CONSTRUCTION SPECIFICATIONS

SECTION 02010 July 2025

FIELD ENGINEERING

02010 - 1

INDEX

SECTION 02010 - FIELD ENGINEERING

PART 1 - GENERAL

1.1 DESCRIPTION

1.2 REFERENCE SPECIFICATIONS

1.3 QUALITY ASSURANCE

1.4 SUBMITTALS

PART 2 - PRODUCTS

Not Applicable

PART 3 - EXECUTION

3.1 SURFACE CONDITIONS

3.2 DIMENSIONS AND ELEVATIONS

3.3 POSITION, GRADIENT, AND ALIGNMENT

3.4 FINAL PAY QUANTITY SURVEYS

3.5 INTERIM PAY QUANTITY SURVEYS

3.6 STAKE OUTS

3.7 AS-BUILT SURVEY INFORMATION

3.8 RECORD SURVEY NOTES

PART 4 - MEASUREMENT AND PAYMENT

4.1 UNIT PRICES

4.2 SUMMARY—UNITS OF MEASUREMENT

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A. Work Included

Work under this SECTION covers requirements for materials, tools, equipment and services necessary to complete Field Engineering of all work for this project. The work shall include, but is not necessarily limited to, completion of the following:

1. Surveys for acceptance of original ground lines

2. Stake Outs, including location and elevation of all work

3. Interim pay surveys as needed

4. Maintaining record survey notes and record plans (as-built drawings)

5. Final pay quantity surveys, including measurement of all bid items requiring taping or surveys

6. Preservation of the location(s) of land survey monuments, apparent property lines, all existing fencing, and any other features as noted on the plan or in other portions of the specifications

1.2 REFERENCE SPECIFICATIONS

No additional specifications or standards are incorporated into this SECTION

A. Contractor shall use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work of this SECTION.

B. Contractor shall use equipment adequate in size, capacity and numbers to accomplish the work in a timely manner.

C. In addition to complying with requirements of governmental agencies having jurisdiction, Contractor shall comply with the directives of Engineer and Division.

D. Survey work and recording of data shall be in accordance with acceptable standards of practice in engineering and land surveying professions. Survey work shall be done with a licensed professional engineer or a licensed land surveyor in responsible charge, in accordance with provisions of Chapter 542B, Code of Iowa. This requirement is waived for that portion of the work that can be and is surveyed by Contractor’s own personnel. The Contractor may use other competent persons that are trained in using Global Positioning System (GPS) equipment subject to the approval of the Engineer.

1.4 SUBMITTALS

A. Record Plans (As Built Drawings): Specific requirements for record plans are indicated in the General Conditions (Document N, Paragraph 2-05 A) and in 3.7 below.

B. Record Survey Notes: Specific requirements for record survey notes are indicated in the General

Conditions (Document N, Paragraph 2-05 C), and in 1.2 D above.

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C. Survey notes of locations of all monuments, benchmarks, existing fences and any other reference points that will be disturbed as part of construction.

Not Applicable

Contractor shall examine the areas and conditions under which work of this SECTION will be performed and correct conditions detrimental to timely and proper completion of the work. Contractor shall not proceed until unsatisfactory conditions are corrected.

3.2 DIMENSIONS AND ELEVATIONS

Contractor shall verify in the field all dimensions and elevations which are required. Elevations indicated and referred to in the Specifications and on the Plans are based on the bench mark datum indicated on the Plans. Horizontal and vertical control reference points shown on the Plans shall be re-established as necessary by Contractor prior to performing any layout of the work. Contractor shall promptly notify Engineer in case of discrepancies.

3.3 POSITION, GRADIENT, AND ALIGNMENT

A. Competent survey personnel employed and paid by Contractor shall lay out and stake out all control points and reference stakes required for construction of the work. Contractor shall carefully preserve all existing monuments, bench marks, fence locations, and reference points shown on the Plans or encountered during construction. All existing monuments, benchmarks, fence locations and other reference points shall be surveyed prior to commencement of construction in these areas with the survey notes provided to Engineer. When necessary or requested, Contractor shall repair or replace damaged reference points at no cost to Division.

B. All work performed under this Contract shall conform to the lines, grades and elevations shown on the Plans and with any tolerances which may be set forth in the Construction Specifications.

C. All work completed without being properly located and established from the control reference points and benchmarks shown on the Plans may be ordered removed and replaced at no cost to Division.

