East Main Street Bypass Project Preliminary Design Report

Transcription

1 East Main Street Bypass Project Preliminary Design Report City of Klamath Falls June 2004 Consultant Team Kittelson & Associates, Inc. Zbinden Carter Engineering, Inc. Shapiro & Associates, Inc. Right-Of-Way Associates, inc. Rhine Surveying KITTELSON & ASSOCIATES, INC. TRANSPORTATION PLANNING/ ENGINEERING

2 June 2004 Page 1 Residents, businesses, and property owners will benefit from a plan to ease traffic congestion and improve safety through the development of a bypass for East Main Street, between South Sixth Street and Washburn Way, in Klamath Falls, Oregon. The East Main Street Bypass Project was conceived as part of the 1997 Klamath Falls Transportation System Plan, and recently gained funding through the 2002 Oregon Transportation Investment Act (OTIA). The purpose of this project is to provide planning level traffic and engineering analyses that will lead to the design and construction of seven key improvement subprojects that comprise the East Main Street Project. Figure 1 highlights the seven subprojects. Subproject #1: The construction of the new bypass for East Main Street between East Main Street/South Sixth Street to the Washburn Way/Crosby Avenue intersections with all the necessary support utilities for development. Subproject #2: The implementation of access management on Washburn Way and South Sixth Street in the vicinity of the South Sixth Street/Washburn Way intersection to stop or control turning movements across traffic into various commercial businesses. Subproject #3: The construction of a dedicated right-turn lane from eastbound South Sixth Street onto southbound Washburn Way. Subproject #4: Modifications to the East Main Street/South Sixth Street intersection to ensure proper and safe turning movement onto the new bypass road. Subproject #5: Modification of Klamath County s Crosby Avenue and Maywood Drive aligning these existing roads with the new bypass road and provide sufficient capacity for turning movements. Subproject #6: The installation of a pedestrian/bicycle signal on Washburn Way where the State s OC&E bike trail crosses this busy corridor. Subproject #7: Rehabilitation of the South Sixth Street road surface from Broad Street to Austin Street, including the bridge deck on the South Sixth Street overpass. SUMMARY OF PROJECT PROCESS The existing condition evaluation included preliminary engineering reports (i.e. geotechnical investigation, stormwater drainage analysis, South Sixth Street rehabilitation, potable water and sanitary sewer analysis, and private utilities investigation), as well as the environmental and cultural investigations (i.e. wetland delineation investigation, biological assessment, and archaeological [cultural] resources investigation). In addition, the project addressed traffic analysis, alternative development, pre-design level evaluation of the owner s preferred alternative and cost estimate development.

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4 June 2004 Page 3 A conceptual alignment of the bypass was established first to determine the extent of the survey through the undeveloped South Suburban Sanitary District (SSSD) property. Concurrent with the survey, traffic counts were conducted and locations of utilities confirmed with as-built information obtained from the respective government agencies. The transportation operation analysis of the seven associated improvement subprojects was conducted to identify the necessary extent and cost of these improvements. The conceptual layouts of the proposed improvements determined the extent of the potential right-of-way dedications. Concurrently, the geotechnical, wetland delineation, biological assessment, and archaeological (cultural) investigations were being conducted. The preliminary proposed improvements were presented to the City of Klamath Falls and the public throughout the duration of the project. Two public meetings were held and stakeholder interviews were conducted with the property owners potentially impacted by the proposed road improvements. The agencies and the public provided input which lead to the selection of the preferred improvements. The property acquisition evaluation and design of the different engineering utilities were completed for the preferred improvements. Next, the permitting processes necessary for the construction of the road improvements were determined and summarized. Finally, planning level cost estimates were prepared in such a way that the road improvements could be implemented as a series of different projects (phased implementation), and as funding is made available. SUMMARY OF PRELIMINARY ENGINEERING STUDIES/REPORTS Geotechnical Investigation The geotechnical investigation addressed design and construction issues involved with the extension of East Main Street through South Suburban Sanitary District property to connect with Crosby Avenue (Subproject #1). The remainder of the subprojects involved access management modifications and intersection improvements to existing public facilities and typically do not involve subsurface work below 18 of depth. The subsurface soils encountered at the project site are generally favorable for roadbed embankment construction using conventional methods. However, subgrade stabilization improvements involving excavation, geotextile stabilization, and the placement of imported fill will be required. (For more details please refer to Technical Memorandum #1.) Stormwater Drainage Analysis A planning level assessment of the storm sewer systems was conducted that would service new commercial and industrial development along the proposed East Main Street Bypass. The assessment identified existing storm sewer system locations that serve as tributaries to the development. In addition, conceptual recommendations have been developed to improve existing and assist in creating new storm collection systems along the proposed improvement and surrounding area. (For more details please refer to Technical Memorandum #5.)

