NM FTFS 233(1) Tularosa AOP Improvements

Road improvements include replacement of the existing concrete low water crossing and apron, which has been undercut by stream erosion. The replacement low flow channel of the crossing structure will be comprised of articulated concrete blocks. In addition, the channel downstream of the low water crossing would be reconstructed to accommodate Aquatic Organism Passage (AOP) and prevent further erosion and sedimentation during flood events. The stream will be reconstructed with engineered glide and riffle structures composed of gravels, cobbles, and riprap which mimic the natural stream channel, in an effort to provide a consistent and stable channel slope. Several log spanner jam structures will be constructed at critical locations to prevent erosion of the channel banks during flood events. The spanner jams are comprised of a matrix of root wads, logs, and natural soils. Stream diversions will be required during construction of the low water crossing and reconstruction of the streambed channel. It is anticipated that pump around diversions will be the most effective, while also having the least effect on the surrounding environment. The base flow rate in the Tularosa River at this location is approximately 3.0 cubic feet per second (cfs). The road is aggregate surfaced on either side of the low water crossing. The road provides access to grazing allotments and a fire lookout tower. Traffic volumes along the route are very low with approximately 30 vehicles per day using the road. It is anticipated the road will be closed during construction; however, emergency, and administrative access will still need to be provided by the contractor.

Division 01 -	General Requirements, Vehicular Access and Parking, Traffic Control, Temporary Barriers and Enclosures.
Division 32 -	Exterior Improvements, Flexible Paving, Asphalt Paving, Rigid Paving, Concrete Paving, Paving Specialties, Pavement Markings.
Division 33 -	Utilities, Storm Drainage Utilities, Storm Drainage Structures.