D. Features such as terrace high points and low points, terrace outlets, ditches, etc., are shown on the Plans. Locate all features by coordinates or dimensions shown on the Plans. If no coordinates or dimension are shown, Contractor shall obtain this information electronically or request coordinates from Engineer.

E. At the request of the Contractor, Engineer shall provide the site grading plan in a digital format to be used for GPS mounted equipment. The Engineer is not responsible for any misinterpretations or translations of the data that may arise.

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3.4 FINAL PAY QUANTITY SURVEYS

A. Any work item requiring field measurements shall be measured in place by Contractor accompanied by Engineer after said item is complete. Measurements shall be performed as agreed to by both the Engineer and Contractor.

B. In the event surveying is required for final pay quantity, this work shall be performed and certified by a Contractor-retained licensed professional engineer or licensed land surveyor in responsible charge. In lieu of formal surveys, Contractor may wish to accept plan (bid) quantities for certain items as allowed for in the measurement and payment portion of each section.

3.5 INTERIM PAY QUANTITY SURVEYS

Any item of work which requires field measurements, and which is not being submitted as final for that item, need not be certified.

3.6 STAKE OUTS

A. The number of earthwork stake outs is open to Contractor. A minimum of two (2) stake outs are required for earthwork when GPS mounted equipment is not used. The first stake out shall be near the beginning of the project to help establish rough grading limits, along with clearing and project limits. A final stakeout is required to establish final grades prior to liming for subgrade preparation. Interim stake outs shall be used at Contractor’s discretion. The stake out used to establish final grades shall include stakes that are either set on a one hundred (100) foot grid, follow along contour lines with maximum one-hundred (100) feet spacing along the contour, or as needed to result in final grading consistent with project plans. Additional staking may be required to represent all site features. Engineer may request additional grade stakes to verify site features and/or elevations. Stake outs are not to be confused with required surveys for measurement purposes or as-built surveys.

B. If the Contractor has equipment mounted with properly functioning GPS, then only a final check of key points or a final survey is required. The locations and frequency of checked locations shall be determined in consultation with the Engineer.

3.7 AS-BUILT SURVEY INFORMATION

A. The final locations of the items listed below must be surveyed by Contractor. This may be completed during the final stake out listed in 3.6 above or with GPS mounted equipment prior to removal of control points. As-built survey data collected with uncrewed aerial vehicles (UAVs) is preferable. When UAVs are used LiDAR or photogrammetric data is acceptable.

B. The final as-built survey should include the location and elevations of the following items:

1. All terrace ridges and flow lines

2. All riser intake locations inlet elevations, and pipe outlets

3. Site perimeter of disturbed area

4. Any fence installation locations

5. General location and elevation of final grade with enough frequency that a topographic map of final grading can be developed by the Engineer

6. Any other points requested by Engineer or Division

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3.8 RECORD SURVEY NOTES

A copy of all construction survey notes by Contractor’s surveyor, whether written or electronic, should be provided to Engineer as data is acquired.

3.9 PRESERVATION OF LAND SURVEY MONUMENTS

A. Land survey monuments include but are not necessarily limited to: Property pins; Public Land

Survey section corners; elevation benchmarks; or geodetic control points.

B. All known land survey monuments that will be disturbed by construction are noted on the Plans.

C. Whenever any land survey monument is encountered during construction, Contractor shall notify the Engineer and Division and direct his Surveyor to measure the position of the monument and collect all relevant data necessary to restore or replace the monument after construction is complete.

D. Land survey monuments shall be restored or replaced pursuant to the requirements stipulated in

Iowa Code Chapter 355. A monument preservation certificate or a section corner certificate or a retracement plat of survey shall accompany each restored or replaced land survey monument.

E. It shall be the Surveyor’s responsibility to determine and develop the appropriate document for each restored monument and record it in the county where the monument is located. The Surveyor shall provide a copy of the recorded document to Contractor, Engineer and Division.

