B08_40578109_RFQ_Att1_SOW.pdf

Chickasaw National Recreation Area

Gravel Road and Earthen Dam Maintenance

This project area is within Chickasaw National Recreation Area, Sulphur, OK. 73086

Gravel Road Maintenance:

Site 1: Point/Post Oak Road approximately 42,000 square feet of road surface.

Site 2: Catfish Bottoms Road approximately 190,000 square feet of road surface.

GENERAL

SECTION INCLUDES

A. General requirements regarding gravel roadways and driveways on National Park Service Roads.

B. Photo is not to scale and is for visual information only.

PURPOSE

A. Except for NPS purposes, no new, private, primary, or sole access hard-surface roadways or driveways are allowed

B. Gravel roadways and driveways shall consist of subgrade, base course, and top course.

PRODUCTS

SUBGRADE MATERIAL

A. Imported or native material may be used. Subgrade shall be clean, fine earth, rock, or sand.

B. Material shall be free from: oversized cobbles, rock fragments, sod, rubbish, top soil, grass, roots, brush, or other organic or deleterious materials.

BASE COURSE MATERIAL

A. N/A

TOP COURSE MATERIAL

A. 1.5 inch minus uniform gravel or crushed rock.

EXECUTION

SUBGRADE PREPARATION

A. Keep subgrade free of water, debris, and foreign matter during compaction or proof-rolling.

B. Bring subgrade to proper grade and cross-section and uniformly compact surface.

C. Protect subgrade from traffic.

D. Do not place base course or top course in snow or on soft, muddy, or frozen subgrade.

CONSTRUCTION OF COURSES

A. Base Course N/A

B. Top Course

1. Completed course total thickness:2-inches.

2. Blade lightly and roll surface until material is thoroughly compacted.

3. Crown top course or grade to existing slope of road

ROLLING AND COMPACTION

A. Subgrade material shall be thoroughly compacted using approved compaction equipment.

B. Base course material shall be compacted to a density of 95 percent of maximum density.

C. Top course shall be thoroughly compacted.

D. Commence rolling at outer edges and continue toward center; do not roll center of road first.

E. Apply water as needed to obtain specified compaction requirements.

F. Surface Defects: Remedy by loosening and rerolling. Reroll entire area, including surrounding surface, until thoroughly compacted.

G. Finished surface shall be true to grade and crown.

Inspection:

A. Park must be given 48-hours’ notice prior to inspections of any kind.

CLEANING

A. Remove excess material from the Work area. Clean stockpile and staging areas of all excess aggregate.

Earthen Dam Maintenance:

Site 1: Thedford Pond 1 and 2

Site 2: Buckhorn Pond

CLEARING AND GRUBBING

A. Clear and grub upstream slope of dam and dispose of cleared and grubbed materials. Remove trees and other vegetation, rubbish, and objectionable material as determined by COR on upstream slope of dam.

B. Remove stumps, roots, and vegetative matter.

1. Remove roots to a depth of 5 feet, or until root diameter is less than 3 inches, whichever is encountered first.

DISPOSAL OF CLEARED AND GRUBBED MATERIALS

A. Vegetative materials: Remove from jobsite.

1. Removing from jobsite: Dispose of as combustible material.

GRADING AND PLACING TOPSOIL:

MEASUREMENT AND PAYMENT

A. Placing Topsoil:

1. Measurement: 900 CY of Thedford Pond Dam #1 is regraded and stabilized. 600 CY of Thedford Pond

Dam #2 is regraded and stabilized. 200 CY of Buckhorn Pond Dam is regraded and stabilized. Spillways are regraded and stabilized to ensure proper overflow.

2. Payment: Cubic yard price offered in the schedule.

SUBMITTALS

A. Topsoil plan:

1. Qualifying experience for person responsible for supervision of placing topsoil, for approval.

2. Equipment and placing plans.

B. Topsoil information.

1. Topsoil supplier and source information.

QUALIFICATIONS

A. Provide experienced topsoil placing crew under supervision and direction of individual with minimum of 2 years experience in charge of topsoil placement for topsoil placement similar in nature to that required by this contract.