5 June 2004 Page 4 South Sixth Street Pavement Rehabilitation Due to the magnitude of the proposed improvements to the East Main Street and Washburn Way intersections with South Sixth Street, it would seem impractical to perform intersection improvements without addressing the sub-standard pavement sections between the intersections. The last time this pavement was improved was in 1996, and at present, the wearing surface on South Sixth Street suffers from various classifications of pavement damage, including severe rutting and random cracking. Upon examination of the existing field conditions, it is apparent that the pavement damage is primarily the result of inferior pavement mix and not necessarily related to base failure. This suggests that the base and subgrade are fairly stable even though they are relatively thin. Mill and fill techniques, rather than pavement section removal and replacement, can be considered as a pavement rehabilitation option. (For more details please refer to Technical Memorandum #6.) Potable Water and Sanitary Sewer Analysis A planning level assessment was conducted of the potable water and sanitary sewer systems that would service new commercial and industrial development within the proposed East Main Street Bypass corridor. The assessment identified existing potable water and sanitary sewer system locations and provided conceptual recommendations for the extension of these services along the proposed improvement. (For more details please refer to Technical Memorandum #7.) Private Utilities Investigation A planning level assessment of the locations and availability of private utility services has been performed for the proposed commercial and industrial development within the East Main Street Bypass Project limits. Private utilities researched include electrical power, natural gas, cable, and telephone. (For more details please refer to Technical Memorandum #8.) SUMMARY OF ENVIROMENTAL AND CULTURAL INVESTIGATIONS Wetland Delineation Investigation The area investigated for wetland delineation is currently undeveloped land to the north of the South Suburban Sanitary District sewage treatment ponds. The investigation of soils, hydrology, and vegetation indicates that approximately 3.15 acres of the site have characteristics consistent with jurisdictional wetlands. The identified features are wetlands because previous excavation (combined area of ditches is approximately 1.04 acres) has resulted in the water table being closer to the major root zone of the vegetation. None of the ditches has a free and open connection to any nearby lake. No significant concerns have been identified during this investigation. It is recommended that that the U.S. Army Corps of Engineers (Corps) and Oregon Department of State Lands (formerly Division of State Lands) be consulted and/or a permit application be submitted before any ground activity is conducted within the wetland areas of the project site. (For more details please refer to Technical Memorandum #2.)