PART 4 - MEASUREMENT AND PAYMENT

A. Field Engineering shall not be a payment item.

B. Payment for Field Engineering shall be incidental to all items requiring Field Engineering.

4.2 SUMMARY – UNITS OF MEASUREMENT

Not applicable to this SECTION

END OF SECTION 02010

SECTION 02100 July 2025

MOBILIZATION, SITE CLEARING & PREPARATION

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SECTION 02100 - MOBILIZATION, SITE CLEARING & PREPARATION

1.2 REFERENCE SPECIFICATIONS

1.3 QUALITY ASSURANCE

1.4 JOB CONDITIONS

1.5 SUBMITTALS

2.1 MATERIALS

3.1 SITE ACCESS

3.2 SURFACE CONDITIONS

3.3 PROTECTION

3.4 OFFICE AND LAY-DOWN AREA

3.5 STORM WATER POLLUTION PREVENTION PLAN (SWPPP) DOCUMENT STORAGE

3.6 EXISTING FENCES

3.7 CLEARING AND GRUBBING

3.8 DEBRIS REMOVAL AND DISPOSAL

3.9 PROJECT SIGN AND JOB POSTER DISPLAY

3.10 CLEAN-UP AND REPAIRS

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PART 1 - GENERAL

1.1 DESCRIPTION

A. Work included

Work under this SECTION covers requirements for materials, tools, equipment, and services necessary to complete the site preparation and site cleanup work for this project. The work shall include, but is not necessarily limited to, completion of the following work:

1. Mobilization

2. Establishment of offices and project trailer

3. Installation of project sign

4. Acknowledge location of and help maintain electronic SWPPP documentation

5. Establishment of sanitary facilities

6. Removal and salvage of existing fencing

7. Installation and removal of temporary fencing

8. Protection of existing utilities, vegetation, and facilities to remain undisturbed

9. Site clearing and grubbing

10. Debris removal and disposal

11. Demobilization

A. The following specifications or standards are incorporated by reference into this SECTION:

1. Recommendations for Tree protection during construction. Provided by Iowa State University (ISU) Extension Service. Document available at the following website address:

https://naturalresources.extension.iastate.edu/forestry/care_maintenance/construction.h tml

2. SECTION 02120 – SEDIMENT AND EROSION CONTROL

3. SECTION 02200 – EARTHWORK, ROUGH GRADING

4. SECTION 02700 – PERMANENT SEEDING

B. Above-mentioned references, which do not appear printed with the Contract Documents, can be provided to Contractor upon request.

B. In addition to complying with requirements of governmental agencies having jurisdiction, Contractor shall comply with the directives of Engineer or Construction Observer and Division.

C. Trees to remain shall be protected as described in 1.2, A. 1. above.

D. Contractor shall comply with most current guidelines to protect the Indiana Bat and any other species specified in the Appendix or provided by the Division.

A. The Plans do not purport to show all objects existing on the site.

https://naturalresources.extension.iastate.edu/forestry/care_maintenance/construction.html https://naturalresources.extension.iastate.edu/forestry/care_maintenance/construction.html

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B. The locations of utility mains, structures and service connections shown on the plans are approximate only and were obtained from records made available to Engineer and Division.

There may be other existing utilities not known to Engineer and Division and not shown on the Plans. The verification of existence and the exact location determination of utility mains, structures and service connections shall be the responsibility of Contractor.

C. Contractor shall not perform any work on or cause any damage to existing CRP land, wetlands or any other jurisdictional lands that are indicated on the Plans as not to be disturbed. Division has no permit to disturb these areas. These areas are under the jurisdiction of other authorities and any penalties or damages will become the responsibility of the Contractor. In addition, Contractor will complete all work necessary to restore the damage to these areas to an acceptable condition at no cost to Division.

D. Contractor shall not perform work under the drip line of trees that are to remain. Contractor may request that certain trees within the Project Limits shown on the Plans remain in place. If permission is granted, Contractor shall protect these tree(s) from damage.

E. Materials to be handled under this Contract include spoil, gob and coal refuse which may be toxic and/or acidic in nature. Miscellaneous debris, including potentially hazardous materials, are sometimes found on the surface or buried on these sites.

F. Contractor shall not use explosives without written approval of Engineer.

G. Unless indicated otherwise in the Contract Documents, removed, salvaged or demolished materials shall be the property of Contractor. Contractor salvaged materials and demolished materials shall be completely removed from the job site or buried on site as approved by Engineer or Construction Observer. Any items indicated in the Contract Documents to be salvaged to the landowner, such as existing fencing, shall be stored on site at a location approved by Engineer or Construction Observer.

H. Contractor shall conduct all work in a manner which shall minimize, to the greatest practical extent, inconvenience to the public, and which shall result in a final product which leaves the site in an equal or better condition than prior to construction.

