Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges

Adopted by the Texas Department of Transportation

September 1, 2024

Copyright 2024 • Texas Department of Transportation • All Rights Reserved

Published in September 2024. This document has been created to further the purposes of §201.053(b)(7) Texas Transportation Code to maximize federal funding for highways, public transportation, and aviation purposes, and to help the Department achieve its performance measures set out in the General Appropriations Act (GAA), H.B. 1, 88th Texas Legislature, Regular Session, 2023. This publication has been filed with the State Publications Clearinghouse in the State Library in accordance with the Texas State Depository Law.

Recycled Paper i

Foreword To purchase a copy of this book, go to the Department’s web page, http://www.txdot.gov, and search “TxDOT specifications” or call the Department’s Support Services Division.

For additional information on specifications or information on Departmental Materials Specifications (DMS), Material Producer Lists (MPL), Test Procedures, Material Inspection Guide, and other materials information, go to http://www.txdot.gov.

OUTLINE OF SPECIFICATIONS

Each specification is outlined by Articles and Sections. The basic Articles required for a specification are:

1. DESCRIPTION

2. MATERIALS

3. EQUIPMENT

4. CONSTRUCTION OR WORK METHODS

5. MEASUREMENT

6. PAYMENT

Some Articles are not used in every Item. Measurement and Payment Articles are combined when the work described is subsidiary to bid items of the Contract.

HIERARCHY OF ORGANIZATIONAL ELEMENTS

Here “XXX” represents the Item number. The hierarchy of organizational elements available below the Item level is as follows.

XXX.1., Article XXX.1.1., Section XXX.1.1.1., Section XXX.1.1.1.1., Section XXX.1.1.1.1.1., Section XXX.1.1.1.1.1.1., Section

The term Section is used for all breaks below the Article.

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Table of Contents

100 ITEMS EARTHWORK AND LANDSCAPE

Item 104 Removing Concrete 162 Sodding for Erosion Control 164 Seeding for Erosion Control 168 Vegetative Watering

300 ITEMS SURFACE COURSES AND PAVEMENTS

Item 316 Seal Coat

400 ITEMS STRUCTURES

Item 400 Excavation and Backfill for Structures 402 Trench Excavation Protection 432 Riprap 464 Reinforced Concrete Pipe 465 Junction Boxes, Manholes, and Inlets 467 Safety End Treatment 476 Jacking, Boring, or Tunneling Pipe or Box 496 Removing Structures

500 ITEMS MISCELLANEOUS CONSTRUCTION

Item 506 Temporary Erosion, Sedimentation, and Environmental Controls

5000 ITEMS SPECIAL SPECIFICATION

Item 5018 Wood Fence

DMS-6100 Epoxies and Adhesives

Material Producer List: Epoxies and Adhesives

2024 Specifications 104

Item 104 Removing Concrete

1. DESCRIPTION

Break, remove, and salvage or dispose of existing hydraulic cement concrete.

2. CONSTRUCTION

Remove existing hydraulic cement concrete from locations shown on the plans. Avoid damaging concrete that will remain in place. Saw-cut and remove the existing concrete to neat lines. Replace any concrete damaged by the Contractor at no expense to the Department. Accept ownership and properly dispose of broken concrete in conformance with federal, state, and local regulations unless otherwise shown on the plans.

3. MEASUREMENT

Removing concrete pavement, floors, porches, patios, riprap, medians, foundations, sidewalks, driveways, and other appurtenances will be measured by the square yard (regardless of thickness) or by the cubic yard of calculated volume, in its original position.

Removing curb, curb and gutter, and concrete traffic barrier will be measured by the foot in its original position. The removal of monolithic concrete curb or dowelled concrete curb will be included in the concrete pavement measurement.

Removing retaining walls will be measured by the square yard along the front face from the top of the wall to the top of the footing.

This is a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal, unless modified by Article 9.2., “Plans Quantity Measurement.” Additional measurements or calculations will be made if adjustments of quantities are required.

4. PAYMENT

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Removing Concrete” of the type specified. This price is full compensation for breaking the concrete; loading, hauling, and salvaging or disposing of the material;

and equipment, labor, tools, and incidentals.

Removing retaining wall footings will not be measured or paid for directly but will be subsidiary to this Item.

2024 Specifications 162

Item 162 Sodding for Erosion Control

1. DESCRIPTION

Provide and install grass sod as shown on the plans or as directed.

2. MATERIALS

Use live, growing grass sod of the type specified on the plans. Use grass sod with a healthy root system and dense matted roots throughout the soil of the sod for a minimum thickness of 1 in. Do not use sod from areas where the grass is thinned out. Keep sod material moist from the time it is dug until it is planted. Grass sod with dried roots is unacceptable.

2.1. Block Sod. Use block, rolled, or solid sod free of noxious weeds, Johnson grass, other grasses, or any matter deleterious to the growth and subsistence of the sod.

2.2. Mulch Sod. Use mulch sod from an approved source, free of noxious weeds, Johnson grass, other grasses, or any matter deleterious to the growth and subsistence of the sod.

2.3. Fertilizer. Furnish fertilizer in accordance with Article 166.2., “Materials.”

2.4. Water. Furnish water in accordance with Article 168.2., “Materials.”

2.5. Mulch. Use straw mulch consisting of oat, wheat, or rice straw or hay mulch of either Bermudagrass or prairie grasses. Use straw or hay mulch free of Johnson grass and other noxious and foreign materials. Keep the mulch dry and do not use molded or rotted material.

2.6. Tacking Methods. Use a tacking agent applied in conformance with the manufacturer’s recommendations or by a crimping method on all straw or hay mulch operations. Use tacking agents as approved or as specified on the plans.

3. CONSTRUCTION

Scarify the area to a depth of 4 in. before placing the sod. Plant the sod specified and mulch, if required, after the area has been completed to lines and grades as shown on the plans. Apply fertilizer uniformly over the entire area in accordance with Article 166.3., “Construction,” and water in accordance with Article 168.3., “Construction.” Plant between the average date of the last freeze in the spring and 6 weeks before the average date for the first freeze in the fall in accordance with the Texas Almanac for the project area.

3.1. Sodding Types.

3.1.1. Spot Sodding. Use only Bermudagrass sod. Create furrows parallel to the roadway, approximately 5 in.

deep and on 18-in. centers. Sod a continuous row not less than 3 in. wide in the two furrows adjacent to the roadway. Place 3-in. squares of sod on 15-in. centers in the remaining furrows. Place sod so that the root system will be completely covered by the soil. Firm all sides of the sod with the soil without covering the sod with soil.

3.1.2. Block Sodding. Place sod over the prepared area. Roll or tamp the sodded area to form a thoroughly compacted, solid mat filling all voids in the sodded area with additional sod. Trim and remove all visible netting and backing materials. Keep sod along edges of curbs, driveways, and walkways trimmed until acceptance.