6 June 2004 Page 5 Biological Assessment for Endangered Species Act (ESA) Compliance The listed species that are anticipated in the project area are Applegate s Milkvetch (Astragalus appelgatei), listed endangered, bald eagle (Haliaeetus leucocephalus), listed threatened; Shortnose sucker (Chamistes brevirostris), listed endangered; and Lost River sucker (Deltistes luxatus), listed endangered. At this time, the determinations of effect are: May Affect, Not Likely to Adversely Affect: Bald Eagle and Applegate s Milkvetch; and No Effect: Lost River and Shortnose suckers. A Biological Assessment must also address possible future effects of an action, such as development of an area because it is now accessible by a new road (indirect effects), and interdependent or interrelated activities that occur only because they are a necessary part of the project. The analysis of these effects may lead to a May Affect, Likely to Adversely Affect determination for Applegate s Milkvetch. (For more details please refer to Technical Memorandum #3.) Archaeological (Cultural) Resources Investigation No cultural materials were observed during monitoring or subsurface archaeological investigation of the area. The finding is that intact, potentially significant archaeological resources are unlikely to be located within the areas that would be physically impacted by the construction of the new East Main Street Bypass. It is recommended that no additional archaeological investigation is necessary for the construction site. In the unlikely event that archaeological material is encountered during construction, an archaeologist should immediately be notified and work will be halted in the vicinity of the finds until they can be inspected and assessed. (For more details please refer to Technical Memorandum #12.) SUMMARY OF TRANSPORTATION AND FUNCTIONAL DESIGN ANALYSIS Existing Traffic Conditions Analysis This analysis addressed the existing transportation operations, identified near-term deficiencies within the study area and summarized the necessary mitigation improvements to address these deficiencies. The South Sixth Street/Washburn Way intersection, as well as the driveways to businesses in the vicinity of this intersection, currently operates unacceptably. The remainder of the study intersections operates within operational thresholds under existing conditions, but will require improvement in the near future. Field observations recorded low pedestrian and bicycle activities in the vicinity of the OC&E trail crossing on Washburn Way. A gap study shows that there are an insufficient number of adequate gaps to cross Washburn Way at the crossing although a pedestrian/bicycle signal would not be warranted. (For more details please refer to Technical Memorandum #9A.) Future 2023 Traffic Conditions Analysis This analysis forecasts the future year 2023 traffic conditions, identifies necessary long-term geometric and traffic control improvements, and develops an implementation plan to maintain safe and efficient operation within the study area and along the East Main Street bypass alignment. In addition, the memorandum also addresses the impact of the potential development of the South Suburban Sanitary District (SSSD) property on the transportation system. All study

7 June 2004 Page 6 intersections are expected to operate above the required operational thresholds. For the transportation system to operate acceptably, it is recommended that the capacity improvements outlined in Table 1 be implemented by the Year Table 1 Proposed Road Capacity Improvements Intersection/Road Segment Proposed Improvement Add eastbound and westbound left-turn lanes with protected phasing. South Sixth Street/East Main Street Add southbound left-turn lane with protected phasing. Add dual northbound left-turn lanes with protected phasing. Add eastbound right-turn lane and run as overlap phase. Change north/south split phasing to protected left-turn phasing. South Sixth Street/Washburn Way Re-stripe southbound approach to accommodate left, through, and shared through/right lanes. Widen the northbound approach to accommodate dual left-turn, two through and right-turn lanes. Run northbound right-turn as overlap phase. Lengthen (and standardize) eastbound right-turn lane and run as overlap phase. South Sixth Street/Avalon Street Crosby Avenue/Washburn Way Add eastbound right-turn lane with permissive phasing. Change north/south permissive phasing to protected left-turn phasing. Add dual northbound left-turn lanes with protected phasing. This would require two receiving lanes along the bypass. Add east- and westbound left-turn lanes with permissive phasing. Add eastbound right-turn lane and run as overlap phase. Change side street approaches to left-turn and shared through/right turn lanes. East Main Street Bypass/ Maywood Street Widen westbound approach to accommodate left, through, and through/right turn lanes Provide left-turn and shared through/right-turn lanes along eastbound approach. South Sixth Street Washburn Way Access management investigation will address operation of driveways along South Sixth Street. Access management investigation will address operation of driveways along Washburn Way. Construct three lane cross section. East Main Street Bypass Intersection geometry for future access to SSSD property (in conjunction with access management) needs to be evaluated during their land use application The results of this memorandum formed the basis for developing the preferred functional layouts. (For more details please refer to Technical Memorandum #9B.)