I. No trees shall be cleared between the dates of April 1 to September 30 to comply with the requirements of the Indiana bat habitat without the express permission of the Division.

A. Contractor shall provide to Engineer a description and the location of any alternative off-site disposal area to be used other than a licensed landfill.

B. Contractor shall submit a Construction Progress Schedule as specified in SECTION 3-23

CONSTRUCTION SCHEDULE of the General Conditions (Document N).

C. Contractor shall submit weight tickets or billings for all off-site waste disposal, including trash, metal, appliances, tires, hazardous chemicals, etc., to Engineer or Construction Observer.

D. Contractor shall provide Engineer or Construction Observer with record survey notes of all existing fence locations within the projects limits and any adjacent fencing to be temporarily removed prior to removing any existing fence. Contractor shall supply Engineer with record survey notes of any other feature to be documented as noted on the Plans or in the Supplemental Specifications.

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2.1 MATERIALS

A. Provide materials, not specifically described but required for proper completion of the work of this SECTION, as selected by Contractor subject to the approval of Engineer.

3.1 SITE ACCESS

A. Contractor shall access the site as designated on the Plans and/or as discussed at the pre-bid and pre-construction meetings. Any damage that occurs outside of the designated access will be repaired and restored at no cost to Division.

B. Site access may require improvements, which include, but are not necessarily limited to, clearing, excavation, installation of tiling or pipe, and placement of macadam stone, erosion stone, or riprap. Unless noted otherwise in the Supplemental Specifications, work needed to facilitate and maintain access to the site during construction shall be considered incidental to the cost of mobilization. The cost for placement of stabilized construction entrance is included in SECTION

02120 – SEDIMENT AND EROSION CONTROL.

C. Contractor shall remove the site access improvements that can be removed after the project is completed unless permission has been granted to leave them in place by Engineer and Division.

D. Prior to project acceptance by Division, Contractor shall restore access routes as discussed in

Paragraph 3.10.C. Restoration of access routes may include seed bed preparation and seeding that meet requirements of SECTION 02700 -- SEEDING.

3.2 SURFACE CONDITIONS

A. In company with Engineer, visit the site and verify the extent and location of clearing and site preparation required. Completely remove items scheduled to be removed, leaving surfaces clean, solid and ready to receive new materials specified elsewhere.

B. All trees outside the Project Limits shown on the Plans shall remain undisturbed. All trees within the Project Limits, except as noted hereafter, shall be removed. In areas of the site where minimal grading is required, the grading plan should be adjusted slightly in favor of saving well established trees. Cooperate with Engineer to achieve this intent.

3.3 PROTECTION

A. Contractor shall be responsible for locating and protecting all utilities prior to initiating work. If damage does occur to any existing utilities, Contractor shall restore them in a manner acceptable to the utility provider and Engineer or Construction Observer at no cost to the Division.

B. Contractor shall protect existing vegetation as discussed below.

1. Protect tops, trunks and roots of existing trees and/or shrubs, indicated or implied to remain, from damage during all operations. Box, fence around, or otherwise protect trees before adjacent work is started. Do not permit heavy equipment or stockpiles within branch spread. Trim or prune to obtain working space in lieu of complete removal whenever possible. Conform to good horticultural practices. Preserve natural shape and character. Refer to ISU Publication as referenced in 1.2.C above.

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2. Damaged trees shall be repaired or replaced to the satisfaction of Engineer. Repair may include, but not be limited to, trimming, pruning and application of pruning paint.

Repair shall be completed within seventy-two (72) hours of occurrence of damage.

Remove existing vegetation when damage occurs and survival is doubtful.

3. Adjacent areas to the site with established vegetation shall be protected. If access through established vegetation is required, Contractor shall coordinate his access with Engineer or Construction Observer and restore the damaged areas as directed by Engineer.

C. Contractor shall provide protection for persons and property as discussed below.

1. Barricade open depressions and holes occurring as part of this work.

2. Protect structures, utilities and other facilities from damage caused by settlement, lateral movement, undermining, washout, burning of landscape waste, equipment vibration and other hazards created by operations under this SECTION.

D. Contractor shall use means necessary to prevent dust from becoming a nuisance to the public, to neighbors and to other work being performed on or near the site.