2024 Specifications 162

3.1.3. Mulch Sodding. Mow sod source to no shorter than 4 in., and rake and remove cuttings. Disk the sod in two directions, cutting the sod to a minimum of 4 in. Excavate the sod material to a depth of no more than 6 in. Keep excavated material moist, or it will be rejected. Distribute the mulch sod uniformly over the area to a depth of 6 in. loose, unless otherwise shown on the plans, and roll using a light roller or other suitable equipment.

Add or reshape the mulch sod to meet the requirements of Section 162.3.2., “Finishing.”

3.2. Finishing. Smooth and shape the area after planting to conform to the desired cross-sections. Spread any excess soil uniformly over adjacent areas or dispose of the excess soil as directed.

3.3. Straw or Hay Mulch. Apply straw or hay mulch for “Spot Sodding” and “Mulch Sodding” uniformly over the area as shown on the plans. Apply straw or hay mulch in accordance with Section 164.3.6., “Straw or Hay Mulching.” Apply tack in accordance with Section 162.2.6., “Tacking Methods.”

4. MEASUREMENT

“Spot Sodding,” “Block Sodding,” and “Straw or Hay Mulch” will be measured by the square yard in its final position. “Mulch Sodding” will be measured by the square yard in its final position or by the cubic yard in vehicles as delivered to the planting site.

5. PAYMENT

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Spot Sodding,” “Block Sodding,” “Straw or Hay Mulch,” or “Mulch Sodding.” This price is full compensation for securing a source, excavation, loading, hauling, placing, rolling, finishing, furnishing materials, equipment, labor, tools, supplies, and incidentals.

Fertilizer will not be paid for directly but will be subsidiary to this Item.

Water for irrigating the sodded area, when specified, will be paid for in accordance with Item 168, “Vegetative Watering.” Water for maintaining and preparing the sod before planting will not be paid for directly but will be subsidiary to this Item.

2024 Specifications 164

Item 164 Seeding for Erosion Control

1. DESCRIPTION

Prepare the surface and provide and distribute temporary or permanent seeding for erosion control as shown on the plans or as directed.

2. MATERIALS

2.1. Seed. Provide seed from the previous season’s crop meeting the requirements of the Texas Seed Law, including the testing and labeling for pure live seed (PLS = Purity × Germination). Furnish seed of the designated species in labeled unopened bags or containers to the Engineer before planting. Use within 12 mo. from the date of the analysis. When Buffalograss is specified, use seed that is treated with potassium nitrate (KNO3) to overcome dormancy.

Use Tables 1–5 to determine the appropriate seeding mix and rates as shown on the plans. Include flower seeding mix in accordance with Table 5 with seeding mix shown in Table 1 and Table 2.

If a grass plant species is not available by the producers, the other grass plant species in the seeding mix will be increased proportionally by the percentage of the missing plant grass species. If a flower plant species is not available by the producers, the other flower species in the seeding mix will be increased proportionally by the percentage of the missing flower species. Substitute species and rates require approval of the Engineer before being incorporated into the seeding mx. The rates listed in the tables are for drill seeding. All other methods of placing seed will require a 25% increase in rate.

Table 1

Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

(lb. PLS per acre) 1 (Paris)

Hooded Windmillgrass (Burnet) White Tridens (Guadalupe) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Sideoats Grama (Haskell) Splitbeard Bluestem (Neches) Sand Dropseed (Taylor) Canada Wildrye (Lavaca) Green Sprangletop (Van Horn)

15% 0.3 20% 0.4 20% 2.0 15% 2.25 05% 0.5 05% 0.5 05% 0.1 10% 2.0 05% 0.2

Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Sand Lovegrass (Mason) Green Sprangletop (Van Horn)

15% 0.3 15% 0.3 20% 2.0 15% 2.25 10% 1.0 10% 0.4 15% 0.6

2 (Fort Worth)

Sideoats Grama (Haskell) Little Bluestem (OK Select) Buffalograss (Texoka) Silver Bluestem (Santiago) Green Sprangletop (Van Horn) Sand Dropseed (Taylor) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 10% 1.0 10% 0.7 10% 1.5 10% 0.4 10% 0.4 10% 0.2 10% 2.0

Sand Dropseed (Taylor) Sideoats Grama (Haskell) Little Bluestem (OK Select) Hairy Grama (Chaparral) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Shortspike Windmillgrass (Welder) Silver Bluestem (Stantiago)

15% 0.3 15% 1.5 15% 1.05 15% 0.6 10% 0.2 10% 0.2 10% 0.2 10% 0.4

Table 1 (continued) Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

(lb. PLS per acre) 3 (Wichita Falls) Sideoats Grama (Haskell)

Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) White Tridens (Guadalupe) Little Bluestem (OK Select) Silver Bluestem (Santiago) Buffalograss (Texoka) Blue Grama (Hachita) Sand Dropseed (Taylor) Canada Wildrye (Lavaca)

15% 1.5 10% 0.4 10% 0.2 10% 0.2 15% 1.05 10% 0.4 10% 1.5 05% 0.2 05% 0.1 10% 2.0

Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Green Sprangletop (Van Horn) Sideoats Grama (Haskell) Little Bluestem (OK Select) Silver Bluestem (Santiago) Hairy Grama (Chaparral) Arizona Cottontop (La Salle) Blue Grama (Hachita)

10% 0.2 15% 0.3 15% 0.6 10% 1.0 10% 0.7 10% 0.4 10% 0.4 10% 0.4 10% 0.4

4 (Amarillo) Sideoats Grama (Haskell) Silver Bluestem (Santiago) Buffalograss (Texoka) Green Sprangletop (Van Horn) Blue Grama (Hachita) Hooded Windmillgrass (Burnet) White Tridens (Guadalupe) Western Wheatgrass (Barton) Canada Wildrye (Lavaca)

15% 1.5 15% 0.6 15% 2.25 10% 0.4 15% 0.6 05% 0.1 10% 0.2 10% 3.0 05% 1.0

Green Sprangletop (Van Horn) Sideoats Grama (Haskell) Sand Dropseed (Taylor) Silver Bluestem (Santiago) Little Bluestem (OK Select) Arizona Cottontop (La Salle) Blue Grama (Hachita) Sand Lovegrass (Mason) Hooded Windmillgrass (Burnet)

15% 0.6 10% 1.0 10% 0.2 10% 0.4 15% 1.05 10% 0.4 10% 0.4 10% 0.3 10% 0.2

5 (Lubbock) Sideoats Grama (Haskell) Blue Grama (Hachita) Silver Bluestem (Santiago) Buffalograss (Texoka) White Tridens (Guadalupe) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Galleta Grass (Viva) Western Wheatgrass (Barton) Canada Wildrye (Lavaca)

15% 1.5 15% 0.6 15% 0.6 10% 1.5 10% 0.2 10% 0.4 05% 0.1 05% 0.3 10% 3.0 05% 1.0

Green Sprangletop (Van Horn) Blue Grama (Hachita) Sideoats Grama (Haskell) Little Bluestem (OK Select) Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Silver Bluestem (Santiago) Arizona Cottontop (La Salle) Sand Lovegrass (Mason)

