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

Southwest Idaho highway construction report for Oct. 5-12

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

BOISE - Idaho 16 Extension over Boise River

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 to Chinden Boulevard, including a new bridge over the Boise River.

About one-quarter of the 650 piles have been driven for the 10 piers and pair of abutments. Crews also prepared for pile driving on the south side of the river, placed concrete for pier columns and footings north of the river, and began construction of the retaining wall at Abutment 2 north of the river.

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

BOISE - Idaho 16, 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 working on the second of two building demolitions in the contract. Crews are currently mining and processing material at their source to import for embankment construction. Clearing is slated to begin next week south of the existing Joplin Road off of Pollard Drive.

Almost all work will be restricted to daylight hours, with the exception of activities like hauling bridge girders. 

The overall completion date is in August 2014.

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

MERIDIAN - Eagle Road resurfacing and medians

Work has been under way since early June 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 will begin work on Phase 3 from Hobble Creek Drive to Idaho 44 on Eagle Road this week. Over the next couple of weeks crews will:
•    Mill the old road surface
•    Remove and replace pedestrian sidewalk ramps
•    Continue to work at the Chinden Boulevard and Eagle Road intersection

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

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

Survey crews and utilities are gathering preliminary data in anticipation of improvements to the Idaho 44/Linder Road intersection.

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. ITD anticipates this project will be completed by fall 2013.

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

Repair of seven bridge decks

The repair and resurfacing of bridge decks on seven bridges from Boise through Mountain Home and to the east is nearing completion.

The contractor has completing all work on the Canyon Creek overpass at milepost 92, 18th Street overpass at milepost 94, Hwy 95 Interchange at U.S. 20, the Oregon Trail Interchange at milepost 99, and Hammett Interchange at milepost 112.

The Mayfield Interchange bridge at milepost 71 on I-84 will be shimmed up, (approximately three-quarters inch) for repair work on the substructure.

Temporary lane closures on I-84 eastbound, early this week, allowed workers to remove outside railing and repair concrete surfaces.

Crews are also doing one of the bridge rehabilitation projects for ITD’s Caldwell office, and the hydro-demolition equipment needed has been used at various other locations statewide, so current scheduling shows an expected completion date of mid-November.

Concrete Placing Co. Inc., of Boise, is the apparent low bidder on the $1.72 million repairs.

Idaho 21 resurfacing to Lowman

A resurfacing project covering 20.4 miles of Idaho 21 in Boise County gets under way Monday (Aug. 6) and will finish in Oct. 2013.

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.

One lane of travel will remain open, with flaggers and pilot cars helping to guide traffic. Crews will work a 7 a.m. to 5 p.m. schedule Monday-Thursday and will work half days on Fridays.  No work is allowed on the weekends.

The contractor continues installing trench drains and replacing culverts. Crews are expected to begin constructing retaining walls soon.

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

I-84 median leveling, Black Canyon to Sand Hollow

The median of Interstate 84 near Sand Hollow, a few miles east of Black Canyon, will be leveled in a project starting Tuesday (Oct. 9). The project is expected to finish by the end of the month.

The speed limit will be reduced to 65 mph weekdays (during the day) between mileposts 13 (Black Canyon) and 17 (Sand Hollow). The inside (left) lanes will be coned off in each direction during the work.

The leveling is a safety improvement to minimize water runoff that created soft-spot hazards in the median.

Irvco Asphalt & Gravel Inc., of Fruitland, is the contractor on this $235,000 work.

I-84 bridge repairs

Traffic impacts are complete for a project rehabilitating bridge decks in the Caldwell area, and only guardrail work remains for the bridge at Black Canyon on Exit 13 on I-84.

Crews completed work on the Centennial Way and Boise River crossings, and on the Exit 27 overpass in Caldwell.

Concrete Placing Co. Inc., of Boise, is the contractor on this $1.42 million project.

Idaho 78 paving and repair

A project to resurface and repair soft spots on Idaho 78 has begun and will last through early November.

Work will begin with milling existing surfaces at each end of the project and adjoining roads. Then, paving will commence westbound from Grand View (milepost 60) heading west eight miles to near the Envirosafe entrance. Work will also take place on Idaho 78 from the junction with Idaho 51 to Hammett (mileposts 83-99).

Paving the highway westward from Grand View to milepost 52 is nearly finished. Work has moved to Browns Creek Road at milepost 93, and crews are working east to Hammett. Paving of approaches is under way from Grand View (milepost 60) west to milepost 52.

Paving operations will alternate daily from the westbound to the eastbound lane. When work leaves an abrupt edge down the center of the roadway overnight, the work area will be posted as “No Passing” with an overnight posted speed of 45 mph.

Typically, paving the next day will be in the adjacent lane, leaving no abrupt edge in the center of the roadway and no restrictions posted overnight.

During actual paving, traffic will be controlled by flaggers and will be escorted through the work area by a pilot car.

Crews are expected to work weekdays from 7 a.m. to 7 p.m.

Central Paving Co., of Boise, is the contractor on this $2.6 million project.

CASCADE – Bridge and Roadwork

A replacement of the North Fork Payette River Bridge in downtown Cascade is now under way, with two miles of pavement resurfacing on Idaho 55 in town wrapping up. The roadwork is expected to finish soon, while the bridge work will extend into summer 2013.

ROADWORK: This work is not yet completely done. Signs still need to be installed and there are punch-list items to finish. The signs are on backorder for about three more weeks.

This portion of the project is suspended until backordered signposts arrive.

C & A Paving, of Boise, is the contractor on this $1.86 million project.

BRIDGE WORK: This one-year project will replace the old (built in 1933), narrow, width-restricted bridge 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 constructed 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.

A 12-foot width is in effect.

Pipe and roadwork continues south of the bridge. The old water and sewer lines have now been abandoned and new installations are up and running. The test pile on Pier 1 was driven Thursday and production piles on the piers will continue next week. Abutment 2 was poured this week and forms stripped. Pier-cap work will commence once production piles are driven. Intermittent lane closures continue. Traffic is directed with flaggers.

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 is 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.