E. Contractor shall always maintain access to the site.

F. When requested by Division or Engineer, Contractor shall provide access through the site on an as needed basis to the landowner when access to adjacent lands is restricted.

3.4 OFFICE AND LAY-DOWN AREA

A. Contractor shall establish, provide and initiate use of temporary facilities described herein within thirty (30) days of the initiation of construction activities and prior to the first Progress and Pay Request Meeting. The offices and lay-down area should be in the designated location shown on plans. If no location is provided, then they can be located anywhere within the Project Limits.

Locations outside the Project Limits can only be used if documented permission from landowner on whose property these facilities are to be located is provided.

B. Contractor's Field Office

Provide adequate space for field office personnel, suitably furnished, lighted, heated and air conditioned.

C. Unless specifically indicated elsewhere in the Contract Documents, Contractor shall provide all heat, power, sanitary, and any other utilities or facilities required to perform the work.

D. Contractor shall terminate use and remove facilities at earliest reasonable time when they are no longer needed. Removal of all temporary facilities is required for final acceptance of the completed project.

3.5 STORM WATER POLLUTION PREVENTION PLAN (SWPPP) DOCUMENT STORAGE

A. Division shall establish an electronic designated location to store the SWPPP, all associated reports and records of data used to complete the Notice of Intent.

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Contractor shall have a mobile device readily available while working on the site that can access the electronic designated location.

3.6 EXISTING FENCES

A. Any existing fences within the project limits that are indicated to remain shall be protected. If these fences are damaged, the Contractor shall repair them at no cost to Division. Fences outside of the Project Limits which interfere with construction operations shall not be relocated or dismantled until approval is obtained from Engineer or Construction Observer. In areas where existing fences outside of the Project Limits cannot be maintained due to construction operations, Contractor will be required to provide temporary fences or other means to prevent unauthorized vehicular, pedestrian or livestock access, as applicable. After work is completed in this area, a replacement fence of equal or better material type shall be installed at the same location at no additional cost to Division.

B. Existing fences within the project limits shall be removed. If the plans indicate the fence is to be salvaged to landowner(s), fencing material shall be rolled in neat bundles and secured with salvaged posts stacked neatly and stored at a location on site to be approved by Engineer. If the landowner(s) do not want the fence salvaged to them, the fencing material becomes the property of Contractor and shall be disposed of as discussed in 3.8 below.

C. Where existing fences are removed and subsequently replaced as a part of the work, field establish such reference points and ties as are necessary to ensure replacement fencing will follow the same alignment as the existing fencing.

3.7 CLEARING AND GRUBBING

A. Contractor shall perform clearing and grubbing only to the extent necessary to perform excavation, grading, and other required work.

B. Clearing includes felling and disposal of trees, brush and other vegetation. In cutting of timber growth, cuts shall be made such that all trees are felled into the area to be cleared. Exercise care when clearing near the Project Limits so as not to damage existing trees or vegetation to remain.

C. Clearing also includes removal of all existing fencing materials as discussed in 3.6 above.

D. Grubbing includes removal and disposal of tree stumps and roots larger than three (3) inches in diameter. Stumps and roots within three (3) feet of final (proposed) grades shall be grubbed. Backfill all excavated depressions with nearby soil or spoil material, compact to approximate density of adjacent undisturbed areas, and grade entire area to drain.

E. In areas where the fill depth is greater than five (5) feet, undisturbed stumps and roots extending not more than six (6) inches above the original ground line and surface vegetation do not need to be removed unless they are located within the vicinity of a dam, terrace, or other structural element.

3.8 DEBRIS REMOVAL AND DISPOSAL

A. Contractor shall remove and dispose of debris, rubbish, landscape waste and all other materials resulting from the site clearing and preparation operations by either recycling, burning, burying, off-site disposal, chipping, creating brush piles or a combination thereof. Specifics requirements for various disposal techniques are discussed below.

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B. Burning of Landscape Waste

1. State law requires that burning of landscape waste be limited to areas located at least one-quarter (1/4) mile from any inhabited building, unless a variance is obtained from the Iowa Department of Natural Resources or permission is obtained from all impacted residences located within one-quarter (1/4) mile of the proposed burn area.

2. Contractor shall obtain all necessary permits and comply with all regulatory agencies, including the local fire department, governing this work. The local fire department must be notified prior to any on site burning.

3. Only vegetative matter may be burned on site. Oil base materials are not allowed to be burned on site. Rubber tires cannot be used to start or maintain burning of brush.