8 June 2004 Page 7 Functional Design Analysis This task developed functional layouts for each of the subprojects within the East Main Street Bypass project as shown in Figure 1. The functional design considered the classification of the facilities, the City s standards, and public input gathered during the public meetings and stakeholder interviews. The proposed improvement for each of the seven subprojects is briefly discussed below. (For more details please refer to Technical Memorandum #10.) Subproject #1 - East Main Street Bypass The East Main Street Bypass is designed as the continuation of East Main Street south of South Sixth Street and Crosby Avenue west of Washburn Way. The proposed alignment joins the two tangents with a large radius curve as shown in Figure 2. Subprojects #2 and #6 - Access Management along Washburn Way, and Installation of Pedestrian/ Bicycle Signal at OC&E Trail crossing on Washburn Way In the future, several driveways are expected to experience relatively long delays, and there will be insufficient capacity along South Sixth Street and Washburn Way to accommodate minor street movements. In addition, pedestrian and bicycle movements at the OC&E Trail crossing on Washburn Way will have an insufficient number of adequate gaps to cross Washburn Way. Several access alternatives were discussed with the property owners located in the vicinity of the South Sixth Street/Washburn Way intersection. An internal access road system was developed to serve all the property owners in the southwest quadrant of this intersection. Traffic flow between and through these parking areas would be rerouted to the internal access road system and allow for vehicles to enter and exit the businesses via the two proposed new signalized intersections on Washburn Way and South Sixth Street. Washburn Way, south of South Sixth Street, will have a raised median. This raised median will extend from the South Sixth Street/Washburn Way intersection to the new combined Burger King/Safeway Store driveway. At this driveway intersection, the driveways will be restricted to a left-in/right-in/right-out access only. Due to the limited access, vehicles will divert to the proposed signalized access at the OC&E trail crossing on Washburn Way to access local businesses. This signal would serve two purposes: the first would be to allow for easier access to the businesses in the southwest and southeast quadrants of the South Sixth Street/Washburn Way intersection; and the second would be to allow for patrons on the OC&E Trail to cross Washburn Way safely and easily. The second proposed traffic signal will be located at the South Sixth Street/Lark Street intersection. This traffic signal would also be utilized as another controlled access for the businesses in the southwest quadrant of the South Sixth Street/Washburn Way intersection. In addition, the South Sixth Street/Avalon Street intersection will be improved by adding an eastbound right-turn lane. The signal will be modified to accommodate the relocation of the signal pole due to the addition of the right-turn lane, as well as changing the existing permissive north-south phasing to protected left-turn phasing.

9 East Main Street Bypass Project June 2004 N (1" = 300') EAST MAIN ST SHASTA WAY SOUTH 6TH STREET SIGNAL (UNCHANGED) NEW INSTALLED OC & E TRAIL NEW INSTALLED PROPOSED BYPASS MAYWOOD STREET WASHBURN WAY CROSBY AVENUE SUBPROJECT #1: PROPOSED EAST MAIN STREET BYPASS ALIGNMENT KLAMATH FALLS, OREGON 2 FIGURE H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

