Projects - Roads and Pathways


Route 103 Road Improvements
 

Parashant National Monument (Grand Canyon),
St. George, UT

Along the 60 mile road from St. George, Utah to the Dellenbaugh cabin site of Grand Canyon-Parashant National Monument, there is a 300-foot section of unimproved road a few miles from the cabins that was in poor condition.  This section of County road did not have the proper drainage and frequently flooded making vehicle passage difficult.  HECO completed Title II design development services in support of road improvements for the Monument.  The basis for the design was developed from discussions between the NPS staff and the HEC team, and topographic survey.  A survey of the project site was taken, including road features, rock formations, trees, shrubs, drainage channels, side access, etc. at a contour interval to adequately characterize and evaluate the site. 

For subsequent design and preparation of construction documents, the project site included approximately 300-foot of unimproved road.  Engineering design / hydrologic analysis for the project were provided.  All designs / analysis were completed in accordance with applicable codes, County standards, and National Park Service Management Policies.  Bid-ready construction drawings were developed at the 75% draft and final submittal phases from approved preliminary design documents and embodied adequate general, landscape, and civil drawings, with details, dimensions, notational information and other data to ensure a complete understanding of all elements of work.


Services Provided by HECO Engineers:

  • Survey
  • Civil Engineering
  • Construction Documents

 


North Crater Flow Trail and Lava Campground

 
Craters of the Moon National Monument,
Arco, Idaho

The existing North Crater Flow trail is a short, 1730 linear feet, interpretive trail which loops around a lava flow area and describes, with wayside exhibits, the volcanic landscape and natural mechanisms which created the flow. The asphalt surfaced trail follows the natural contours of the flow; it had a narrow width, steep grade and excessive cross slope at some locations, which makes it difficult to navigate, especially for the mobility-challenged.  The project removed the rough asphalt surface and replaced it with stained concrete.  The path design will kept at 3 ft clear width plus curbs on both sides, gradients and cross slopes are corrected, passing areas were incorporated at resting bench locations and pika crossings with bottomless culverts will be incorporated.  The existing Lava Campground had 51 camping sites that were constructed in the 1950’s to meet recreational needs at the time.  The needs were cars or pickups and tent camping. 


The sites were small and had cinder surfacing which crushes easily under wheel pressure causing frequent maintenance needs and dust dispersal.  The road way was narrow with tight turning radii.  The project rehabilitated the campground to better serve current visitor’s needs.  Specifically, the road way and turning radii were widened and repaved, campsite parking surfaced with asphalt, additional camp sites designated as accessible with accessible routes provided to a nearby comfort station, pay station and hydrant, additional sites were designated at pull-thru and large vehicle sites.


Services Provided by HECO Engineers:

  • Project Management
  • Survey
  • Civil Engineering
  • Title I Report (Preliminary Engineering)
  • Title II Construction Documents
     


 

Safe Routes to School

New Plymouth, Idaho

The project included improvements to the sidewalk condition on S. Plymouth Avenue, from a distance of approximately 1300 feet.  Sidewalk improvements include removal and replacement of existing full width sidewalks with 10 ft wide sidewalks, ADA compliant pedestrian ramps, installation of a decorative street lighting system supplemented with roadway lighting as per AASHTO standards with underground electrical conduits for power supply.  The project length is approximately 0.25 miles in length and improved the west side of S. Plymouth Ave.  The HECO Team assisted the city with obtaining funding, and design of the project.




Services Provided by HECO Engineers:

  • Project Management
  • Construction Management
  • Survey
  • Civil Engineering
  • Preliminary Engineering
  • Construction Documents


 



 

Eagle Road Underpass Pathway

 Eagle, Idaho

 
This project involved linking three existing pathways on the east and west side of Eagle Road by construction of a pedestrian underpass under Eagle Road.  Project highlights include installation of pavement, landscaping, benches, lighting, and railing along the underpass portion of the pathway.  The project passes through the existing bank and riprap along the north bridge abutment and the pathway was excavated into existing fill material on the north bank of the river while a concrete cut off stem was constructed.  Riprap armament was relocated on the lower sections of the riverbank. 


Approximately 8 feet 4 inches of vertical clearance from the finished pathway surface to the underside of the bridge structure was maintained for bicyclists’ headroom.  The project involved establishing survey control to be utilized for the duration of the project, land surveying to determine existing Eagle Road right-of-way and private property lines, topographic surveying for design of the project; and preparation of right-of-way plans.  No right-of-way acquisition was completed for this project.  Several different types of surveying equipment were utilized to complete the project including: GPS for project control, robotic total station with electronic distance measurement for horizontal survey control and topographic data collection, and automatic levels for vertical control.

 

Services Provided by HECO Engineers:

  • Project Management
  • Construction Management
  • Survey
  • Civil Engineering
  • Preliminary Engineering
  • Construction Documents
     



Transportation Master Plan

New Plymouth, Idaho

This project identified the current conditions of the City of New Plymouth streets and transportation facilities, and future transportation needs and requirements.  The study included developing an inventory of existing facilities and a Geographical Information System (GIS) based street surface rating map, including a database to prioritize improvements.  The road inventory survey included a Global Positioning System (GPS) inventory of current road conditions, a GIS database of the City streets, evaluation of City streets surface condition, and a condition rating for each street.  From this, the City can provide strong justification and support of the selected improvements for the community understanding and funding applications.  The City Public Works department will be able to track needed improvements and the associated costs using the GIS database. 

Additionally, information for annual updates to the roadwork plans will be readily available from the GIS database to match potential funding sources with required and desired improvements.  The scope of study also included studying historical population census data, evaluating the existing transportation system, determining future transportation needs, forecasting traffic on major City streets and providing recommendations for congestion mitigation.  It also identified the future investment projects to be included in the 5 year and 20 year CIP.  The report discusses current road conditions, future transportation system considerations based on the projected traffic volumes, future streets connectivity, bicycle and pedestrian pathway planning, public transportation developments and the future transportation projects for the next 5 and 20 years.  Holladay Engineering has assisted fifteen agencies with completing transportation plans.  All of these plans started by meeting with the appropriate public agencies as well as the general public to determine the specific needs of the each individual community.  Each transportation plan is then “customized”, or modified, to address the local topics of highest priority and needs of the individual local units of government.

Services Provided by HECO Engineers:

  • Condition Assessment
  • Master Planning