4. No burning will be allowed on any area of the site containing coal refuse.

5. Large trees and stumps may require two (2) or more burning sequences. Tree trunks and limbs greater than three (3) inches in diameter may be sawn or cut in lengths not greater than forty-eight (48) inches and buried in lieu of burning.

6. Protection of property, trees and vegetation that are to remain, both inside and outside the Project Limits, shall always be maintained.

C. Burying Woody Debris

1. Trees, stumps, brush and the ashes from the burning of landscape waste may be buried within the project limits provided the requirements below are followed.

a. No burying of debris shall be completed within areas of the site which contain dams, terraces, any other structures, or where future settlement would be detrimental to the successful reclamation of the site.

b. Uncut trees may be placed into the muck at the bottom of dewatered ponds to provide support. The layer of trees shall be placed uniformly over the muck and shall not exceed a total thickness of five (5) feet.

c. All woody material to be buried that is not providing support over muck shall be broken or cut to a maximum dimension of forty-eight (48) inches and shall be spaced so normal fill material can be properly placed and compacted thereon. Mass dumping, without spreading and spacing of debris shall be prohibited. Buried woody debris shall not be allowed to accumulate greater than five (5) feet in depth and shall be covered with a minimum of five (5) feet of soil cover per foot of debris.

d. The top of the uppermost buried woody debris shall be at least five (5) feet below final grade.

e. Burial operations shall be permitted only in the presence of Engineer or

Construction Observer.

2. Farm buildings may be buried provided they are emptied of any contents not authorized for burial and laid flat. Burial operations shall be permitted only in the presence of Engineer or Construction Observer.

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D. Habitat Brush Piles

1. Brush piles for habitat may be used in some areas if permission is received from the landowner.

2. The location and number of brush piles shall be approved by Engineer or

Construction Observer.

3. Brush piles shall not exceed fifty (50) feet in diameter and ten (10) feet in height.

E. Burial of Rocks and/or Coal Refuse: See Earthwork, Rough Grading, SECTION 02200, 3.8

F. Off-site Waste Disposal

1. Any household trash, tires, hazardous materials, etc. present at the site, whether shown on the plans or encountered during construction, shall be removed off-site to a licensed landfill or other location approved by Engineer. Weight tickets or billings are required for payment purposes.

2. Small debris and trash shall be removed by hand or with small equipment to avoid inclusion of excessive amounts of soil with the trash. If Division or Engineer or Construction Observer determines that excessive amounts of soil are included with the trash, additional hand sorting will be required.

3. Metal objects present at the site shall be salvaged where possible or taken to a licensed landfill or other approved location.

4. Special waste disposal items, such as tires, batteries, appliances or other hazardous materials, are handled separately. Contractor shall account for and dispose of these special waste disposal items as discussed in the Supplemental Specifications and/or on Plans, or as negotiated in an approved change order.

3.9 PROJECT SIGN AND JOB POSTER DISPLAY

A. Project Sign

1. The Division and any partners will provide the Contractor with the appropriate sign panels to be installed at the site.

2. Contractor shall provide the posts and necessary hardware to install the sign as shown on the plans. The sign location shall be approved by Engineer or Construction Observer prior to its installation.

3. The Division reserves the right to delay payment of the second application for payment until the project sign is in place.

4. Upon completion of all the work and final acceptance by Division, Contractor shall be responsible to remove the "Hard Hat Area" portion of the sign. This portion of the sign will be returned to the Division.

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B. Job Poster Display

1. Upon beginning construction, Contractor shall install a Job Poster Display in a conspicuous location, approved by Division, which is visible to Contractor’s employees and representatives of State and Federal agencies. The approved location for the Poster Display may not necessarily be in the same location as the Project Sign.

2. The Job Poster Display shall be securely fastened to a durable object against movement by wind or vandalism, but it will not be considered permanent. It will be removed from the site after completion of construction.

3. The Division shall delay payment of the second application for payment until the Job

Poster Display is in place.

4. The display shall be sufficiently sized to accommodate all applicable posters required by the US Department of Labor and State of Iowa. All posters shall be provided to Contractor by Engineer at the pre-construction meeting and all posters shall be securely fastened to the display.

5. At a minimum the 11”x17” Davis-Bacon poster and the current wage determination shall be displayed. Additional posters may be required for display as directed by the Engineer or Division.

