STATEMENT OF WORK DRAFT.pdf

STATEMENT OF WORK

0813 Trail Hardening MUT, Lake Loop Section National Forests and Grasslands in Texas

Sam Houston National Forest July 25, 2025

General

1. The contractor shall supply all material, labor, tools, equipment, supplies, incidentals and supervision to complete the project.

2. The contractor shall be responsible to verify the necessary quantities of materials to be supplied. It is suggested that the contractor visit the project site prior to turning in a proposal.

3. There are no utilities available at the project site.

4. All work shall be done in accordance with this document, the project plans, and the FP-

14.

5. All trash, debris, rags, water bottles and any other assorted refuse that is not material to be incorporated into the work shall be removed daily.

Products

1. Government furnished property: none.

2. Contractor: all

Contractor Coordination

1. Contractor to verify clearance for ground disturbing activity prior to starting work. The Forest Service may issue a Notice to Proceed in part or whole pending specialist review.

2. Some areas may be seasonally or permanently restricted from operation and will be flagged for avoidance.

3. Upon Award the contractor is to present an operating schedule as day zero being receipt of Notice to Proceed.

4. All material stockpile locations are to be approved in advance by the CO.

5. All equipment shall be approved in advance by the CO for areas of operation. Some equipment may be suitable for material handling at stockpile sites but not acceptable for trail operation.

6. All equipment shall be washed and free of any soil, weeds, and seeds and will be inspected by the CO during mobilization.

FOR ALL SITES:

1. Shape entire site for positive drainage.

2. The government will provide staking for the following:

DRAFT

a. Precast concrete planked sections of trail.

b. Drain dips

c. Gravel placement

d. Pipe placement.

3. Seed and fertilize all disturbed soil which is not covered with gravel in accordance with table 1 and table 2.

TABLE 1: SEEDING SEASONS

SEEDING SEASON FROM DATE TO DATE

Season 1 April 1 June 30 Season 2 July 1 September 30 Season 3 October 1 March 31

TABLE 2: SEED AND FERTILIZER RATES

SPECIES MIN %PLS OF

SEED

POUNDS PER ACRE SEEDING

SEASON

Hulled Bermuda 85 10 1 Pensacola Bahia 81 40 1 Common Lespediza 80 25 1

Hulled Bermuda 85 15 2 Pensacola Bahia 81 55 2 Browntop Millet 72 20 2

Unhulled Bermuda 80 15 3 Pensacola Bahia 81 55 3 Crimson Clover 78 25 3 Rye Grass 82 20 3

13-13-13 Fertilizer 500 1,2,3

DEFINITIONS:

Base Course. Material placed on the Subgrade to distribute concentrated wheel loads.

Berm. Curb or dike constructed to prevent Trailway runoff water from discharging onto embankment slope.

Borrow. Select Material taken from designated borrow sites or delivered from commercial sources.

Crown, Inslope, and Outslope. The cross slope of the Traveled Way to aid in drainage and traffic maneuverability.

Culverts. A conduit or passageway under a road, trail, or other obstruction. A culvert differs from a bridge in that it is usually entirely below the elevation of the Traveled Way. Forest Service standard for this project requires 12 GA aluminized (aluminum coated galvanized steel) Corrugated Metal Pipe.

Drainage Dip. A dip in the Traveled Way which intercepts surface runoff and diverts the water off the Traveled Way. A Drainage Dip does not block the movement of traffic.

Drainage Structures. Manufactured structures which control the runoff of water from the trail including Inslope, overside drains, aprons, flumes, downdrains and downpipes.

Lead-off Ditches. A ditch used to transmit water from a Culvert, Drainage Structure or Drainage Dip outlet to the natural drainage area. Also called furrow ditches abbreviated as FD in the Description of Work.

Maintenance Activitiy. Items of work leading to the minor restoration and upkeep of a trail and necessary to sustain the trail's anticipated traffic.

Material. Any substance specified for use in the performance of the work.

Trail. The portion of a trail within the limits of excavation and embankment.

Shoulder. That portion of trail contiguous with Traveled Way for accommodation of stopped vehicles, for emergency use, and lateral support of Base and Surface Course, if any.

Slide. A concentrated deposit of materials from above or on backslope extending onto the Traveled Way or Shoulders, whether caused by mass land movements or accumulated ravelling.

Slough. Material eroded from the backslope which partially or completely blocks the ditch, but does not encroach on the Traveled Way so as to block passage of traffic.

Slump. A localized portion of the trail which has slipped or otherwise become lower than that of the adjacent Trailbed and constitutes a hazard to traffic.

Subgrade. Top surface of Trailbed upon which Base Course or Surface Course is constructed. For trails without Base Course or Surface Course, that portion of Trailbed prepared as the finished wearing surface.

