MN ERFO FS SPERI909 2022-1(1)_Plans_adv (revised01282026).pdf

This document is a comprehensive set of construction plans for the Kimball Creek Road (Route FR-304) Culvert Replacement project (MP 4.285) in the Superior National Forest, Cook County, Minnesota. The project consists of replacing a flood-damaged culvert with a structural plate arch (corrugated aluminum) measuring 25 feet span by 8.5 feet rise by 45 feet length, along with installation of concrete headwalls, wingwalls, and associated roadway and erosion control improvements.

The project scope includes site clearing and grubbing, culvert removal and installation, riprap installation, roadway grading and construction with 14-foot travel way and 6-inch aggregate surface course, embankment construction with 4-inch topsoil and turf establishment, and comprehensive erosion and sediment control measures. Key design specifications reference AASHTO LRFD Bridge Design Specifications (9th Edition, 2020) and Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects (FP-14). The structural design includes live load (HL-93) and dead loads with reinforcing steel (Grade 60) and structural concrete (Class A/AE with 5,000 psi minimum compressive strength). Work restrictions prohibit construction between September 15 and June 30 due to Kimball Creek trout stream restrictions. The plans contain detailed sheets covering typical sections, drainage cross-sections, bridge reinforcement details, erosion control narrative and plans, temporary traffic control, silt fence specifications, filter bag details, slope stabilization with rolled erosion control product (RECP), and sign structures with object markers positioned at the culvert location.