10 June 2004 Page 9 Although there are some impacts to properties, there is potential accessibility and timesaving gains due to signalized access and optimized internal flow of traffic. The preferred functional plan for this area is shown in Figure 3. Subproject #3 - Modification of East Main Street/South Sixth Street intersection The implementation of the bypass requires adding turn lanes at the East Main Street/South Sixth Street intersection. Intersection improvements are shown in Figure 4. To avoid impacts to an existing building in the southwest corner of the intersection lane widths were reduced and widening of South Sixth Street will be focused to the north. Subproject #4 - Lengthening of Eastbound Right-Turn at South Sixth Street/Washburn Way intersection Mitigation measures at this intersection include: lengthening (standardizing) the eastbound rightturn lane, changing the north-south phasing (split phase to protected left-turn) and modifying the lane configuration, including widening Washburn Way. Figure 5 shows the proposed intersection geometry. As part of this subproject, a 12-foot wide and 200-foot long eastbound right-turn lane was included in the design. It is proposed to re-stripe the westbound lanes along the east leg of the intersection to accommodate two 14-foot left-turn lanes, a 12-foot inside through lane and a 14-foot shared outside through/right-turn lane. In addition, the crosswalk at the south leg of the intersection is moved further south. Together, these re-striping mitigations would improve the operation of the westbound left-turn lanes. Subproject #5 - Aligning Crosby Avenue/Maywood Street intersection with Bypass This intersection is located approximately 600 feet west of Washburn Way on the future bypass and is shown in Figure 6. The westbound approach will have a left-turn, through, and a shared through right-turn lanes. The two through lanes will merge into one lane approximately 350 feet west of the intersection and match the typical cross-section for the East Main Street Bypass. These two westbound through lanes are fed by the dual northbound left-turn at the Washburn Way/Crosby Avenue intersection. To accommodate an additional left-turn lane, Washburn Way will be widened to the west. Due to the closely spaced intersections along Crosby Avenue, it is proposed that all the existing driveways along both sides between Washburn Way and Maywood Street be combined into one single unsignalized intersection. All property owners found such an arrangement acceptable. Subproject #7 - Rehabilitation of South Sixth Street This subproject involves the rehabilitation of South Sixth Street between Broad Street and Austin Street. Two road sections of South Sixth Street will be addressed by Subproject #3 (Owen Street to Martin Street) and Subproject #4 (Western Rite-Aid Driveway to Avalon Street) where additional road widening will occur. The section between Martin Street and the western driveway of Rite-Aid will be rehabilitated and re-striped to accommodate a five-lane cross section without additional widening. The remainder of South Sixth Street will include rehabilitation of the pavement with the new striping matching the existing striping layout. Figure 7 illustrated the geometry of the South Sixth Street corridor between Owen Street and Avalon Street.

11 East Main Street Bypass Project June 2004 LARK ST N SOUTH 6TH ST (1" = 100') NEW INSTALLED WASHBURN WAY OC & E TRAIL NEW INSTALLED SUBPROJECT #2: PROPOSED ACCESS MANAGEMENT IN THE VICINITY OF THE SOUTH SIXTH STREET/WASHBURN WAY INTERSECTION KLAMATH FALLS, OREGON 3 FIGURE H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

12 East Main Street Bypass Project June 2004 N (1" = 100') RADCLIFFE AVE OWENS ST SOUTH 6TH STREET UNION AVE EAST MAIN ST SHASTA WAY SUBPROJECT #3: PROPOSED ROAD IMPROVEMENTS IN THE VICINITY OF SOUTH 6TH STREET / SHASTA WAY / EAST MAIN STREET INTERSECTIONS KLAMATH FALLS, OREGON 4 FIGURE H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

13 East Main Street Bypass Project June 2004 N (1" = 100') SOUTH 6TH ST WASHBURN WAY PERSHING WAY SUBPROJECT #4: PROPOSED ROAD IMPROVEMENTS IN THE VICINITY OF WASHBURN WAY / SOUTH 6TH STREET INTERSECTION KLAMATH FALLS, OREGON 5 FIGURE H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

14 East Main Street Bypass Project June 2004 N (1" = 100') PROPOSED BYPASS MAYWOOD STREET CROSBY AVENUE WASHBURN WAY SUBPROJECT #5: PROPOSED ROAD IMPROVEMENTS IN THE VICINITY OF WASHBURN WAY / CROSBY AVENUE INTERSECTION KLAMATH FALLS, OREGON 6 FIGURE H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

15 East Main Street Bypass Project June 2004 N (1" = 250') OWENS ST EAST MAIN ST SHASTA WAY SOUTH 6TH ST SIGNAL (UNCHANGED) LARK ST PERSHING WAY PROPOSED BYPASS NEW INSTALLED OC & E TRAIL WASHBURN WAY AVALON ST FIGURE SUBPROJECT #7: REHABILITATION ALONG SOUTH SIXTH STREET KLAMATH FALLS, OREGON 7 H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