15% 0.6 15% 0.6 10% 1.0 10% 0.7 10% 0.2 10% 0.2 10% 0.4 10% 0.4 10% 0.3

6 (Odessa) Whiplash Pappusgrass (Permian) Green Sprangletop (Van Horn) Silver Bluestem (Santiago) Sideoats Grama (Brewster) Sand Dropseed (Taylor) Alkali Sacaton (Saltalk) Arizona Cottontop (La Salle) Blue Grama (Hachita) Galleta Grass (Viva)

15% 0.9 10% 0.4 15% 0.6 10% 1.0 10% 0.2 10% 0.2 10% 0.4 10% 0.4 10% 0.6

Sand Dropseed (Taylor) Green Sprangletop (Van Horn) Sideoats Grama (Brewster) Whiplash Pappusgrass (Permian) Hooded Windmillgrass (Burnet) Blue Grama (Hachita) Hairy Grama (Chaparral) Sand Lovegrass (Mason) Little Bluestem (Pastura) Galleta Grass (Viva)

15% 0.3 10% 0.4 15% 1.5 10% 0.6 10% 0.2 10% 0.4 10% 0.4 10% 0.3 05% 0.5 05% 0.3

7 (San Angelo) Sideoats Grama (Brewster) Hooded Windmillgrass (Burnet) Silver Bluestem (Santiago) Sand Dropseed (Taylor) White Tridens (Guadalupe) Whiplash Pappusgrass (Permian) Texas Grama (Atascosa) Green Sprangletop (Van Horn) Little Bluestem (OK Select) Blue Grama (Hachita) Galleta Grass (Viva)

15% 1.5 10% 0.2 10% 0.4 10% 0.2 10% 0.2 15% 0.9 05% 0.5 10% 0.4 05% 0.35 05% 0.2 05% 0.3

Sand Dropseed (Taylor) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Shortspike Windmillgrass (Welder) Hairy Grama (Chaparral) Sand Lovegrass (Mason) Sideoats Grama (Brewster) Little Bluestem (OK Select) Whiplash Pappusgrass (Permian)

15% 0.3 15% 0.6 15% 0.3 10% 0.2 10% 0.4 10% 0.3 10% 1.0 10% 0.7 05% 0.3

Table 1 (continued) Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

(lb. PLS per acre) 8 (Abilene) Sideoats Grama (Haskell)

Hooded Windmillgrass (Burnet) Buffalograss (Texoka) Blue Grama (Hachita) Silver Bluestem (Santiago) White Tridens (Guadalupe) Little Bluestem (OK Select) Green Sprangletop (Van Horn) Whiplash Pappusgrass (Permian) Galleta Grass (Viva)

10% 1.0 10% 0.2 10% 1.5 10% 0.4 10% 0.4 15% 0.2 10% 0.7 10% 0.4 10% 0.6 10% 0.6

Sand Dropseed (Taylor) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Silver Bluestem (Santiago) Little Bluestem (OK Select) Shortspike Windmillgrass (Welder) Hairy Grama (Chaparral) Sand Lovegrass (Mason) Arizona Cottontop (La Salle)

15% 0.3 10% 0.4 15% 0.3 10% 0.4 10% 0.7 10% 0.2 10% 0.4 10% 0.3 10% 0.4

9 (Waco) Sideoats Grama (Haskell) White Tridens (Guadalupe) Hooded Windmillgrass (Burnet) Little Bluestem (OK Select) Buffalograss (Texoka) Halls Panicum (Oso) Silver Bluestem (Santiago) Sand Dropseed (Taylor) Green Sprangletop (Van Horn) Canada Wildrye (Lavaca) Texas Grama (Atascosa)

15% 1.5 15% 0.3 10% 0.2 10% 0.7 10% 1.6 05% 0.1 10% 0.4 05% 0.1 10% 0.4 05% 1.0 05% 0.5

Hooded Windmillgrass (Burnet) Shortspike Windmillgrass (Welder) Hairy Grama (Chaparral) Sand Dropseed (Taylor) Sideoats Grama (Haskell) Little Bluestem (OK Select) Green Sprangletop (Van Horn) Texas Grama (Atascosa) Silver Bluestem (Santiago) Canada Wildrye (Lavaca)

15% 0.3 10% 0.2 10% 0.4 15% 0.3 10% 1.0 10% 0.7 10% 0.4 05% 0.15 10% 0.4 05% 1.0

10 (Tyler)

Sand Dropseed (Taylor) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Green Sprangletop (Van Horn) Sideoats Grama (Haskell) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 05% 0.1 20% 2.0 15% 2.25 10% 1.0 05% 0.2 05% 0.5 10% 2.0

Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Green Sprangletop (Van Horn) Sand Lovegrass (Mason) Red Lovegrass (Duval) Hairy Grama (Chaparral)

15% 0.3 10% 0.2 20% 2.0 15% 2.25 10% 1.0 05% 0.2 10% 0.4 10% 0.2 05% 0.2

11 (Lufkin)

Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Green Sprangletop (Van Horn) Sideoats Grama (Haskell) Splitbeard Bluestem (Neches) Sand Dropseed (Taylor) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 20% 2.0 15% 2.25 05% 0.2 05% 0.5 10% 1.0 05% 0.1 10% 2.0

Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Green Sprangletop (Van Horn) Red Lovegrass (Duval) Sand Lovegrass (Mason) Hairy Grama (Chaparral)

15% 0.3 10% 0.2 20% 2.0 15% 2.25 10% 1.0 05% 0.2 10% 0.2 10% 0.4

12 (Houston)

Hooded Windmillgrass (Mariah) Shortspike Windmillgrass (Welder) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Red Lovegrass (Duval) Halls Panicum (Oso) Splitbeard Bluestem (Neches) Sand Dropseed (Nueces) Canada Wildrye (Lavaca)

10% 0.2 10% 0.2 15% 0.3 15% 1.5 15% 2.25 05% 0.1 10% 0.2 05% 0.5 05% 0.1 10% 2.0

Hooded Windmillgrass (Mariah) Sand Dropseed (Nueces) Shortspike Windmillgrass (Welder) Little Bluestem (Coastal Plains) Red Lovegrass (Duval) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Hairy Grama (Chaparral) Green Sprangletop (Van Horn)

15% 0.3 15% 0.3 10% 0.2 15% 1.5 10% 0.2 15% 2.25 10% 1.0

Table 1 (continued) Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

13 (Yoakum)

Shortspike Windmillgrass (Welder) Halls Panicum (Oso) Plains Bristlegrass (Catarina Blend) Little Bluestem (Coastal Plains) Sideoats Grama (South Texas) Texas Grama (Atascosa) Hooded Windmillgrass (Mariah) Sand Dropseed (Nueces) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 10% 0.2 10% 0.6 15% 1.5 05% 0.75 10% 1.0 05% 0.1 05% 0.1 10% 2.0

Hairy Grama (Chaparral) Hooded Windmillgrass (Mariah) Shortspike Windmillgrass (Welder) Sand Dropseed (Nueces) Little Bluestem (Carrizo) Red Lovegrass (Duval) Slender Grama (Dilley) Plains Bristlegrass (Catarina) Green Sprangletop (Van Horn)

