Client: USDA Forest Service -- Portland
Owner: USDA Forest Service -- Portland
Cost of Work: $866, 961

PND’s Seattle office won a term contract with the United States Forest Service. Under that contract, initiated to accomplish a variety of road rehabilitation projects in Willamette National Forest and Mount Hood National Forest, the firm has successfully completed 26 different projects and more than 50 separate work orders throughout Oregon and Washington. Many were complex in nature and completed simultaneously. Work involved erosion control systems and culvert replacements; the most complex repair included the design of a geogrid-reinforced embankment with a geotextile-wrapped face. Projects also involved preparing contract specifications and construction cost estimates.

Detailed examples of projects completed under this contract include:

• Road rehabilitation in Mt. Hood National Forest in Estacada, Oregon. This project included reconstruction and repair work on several different roads, and/or road reconditioning and/or realignment. PND engineers designed several pipe arches with hydrological analysis and riprap embankments to repair landslides. Contract specifications and construction cost estimates were prepared. In addition, the Clackamas River Fish Passages were completed in Mt. Hood National Forest. PND provided designs on seven projects in the Mt. Hood National Forest, two of which involved fish passages. One of these projects involved the design of fish passages to re-create fish habitat for spawning in a channel cut off from the Clackamas River by a highway. Two 6-foot diameter pipe arches were used to divert water from the river into the new channel. PND also prepared PS&E designs for fish passage structures including pipe arches with baffles and designed stream modifications to promote fish passage. In addition, we designed structures to minimize potential for debris clogging and failure through use of concrete structures with high-pile debris deflectors.
  
• Road repairs in Willamette National Forest in Oakridge, Oregon. Repairs were made to over 20 roads in this area at various times during the term of this contract. They included repair of eroded asphalt pavement and embankment, a geotextile-reinforced roadway embankment, replacement of culverts, and a road realignment that included a rock-armored slope. One of the largest projects consisted of a road realignment where a creek-overtopped roadway was repaired with a new culvert with an embankment fill and a vertical sag curve. Projects also involved preparing contract specifications and construction cost estimates. In particular, the Blue River Road Repair entailed realignment of a two-lane asphalt road around an area that had sloughed because of a high water table.