6. Weather protection: Contractor shall laminate each poster with clear plastic film or cover the entire display with suitable transparent plastic sheeting. Plexiglas™ (or equal) clear acrylic sheet will be considered preferrable. The cover should make the entire display rain tight. The entire display board should be painted or sealed against moisture and deterioration.

7. Contractor shall replace all posters damaged by fading or moisture in timely fashion determined by Engineer or Division.

3.10 CLEANUP AND REPAIRS

A. Contractor shall remove equipment, project materials and waste such as oil drippings, stones, gravel, packaging containers, etc., from the site and dispose of all waste at an approved off-site location.

B. Contractor shall repair all areas of rill erosion with a depth greater than three (3) inches and width greater than four (4) inches, or as directed by Engineer or Construction Observer.

C. All disturbed areas outside the Project Limits, such as access routes and lay down areas, shall be returned to their original condition by Contractor. Restoration of these areas are subject to the approval of the Engineer and/or Division.

D. The materials, equipment and labor for cleanup and repairs are at no cost to Division.

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A. The construction cost of all work included in this SECTION of the Construction Specifications shall be included in Contractor's unit prices set forth in the Proposal and Schedule of Prices (Document C) for the work items described below.

B. The unit price for each of these items shall include its pro rata share of overhead so that the sum of the products obtained by multiplying the unit prices so set forth by the amount of the work constructed and measured as described herein, shall constitute full payment to Contractor for performance of the work included in this SECTION.

Measurement and payment for each work item in this SECTION shall be in accordance with the following:

1. Mobilization: Payment for the cost of mobilization and demobilization and other incidental work thereto shall be included in the lump sum price set forth for "Mobilization." The lump sum price set forth in Contractor's Proposal and Schedule of Prices (Document C) shall include full compensation for mobilization; for work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to and through the site; for establishment of offices, trailers and other facilities necessary for work on the project; for installing the project sign and removing a portion thereof; for having device on site to access electronic location of SWPPP while working, for demobilization and cleanup and repairs; for all other work or operations which must be performed or costs incurred when beginning or performing work on the project including bonding, insurance, obtaining permits, filing affidavits, paying fees, etc.

See General Conditions (Document N) Item 6-01 and any permits included in an appendix to the specifications. This bid item also includes any additional work or materials needed to maintain the access route during construction.

The amount which Contractor will receive payment for, in accordance with the following schedule, will be limited to five (5) percent of the total Contract bid. Should the Contractor’s bid for this item exceed five percent (5%), the amount over five (5) percent will not be paid until the Contract is finalized.

Basis of Payment: Partial payment of the lump sum amount bid for Mobilization, not exceeding five (5) percent, will be made in accordance with the following schedule:

a. Upon Contract execution, ten (10) percent of the pay item will be paid.

b. When five (5) percent or more of the original Contract amount is earned, an additional twenty (20) percent of the pay item will be paid.

c. When ten (10) percent or more of the original Contract amount is earned, an additional twenty (20) percent of the pay item will be paid.

d. When fifty (50) percent or more of the original Contract amount is earned, the remaining balance of the pay item will be paid up to a maximum of five (5) percent of the total bid.

Nothing herein shall be construed to limit or preclude partial payments for other items as provided for by the Contract.

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2. Site Clearing & Preparation: The unit price for this work item, as shown in Contractor's Proposal, shall include full payment to Contractor for all clearing, site preparation, debris removal and disposal, fence removal, collecting and sorting special items like tires, and other work incidental thereto as required to complete the Project in accordance with requirements of the Contract Documents. This work shall be completed within all areas disturbed by construction operations and limited to the total area enclosed by the "Project Limit" lines shown on the Plans. Partial payments will be made based upon the estimated number of acres cleared or the percentage of clearing that is completed at the time of the pay request.

3. Off-site Waste Disposal: The unit price for this work item as shown in Contractor's

Proposal, shall include full payment to Contractor for all work necessary to collect, load, transport, landfill fees and other work incidental thereto as required to complete the project in accordance with the requirements of the Contract Documents. The waste materials will be measured on the loaded ton as determined from weight tickets. The total estimated quantity for this work item includes only the household trash from the locations noted.

Special waste disposal items such as tires, batteries, appliances, or hazardous waste, will be paid for separately as discussed in the Supplemental Specifications and/or on Plans.