15% 0.6 15% 0.3 10% 0.2 10% 0.2 10% 1.5 10% 0.2 10% 1.0 10% 0.4

14 (Austin)

Sideoats Grama (South Texas) Shortspike Windmillgrass (Welder) Plains Bristlegrass (Catarina Blend) Silver Bluestem (Santiago) Little Bluestem (OK Select) Halls Panicum (Oso) Texas Grama (Atascosa) Canada Wildrye (Lavaca)

20% 0.4 10% 0.2 10% 1.5 10% 0.2 10% 0.6 10% 0.4 10% 0.7 05% 0.1 05% 0.5 10% 2.0

Hairy Grama (Chaparral) Shortspike Windmillgrass (Welder) Hooded Windmillgrass (Burnet) Red Lovegrass (Duval) Sand Dropseed (Nueces) Little Bluestem (Carrizo) Sideoats Grama (South Texas) Silver Bluestem (Santiago) Plains Bristlegrass (Catarina) Arizona Cottontop (La Salle)

15% 0.6 10% 0.2 10% 0.2 10% 0.2 10% 0.2 10% 1.5 10% 1.5 10% 0.4 10% 0.4

15 (San Antonio)

Sideoats Grama (South Texas)

Shortspike Windmillgrass (Welder) Halls Panicum (Oso) Plains Bristlegrass (Catarina Blend) False Rhodes Grass (Kinney) Hooded Windmillgrass (Mariah) Pink Pappusgrass (Maverick) Texas Grama (Atascosa) Multiflower False Rhodes Grass (Hidalgo) Arizona Cottontop (La Salle)

15% 2.25 15% 0.3 10% 0.2 10% 0.2 10% 0.6 05% 0.1 05% 0.1 10% 0.6 05% 0.5 10% 0.2

05% 0.2

Slender Grama (Dilley) Hairy Grama (Chaparral) Shortspike Windmillgrass (Welder) Hooded Windmillgrass (Mariah) Red Lovegrass (Duval) Sand Dropseed (Nueces) Pink Pappusgrass (Maverick) Little Bluestem (Carrizo) Arizona Cottontop (La Salle) Multiflower False Rhodes Grass (Hidalgo) Plains Bristlegrass (Catarina)

15% 1.5 15% 0.6 10% 0.2 10% 0.2 10% 0.2 10% 0.2 05% 0.3 10% 1.5 05% 0.2 05% 0.1

16 (Corpus Christi)

Pink Pappusgrass (Maverick) Halls Panicum (Oso) Plains Bristlegrass (Catarina Blend) White Tridens (Guadalupe) Multiflower Galse Rhodes Grass (Hidalgo) Hooded Windmillgrass (Mariah) Arizona Cottontop (La Salle) Sand Dropseed (Nueces) Sideoats Grama (South Texas) Texas Grama (Atascosa)

15% 0.3 10% 0.6 10% 0.2 10% 0.6 10% 0.2 10% 0.2

10% 0.2 05% 0.2 05% 0.1 10% 1.5 05% 0.5

Slender Grama (Dilley) Hairy Grama (Chaparral) Hooded Windmillgrass (Mariah) Red Lovegrass (Duval) Sand Dropseed (Nueces) Shortspike Windmillgrass (Welder) Pink Pappusgrass (Maverick) Multiflower False Rhodes Grass (Hidalgo) Arizona Cottontop (La Salle) Little Bluestem (Carrizo)

15% 1.5 15% 0.6 10% 0.2 10% 0.2 10% 0.2 10% 0.2 10% 0.6 10% 0.2

05% 0.2 05% 0.75

17 (Bryan)

Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Shortspike Windmillgrass (Welder) Splitbeard Bluestem (Neches) Green Sprangletop (Van Horn) Halls Panicum (Oso) Sand Dropseed (Taylor) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 15% 1.5 15% 2.25 10% 0.2 05% 0.5 05% 0.2 05% 0.1 05% 0.1 10% 2.0

Sand Dropseed (Taylor) Shortspike Windmillgrass (Welder) Little Bluestem (Coastal Plains) Green Sprangletop (Van Horn) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Hooded Windmillgrass (Burnet) Red Lovegrass (Duval) Hairy Grama (Chaparral)

10% 0.2 10% 0.2 15% 1.5 05% 0.2 15% 2.25 10% 1.0 15% 0.3 10% 0.2

Table 1 (continued) Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

18 (Dallas)

Sideoats Grama (Haskell)

White Tridens (Guadalupe) Little Bluestem (OK Select) Buffalograss (Texoka) Silver Bluestem (Santiago) Green Sprangletop (Van Horn) Shortspike Windmillgrass (Welder) Canada Wildrye (Lavaca) Sand Dropseed (Taylor)

15% 1.5 15% 0.3 15% 0.3 15% 1.05 10% 1.5 05% 0.2 05% 0.2 05% 0.1 10% 2.0 05% 0.1

Shortspike Windmillgrass (Welder) Hairy Grama (Chaparral) Sand Dropseed (Taylor) Little Bluestem (OK Select) Sideoats Grama (Haskell) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Sand Lovegrass (Mason) Silver Bluestem (Santiago)

10% 0.2 15% 0.6 10% 0.2 15% 1.05 10% 1.0 10% 0.4 10% 0.2 10% 0.4

19 (Atlanta)

Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Sideoats Grama (Haskell) Splitbeard Bluestem (Neches) Green Sprangletop (Van Horn) Sand Dropseed (Taylor) Canada Wildrye (Lavaca)

15% 0.3 15% 0.3 20% 2.0 15% 2.25 10% 1.0 05% 0.5 05% 0.2 05% 0.1 10% 2.0

Hooded Windmillgrass (Burnet) Sand Dropseed (Taylor) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Sand Lovegrass (Mason) Red Lovegrass (Duval) Hairy Grama (Chaparral)

15% 0.3 10% 0.2 20% 2.0 15% 2.25 10% 1.0 10% 0.4 10% 0.2

20 (Beaumont)

Hooded Windmillgrass (Mariah) Shortspike Windmillgrass (Welder) Little Bluestem (Coastal Plains) Florida Paspalum (Harrison) Red Lovegrass (Duval) Halls Panicum (Oso) Splitbeard Bluestem (Neches) Sand Dropseed (Nueces) Canada Wildrye (Lavaca)

10% 0.2 10% 0.2 15% 0.3 15% 1.5 15% 2.25 05% 0.1 10% 0.2 05% 0.5 05% 0.1 10% 2.0

Hooded Windmillgrass (Mariah) Sand Dropseed (Nueces) Shortspike Windmillgrass (Welder) Little Bluestem (Coastal Plains) Red Lovegrass (Duval) Florida Paspalum (Harrison) Splitbeard Bluestem (Neches) Hairy Grama (Chaparral) Green Sprangletop (Van Horn)

15% 0.3 15% 0.3 10% 0.2 15% 1.5 10% 0.2 15% 2.25 10% 1.0 05% 0.2

21 (Pharr)

