The California Department of Transportation (Caltrans), using state funding only, is proposing a paving and drainage facilities repair project in Trinity County on State Route (SR) 3 from post mile (PM) 29.7 to L30.889 (the intersection with SR 299). The purpose of the project is to improve the safety of the traveling public, improve ride quality, increase pavement life expectancy, and increase worker safety by reducing maintenance personnel exposure to traffic. The project is needed because the departure guard rail on SR 3, just south of the intersection of SR 299, is functionally obsolete and requires upgrading to current Caltrans standards. The section of pavement on SR 3 heading south from the SR 299 intersection is in fair condition, exhibiting structural deficiencies that include alligator type (A - B) cracking, longitudinal cracking, and light wheel path rutting. A significant amount of maintenance is required above what is normal for this type of roadway. Existing culverts on SR 3 at PM 29.84, 29.92, 30.07, and 30.31, and an existing culvert on Reading Creek Road that corresponds to PM 29.84 on nearby SR 3 are in poor condition and are recommended to be replaced as part of the project.
The proposed improvements include:
• Replace asphalt-concrete surfacing and overlay the roadway with 0.2-foot of hot mix asphalt (using a Type A pavement strategy) on SR 3 from PM 29.77 to L30.87 conforming to existing paved driveway road connections. Asphalt concrete on SR 3 would be cold planed from PM 29.77 to PM 29.80 and from PM L30.84 to PM L30.87.
• Overlay/pave a portion of the existing gravel/asphalt turnout (approximately 315 feet long by 12-feet wide) on SR 3 from PM 29.78 to PM 29.84.
• Pave a portion of the existing gravel turnout (approximately 260 feet long and 12 feet wide) on SR 3 from PM 30.78 to 30.83.
• A scupper would be installed in the existing bridge railing transition to reduce water ponding on the southbound lane of SR 3 at approximately PM L30.87 during storm events.
• Replace the single-post sign at approximately PM 30.78.
• Replace the two-post sign at approximately PM 30.83.
• Replace (upgrade) approximately 600 linear feet of existing guardrail from metal beam guardrail (MSGR) to current Caltrans Midwest Guardrail System (MGS) standards, including WB type transition and attaching bridge anchor block, on SR 3 from PM 30.75 to the bridge anchor block.
• Extend bridge rail (bridge #05-0018 which spans the Trinity River) approximately 15 linear feet along the southbound lane of SR 3.
• Replace (upgrade) guardrail on the northern approach to the Reading Creek bridge on SR 3. The replacement includes approximately 125 linear feet of MGS guardrail along the southbound lane and approximately 25 linear feet of MGS guardrail along the northbound lane. Anchor blocks would be constructed with Type WB-31 transitions.
• Replace existing culverts on SR 3 at PM 29.84, 29.92, 30.07, and 30.31, and replace an existing culvert on Reading Creek Road that corresponds to PM 29.84 on nearby SR 3. Dimensions of existing and new culverts, method of replacement, and a description of other related culvert work at each location are provided in the table below. Construction access to culverts would be from the pavement or road shoulders. No temporary construction access roads would be needed. No dewatering or water diversions are anticipated.
(TABLE IS OMMITTED)
Construction of the project would disturb less than a half-acre of topsoil. Maximum excavation depths are estimated at approximately 6 feet deep and would be associated with culvert work. Tree removal would be limited to removal of several sapling trees at PM 29.84 and 1 tree at the culvert inlet at PM 30.31. The project would add approximately 0.07 acres of new impervious surface within the project limits.
Construction of the project would require approximately 30 days.
Staging/stockpiling would occur in existing turnouts throughout the project limits.
No disposal or borrow sites would be utilized.
Construction of the project would not add new utilities. However, an underground fiber optic cable near the intersection of SR 3 and SR 299 would need to be permanently relocated to accommodate the extension of bridge rail, placement of anchor blocks, and WB transition/guardrail improvements. Culvert work at PM 25.24 has a utility conflict with the underground fiber optic cable that will be resolved by encasing the cable within conduit, thus protecting it in place. No utility conflicts are anticipated at the other locations where culvert work would occur because the underground fiber optic cable is encased within conduit at these locations.
All work would occur inside Caltrans’ existing right-of-way. No right-of-way would be permanently acquired. Federal land owned by the Bureau of Land Management (BLM) is present within the project limits on SR 3 at PM 29.92, 30.5, and L30.85.