Beaver Lake Dam Rehabilitation at Mark Twain National Forest

Okay, here's a breakdown of the key surveying and staking requirements from the provided text. I'll organize it for clarity, pulling out the specific instructions and tolerances. I'll also highlight areas that seem particularly important for quality control. **I. General Surveying/Staking & Accuracy Requirements** * **Accuracy is Critical:** The document emphasizes the need for accurate surveying and staking *before* starting each work category. This is checked during the preparatory phase meetings. (Section 153.04(f)) * **Table of Tolerances:** (Section 153.04) The document references tolerances in Section 153.04, but the values aren't explicitly listed here. You'd need to refer to that section for specific values for things like alignment, grade, and elevation. **II. Specific Surveying/Staking Related to Pavement Profiling (Section 401)** This is where the most detailed staking/measurement requirements are found: * **Profile Measurement:** * The CO (Contracting Officer) will identify the beginning and ending points of the profile measurements. * Measurements in *both* wheel paths are required. * **Sensor Path Spacing:** 65 - 71 inches (1650 - 1800 millimeters) – *This is a critical tolerance* – the spacing must fall within this range. * The sensor path must be *centered* in the traveled way of the lane. * **Data Collection Interval:** Maximum interval of 2 inches (50 millimeters). *Another critical tolerance.* * **Operating Speed:** The inertial profiler must be operated according to AASHTO R 57 and the manufacturer's recommendations. * **No Filtering:** Data should be collected *without* filtering. Filtering will be applied later in ProVAL. * **Lead-In Distance:** At least 150 feet (45 meters) of lead-in distance is required *after* reaching the testing speed. * **Automatic Start/Stop:** Use the profiler’s automatic start/stop activation when collecting data. * **Excluded Areas:** Specific areas will be excluded from profile measurement. These include: * Cattle guards * Bridges not being overlaid. * Turning lanes, passing lanes, side roads, and ramps less than 1,000 feet (300 meters) in length. * Event markers need to be used to mark the beginning and ending location of excluded areas. * Excluded areas are to be measured with a straightedge according to Subsection 401.16(e). * **Data Submission:** * Data is to be exported in "pavement profile format (ppf)." * Specific file naming conventions are required. **III. General Construction Staking & Alignment** * **Preparatory Phase Meetings:** These are to be held before starting *each* work category to review plans, accuracy of surveying/staking, and other requirements. (Section 153.04(a)) * **Conduit Installation:** While not strictly "staking", precise alignment is implied for conduit runs. (Section 636.05) **IV. Quality Control & Verification** * **Review of Surveying/Staking:** The accuracy of the surveying and staking is to be verified during the preparatory phase meetings. (Section 153.04(f)) * **Inspection & Acceptance:** All work is subject to inspection and acceptance by the Contracting Officer. (General theme throughout). **Key Takeaways & Areas to Focus On:** * **AASHTO Standards:** The document frequently references AASHTO standards (R 56, R 57). Ensure compliance with these standards for all measurements and procedures. * **Data Collection Intervals & Tolerances:** Pay very close attention to the specific tolerances for sensor path spacing and data collection intervals during pavement profiling. These are critical for accurate measurements. * **Documentation:** Thoroughly document all surveying and staking procedures, measurements, and any adjustments made. * **Communication:** Maintain clear communication with the Contracting Officer throughout the process to ensure that all work meets their requirements. Let me know if you'd like me to elaborate on any of these points or if you have any other questions.

Notice ID

cb00fc94db6b4c0cb096f496d9a8afd4

Solicitation Number

12363N25Q4227

NAICS Code

237310

Classification Code

Z2LB