Halls Panicum (Oso) White Tridens (Guadalupe) Plains Bristlegrass (Catarina Blend) Pink Pappusgrass (Maverick) Texas Grama (Atascosa) Multiflower False Rhodes Grass (Hidalgo) Hooded Windmillgrass (Mariah) Arizona Cottontop (La Salle) Sand Dropseed (Nueces) Whiplash Pappusgrass (Webb)

10% 0.2 10% 0.2 10% 0.2 10% 0.6 10% 0.6 10% 1.0 05% 0.1

10% 0.2 10% 0.4 05% 0.1 10% 0.6

Slender Grama (Dilley) Hairy Grama (Chaparral) Shortspike Windmillgrass (Welder) Red Lovegrass (Duval) Sand Dropseed (Nueces) Hooded Windmillgrass (Mariah) Pink Pappusgrass (Maverick) Whiplash Pappusgrass (Webb) Multiflower False Rhodes Grass (Hidalgo) Arizona Cottontop (La Salle)

10% 1.0 10% 0.4 10% 0.2 10% 0.2 10% 0.2 10% 0.2 10% 0.6 10% 0.6 10% 0.2

22 (Laredo)

Pink Pappusgrass (Maverick) Halls Panicum (Oso) Plains Bristlegrass (Catarina Blend) White Tridens (Guadalupe) Whiplash Pappusgrass (Webb) Shortspike Windmillgrass (Welder) Texas Grama (Atascosa) False Rhodes Grass (Kinney) Hooded Windmillgrass (Mariah)

15% 2.25 10% 0.6 10% 0.2 10% 0.6 10% 0.2 10% 0.6 05% 0.1 10% 1.0 10% 0.2 10% 0.2

Slender Grama (Dilley) Hairy Grama (Chaparral) Hooded Windmillgrass (Mariah) Red Lovegrass (Duval) Sand Dropseed (Nueces) Pink Pappusgrass (Maverick) Arizona Cottontop (La Salle) Little Bluestem (Carrizo) Sideoats Grama (South Texas) Shortspike Windmillgrass (Welder)

15% 1.5 15% 0.6 10% 0.2 10% 0.2 10% 0.2 10% 0.6 10% 0.4 05% 0.75 10% 1.5 05% 0.1

Table 1 (continued) Permanent Rural Seeding Mix

District Clay Soils

Species, Percent, and Rate

(lb. PLS per acre)

Sandy Soils Species, Percent, and Rate

23 (Brownwood)

White Tridens (Guadalupe) Texas Grama (Atascosa) Little Bluestem (OK Select) Buffalograss (Texoka) Silver Bluestem (Santiago) Shortspike Windmillgrass (Welder) Sand Dropseed (Taylor) Green Sprangletop (Van Horn)

15% 1.5 15% 0.3 15% 0.3 10% 1.0 10% 0.7 10% 1.5 10% 0.4 05% 0.1 05% 0.1 05% 0.2

Green Sprangletop (Van Horn) Sand Dropseed (Taylor) Sideoats Grama (Haskell) Little Bluestem (OK Select) Silver Bluestem (Santiago) Hooded Windmillgrass (Burnet) Shortspike Windmillgrass (Welder) Hairy Grama (Chaparral) Sand Lovegrass (Mason)

15% 0.6 15% 0.3 10% 1.0 15% 1.05 10% 0.4 10% 0.2 10% 0.2 10% 0.4

24 (El Paso)

Green Sprangletop (Van Horn) Sideoats Grama (Brewster) Whiplash Pappusgrass (Permian) Silver Bluestem (Santiago) Blue Grama (Hachita) Galleta Grass (Viva) Alkali Sacaton (Saltalk) Arizona Cottontop (La Salle) Plains Bristlegrass (Catarina Blend) False Rhodes Grass (Kinney)

10% 0.4 10% 1.0 10% 0.6 10% 0.4 10% 0.4 10% 0.6 10% 0.2 10% 0.4 10% 0.4 10% 0.2

Sand Dropseed (Taylor) Sideoats Grama (Brewster) Green Sprangletop (Van Horn) Hooded Windmillgrass (Burnet) Blue Grama (Hachita) Hairy Grama (Chaparral) Spike Dropseed (Potter) Little Bluestem (Pastura) Galleta grass (Viva)

20% 0.4 15% 1.5 15% 0.6 10% 0.2 10% 0.4 05% 0.2 10% 0.1 05% 0.5 10% 0.6

25 (Childress)

Blue Grama (Hachita) Buffalograss (Texoka) Galleta Grass (Viva) Silver Bluestem (Santiago) White Tridens (Guadalupe) Green Sprangletop (Van Horn) Western Wheatgrass (Barton) Canada Wildrye (Lavaca)

15% 1.5 15% 0.3 10% 0.4 10% 1.5 10% 0.6 15% 0.6 10% 0.2 05% 0.2 05% 1.5 05% 1.0

Sideoats Grama (Haskell) Green Sprangletop (Van Horn) Sand Dropseed (Taylor) Hooded Windmillgrass (Burnet) Arizona Cottontop (La Salle) Blue Grama (Hachita) Little Bluestem (OK select) Galleta Grass (Viva) Sand Lovegrass (Mason) Canada Wildrye (Lavaca)

15% 1.5 10% 0.4 10% 0.2 10% 0.2 10% 0.4 10% 0.4 10% 1.0 10% 0.6 05% 0.15 10% 2.0

Table 2

Permanent Urban Seeding Mix

District Clay Soils

Species and Rates

(lb. PLS per acre)

Sandy Soils Species and Rates

1 (Paris)

Green Sprangletop Bermudagrass Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3 5.4

2 (Fort Worth)

Sideoats Grama (El Reno) Bermudagrass Buffalograss (Texoka)

0.3 3.6 2.4 1.6

Green Sprangletop Sideoats Grama (El Reno) Bermudagrass Sand Dropseed (Borden Co.)

0.3 3.6 2.1 0.3

3 (Wichita Falls)

Bermudagrass Buffalograss (Texoka)

0.3 4.5 1.8 1.6

Green Sprangletop Sideoats Grama (El Reno) Bermudagrass Sand Dropseed (Borden Co.)

0.3 3.6 1.8 0.4

4 (Amarillo)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Sideoats Grama (El Reno) Blue Grama (Hachita) Sand Dropseed (Borden Co.)

Buffalograss (Texoka)

0.3 2.7 0.9 0.4 1.6

5 (Lubbock)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Sideoats Grama (El Reno) Blue Grama (Hachita) Sand Dropseed (Borden Co.)

Buffalograss (Texoka)

0.3 2.7 0.9

Table 2 (continued) Permanent Urban Seeding Mix

District Clay Soils

Species and Rates

(lb. PLS per acre)

Sandy Soils Species and Rates

6 (Odessa)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Sideoats Grama (Haskell) Sand Dropseed (Borden Co.)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 2.7 0.4 0.9

7 (San Angelo)

Buffalograss (Texoka)

0.3 7.2 1.6

Green Sprangletop Sideoats Grama (Haskell) Sand Dropseed (Borden Co.)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.2 0.3 0.9

8 (Abilene)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Sand Dropseed (Borden Co.)