16 June 2004 Page 15 SUMMARY OF PERMITTING REQUIREMENTS Figure 8 shows an overview flow diagram illustrating the anticipated schedule for preparing the necessary documents and submitting those to U.S. Army Corps of Engineers (Corps), State Historic Office (SHPO) and Oregon Department of State Lands (formerly Division of State Lands) for their review and approval. All the required permits will be issues by these associations. (For more details please refer to Technical Memorandum #4.) SUMMARY OF PLANNING LEVEL COST ESTIMATES The conceptual cost estimates are broken into construction costs, professional fees, and property acquisition costs. In addition, the construction cost was separated between work within public right-of-way (public facilities) and work on private properties (on-site modifications). The affected properties were inspected and photographed. Cost estimates associated with these impacts include appraisal fees, estimate the cost of the land and improvements for the right of way, the cost of purchasing the "whole take", which will trigger relocation, and the estimated relocation benefits for the displacee. (For more details please refer to Technical Memorandum #11.) Due to the available funding and the immediate requirement of improvements along the existing facilities, it was suggested to divide the entire project into two packages. The first package focuses on South Sixth Street and Washburn Way (existing facilities), while the second package addresses the new East Main Street Bypass between South Sixth Street and Washburn Way. Project Package #1 Project Package #1 includes the following road improvements, and required right-of-way acquisition listed below. All the required right-of-way associated with the entire project (all seven subprojects). Roadway improvements associated with Subprojects #2 and #6. (This addresses the access management along Washburn Way and South Sixth Street in the vicinity of the South Sixth Street/Washburn Way intersection, while incorporating the installation of pedestrian/bicycle signal at OC&E Woods Line State Trail crossing at Washburn Way, as well as the signal modification at the South Sixth Street/Avalon Street intersection.) Road improvements associated with Subproject #3A (This includes only the improvements along South Sixth Street and East Main Street north of South Sixth Street in the vicinity of the East Main Street/South Sixth Street intersection. No improvement is anticipated south of the southern right-of-way line of South Sixth Street.) Road improvements associated with Subproject #4. (This improvement lengthens the eastbound right-turn lane at the South Sixth Street/Washburn Way intersection.) Road improvements associated with Subproject #7 (This rehabilitation along South Sixth Street stretched from Broad Street to Austin Street.

17 East Main Street Bypass Project June 2004 FIGURE OVERVIEW PERMITTING FLOW DIAGRAM KLAMATH FALLS, OREGON 8 H:\PROJFILE\DWGS\FDA MEMO\FIGS08-12,14,16,18.dwg KITTELSON & ASSOCIATES, INC.

18 June 2004 Page 17 Table 2 summarizes the cost estimates associated with Project Package #1. Table 2 Estimated Project Cost for Project Package #1 Description Cost Construction Cost Public Facilities On-site Modifications $5,358,000 $1,072,000 Professional Fees $678,000 Property Acquisition Cost $799,000 1 Total Estimated Project Cost for Project Package #1 $7,907, This amount includes all right-of-way costs and the costs associated with the common access easement agreements. Project Package #2 Project Package #2 includes the road improvements listed below: Road improvements associated with Subproject #1 (This includes the improvements for the East Main Street Bypass between Shasta Way and Maywood Street.) Road improvements associated with Subproject #3B (This includes the improvements south of South Sixth Street along East Main Street, Owen Street, and Shasta Way.) Road improvements associated with Subproject #5. (This improvement addresses the alignment of Crosby Avenue/Maywood Street intersection with the bypass, as well as the improvements required at the Washburn Way/Crosby Avenue intersection.) Table 3 summarizes the cost estimates associated with Project Package #2. Table 3 Estimated Project Cost for Project Package #2 Description Cost Construction Cost Public Facilities On-site Modifications $4,398,000 1 $95,000 Professional Fees $540,000 Property Acquisition Cost $0 Total Estimated Project Cost for Project Package #2 $5,033, This amount excludes the construction costs associated with the water main extension ($304,500) and sanitary sewer sleeves ($16,800).

19 June 2004 Page 18 CONCLUSION Should the City plan to move forward with the findings of this preliminary design report, the project results would form the foundation for the final design phase for both identified project packages.