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Reed Hollinshead
ITD Office of Communication
(208) 334-8881

Southwest Idaho highway construction report for Dec. 7-14

BOISE - The following projects in southwest Idaho are now under way.

BOISE - Idaho 16 Extension, Boise River Crossing

Work is under way for the first phase of the extension of Idaho 16, which will be complete in August 2014.

Crews will connect State Street (Idaho 44) to Chinden Boulevard, including a new bridge over the Boise River.

The contractor is continuing to construct the 10 piers and pier caps for the bridge. They are also placing and compacting granular borrow for the roadway base between Idaho 44 and the north abutment of the new bridge.

Knife River is installing pipe culverts and irrigation pipe and structures. They are also mining the granular borrow material for the roadway. Girders are tentatively scheduled to be placed between Piers 4 and 5 and between Piers 5 and 6 (these are the two spans over the main channel of the Boise River) during the week before Christmas.

Concrete Placing Co. Inc., of Boise, is the contractor on this $19.4 million project.

BOISE - Idaho 16 Extension, Phyllis Canal Bridge and South Segment

This project extends Idaho 16 from U.S. 20/26 (at McDermott Road) to Joplin Road, where it ties in to the new Idaho 16 Boise River Bridge project.

The contractor is continuing work on the abutments and wing walls for the Phyllis Canal Bridge. Nampa Paving is continuing to place embankment material in the roadway base to elevate it to the Phyllis Canal Bridge. They are also continuing to prepare the base for the three box culverts on the Eureka Canal for Joplin Court Road. Knife River is working on irrigation pipe installations between Joplin Road and U.S. 20/26. 

Clearing and grubbing should begin this week in preparation of construction of the roadway bases for future local roads necessary to provide access to U.S. 20/26 to local residents. Construction of the Idaho 16 mainline will require closures of parts of Joplin Road and Pollard Lane in the future.

Substantial Completion is expected in December 2013, with overall completion in August 2014.

Concrete Placing Co Inc. is the contractor on this $10.8 million project.

MERIDIAN - Eagle Road resurfacing and medians

Work is wrapping up on this project, which is resurfacing Idaho 55 from Fairview Avenue in Meridian to State Street in Eagle, and installing raised medians from Franklin to Oakhampton Drive, one-half mile north of Chinden Boulevard. Crews began the work in early summer.

Over the next couple of weeks crews will:
·      Pave and restripe the Eagle Road and Chinden Boulevard intersection
·      Complete pedestrian sidewalk ramps
·      Install roadway signs

Crews are working at night from 9 p.m. to 5 a.m. on weekdays and 8 a.m. on weekends. Work is weather-dependent and the schedule may change.

Construction is scheduled to be completed in late December.

Idaho Sand & Gravel Co., of Nampa, is the contractor on this $4.7 million project.

State St./Linder Rd./Ballantyne Lane intersection work

The project will ultimately reconstruct the intersection of Idaho 44 and Linder, including the reconstruction and expansion of Idaho 44 between Linder and Ballantyne and the rebuilding of Linder in the vicinity of Idaho 44.

Ongoing construction is temporarily widening the south side of Idaho 44. The project is about two-thirds of the way designed.

Central Paving, of Boise, is the contractor on this $9.23 million project.

Replacement of Dynamic Message Signs

In this project, DMS signs are being replaced in several locations, primarily on Idaho 21. The work involves removing the existing message signs and controller cabinets and replacing them with upgraded signs and cabinets at their current locations. The sign locations are on Idaho 21 at the junction to Warm Springs, Idaho City, Lowman, and Stanley. And on the Banks to Lowman Highway at Banks, and Idaho 55 near the Shadow Valley Golf Course.

Work is suspended until late December or early January.

Quality Electric Inc., of Boise, is the contractor on this $321,000 project. The work, which is not impacting traffic, is expected to finish by January 2013.

Idaho 21 resurfacing to Lowman

A resurfacing project covering 20.4 miles of Idaho 21 in Boise County is wrapping up for this construction season. The project has been suspended for the winter. Work will resume after June 15, when temperatures required for the remaining resurfacing work are consistently hot enough.

The project runs from Mores Creek Summit to Clear Creek Bridge below Lowman, adding a Stress-Absorbing Fiberglass Layer with Emulsified Asphalt (SAFLEA) on two adjoining sections of Idaho 21 (milepost 52.3 to 60 and 60 to 72.7), conducting slope stabilization, and upgrading guardrail at existing locations.

A SAFLEA treatment is a seal coat with a coating of chopped glass fibers between the oil and gravel aggregates to enhance durability and reduce cracking.

Knife River Corp, of Boise, is the contractor on this $3.9 million project.

CASCADE – Bridge Replacement

A replacement of the North Fork Payette River Bridge in downtown Cascade is now under way. The bridge work will extend into summer 2013.

This project will replace the old, narrow, width-restricted bridge built in 1933 with one more than twice as wide. The existing bridge is 24 feet wide, and will be replaced with a 60-foot wide, 393-foot long, three-span bridge. The new bridge will have two 12-foot lanes, two 11-foot shoulders and a 14-foot median.

In addition, a paved extension will be built to the dirt shared-use path under the bridge on the north side of the river that provides access from both sides of the bridge to the new riverside park.

In the first stage, two-thirds of the new bridge will be built to the west of the existing structure. Traffic will be maintained on the existing bridge through this first stage of bridge work, and then will be routed to the new section of bridge for the remaining work as the old bridge is demolished. There will be traffic interruptions while the new roadway section leading to the new bridge is built.

The contractor completed setting girders on Phase 1 of the new bridge on Tuesday (Dec. 4). Work will continue on various bridge items for the next week. Little or no traffic disruption is expected.

From Monday through Thursday, work that limits drivers to one lane in each direction is only allowed between 9 a.m. and 4 p.m. Two lanes will be maintained between noon Friday and noon Monday. A river safety and navigation plan will be in place for recreationists that use this section of the river.

Wadsworth Brothers Construction Co. Inc., of Draper, Utah, is the contractor on this $4.83 million project.


Highway construction is one of the key forces pushing Idaho toward continued economic vitality by creating jobs, improving safety and reducing traffic congestion.