Surface Course. The Material placed on the Base Course or Subgrade to enhance traction, distribute concentrated wheel loads and resist abrasion and the effects of climate. Surface Course may be referred to as surfacing.

Traveled Way. That portion of trail, excluding Shoulders, used for the movement of vehicles.

Turnouts. That portion of the Traveled Way constructed as additional width on single track trails to allow for safe passing of vehicles.

Waterbar. A dip in the Trailbed which intercepts surface runoff and diverts the water off the Trailway. A Waterbar is not designed to be traversable by UTV’s or ATV’s.

ACTIVITY 1020 - SURFACE BLADING (DOZER)

DESCRIPTION

1.1 Surface blading is keeping a native or aggregate surfaced trail in a condition to facilitate traffic and provide proper drainage. It includes maintaining the Crown, Inslope or Outslope of the Traveled Way, Turnouts, and Shoulder; repairing Berms; blending approach trail intersections; and cleaning bridge decks, Drainage Dips, and Lead-off Ditches. This work may be accomplished using a crawler tractor with a dozer blade capable of angling.

REQUIREMENTS

3.1 Surface blading shall be performed before, during, and after contractor’s use as often as necessary to facilitate traffic and proper drainage.

3.2 The surface blading shall preserve the existing cross-section. Ruts, chuckholes and corrugations that affect the smoothness of ride do not have to be removed unless they become excessive or interfere with proper drainage. Surface Course Material which has been displaced to the Shoulders or Turnouts shall be returned to the Traveled Way. The blading operation shall be conducted to conserve surface material and to provide for a thorough mixing of the material being worked.

3.3 On native surfaced trails, material generated from backslope Sloughing, and ditch cleaning may be blended with the Surface Material being worked. On aggregate surfaced trails this material shall not be blended with Surface or Base Course Material unless agreed otherwise.

3.4 Trail backslopes shall not be undercut.

3.5 Drainage Dips and Lead-off Ditches shall be cleaned and maintained to retain the existing line, grade, and cross-section.

3.6 Intersecting trails shall be bladed for a distance of 50 feet to assure blending of the surfaces.

3.7 Rocks or other material remaining on the Traveled Way after the final pass that are 6 inches in diameter or larger shall be removed. The unsuitable material shall be disposed of by sidecasting unless agreed otherwise.

3.8 Material resulting from this activity shall not remain on or in structures, such as Culverts, cattle guards, ditches and Drainage Dips.

3.9 Material resulting from this activity, plus any accumulated debris, shall be removed from bridge decks and the deck drains opened.

ACTIVITY 1040 - SPOT SURFACE COURSE PLACEMENT

1.1 Spot surface course placement includes subgrade preparation, furnishing, spreading and shaping materials in accordance with the Requirements.

2.1 Surface course material will be in accordance with the attached TX-DOT standards. Aggregate products specified in the Description of Work are as follows: OR is Oversized Rock TX-DOT 005-3x5-Hard Stone. ABC is TX-DOT 111-Super Flex Base.

3.1 Subgrade Preparation. Prepare subgrade to receive surface course material at locations as designated on-the-ground by the Forest Service on trails listed below. Prepare the subgrade by shaping the Trailbed to approximately the original cross-section and consistent with adjacent sections.

3.2 Furnish and spread material at spot locations designated on the ground by the Forest Service as listed in the Description of Work. Spot locations may be moved by the Forest Service to accommodate changed conditions.

3.3 Variations. The contractor will be required to furnish weight or volume tickets to the Forest Service for the amount of surface course material placed. Only material in place on the trail can be invoiced. Stockpiles dumped at trailheads are not considered delivered and in place.

ACTIVITY 3010 - DRAINAGE STRUCTURES

1.1 This work consists of maintaining and/or installation/removal of Drainage Structures and related items such as inlet and outlet channels, existing riprap, trash racks, and drop-inlets.

MATERIALS

2.1 All Materials used in the maintenance and/or installation/removal of Drainage Structures shall conform by type and specification to them material in the structure being maintained or as indicated in the Description of Work.

REQUIREMENTS

3.1 Drainage Structures and related items shall be cleared of all foreign material which has been deposited above the bottom of the structure and all vegetative growth which interferes with the water flow. Material removed that cannot be incorporated into maintenance work shall be uniformly placed on fill slopes unless agreed otherwise.

3.2 Perform maintenance to insure the proper functioning of the head walls, aprons, inlet assemblies, riprap, trash racks, and other facilities related to the Drainage Structure.

3.3 Install/remove ditches, drainage dips, rock crossings and/or culverts as follows and as marked on the ground. Installation of structures shall not begin without the presence of a Forest Service representative.

3.4 Drainage Dips are constructed to reverse the grade from prevailing trend of the trail over a length of 15 feet horizontally and 1 foot vertically. The low spot at the reversal of grade marks the beginning of the furrow ditch which should leave the trail at a 30 – 45 degree skew. In the inventory direction of the Description of Work a drainage dip furrow ditch is marked as LA(Left Ahead), RA (Right Ahead), LB(Left Behind), RB (Right Behind) along with an estimated length.

