ITD Office of Communication
Southwest Idaho highway construction report for March 22-29
BOISE - The following projects in southwest Idaho are now under way.
BOISE - Idaho 16 Extension, river crossing plus road connections (GARVEE)
The next step in the extension of Idaho 16 connecting State Street to Chinden Boulevard is set to begin in several weeks. Nampa-based Idaho Sand and Gravel Company has been named Apparent Low Bidder for the $8.76-million work to connect the highways with the local roads on either end of the project.
Contracts have already been awarded to connect State to Chinden, including a new 1,726-foot bridge over the Boise River. Work has been under way since last May to build a bridge across the Boise River and Phyllis Canal between U.S. 20/26 and Idaho 44.
During the next month, ITD will verify that the Apparent Low Bidder is a properly licensed contractor and possesses a surety bond to protect taxpayers and the department. Once that has been verified, the contractor can schedule work to begin. These improvements will be done in late summer 2014.
Preparation for the GARVEE-funded construction on the connecting roads will begin in early April. Work that would disrupt the flow of irrigation waters will be suspended until the irrigation season has been completed.
GARVEE (Grant Anticipation Revenue Vehicle) bonds allowed the Idaho Transportation Department to advance critical infrastructure improvements in vital corridors throughout the state.
Concrete Placing Co. Inc., of Boise, is the contractor for the first two segments, which total $30.2 million.
Crews placed girders near the new bridge’s north abutment this week, completed backfilling of dirt between the abutment and retaining wall, made preparations for work to occur above the bridge girders, and completed local-road irrigation work.
MERIDIAN - Eagle Road resurfacing and medians
This project resurfaced Idaho 55 from Fairview Avenue in Meridian to State Street in Eagle, and installed raised medians from Franklin to Oakhampton Drive, one-half mile north of Chinden Boulevard.
Crews resumed work recently after a winter shutdown. There’s about one week of work to finish up at the Chinden intersection.
A new signal is being designed that will be added in April at Wainwright Street and Eagle Road.
One of the last items will be to re-stripe Eagle Road in the project area.
Idaho Sand & Gravel Co., of Nampa, is the contractor on this $4.7 million project.
State Street/Linder Road/Ballantyne Lane intersection work
This work is part of the department’s Idaho 44 improvement project from Linder Road to Ballantyne Lane. Over the next several months, crews will be rebuilding the Idaho 44/Linder Road intersection and widening Idaho 44 to five lanes. Construction is expected to be completed by this fall.
The contractor is working on Linder Road, south of the intersection, and on widening the Middleton Mill Canal. Crews are working on the temporary signals, and phase 2 widening, on the north side.
Flaggers will direct traffic through the construction zone from 7 p.m. to 5 a.m. Traffic will be restricted to one lane at various times during the night. Restrictions will be in place Sunday through Thursday for each of the next three weeks.
During the day, construction will be limited to the shoulder and side of the roadway and will not restrict traffic.
Central Paving, of Boise, is the contractor on this $9.23 million project.
ADAMS, WASHINGTON COUNTY
U.S. 95 resurfacing Manns Creek to Alpine Store
Sections of U.S. 95 totaling 31.1 miles, from Manns Creek to Shoepeg Road and Cambridge to the Alpine Store, will be resurfaced in a project this summer to extend the life of the road and improve traction for drivers.
The resurfacing will take place starting in June, from milepost 87.5 to 108.9, and from 113.7 to 123.4. The route travels through Washington and Adams counties. It is expected to finish in late August.
The work is part overlay and part CRABS (Cement Recycled Asphalt Base Stabilization). CRABS is an in-depth resurfacing method. The existing roadway is pulverized down to the gravel base, cement is added to the pulverized material, and finally a new layer of asphalt pavement is placed on top.
More than 6,000 feet of guardrail will be replaced to meet current standards. The project also will include some improvements to bridge decks and the current drainage systems at Monroe Creek (milepost 88.3) on the southern end of the project area and 18 miles farther north at Keithly Creek (milepost 106.5).
Knife River Corp. Northwest, of Boise, is the contractor on this $6 million project.
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, as consistently hot temperatures are required for the remaining resurfacing.
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, which will be added next summer, 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.
Murphy – Idaho 78, Scorpion Creek Bridge
A five-month project to place a bridge over Scorpion Creek on Idaho 78 in Owyhee County is expected to begin in early April. The south side of the bridge will be built first, then the north side.
The new concrete slab bridge will replace three corrugated-metal culverts that run under the roadway at milepost 23. One culvert is completely plugged. The other two culverts are more than halfway filled with sediment from the creek. Water runs over the highway at that location during periods of high water, creating a safety hazard.
The new bridge addresses a safety concern with water spilling over the roadway every time Scorpion Creek floods, which is nearly an annual event. The new bridge, about six miles northwest of Murphy, will accommodate higher water levels. The roadway elevation also will be raised about two feet. The roadway approaches will be reconstructed to match the new height and the wider bridge.
No night or weekend work is anticipated but is not prohibited, if necessary, to finish the project on time.
One lane of traffic will be maintained across the bridge during construction, controlled by a temporary traffic signal. Flaggers will be used when needed.
The existing culverts will be removed as needed to build the new bridge while still allowing for water flow.
CASCADE – Bridge Replacement
A replacement of the North Fork Payette River Bridge in downtown Cascade has begun again after being shut down during the winter. The bridgework will extend into late fall 2013.
This summer also saw resurfacing of the roadway between the bridges in town.
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. The short section under the west half of the new bridge has been graded, but has not yet been paved.
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.
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.
This week, crews continued work on the bridge, as the intermediate diaphragms were poured. Roadwork resumed southwest of the bridge. Next week, road and bridge work continues but no traffic control measures are anticipated.
Wadsworth Brothers Construction Co. Inc., of Draper, Utah, is the contractor on this $4.83 million project.
WEISER – replacement of bridge over Weiser River
The replacement of a 78-year-old bridge over the Weiser River south of Weiser began March 4, with several significant traffic impacts. The work on U.S. 95 is expected to be done by the end of this year.
Traffic is restricted to one lane across the bridge. North- and southbound traffic will alternate across the bridge, controlled by temporary signals at both ends of the structure.
Drivers are reminded to use patience during reconstruction and perhaps consider an alternate route, such as Oregon State Route 201 and the U.S. 95 Spur.
Traffic volume increases on U.S. 95 on weekends, so electronic message boards, both on the side of the highway and overhead on westbound I-84, will be used to alert motorists of bridge restrictions. Crews plan to work Mondays through Fridays, but will be off the highway on weekends and holidays.
The two-lane bridge, one of 99 remaining on the state system built before 1936, will be replaced with a three-lane structure. The existing bridge has 26 feet of drivable width, but the new one will be expanded to 48. An average of 7,300 vehicles use the bridge daily. More than 100 million vehicle trips have been taken across the bridge during its lifetime.
In addition to replacing the aging bridge, crews also will reconstruct more than 500 feet of bridge approaches at the north and south ends.
The existing bridge has a sidewalk and two 13-foot lanes but no shoulders. The new bridge will have two 12-foot lanes and a 12-foot center turn lane. The project features a two-foot buffer next to the decorative bridge railing, a five-foot shoulder and a five-foot sidewalk on the west side. No bike lanes will be included in the project.
This week, crews completed installation of the temporary work bridges and removed much of the south half of the old bridge during the first stage of demolition. Over the next week, crews will continue to remove the remainder of the stage 1 portion of the old bridge.
Braun-Jensen, of Payette, is the prime contractor on the $4.8 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.