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HomeMy WebLinkAboutTechnical Memorandum: DRAFT Illinois Street Corridor 10-26-00Technical Memorandum Illinois Street Corridor DRAFT October 26, 2000 Purpose This Technical Memorandum documents a corridor review of proposed Illinois Street from 96th Street to 146th Street in the City of Carmel. (See Location Map, next page.) The purpose of this review is to identify potential alignments, determine probable grades (roadway elevations), and evaluate how the proposed roadway would fit with the surrounding terrain and development. Based on the alignment proposed, a cost estimate is provided to support programming of the project. Approach Technical investigations in this study began with aerial photography provided by the Carmel Department of Community Services. Using elevation data associated with the photographic images, a digital terrain computer model was developed so that three dimensional roadway design software could be applied. Typical roadway sections were generated and applied to preliminary centerlines both horizontally and vertically, producing a vertical view of the roadway, superimposed on actual terrain, at any point along the centerline. The results were reviewed with the U.S. 31 Task Force, and alignments and options were finalized. Report Format Information in this Technical Memorandum is presented in three sections. Section 1 illustrates the typical roadway cross sections considered for Illinois Street. Generally, planning is based on an ultimate width of five lanes (or four lanes with center median), as shown on the first sheet. The second sheet shows a three -lane section with shoulders. If constructed as an initial stage, this section could easily be widened to five lanes later. The third section represents a curbed three -lane section. This option was not selected by the U.S. 31 Task Force. Section 2 provides aerial views of the proposed Illinois Street alignment from south to north. Accompanying each sketch is a location map and text to place the segment in context and to highlight any pertinent review comments. Where options still exist at this stage, these are identified and discussed. Section 3 provides a cost estimate for construction of the alignment identified. Related Studies This study is closely related to a separate Technical Memorandum entitled U.S. 31 Depressed Roadway Review (Draft), dated October 5, 2000. Both studies are based on the same aerial photography and digital terrain model. This insured a consistency of base assumptions and results for both studies. Draft Technical Memorandum 1 October 26, 2000 Table of Contents Introduction 1 Purpose Approach Report Format Related Studies Section 1 - Illinois Street Typical Roadway Cross Sections 3 3 and 2 Lane 5 and 4 Lane 3 and 2 Lane with ditches Section 2 - Proposed Illinois Street Alignment 7 96th Street and Spring Mill Road to 106th Street 106th Street to 111th Street 111th Street to 116th Street 116th Street to 126th Street 126th Street to 131st Street 131st Street to 136th Street Section 3 - Cost Estimate 20 Section 1 - Illinois Street Typical Roadway Cross Sections Draft Technical Memorandum October 26, 2000 Section 2 - Proposed Illinois Street Alignment Draft Technical Memorandum October 26, 2000 96t. Street and Spring Mill Road to 106t Street • The Illinois Street Corridor Study begins with a roundabout at the 96th Street and Spring Mill Road intersection. • Existing Spring Mill Road has two lanes. The two lanes widen to three lanes just north of the bridge over 1 -465. A curve to the east directs Spring Mill toward the Illinois Street corridor 500 feet north of the bridge. At this curve, existing Spring Mill will be realigned to tee into the Illinois Street Corridor. The corridor widens to five lanes at the proposed realignment of Spring Mill and Illinois Street. • North of the existing 103rd Street traffic circle, three alternatives for Illinois Street have been defined. Alternative 1 allows the most distance between Illinois Street and the proposed Urban Interchange at 106th Street and U.S. 31. This distance allows for reasonable approach length for turning movements to the interchange. It also maintains a more direct route north / south for the corridor. This alignment proceeds to the west of the two businesses located on the north side of 106th street, minimizing the impacts on the properties. However, a property to the south of 106th street will be impacted by this alignment alternative. Alternatives 2 and 3 do not affect the property to the south of 106th street, but they impact either one or both of the properties to the north. These alternatives offer a less direct north / south route than Alternative 1. More importantly, they are spaced so closely to the proposed urban diamond interchange at U.S. 31 that proper establishment of lanes to serve the 106th Street interchange appears infeasible. Alternative 1 is recommended due to the service conflicts caused by Alternatives 2 and 3 at the 106th Street/U.S. 31 interchange. Due to the probability that U.S. 31 access will not be available at 103rd Street, good service at 106th Street will have added importance in the future. Draft Technical Memorandum October 26, 2000 