. A copy of the detailed report is available for review at the Engineering Department in Tigard City Hall. Bridge Width The existing bridge has a roadway width of 22 feet, which does not meet current standards. The designers looked at two options for the width of the new bridge. Option A is to build the new bridge with a 44 foot wide street. This option meets the minimum City standards for street width for a major collector street. Option B is to build the new bridge to match the full width of Main Street. Under this option, the. bridge would have a street width of approximately 54 feet. Both options include sidewalks across the bridge on both sides of the street. Fanno Creek The bridge will be designed to accommodate future channel improvements to Fanno Creek as recommended in the City's drainage master plan. The new bridge will provide some minor increase to the channel's capacity to carry flood waters. Full channel improvements will need to be coordinated with downstream work in the future. Bridge Closure If Main Street is closed at the bridge during replacement, construction costs would be reduced and construction .time would be shortened by about a month. Tri-Met has indicated that they could re-route buses during the bridge closure, if necessary. However, bridge cloture would make it difficult to reach Main Street businesses. It would also add to the traffic congestion on the Highway 99W viaduct. Main Street business owners have expressed strong concern about the potential for a bridge closure. They feel that a closure, which would last 3 to 4 months, would greatly reduce their business activity, causing economic hardship. The designers have identified ways to keep the bridge open to traffic under both design options. Costs have been evaluated both with the crossing kept open to traffic and with it closed. Bridge Appearance Attached is a sketch showing how the new bridge railings will look. There are few alternatives which meet all current standards for the railing's ability to withstand vehicle impacts. Alternatives are the more massive railings found on freeway bridges or tubular. railings such as found on the Greenburg Road bridge over Ash Creek. Cost The least expensive alternative is Option A with the bridge closed during construction. This option has an estimated construction cost of $294,000. If the bridge is to be kept open during construction, the least expensive alternative is Option B, because the extra width allows easier staging of construction while maintaining two-way traffic. Both vehicle and pedestrian traffic would be maintained. This option has an estimated construction cost of $314,000. If the bridge is closed during construction, Option B would cost approximately $304,000. The most expensive alternative is to build Option A while keeping the bridge open to traffic. Because of width restrictions, traffic would be restricted to one lane during part of the construction, requiring the installation of temporary traffic signals to maintain two- way traffic. The estimated construction cost is $334,000. Recommendation Engineering staff are recommending Option B with the bridge kept open to traffic during construction. Option B allows the new bridge to match the existing street and sidewalks and it provides more flexibility to accommodate any reconstruction or redesign of Main Street which may occur in the future. Under Option B, the cost of keeping the crossing open is only $10,000 to $20,000 more than construction with the bridge closed. This additional cost appears to be justified in order to avoid the economic and traffic impacts associated with a bridge closure. Citizen Comments Prior to making a final decision on the design option, an opportunity is being provided for public comment. Any comments, questions, or suggestions should be directed to the attention of Gary Alfson, project engineer for the City, 639-4171. To be considered in the decision, comments should be received by Friday, March 22, 1991. rw/mainbr 70'-0"Cts-Clr. Bents I I i I I I � \`J Exist/ng Sort Sew. 1� \ . I ` \ E/. 140.0(2) II I 11/14/90 / Futcre Blke- Existing Grotmd Line Ped path Fu& e Riprap Lined Channel (By Others) MAIN STREET BRIDGE 111=101