TOPSOIL

A. Selected materials from commercial source approved by COR.

B. Provide topsoil from area that does not have Johnson grass stands.

1. Area will be inspected by COR prior to approval of topsoil source.

PLACING

A. Scarify surfaces to receive topsoil.

B. Place and spread selected topsoil material on the following areas:

A. Where Bermuda sod will be placed.

B. Finished surfaces of spoil pile.

C. Other areas as directed by COR.

1. Transport and place topsoil to a depth of 6 inches beneath wherever Bermuda sod will be placed.

2. Transport and place topsoil to cover spoil pile to a depth of 6 inches uniformly spread to maximize use of topsoil.

3. Transport and place topsoil to cover staging area to a depth of 6 inches.

4. Light compaction of topsoil as directed by COR is required on all slopes.

5. Minimize equipment travel over placed topsoil.

SODDING

MEASUREMENT AND PAYMENT

A. Sodding:

1. Measurement: Slopping areas or as directed by COR.

2. Payment: Acre price offered in the schedule.

B. SUBMITTALS

Submit the following Sodding Information.

1. Sod supplier and source information.

2. Grass seed mixture, percentage of purity, germination, weed content, and age.

C. SODDING PLAN

1. Qualifying experience for person responsible for supervision of sodding, for approval.

2. Equipment.

3. Maintenance: a. Include sprinkler system irrigation plans, equipment, and materials.

4. Instructions.

a. Supplier’s instructions for recommended sod transport, care, laying, and irrigation.

5. Placement plans.

D. Certification.

1. Supplier’s certification of grass species.

QUALIFICATIONS

A. Provide experienced sod placing crew under supervision and direction of individual with minimum of 2 years experience in charge of sod placement for sod placement similar in nature to that required by this contract.

DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, and handle sod in accordance with supplier’s recommendations.

PROJECT CONDITIONS

A. Bermuda sod may be difficult to place on 2.6:1 downstream slope.

SOD

A. Mixture of cultivated soil, grass, and root material in a furnished rolled mat structure of uniform density obtained from approved commercial source located within State of Oklahoma.

1. Bermudagrass Mulch Sod:

a. Consisting of fertile, loamy textured (less than 70 percent sand) topsoil containing a sufficient quantity of bermudagrass rhizomes of any adapted variety to form a uniform stand of plants on emergence.

b. The rootstock shall be viable and the grass vigorous as indicated by well formed, deeply rooted, thick rootstock.

c. The proportion of soil in the soil-grass mixture shall be sufficient to protect the grass roots from the drying action of the sun after placing, spreading, and compaction.

d. Grass material: Bermuda of the U-3 variety.

B. Free of stones and bare spots.

C. Free of noxious weeds.

D. Free of Johnson grass.

E. Free of fire ants.

F. Materials capable of maintaining growth at jobsite location as recommended by supplier.

G. Contractor shall provide COR access to the source for purpose of inspection prior to approval of source.

ANCHORS

A. Biodegradable stakes as recommended by sod supplier.

B. Length: 6 inches.

IRRIGATION WATER

A. Water obtained from reservoir or other approved source.

PREPARATION

A. Place topsoil on finished downstream embankment surface in accordance with Section 02918 – Placing Topsoil.

B. Scarify or harrow and rake finished topsoil surface to a minimum depth of three inches.

C. Remove stiff clods, lumps, roots, litter, stones, and other foreign material greater than 2 inches in size from surface. Dispose of removed materials outside of park.

D. Fill or smooth finished surface to remove rills, gullies, and depressions.

E. Protect prepared topsoil surface from erosion and washouts. Repair damaged surfaces as required.

F. Where soil moisture cannot be detected by observing, the area to be sodded shall be moistened to a depth of 4 inches before; laying sod.