1061 Street to 111 t Street • A roundabout is proposed at the intersection of 106th Street and the proposed Illinois Street corridor. • In coordination with the proposed U.S. 31 freeway, it is recommended that Tottenham Drive have a cul -de -sac closing the existing access at 111th Street. The elevation or depression of U.S. 31 will inhibit the grade of 111th Street to accommodate access to Tottenham Drive. An access point onto Illinois Street south of 111th Street is recommended. Future development and intersection spacing should be analyzed for proper placement of the access point. Draft Technical Menaorandeun 10 October 26, 2000 • A roundabout is proposed at the intersection of 111th Street and the proposed Illinois Street corridor. • As with the access issues on 111th Street, it is recommended the Fidelity Plaza's entrance onto 116th Street be closed. The proximity of the proposed Urban Interchange at 116th Street with U.S. 31 does not allow for acceptable lane configurations and grades. Access points along the Illinois Street corridor south of 116th Street are recommend in this area as well. Draft Technical Memorandum 12 October 26, 2000 1161 Street to 1261 Street • A roundabout is proposed at the intersection of 116th Street and the proposed Illinois Street corridor. • North of 116th Street, three alternatives have been defined for Illinois Street. All three alternatives direct the corridor to the east into close proximity with U.S. 31 for a short distance. Consideration of the grade of the proposed U.S. 31 freeway will determine the elevation of Illinois Street at this location. The need for retaining walls will be likely. All three alternatives satisfy appropriate design criteria. They differ primarily in their impact on the land through which they pass. Ultimately, discussions with the property owner, the City and planners could aid in determining the "best -fit" alternative for the corridor through this area for future development. Although the alternatives are equivalent in terms of transportation service, Alternative 1 is recommended in this study since it appears to maximize the development potential of adjacent properties. • Aligning the corridor to the west of the existing commercial development north of 116th Street would provide a smoother transition for north / south movement, but would require the removal of existing homes and would not serve existing businesses effectively. • Two alternatives have been defined for Illinois Street connecting with 126th Street. These alternatives vary in their proximity to U.S. 31 and where they intersect with 126th Street. Alternative 1 aligns Illinois Street to the west of existing office buildings on 126th Street, allowing for smoother grade transition at the crossing of 126th Street and U.S. 31. Alternative 2 keeps Illinois Street close to U.S. 31. The proximity of this access point on 126th Street with U.S. 31 poses a probable steep grade depending on the elevation of the proposed U.S. 31 freeway alternative, but less developable property is impacted. Alternative 1 is recommended as the best long term option since it eliminates concerns related to placing a roundabout next to the 126th Street bridge over U.S. 31. Draft Technical Memorandum 14 October 26, 2000 1261 Street and 131st Street • A roundabout is proposed at the intersection of 126th Street and the proposed Illinois Street corridor. • The Illinois Street corridor utilizes existing pavement through this section. Minor widening may be necessary to establish a cross section consistent with the rest of the Illinois Street corridor. Draft Technical Memorandum 16 October 26, 2000 131st Street to 1361 Street • A roundabout is proposed at the intersection of 131st Street and the proposed Illinois Street corridor. • Illinois Street will follow existing pavement to the northeast to its existing terminus. The corridor will continue northeast and connect with a roundabout in the proposed 131st Street / U.S. 31 Interchange. The proposed configuration will provide continuity (connectivity) of Illinois Street with Pennsylvania Parkway. • North of the Illinois / Pennsylvania roundabout, the Illinois Street corridor runs parallel with the U.S. 31 alignment and terminates at the intersection of 136th Street and Oak Ridge Road with a roundabout. Draft Technical Memorandum 18 October 26, 2000 Section 3 — Cost Estimate ILLINOIS STREET COST ESTIMATE STREET SEGMENT LENGTH APPROACH WK COST ROUNDABOUT RNV COSTS TOTAL COST 96th St. to Bridge 1034 400 $1,086,364 $125,000 $73,239 $1,284,603 Bridge to 103rd St. 2417 250 $2,020,455 $194,792 $2,215,246 103th St. to 106th St. 2055 250 $1,746,212 $125,000 $320,665 $2,191,877 106th St. to 111th St. 2674 250 $2;215,152 $125,000 $754,525 $3,094,676 111th St. to 116th St. 2680 250 $2,219,697 $125,000 $1,168,671 $3,513,368 116th St. to Carmel Drive 6082 250 $4,796,970 $125,000 $1,533,003 $6,454,973 Carmel Dr. to 131st St. 2720 250 $2,250,000 $125,000 $239,906 $2,614,906 131st St. to Interchange 1676 250 $1,459,091 $125,000 $252,936 $1,837,026 Interchange to 136th St. 4091 250 $3,288,636 $125,000 $1,967,113 $5,380,749 Note: RAN Costs are for and purchases only. GRAND TOTAL $28,587,425.38 Draft Technical Memorandum 20 October 26, 2000