Sideoats Grama (Haskell) Blue Grama (Hachita) Buffalograss (Texoka)

0.3 0.3 3.6 0.8

9 (Waco)

Buffalograss (Texoka) Sideoats Grama (Haskell)

0.3 1.8 1.6 4.5

Green Sprangletop Buffalograss (Texoka) Bermudagrass Sand Dropseed (Borden Co.)

0.3 1.6 3.6

10 (Tyler)

Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3

11 (Lufkin)

Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3

12 (Houston)

Bermudagrass

0.3 4.5 2.4

Green Sprangletop Bermudagrass

0.3

13 (Yoakum)

Bermudagrass

0.3 4.5 2.4

Green Sprangletop Bermudagrass

0.3

14 (Austin)

Sideoats Grama (South Texas) Buffalograss (Texoka)

0.3 2.4 3.6 1.6

Green Sprangletop Bermudagrass Buffalograss (Texoka)

0.3 4.8

15 (San Antonio)

Bermudagrass Buffalograss (Texoka)

0.3 3.6 2.4 1.6

Green Sprangletop Bermudagrass Buffalograss (Texoka)

0.3 4.8

16 (Corpus Christi)

Bermudagrass Buffalograss (Texoka)

0.3 3.6 2.4 1.6

Green Sprangletop Bermudagrass Buffalograss (Texoka)

0.3 4.8

17 (Bryan)

Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3

18 (Dallas)

Buffalograss (Texoka) Bermudagrass

0.3 3.6 1.6 2.4

Green Sprangletop Buffalograss (Texoka) Bermudagrass Sand Dropseed (Borden Co.)

0.3 1.6 3.6

19 (Atlanta)

Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3

20 (Beaumont)

Sideoats Grama (Haskell)

0.3 2.4 4.5

Green Sprangletop Bermudagrass

0.3

Table 2 (continued) Permanent Urban Seeding Mix

District Clay Soils

Species and Rates

(lb. PLS per acre)

Sandy Soils Species and Rates

21 (Pharr)

Buffalograss (Texoka) Bermudagrass

0.3 3.6 1.6 2.4

Green Sprangletop Buffalograss (Texoka) Bermudagrass Sand Dropseed (Borden Co.)

0.3 1.6 3.6

22 (Laredo)

Buffalograss (Texoka) Bermudagrass

0.3 4.5 1.6 1.8

Green Sprangletop Buffalograss (Texoka) Bermudagrass Sand Dropseed

0.3 1.6 3.6

23 (Brownwood)

Bermudagrass Blue Grama (Hachita)

0.3 3.6 1.2 0.9

Green Sprangletop Buffalograss (Texoka) Bermudagrass Sand Dropseed (Borden Co.)

0.3 1.6 3.6

24 (El Paso)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Buffalograss (Texoka) Sand Dropseed (Borden Co.)

Blue Grama (Hachita)

0.3 1.6 0.4 1.8

25 (Childress)

Blue Grama (Hachita) Buffalograss (Texoka)

0.3 3.6 1.2 1.6

Green Sprangletop Sand Dropseed (Borden Co.)

Buffalograss (Texoka) Bermudagrass

0.3 0.4

1.8

Table 3

Temporary Cool Seeding Mix

District All Soils

Species and Rates

(lb. PLS per acre)

1 (Paris), 2 (Fort Worth), 3 (Wichita Falls), 4 (Amarillo), 5 (Lubbock), 6 (Odessa), 7 (San Angelo), 8 (Abilene), 18 (Dallas), 19 (Atlanta), 23 (Brownwood), 24 (El Paso), 25 (Childress)

Oats Wheat Little Barley Western Wheatgrass

30.0 30.0 5.0 5.0

9 (Waco), 10 (Tyler), 11 (Lufkin), 12 (Houston), 13 (Yoakum), 14 (Austin), 15 (San Antonio), 16 (Corpus Christi), 17 (Bryan), 20 (Beaumont), 21 (Pharr), 22 (Laredo)

Oats Little Barley

40.0 5.0

Table 4

Temporary Warm Seeding Mix

District All Soils

Species and Rates

All Brownton Millet 20.0

Table 5 Flower Seeding Mix

District All Soils

Species and Rates

(lb. PLS per acre)

1 (Paris), 10 (Tyler), 11 (Lufkin), 12 (Houston), 17 (Bryan), 19 (Atlanta), 20 (Beaumont)

Herbaceous Mimosa (Crockett) Illinois Bundleflower (Sabine) Thickspike Gayfeather (Pineywoods) Purple Prairie Clover (Kaneb) Rio Grange Clammyweed (Zapata)

1.5 1.5 1.5 0.6 2.0

2 (Fort Worth), 3 (Wichita Falls), 4 (Amarillo), 5 (Lubbock), 6 (Odessa), 7 (San Angelo), 8 (Abilene), 9 (Waco), 18 (Dallas), 23 (Brownwood), 25 (Childress)

Engelmann Daisy (Eldorado) Awnless Bushsunflower (Plateau) Partridge Pea Illinois Bundleflower (Sabine) Rio Grande Clammyweed (Zapata)

1.5 1.5 1.5 1.5 2.0

13 (Yoakum), 14 (Austin), 15 (San Antonio), 16 (Corpus Christi, 21 (Pharr), 22 (Laredo), 24 (El Paso)

Indian Blanket (Fuego) Awnless Bushsunflower (Venado) Prostrate Bundleflower (Balli) Orange Zexmenia (Goliad) Rio Grande Clammyweed (Zapata)

1.0 0.4 1.5 0.4 2.0

2.2. Fertilizer. Use fertilizer in accordance with Article 166.2., “Materials.”

2.3. Water. Use water in accordance with Article 168.2, “Materials.”

2.4. Highly Erodible Land (HEL). Add Bermudagrass to the mix shown in Table 1 at 1.0 PLS per acre if shown on the plans.

2.5. Mulch.

2.5.1. Straw or Hay Mulch. Use straw or hay mulch in accordance with Section 162.2.5., “Mulch.”

2.5.2. Hydro Mulch. Use mulches that are on the Approved Products List. Submit one full set of manufacturer’s literature for the selected material. Keep mulch dry until applied. Do not use molded or rotted material.

2.6. Tacking Methods. Use a tacking agent applied in conformance with the manufacturer’s recommendations or by a crimping method on all straw or hay mulch operations. Use tacking agents as approved or as shown on the plans.

3. CONSTRUCTION

Scarify the area to a depth of 4 in. before placing the seed, unless otherwise directed. Use approved equipment to vertically track the seedbed as shown on the plans or as directed. Scarify the seedbed to a depth of 4 in. or mow the area before placement of the permanent seed mix when performing permanent seeding after an established temporary seeding. Plant the seed mix specified and mulch, if required, after the area has been completed to lines and grades as shown on the plans.