G. Obtain COR approval of finished surface before laying sod.

SODDING

A. Areas to be sodded:

B. Along finished downstream embankment surface near abutments.

C. Near downstream toe of dam.

D. Lay sod within 24 hours of harvesting.

E. Do not lay sod if grass is dormant or if ground surface is frozen or muddy.

F. Lay sod with long lengths perpendicular to downstream embankment slope.

G. Lay sod to form a solid mass with tightly fitted joints.

H. Butt ends and sides of sod with offset joint edges in adjacent courses.

I. Do not stretch or overlap.

J. Do not damage subgrade or sod during laying operations.

K. Tamp and roll lightly to ensure contact with subgrade. Eliminate air pockets to form a smooth surface.

L. Work sifted soil or fine sand into cracks between adjacent sod courses. Do not overfill.

M. Anchor sod to prevent slippage. Place anchors spaced as recommended by sod supplier.

IRRIGATION

A. Saturate sod with fine water spray within 2 hours of laying.

B. Irrigate entire sodded area with approved sprinkler system.

C. Irrigate a minimum of every other day, or as recommended by the sod supplier for the jobsite area, or as directed by COR.

D. Perform watering as often as necessary and in sufficient quantities to maintain moist soil to a depth of at least 4 inches necessary for the promotion of deep root growth.

E. Perform watering during heat of the day to prevent wilting.

F. Do not oversaturate.

G. Continue to irrigate until sod exhibits established growing condition and as directed by COR to discontinue.

SEEDING AND SOIL SUPPLEMENTS

SUBMITTALS

Submit the following information.

A. Seeding plan:

1. Qualifying experience for person responsible for supervision of seeding, for approval.

2. Equipment.

B. Native Hay information.

1. Native hay supplier and source information.

SITE CONDITIONS

A. Do not seed or fertilize when ambient temperature is below 38 degrees F without approval by COR.

B. Do not seed or fertilize when ground is snow covered.

C. Do not seed, fertilize, or mulch when wind velocities prevent uniform application of materials or would drift materials.

SEED

A. Provided by Government: Buffalo grass seed mix.

FERTILIZER

A. Agricultural grade fertilizer, granular.

1. 40 pounds of actual urea nitrogen in dry granular form.

MULCH

A. Certified Native hay obtained from native grass field not plowed.

B. Obtain from source approved by COR.

C. Free of mold or other evidence of decomposition.

D. Free from weed (non-native to southern Oklahoma) seed.

TOPSOIL SURFACE PREPARATION

A. Areas to be seeded include:

i. Disturbed areas downstream from end of placed sod.

ii. Finished topsoil surface of spoil pile.

iii. Other areas as directed by COR.

B. Complete prior to seeding.

C. Remove stiff clods, lumps, litter, stones, and other foreign material greater than 3 inches in size from the surface. Dispose of removed materials outside of park.

D. Fill or smooth topsoil surface to remove rills, gullies and depressions.

E. Apply fertilizer uniformly at a rate of 40 pounds of content per acre.

F. Protect prepared topsoil surfaces from erosion and washouts. Repair damaged surfaces as required.

SEEDING

A. Native seed applied by drilling seed.

B. Apply Government-furnished native seed mixture at rate of 12-15 pounds per acre or at rate directed by COR.

DRILLING SEED

A. Regulate drill to uniformly distribute seed at approved rate and cover with topsoil depth of 1/4-inch to 1/2-inch.

B. Drill shall be able to handle bulk, fluffy native seed.

C. Apply native seed and native hay mulch separately.

D. Drill crosswise to general slope to safely operate equipment.

MULCHING

A. Spread or blow native hay on areas where seeds were drilled.

i. Spraying is not allowed.

B. Spread within 2 days of drilling seed.

C. Rate: 2 tons of native hay per acre uniformly spread.

D. Anchor with treader.