Attach B general specifications.pdf

ATTACHMENT B

GENERAL ROAD MAINTENANCE SPECIFICATIONS

A. Surface Blading:

1. Description: Surface blading is keeping a native or aggregate roadbed in a condition to facilitate traffic and provide proper drainage. It includes maintaining the crown or slope, shoulder, drainage dips, leadoff ditches, berms and turnouts, and provides a level of smoothness appropriate for the amount and kind of traffic served and consistent with existing surfacing.

2. Specifications:

a. The existing roadbeds, including turnouts, shall be bladed and shaped to reasonably conform to the previous cross section, and to eliminate ruts.

Existing aggregate surfacing shall be bladed to conserve material and to prevent segregation of particle sizes. Rocks or other material remaining on the traveled way surface after final binding which are 4 inches or larger in size shall be removed from the road surface.

b. Roadside cutslopes should not be undercut when cleaning ditches or removing road sloughs. Berms shall be removed from road shoulders, when blading, except where berms are located as part of road design.

c. Cutslopes which have been undercut may require backsloping, seeding and fertilizing.

d. At intersections, the roadbeds at side roads shall be graded for a reasonable distance to assure proper blending of the two driving surfaces.

e. Drainage dips and leadoff ditches shall be cleaned and graded to form their previous line and grade.

f. Crowned, roads should slope towards shoulders at least 2-5% (1/4-1/2 inch per foot road width) on native and gravel roads.

g. At intersections where side roads enter the main road and the entering side road exceeds +3%, shallow ditching across the side road may be required to divert surface runoff and protect the main road's stability.

B. Ditch Cleaning:

1. Description: Ditch cleaning is removing and disposing of all foreign and slough material from roadside ditches to provide an unobstructed waterway conforming reasonably to previous line, grade and cross section.

2. Specifications:

a. Slough material removed from the ditch, if suitable, may be blended into existing native road surface or shoulder. Slough material that is not suitable for blending should be disposed of as directed.

b. Live vegetation and other organic material shall be removed and disposed of as directed.

c. Unstable stumps, rocks, leaning trees or other debris shall be removed from the cutslope as directed.

C Culvert Maintenance:

1. Description: Maintenance is work performed on inlets, outlets, catch basins, related channels, existing riprap, trash racks and any other facilities related to the drainage structure.

2. Specifications: Catch basins, inlets, outlets and energy dissipaters shall be kept functioning and cleaned of debris. Ends of culverts shall be kept straight and undamaged. Any washing alongside or underneath the culvert shall be repaired.

D. Snowplowing:

1. Snow should be windrowed beyond the fill shoulder line.

2. To protect the road surface, a 1-inch to 4-inch cushion of snow may be left on the road.

3. At termination of use, the road will be prepared for spring runoff by opening outlets (drainage) through the plowed berms and a snow berm closure installed.

4. Tracked equipment will not be used to plow snow without prior written approval from the Contract Liaison.

E Corrugated Metal Pipe Installation:

1. All pipes shall be installed with a backhoe or excavator. The exact locations shall be determined and approved by the Contract Liaison after the right-of-way is brushed and cleared.

2. Any excavation trench for culvert installation shall not be wider than necessary to permit satisfactory jointing and thorough tamping of the bedding material under and around the pipe.

3. The bedding surface shall be constructed to provide a firm foundation of uniform density through the entire length of the culvert and shall be slightly cambered along the centerline to correct for expected settlement.

4. Where the bedding surface is not firm at the grade established, all unstable soil under the pipe and for a width of at least one diameter on each side of the pipe shall be removed and replaced with suitable selected material. Rock encountered in the bedding foundation will be removed to at least 1.2 inches below the bottom of the pipe and one diameter on each side. The final bedding area shall consist of fine, compacted granular material.

5. Selected material shall be placed alongside the pipe for backfill in alternating layers not exceeding six inches in depth and thoroughly compacted by a handheld mechanical tamper (whacker packer). Special care must be taken to compact the fill thoroughly under the haunches of the pipe. Whacker packer compaction of backfill must be done for a horizontal distance on each side of the pipe equal to either one pipe diameter or to the outside limits of the trench, whichever is less.

The depth of whacker packer compaction must extend at least to the top of the pipe.

6. Selected native fill material will be free from rocks and hard earth clods larger than 3 inches in size. It should not contain frozen material, sod or a high percentage of organic matter.

7. The remainder of the fill above the top of the pipe may be compacted by tractor or rubber-tired roller. Fill is to extend above each pipe at least one-half the pipe diameter or a minimum of 12 inches, whichever is greater.

8. After being bedded and backfilled, the pipe shall be protected by adequate cover before heavy equipment is permitted to cross during roadway construction.

9. Pipe which is damaged shall be repaired or replaced as directed by the Contract Liaison.

10. The Contract Liaison must be contacted two days before any culvert installation and must be present at any wet site culvert installation.

11. Riprap consisting of angular native rock of graded sizes 6 to 12 inches in diameter shall be installed to armor cuts and fills at both ends of all culverts installed in streams.

12. Energy dissipaters consisting of native rock at least 24 inches in diameter with flat cross section shall be installed below culvert outlets in all perennial streams.