Apply fertilizer in accordance with Article 166.3., “Construction.” Grass seed, flower seed, and fertilizer may be distributed simultaneously during dry seeding operations, provided each component is applied at the specified rate. Do not combine fertilizer and seed in the same slurry during hydro mulch seeding operations.

Apply half of the required fertilizer during the temporary seeding operation and the other half during the permanent seeding operation when temporary and permanent seeding are both specified for the same area.

Water the seeded areas at the rates and frequencies as shown on the plans or as directed.

Distribute the seed or seed mixture uniformly over the areas shown on the plans. Provide equipment with an agitator or method to maintain a uniform seed mixture during distribution.

3.1. Planting Season.

3.1.1. Temporary Seed. Plant cool seeding mix September 1–January 31. Plant warm seeding mix February 1–August 30.

3.1.2. Permanent Seed. End planting season for all Districts by May 15. Begin planting season for each District based on the following.

January 15. 1 (Paris), 10 (Tyler), 11 (Lufkin), 12 (Houston), 13 (Yoakum), 15 (San Antonio), 16 (Corpus Christi), 17 (Bryan), 19 (Atlanta), 20 (Beaumont), 21 (Pharr), and 22 (Laredo).

February 1. 2 (Fort Worth), 3 (Wichita Falls), 6 (Odessa), 7 (San Angelo), 8 (Abilene), 9 (Waco), 14 (Austin), 18 (Dallas), 23 (Brownwood), 24 (El Paso), and 25 (Childress).

February 15. 4 (Amarillo) and 5 (Lubbock).

3.2. Broadcast Seeding. Use hand or mechanical distribution or hydro-seeding on top of the soil unless otherwise directed. Apply the mixture to the area to be seeded within 30 min. of placement of components in the equipment when seed and water are to be distributed as a slurry during hydro-seeding. Roll the planted area using a light roller or other suitable equipment. Roll sloped areas along the contour of the slopes.

3.3. Straw or Hay Mulch Seeding. Plant seed in accordance with Section 164.3.2., “Broadcast Seeding.” Apply straw or hay mulch uniformly over the seeded area immediately after planting the seed or seed mixture.

Apply straw or hay mulch in accordance with Section 164.3.6., “Straw or Hay Mulching.” Apply tack in accordance with Section 164.2.6., “Tacking Methods.”

3.4. Hydro Mulch Seeding. Plant seed in accordance with Section 164.3.2, “Broadcast Seeding,” before placing mulch. Apply mulch uniformly over the seeded area immediately after planting the seed or seed mixture at the following rates.

Sandy Soils with Slopes of 3:1 or Less. 2,500 lb. per acre.

Sandy Soils with Slopes Greater than 3:1. 3,000 lb. per acre.

Clay Soils with Slopes of 3:1 or Less. 2,000 lb. per acre.

Clay Soils with Slopes Greater than 3:1. 2,300 lb. per acre.

Mulch rates are based on dry weight of mulch per acre. Mix mulch and water to make a slurry and apply uniformly over the seeded area using suitable equipment.

3.5. Drill Seeding. Plant at a depth of 1/4–1/3 in. using a pasture- or rangeland-type drill unless otherwise directed. Plant seed along the contour of the slopes.

3.6. Straw or Hay Mulching. Apply straw or hay mulch uniformly over the area as shown on the plans. Apply straw mulch at 2–2.5 ton per acre. Apply hay mulch at 1.5–2 ton per acre. Use a tacking method over the mulched area in accordance with Section 164.2.6., “Tacking Methods.”

4. MEASUREMENT

This Item will be measured by the square yard or by the acre.

5. PAYMENT

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Broadcast Seeding (Perm)” of the rural or urban seed mixture and sandy or clay soil specified, “Broadcast Seeding (Temp)” of warm or cool season specified, “Straw or Hay Mulch Seeding (Perm)” of the rural or urban seed mixture and sandy or clay soil specified, “Straw or Hay Mulch Seeding (Temp)” of warm or cool season specified, “Hydro Mulch Seeding (Perm)” of the rural or urban seed mixture and sandy or clay soil specified, “Hyrdro Mulch Seeding (Temp)” of warm or cool season specified, “Drill Seeding (Perm)” of the rural or urban seed mixture and sandy or clay soil specified, “Drill Seeding (Temp)” of warm or cool season specified, and “Straw or Hay Mulching.” This price is full compensation for furnishing materials, seeding mix, flower seeding mix, HEL seeding mix, water for hydro-seeding and hydro-mulching operations, mowing, tacking, labor, equipment, tools, supplies, and incidentals.

Fertilizer will not be paid for directly, but will be subsidiary to this Item.

Water for irrigating the seeded area, when specified, will be paid for under Item 168, “Vegetative Watering.”

2024 Specifications 168

Item 168 Vegetative Watering

1. DESCRIPTION

Provide and distribute water to promote growth of vegetation as directed.

2. MATERIALS

Use water that is clean and free of industrial wastes and other substances harmful to the growth of vegetation.

3. CONSTRUCTION

Apply water when directed. Furnish and operate equipment to distribute water at a uniform and controllable rate. Ensure that watering does not erode soil or plantings. Apply water in the required quantity where shown on the plans or as directed.

4. MEASUREMENT

This Item will be measured by the 1,000 gal. (TGL) of water as applied.

5. PAYMENT

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Vegetative Watering.” This price is full compensation for furnishing and operating watering equipment and measuring devices and for furnishing and applying water, including hauling, equipment, labor, and incidentals.

2024 Specifications 316

Item 316 Seal Coat

1. DESCRIPTION

Construct a surface treatment consisting of one or more applications of a single layer of asphalt material covered with a single layer of aggregate.

2. MATERIALS

Furnish materials of the type and grade shown on the plans in conformance with the following.

2.1. Asphalt. Furnish asphalt materials meeting the requirements of Item 300, “Asphalts, Oils, and Emulsions.”

Furnish Type II or Type III asphalt-rubber (A-R) binder in accordance with Section 300.2.10., “Asphalt- Rubber Binders,” as shown on the plans. Furnish a blend design for approval. Include in the design, at a minimum, the following:

manufacturer and grade of asphalt cement;

manufacturer and grade of crumb rubber;

manufacturer, type, and percentage of extender oil, if used;

test report pertinent to crumb rubber gradation in accordance with Tex-200-F, Part I;

design percentage of crumb rubber versus asphalt content;

blending temperature; and test results pertinent to the properties at reaction times of 60, 90, 240, 360, and 1,440 min. in accordance with Section 300.2.10., “Asphalt-Rubber Binders.”

Furnish a new A-R blend design if the grade or source for any of the components changes.

If a tack coat is specified when using A-R, unless otherwise shown on the plans or approved, furnish CSS-1H, SS-1H, or a performance-grade (PG) binder with a minimum high-temperature grade of PG 58 for tack coat binder. Do not dilute emulsified asphalts at the terminal, in the field, or at any other location before use. If required, verify that emulsified asphalt proposed for use meets the minimum residual asphalt percentage specified in Item 300.

