Lassen Headquarters Mapping and Utility Survey
DJ&A completed boundary, topographic, & utility surveys for a 77-acre area of Lassen Volcanic National Park’s headquarters. The site consisted of approximately 50 buildings, most of which were built in the 1930’s. The last full topographic survey of the area was completed in 1940. To facilitate future upgrades to the…
Arches National Park Survey and Mapping
Each year, more than 1.5 million visitors travel to Moab, Utah to experience the natural red arches and pinnacles of Arches National Park. To improve the visitor experience at the Park, the National Park Service plans to construct a new 1700-foot bike path connecting the Arches Visitor Center with an…
Timpanogos Cave Visitor Center and Highland Interagency Center
As a subconsultant, DJ&A provided civil engineering support on a two-part project near the Mount Timpanogos Cave National Monument near American Fork, Utah. In the early nineties, an electrical fire destroyed the visitor center serving the Timpanogos Cave National Monument. The evaluation of a variety of alternatives led to the…
Many Glacier and East Glacier Trailer Replacement Project
The purpose of this project was to replace 10 trailers with permanent housing for seasonal National Park Service (NPS) employees working across Glacier National Park. The existing trailers, installed in the 1970’s, were located in the NPS housing compound at St. Mary in a floodplain and had exceeded their lifespan. …
Cimarron Train Trestle Repair
The Cimarron Narrow Railroad Bridge is a historic steel truss bridge originally constructed in 1891. DJ&A developed a computer model and completed a structural analysis of the historic narrow-gauge bridge to aid in evaluating repair alternatives and developing a long-term maintenance plan for the structure. The project also included developing…
Yellowstone Canyon Village Area Condition Assessments
The Canyon Village Area in Yellowstone National Park is famous for its location near the “Grand Canyon of the Yellowstone,” a deep canyon that the Yellowstone River cuts through. This area of the Park is also home to lodges, campgrounds, and Park Service employee housing. For this project, DJ&A led…
Neversink Trail and Gunnison River Bio-Revetment
The goal of this project was to design a bio-revetment structure along a 100-foot reach of a side channel of the Gunnison River in the Curecanti National Recreation Area. The National Park Service (NPS) desired a structure that would appear as natural as possible and provide habitat for native aquatic…
Anaconda & Logging Creek Bank Stabilization Projects
Stream habitat issues associated with road failures along the Inside North Fork Road had become a recurring issue for Glacier National Park, challenging the Park managers’ ability to both protect aquatic resources and provide reliable access for visitors traveling by vehicle to the Fish Creek Campground. To address these ongoing…