13. All wet site culvert installations require the following:

a. The Contract Liaison and the Contractor shall agree upon a site-specific sediment/erosion control plan for each wet installation prior to any construction. Sediment/erosion control features may include any or all of the following at each site:

a) Straw bales/wattles.

b) Filter Fabric Sediment Traps.

c) Sediment Control Fence.

d) Slash Filter Windrows.

e) Other measures as directed by Contract Liaison.

b. The Contract Liaison and the Contractor shall agree upon a site-specific water diversion plan for each wet installation. Diversions may include: by-pass ditches, plastic lined by-pass ditches, plastic or metal pipe by-passes or other methods as directed the Contract Liaison. Pumping and discharge back into the channel is not permitted.

c. All wet site culvert installations require seeding of all disturbed areas the same day as installation is completed.

d. Any equipment operated within the high-water level of any stream or river channel shall be free of oil and fluid leaks and shall be clean of mud. Said equipment must be inspected by the Contract Liaison and approved prior to any use.

c. Filter fabric sediment traps shall be installed prior to any construction activities on all wet culvert installations.

F. Grass Seeding and Fertilization:

Grass seed and fertilizer will be applied as specified for site specific projects. All grass seed must be certified weed free. Contractor must supply Contract Liaison with all seed labels. Seed and fertilizer shall be applied as follows:

1. Application rates and seed mix: Contract Liaison designate seed mix and application rates prior to application.

2. Fertilizer and seed may be applied with a hand spreader or power blower which adjusts to distribute seed evenly at the specified rate while limiting application to the desired area. Seed and fertilizer shall be applied separately. Mixing of seed and fertilizer is prohibited.

3. Seed and fertilizer shall be applied as directed by the Contract Liaison. In the event weather conditions or time of year are not conducive for successful seed establishment, the Contract Liaison may require a different application schedule from the ones stated.

G. Gravel pits and borrow areas:

1. Contract Liaison will designate all borrow areas and will designate areas within gravel pits to obtain required fill or surfacing material.

2. Contractor will reclaim all borrow or gravel pit areas as directed by the

Contract Liaison.

3. Contractor and Contract Liaison will agree upon equipment used to excavate material and load dump truck(s). I.E. dozer, excavator, backhoe or front-end loader.

H. Gate and Closure Repairs:

1. Contractor may be required to repair or replace gates or guardrail type closures. Contractor will provide all equipment, supplies and workers to complete the job.

2. DNRC may elect to furnish all larger gate parts, such as complete gate assemblies, posts, cross arms, signs, reflectors, locking T's and padlocks.

Contractor will provide all transport for DNRC furnished gate parts.

3. Contractor will supply all smaller repair/installation parts such as nuts, bolts, washers, spray paint, welding rod, etc.

I. Additional Specs and Drawings:

Contract Liaison will provide any additional specifications or drawings not included above when they are necessary to complete a project.

General Scarification and Piling Specifications

All dozer work under the terms of this agreement will be done with a dozer no larger than a D-8 or equivalent (unless otherwise approved) and equipped with:

Approved open type brush rake Roll Over Protective Structure (ROPS) and Falling Object Protective

Structure (FOPS) Grousers Approved, serviceable spark arrester Fire extinguisher (dry chemical type 2.5 pound minimum) Shovel and Pulaski

All excavator work under the terms of this agreement will be done with an excavator no larger than 200 horsepower with a weight of 80,000 pounds (unless otherwise approved) and equipped with:

Bucket and thumb, clamshell, double rake head, or a masticating/grinding head w/thumb

Roll Over Protective Structure (ROPS) and Falling Object Protective Structure (FOPS)

Grousers Approved, serviceable spark arrester Fire extinguisher (dry chemical type 2.5 pound minimum) Shovel and Pulaski

A. On slopes >35% and < 45% an excavator will be required unless otherwise approved by the Contract Liaison. Slopes < 35% does not guarantee that a dozer will be permitted.

B. Equipment used must be washed by the Contractor and inspected by the Contract Liaison prior to commencement of work.

C. Prior to operation, the Contractor and the Contract Liaison will visit the harvest unit to be treated and agree on piling and site-preparation needs.

D. The Contractor will supply qualified equipment operator(s) at all times.

E. The Contract Liaison may temporarily suspend operations under weather conditions unsuitable for continuing work; the period of such suspension shall not be deemed a breach of the terms of this Agreement.

F. The Contractor will leave the specified amount of tons per acre of slash that is 3 inches or larger in diameter.

G. All piles will be clean, 6 feet or greater in height and compacted with piling equipment to a sufficient degree to allow complete burning.

H. Piles will not be constructed within 20 feet of residual trees or beneath any portion of the crown of a residual tree. If spacing of residual trees makes this impractical, piles will be constructed in the largest openings available.

I. Where site preparation is specified by the Contract Liaison, the Contractor will expose bare mineral soil on the specified percent of the area.

J. Operations will be conducted only under relatively dry soil-moisture conditions (20% or less soil moisture).

K. The Contractor will scrupulously avoid damaging residual trees and displacing soil during piling operations.

L. The Contractor shall repair all existing facilities, such as, but not limited to, roads, erosion dips, barriers, drainage facilities, and fences, if damaged or removed by the Contractor.

M. The Contractor will not operate equipment in or across live streams, stream channels, or within Streamside Management Zones (SMZs).

N. The Contractor will leave standing all broken trees that are greater than 8 inches dbh.

O. Patches of regeneration and un-harvested timber within unit boundaries will be left, except as directed by the Contract Liaison.

P. Poorly formed and logging damaged sub-merchantable trees will be piled or scattered as directed by the Contract Liaison.

Landing piles that have been burned will be re-piled at the discretion of the Contract Liaison.