2.2. Aggregate. Furnish aggregate meeting Item 302, “Aggregates for Surface Treatments,” of the type and grade shown on the plans. Unless otherwise shown on the plans, furnish aggregate with a minimum Surface Aggregate Classification B.

2.3. Materials Selections. Furnish asphalt and aggregate as shown on the plans.

3. EQUIPMENT

3.1. Distributor. Furnish a distributor that will apply the asphalt material uniformly at the specified rate or as directed.

3.1.1. Transverse Variable Rate. When a transverse variable rate is shown on the plans, ensure that the nozzles outside the wheel paths will output a predetermined percentage more asphalt material by volume than the nozzles over the wheel paths. Use a dual spray bar distributor as desired to provide for a transverse variable rate.

http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit200.pdf

3.1.2. Agitation for Asphalt-Rubber. If using A-R, furnish a distributor capable of keeping the rubber in uniform suspension and adequately mixing the asphalt, rubber, and any additional additives.

3.1.3. Calibration.

3.1.3.1. Transverse Distribution. Furnish a distributor test report, less than 1 yr. old, when tested in accordance with Tex-922-K, Part III. The Department reserves the right to witness the calibration testing. Notify the Engineer 3 days before calibration testing.

Include the following documentation in the test report:

the serial number of the distributor, a method that identifies the actual nozzle set used in the test, and the fan width of the nozzle set at a 12-in. bar height.

When a transverse variable rate is required, and a single spray bar is to be used, perform the test using the type and grade of asphalt material to be used on the project. The Engineer may verify the transverse rate and distribution at any time. If verification does not meet the requirements, correct deficiencies and furnish a new test report.

3.1.3.2. Tank Volume. Furnish a volumetric calibration and strap stick for the distributor tank in accordance with Tex-922-K, Part I.

Provide documentation of distributor calibration performed no more than 5 yr. before the date first used on the project. The Engineer may verify calibration accuracy in accordance with Tex-922-K, Part II.

3.1.4. Computerized Distributor. When paying for asphalt material by weight, the Engineer may allow use of the computerized distributor display to verify application rates. Verify application rate accuracy at a frequency acceptable to the Engineer.

3.2. Aggregate Spreader. Use a continuous-feed, self-propelled spreader to apply aggregate uniformly at the specified rate or as directed. If racked-in aggregate is shown on the plans, furnish a second aggregate spreader for the racked-in aggregate to apply aggregate uniformly at the specified rate.

3.3. Rollers. Unless otherwise shown on the plans, furnish light pneumatic-tire rollers in accordance with Item 210, “Rolling.”

3.4. Broom. Furnish rotary, self-propelled brooms.

3.5. Asphalt Storage and Handling Equipment. When the plan or the Engineer allows storage tanks, furnish a thermometer in each tank to indicate the asphalt temperature continuously. Keep equipment clean and free of leaks. Keep asphalt material free of contamination.

3.6. Aggregate Haul Trucks. Unless otherwise approved, use trucks of uniform capacity to deliver the aggregate. Provide documentation showing measurements and calculation in cubic yards. Clearly mark the calibrated level. Truck size may be limited when shown on the plans.

3.7. Digital Distance-Measuring Instrument. Furnish a vehicle with a calibrated digital distance-measuring instrument accurate to ±6 ft. per mile.

4. CONSTRUCTION

4.1. General. Comply with the seal coat season as shown on the plans. Asphalt and aggregate rates shown on the plans are for estimating purposes only. Adjust the rates for existing conditions as directed.

http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/900-K_series/pdfs/cal922.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/900-K_series/pdfs/cal922.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/900-K_series/pdfs/cal922.pdf

4.2. Temporary Aggregate Stockpiles. The Engineer will approve the location of temporary aggregate stockpiles on the right of way before delivery. Place stockpiles in a manner that will not:

obstruct traffic or sight distance, interfere with the access from abutting property, or interfere with roadway drainage.

Locate stockpiles at least 30 ft. from roadway when possible. Sign and barricade as shown on the plans.

4.3. Aggregate Furnished by the Department. When shown on the plans, the Department will furnish aggregate to the Contractor without cost. Stockpile locations are shown on the plans.

4.4. Adverse Weather Conditions. Do not place surface treatments when, in the Engineer’s opinion, general weather conditions are unsuitable. Meet the requirements for air and surface temperature shown below.

4.4.1. Standard Temperature Limitations. Apply seal coat when air temperature is above 50°F and rising. Do not apply seal coat when air temperature is 60°F and falling. In all cases, do not apply seal coat when surface temperature is below 60°F.

4.4.2. Polymer-Modified Asphalt Cement Temperature Limitations. When using materials described in Section 300.2.2., “Polymer-Modified Asphalt Cement,” apply seal coat when air temperature is above 70°F and rising. Do not apply seal coat when air temperature is 80°F and falling. In all cases, do not apply seal coat when surface temperature is below 70°F.

4.4.3. Asphalt-Rubber Temperature Limitations. Do not place hot A-R seal coat when, in the Engineer’s opinion, general weather conditions are unsuitable. Apply seal coat when the air temperature is 80°F and above, or above 70°F and rising. In all cases, do not apply seal coat when surface temperature is below 70°F.

4.4.4. Cool Weather Night Air Temperature. The Engineer reserves the right to review the National Oceanic and Atmospheric Administration (NOAA) weather forecast and determine whether the nightly air temperature is suitable for asphalt placement to prevent aggregate loss.

4.4.5. Cold Weather Application. When asphalt application is allowed outside the above temperature restrictions, the Engineer will approve the binder grade and the air and surface temperatures for asphalt material application. Apply seal coat at air and surface temperatures as directed.

4.5. Mixing Hot A-R Binder. If using A-R, mix in accordance with the approved blend design required in Section 316.2.1., “Asphalt.”

At the end of each shift, provide the Engineer with production documentation that includes the following:

amount and temperature of asphalt cement before addition of rubber, amount of rubber and any extender added, viscosity of each hot A-R batch just before roadway placement, and time of the rubber additions and viscosity tests.

4.6. Surface Preparation. Remove existing raised pavement markers. Repair any damage incurred by removal as directed. Remove dirt, dust, or other harmful material before sealing. When shown on the plans, remove vegetation and blade pavement edges. When directed, apply a tack coat before applying the hot A-R treatment on an existing wearing surface in accordance with Section 341.4.7.2., “Tack Coat.”

4.7. Rock Land and Shot.

4.7.1. Definitions.

Rock Land. The area covered at the aggregate rate directed with one truckload of aggregate.

Shot. The area covered by one distributor load of asphalt material.

4.7.2. Setting Lengths. Calculate the lengths of both rock land and shot. Adjust shot length to be an even multiple of the rock land. Verify that the distributor has enough asphalt material to complete the entire shot length.

Mark shot length before applying asphalt. When directed, mark length of each rock land to verify the aggregate rate.

4.8. Asphalt Placement.

4.8.1. General. The maximum shot width is the width of the current transverse distribution test required under…