If unanticipated special waste disposal items are discovered during construction, they will be addressed with a change order.

Units of measurement for bid items applicable to work covered by this SECTION are as follows:

Description Unit Mobilization Lump Sum Site Clearing and Preparation Acre Off-site Waste Disposal Ton Special Waste Disposal Per Ticket

END OF SECTION 02100

SECTION 02110 July 2025

IMPOUNDMENTS

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SECTION 02110 - IMPOUNDMENTS

1.2 REFERENCE SPECIFICATIONS

1.3 QUALITY ASSURANCE

1.4 PERMITS

1.5 JOB CONDITIONS

1.6 SUBMITTALS

2.1 LIME MATERIALS

2.2 DELIVERY, STORAGE AND HANDLING

3.2 PRECAUTIONS

3.3 DISCHARGING ON SITE

3.4 WATER SAMPLING AND TESTING (ALL IMPOUNDED WATER BODIES)

3.5 NEUTRALIZATION AND DISCHARGING PLANNING MEETING

3.6 WATER TREATMENT (IMPOUNDED WATER BODIES REQUIRING NEUTRALIZATION PRIOR TO

DISCHARGING)

3.7 DISCHARGE OF IMPOUNDMENTS

3.8 TREATMENT AND DISCHARGE SUMMARY

PART 4 – MEASURMENT AND PAYMENT

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Work Included

Work under this SECTION covers requirements for materials, tools, equipment and services necessary to complete the neutralization of the acid water and discharge of the impoundments for this project. The work shall include, but is not necessarily limited to, completion of the following work:

A. Water quality testing of existing water bodies to be discharged.

B. Development of the Neutralization and Dewatering Plan.

C. Neutralization of acid water.

D. Water quality verification tests.

E. Discharge of neutralized impounded water bodies.

A. The following specifications or applicable standards are incorporated by reference into this

SECTION:

1. National Pollutant Discharge Elimination System (NPDES) Parameters

2. Storm Water Pollution Prevention Plan (SWPPP)

3. ANSI/AWWA B202-93

4. SETION 02120 – SEDIMENT AND EROSION CONTROL

5. SECTION 02200 – EARTHWORK, ROUGH GRADING

6. SECTION 02700 – PERMANENT SEEDING

B. Above-mentioned references, which do not appear printed with the Contract Documents, can be provided to Contractor upon request.

B. Contractor shall use equipment adequate in size, capacity, and numbers to accomplish the work in a timely manner.

C. In addition to complying with requirements of governmental agencies having jurisdiction, Contractor shall comply with the directives of Engineer and Division.

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1.4 PERMITS

Division and hence Contractor must comply with the requirements of a NPDES permit for discharge of water off the site. The water quality standards for discharged water are specified in this SECTION.

1.5 JOB CONDITIONS

A. The site requires dewatering of impounded water bodies to complete the required grading. The anticipated water bodies to be dewatered are indicated on the Plans. However, depending on weather conditions prior to and during construction, the number of water bodies required to be dewatered may be more or less than the number shown on the Plans.

B. Some sites have water bodies that are not to be disturbed and shall remain at the site. These water bodies, if any, are identified on the plans. Care should be taken to minimize disturbance to the areas surrounding these water bodies and minimize the amount of sediment delivered to them. Appropriate measures shall be taken to protect those water bodies from sediment as shown on the SWPPP or as directed by the Engineer and Division.

C. Water quality evaluations of the water bodies at the site have been taken during project development. Those water bodies anticipating treatment prior to discharge are noted on the Plans. Water quality can change over time and new tests of all water bodies requiring discharge off site must be taken during construction and prior to discharge to determine if treatment is required and to what extent. It is also possible that water quality can change during discharging operations, requiring cessation of discharging operations and additional treatment before discharging can continue.

D. Water that does not meet the NPDES parameters may not be discharged off site until acceptable neutralization is obtained. Contractor may not proceed with liming treatment(s) without the approval of Engineer.

E. The materials used to neutralize acidic water are caustic and Contractor shall take appropriate precautionary measures when handling hydrated lime. See Item 3.2 in this SECTION.

F. It may be feasible to discharge impoundments on the site depending upon several factors.

Approval is required from Engineer and Division before an impoundment may be discharged on site. Neutralization of acid water is not required if approval is granted and the on-site discharge is properly executed.

1.6 SUBMITTALS

A. