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30th Street Corridor Development

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Summary

The City of Colorado Springs has begun preliminary design plans for roadway improvements along 30th Street between Fontanero Street and Garden of the Gods Road. This road has been identified as a corridor with needed safety, pavement and drainage improvements that will better facilitate emergency vehicles and provide for an emergency evacuation route. Design elements will include widened shoulders, drainage abatement, slope stability and traffic flow at intersections.

Project Budget and Funding

$1.5 million in design work is funded through the Pike's Peak Rural Transportation Authority (PPRTA) and Public Works Capital Funding.  The City has contracted with FHU Engineering, to design Phase 1 of the project, in the amount of $700,000. Funding for the Construction Phase for safety improvements along this vital corridor will be supplemented with a $7.1 million state grant.

This project scope has changed over time, from its original inception 5 years ago.  Previous designs were shorter in distance and in scope. The current project improvements have been increased to two miles, and aims to accommodate additional necessary improvements along the corridor including drainage abatement and slope stability. To best serve the community and address the issues that exist along corridor, the new design will accommodate current and future needs in an overall corridor plan and environmental clearances.

Alternative Analysis and Design Services

The City has contracted the local engineering firm of Felsburg, Holt & Ullevig (FHU) to provide the design services. A major aspect of the work includes development of a Preferred Alternative for the corridor including some of the following major elements: widened shoulders, storm sewer, water quality, pavement design, intersection design, landslide mitigation, structural design, environmental clearances and ultimately design plans. The Preferred Alternative analysis will consider the ultimate width of 30th Street to accommodate storm water design, water quality, intersection improvements and multi-use shoulders/bike lanes.

The project will also collect data for historic and cultural resources, Tribal lands, wetlands, air quality, wildlife movements, and visual and noise impacts. The transportation design plan will include traffic/safety analysis, integrated multi-use shoulders, access considerations,   and corridor-wide visual concepts for structural walls, gateway features to the Garden of the Gods Park, and other roadway appurtenances.

How to Participate

The City will be working closely with stakeholders and the Community to collect input towards the overall design of these safety and roadway improvements. Public meetings will be scheduled during the preliminary design/Alternatives Analysis phase of the project.  In addition, final designs will be presented during a public open house prior to the start of construction.

Proposed Project Schedule

Public Involvement and Alternative Analysis through Preliminary Design will occur from May 2017 to May 2018.  Final Design and environmental clearances are anticipated by Fall 2019.  Once design of the first segment from the preferred alternative and environmental clearances are complete, construction can begin.

Project Contacts

Robin Allen, P.E.
City Project Manager
roallen@springsgov.com
(719) 385-5407

Steve Murray, P.E.
Consultant Project Manager, FHU
Steve.murray@fhueng.com
(719) 314-1800

Lisa Bachman, APR
Public Involvement, Bachman PR
lisa@bachmanpr.com
(719) 488-5908

Design Elements

The City of Colorado Springs has awarded the 30th Street contract to Felsburg Holt and Ullevig with the goal of the first task order to identify a recommended alternative of the 30th Street Corridor from Fontanero to Garden of the Gods Road. The recommended alternative will consider:

  • Ultimate width of 30th Street to accommodate 6-foot-wide multi-use shoulders
  • Storm sewer design
  • Water quality
  • Side street and intersection improvements

Federal funding will be used, so the recommended alternative will require clearance through the National Environmental Policy Act (NEPA) process. Independent projects will be identified in an implementation plan. The first of the independent projects to be constructed is anticipated to be 30th Street from Fontanero to Mesa Road to construct the recommended pavement width and drainage improvements with a construction start date goal of the summer of 2020.

*The following items are outlined in the Scope of Work, but City Staff and FHU may adjust, add to, or delete some of these task items, as the project progresses and on an as-needed basis.*

1) Aerial and Topographical Survey, and Ownership Mapping

  • Existing utility location survey
  • Geotechnical boring locates
  • Topographical survey
  • Permission to enter
  • Preliminary ownership plans
  • Digital terrain modeling and contour mapping

2) Title Work and Property Oversight

  • Conduct research, including title research for properties within the project corridor
  • Assist in identifying existing utility easements and potential covenants or restrictions upon properties
  • Develop cohesive boundaries
  • Identify existing right of way limits
  • Identify gaps or overlaps in adjacent property boundaries
  • Provide information at public meetings regarding the acquisition of additional right of way or property easements (if needed)
  • Provide right of way cost estimates in support of alternatives analysis

3) Preliminary Geotechnical Investigations and Design

  • Focus on slopes east of 30th Street (Mesa Road to the Garden of the Gods Visitor Center)
  • Identify/mapping existing and potential landslides, slope instabilities and other geohazards
  • Characterize surface water drainage issues contributing to slope instabilities

Preliminary investigations will also determine:

  • Active landslide failure depths and contributing groundwater conditions
  • Field drilling and instrumentations
  • Identify alternative slopes and/or earth retaining systems for mitigating landslides
  • Evaluate cutslope materials and slope stabilization measures
  • Assess general earthwork requirements and materials suitability
  • Identify preliminary constructability issues/requirements for the project

Additionally, field reconnaissance will be performed for the remaining sections of the project to evaluate areas that will require similar attention during Phase 2 of this project:

  • Project research
  • Site reconnaissance
  • Landslide/cutslope subsurface investigations
  • Laboratory testing
  • Preliminary geotechnical analysis
  • Draft geotechnical report
  • Revise and issue “FINAL Phase 1 Geotechnical Report”

4) Preliminary Pavement Investigations and Design Recommendations

  • Pavement/subgrade drilling and sampling
  • Laboratory testing
  • Life-cycle analyses
  • Cost-effective pavement material and structural section design recommendations
  • Pavement recommendations for parking lots, vehicle pullouts, as applicable
  • Procure investigation services
  • Conduct field investigation
  • Evaluate and submit samples for testing
  • Prepare preliminary pavement design
  • Prepare and issue “DRAFT Phase 1 Pavement Report”
  • Prepare and issue “FINAL Phase 1 Pavement Report”

5) Structures Alternatives

  • Identify alternative retaining structures
  • Develop conceptual drawings for anticipated key retaining structures along the entire length of the proposed 30th Street new alignment such as:
    • Rock buttresses
    • Rockeries
    • Soldier pile tie-back walls
    • Ground anchor systems
    • Soil nail walls
    • MSE/GRS walls
    • Other gravity wall systems
    • Reinforced soil systems

6) Public Involvement

  • Public involvement plan
  • Property owner interviews
  • Stakeholder meetings
  • Agency coordination
  • Website updates
  • Tracking/response to inquiries
  • Meeting announcements and news releases
  • Meeting summaries
  • GIS support of public meeting and the NEPA process
  • Two public meetings:
    • Public meeting #1-- input and approval on project issues, project process, and purpose and need for the project. Additional goals may include input and approval on the alternative screening process, range of alternatives and a draft set of screening criteria.
    • Public meeting #2 -- present the full range of alternatives considered, final screening criteria, screening process, and the recommended alternative. Additional goals will be to receive input on visual design elements, materials, colors, view sheds, nodal improvements, and potential gateway elements.

7) Environmental Analysis/ NEPA Documentation

  • Develop purpose and need
  • Air quality assessment/modeling and technical report
  • Geologic resources and soils technical report
  • Water quality technical report
  • Floodplain technical report
  • Wetlands field evaluation/GPS and delineation report
  • Biological resource report (vegetation and noxious weeds field survey/GPS and impact analysis, fish and wildlife field survey/GPS, identify impacts and recommend mitigation measures, threatened and endangered species coordination)
  • Historic properties collection and evaluation
  • Archeology/paleontology and Native American consultation
  • Land use collection/mapping and evaluation summary memo
  • Social and economic resources collection/mapping and evaluation summary memo
  • Environmental justice data collection and analysis and summary memo
  • Right-of-way data collection and summarization
  • Utilities data collection and summarization
  • Section 4(f) (non-historic) inventory, mapping, analysis and alternatives recommendations technical report
  • Section 6(f) inventory, mapping, analysis and alternatives recommendations technical report
  • Technical noise assessment and report
  • Visual resource assessment and technical memo
  • Energy requirements and conservation potential of alternative discussion
  • Hazardous materials initial site assessment
  • NEAP coordination and documentation process

8) Alternatives Analysis

A full range of alternatives will be developed to support the NEPA process along 30th Street from Fontanero Street to the Garden of the Gods Road. 

  • Alternatives are composed of alternative elements including:
    • Typical sections
    • Alignments
    • Intersections
    • Storm water design
    • Trail connections
    • Water quality
    • Gateway features
    • Aesthetic features
  • Screening Criteria Development such as:
    • Safety
    • Mobility
    • Intersection line of sight
    • Access
    • Active transportation
    • Multi-modal
    • Environmental
    • Geotechnical/landslides
    • Private property
    • Implementation
    • Constructability
    • Conformance to long range plans
    • Design standards
  • Develop full range of alternatives, and consider:
    • 30th Street typical section (multi-modal shoulders, drainage, storm sewer design, and outfall locations)
    • Water quality improvements
    • 30th street alignment options
    • Side street intersection improvements
    • Trail connections
    • Water quality
    • Gateway and aesthetic features
    • Landscape concepts
  • Existing Conditions Analysis
  • Preferred Alternative development

9) Roadway Design

  • Base mapping
  • 3D Utility DTM
  • Project specific design criteria
  • Typical section development
  • Horizontal and vertical alignment development
  • Geometry layout
  • Establish earthwork limit and quantities
  • Refine conceptual recommended alternative
  • Prepare preliminary quantities and cost estimates
  • Develop project implementation plan

10) Drainage Engineering

Water Quality Best Management Practices (BMPs) will be developed for the project along with a storm sewer layout for the selected alternative will be developed.

  • Initial water quality BMP screening
  • Storm sewer alternative layout
  • Preliminary drainage memo

11) Traffic, Safety, and Access Control

  • Traffic data collection
  • Existing traffic analysis
  • Signal warrants
  • Travel demand forecasting
  • Operational analysis of intersections
  • Traffic report
  • Safety memo
  • Access control memo and map

12) Landscape Architecture/ Visual Alternatives

  • Visual alternative elements will be developed and evaluated
  • Streetscape and landscape concepts from the edge of roadway to the edge of ROW considering materials, landscaping, art, aesthetics, and potentially lighting
  • Nodal and gateway alternative elements will also be developed and evaluated for alternative development and screening
  • Alternative screening support related to park and private land use implications

13) Structural Design Selection

  • Structural selection memorandum for proposed alternative walls, and proposed alternative bridges (if needed)
  • Prepare bridge and wall square foot unit cost support during alternative analysis (if needed)

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