3.4 For all culvert crossings the following specifications apply:

1. Install pipe to countersink inverts 4” below existing channel thalweg.

2. Widen channels as necessary to provide uninhibited ingress and egress of water.

3. Culverts are to be bedded in 6” of clean stone #57.

4. Minimum over dig requirement is half the diameter of the culvert on both sides.

5. Replace fill and compact in lifts no more than 12”

ACTIVITY 4020 - TRAIL MOWING AND CLEARING

1.1 This work includes removal of brush, trees and other vegetative growth from within the Trailway limits.

REQUIREMENTS

3.1 Vegetative matter within the Trailway which impedes vehicular travel or interferes with trail maintenance operations, such as surface blading and ditch and culvert cleaning shall be removed. Downed timber meeting utilization standards shall be cut in appropriate lengths lopped to withing 3’ of the ground and scattered along the trail in locations where the Traveled Way or sight distances will not be impaired.

3.2 Vegetative matter removed from the Trailway shall be uniformly placed on fill slopes unless agreed otherwise

3.3 The trail corridor shall be free of limbs and hanging branches for a total width of 16’ and a height of 14’ above the centerline of the trail. Where turnouts are constructed the total corridor width shall be 22’.

ACTIVITY 4050 - SEEDING

1.1 This work includes ground preparation, furnishing and placing seed, fertilizer, limestone and mulch.

MATERIALS

2.1 Materials will be those required in tables 1 and 2.

REQUIREMENTS

3.1 Place seed, fertilizer and mulch of the types, application rates and time of year as follows and as marked on the ground.

ACTIVITY 6020 - MISCELLANEOUS STRUCTURES

1.1 Maintenance of miscellaneous structures includes cattle guards, gates, and other similar structures that have been previously installed to insure safe and efficient operation of the trail.

MATERIALS

2.1 Any materials needed in the maintenance of miscellaneous structures shall be similar in type and quality to the material in the structure being maintained.

REQUIREMENTS

3.1 Cattle guards. Loose rails shall be welded or bolted back in place. Excess Material carried into the cattle guard shall be removed when drainage is blocked or when it reaches 6 inches from the bottom of the cattle guard frame. Drainage into and from the cattle guard shall be kept open.

3.2 Gates. Gates shall be kept in good repair and made to swing easily. Hinges or latches shall be repaired if not operating properly. Brush and debris shall be removed from within the swinging radius.

3.3 FRP Bridge Decking is to be replaced in kind with 3”x12”x6’ boards treated with 0.8 CCA retention. In Accordance With Use Category 4B.

3.4 FOR ALL CONCRETE PLANKED CROSSINGS IN THE DESCRIPTION, THE

FOLLOWING FP-14 SPECIFICATIONS APPLY:

1. Excerpt 303.06: Asphalt and Aggregate Surface Reconditioning. Repair soft and unstable areas to the full depth of the aggregate surface and according to Subsection

204.07. Scarify to the depth of the aggregate surface or to a depth of 6 inches, whichever is less, and remove surface irregularities. Reshape, finish, and compact the entire aggregate surface according to Subsection 301.05.

2. Excerpt 204.07: Subexcavation. Prevent unsuitable material from becoming mixed with the backfill.

3. Add aggregate products as needed for erosion control and as specified in the Description of Work. OR is Oversized Rock TX-DOT 005-3x5-Hard Stone. ABC is TX-DOT 111- Super Flex Base.

4. Excerpt 301.05: Compaction. Compact each layer full width. Roll from the sides to the center, parallel to the centerline of the trail. Along curbs, headers, walls, and all places not accessible to the roller, compact the material with approved tampers or compactors.

Compaction A. Operating spreading and hauling equipment over the full width of the travel way.

5. Place geo-textile such as US 315 or equal as approved by Contracting Officer. Geo-textile will be placed according to plans. All laps are to be a minimum of 2 feet. All geo textile is to be covered by either riprap or precast concrete planks.

6. Place aggregate base specified above in between precast concrete planks no less than three quarters the depth of the planks.

7. Use any spoil from base excavation to build up the shoulders of the travel way.

8. Cover shoulders with geo-textile to a minimum of 3’ from the edge of the concrete plank edges per typical section.

9. Cover geo-textile on shoulders with rip-rap.

10. In the creek channel:

a. Sub grade, Base, and concrete planks should be in-sloped a minimum of 2% grade so that the low side of the plank is upstream.

b. A minimum of 3’ of geo-textile will extend from the edge of the concrete plank into a ditch to be back filled with rip rap.

c. Top elevation of the center of the concrete planks will finish level with the existing elevation of the creek channel.

11. Refer to drawing below for plank construction details. DRAFT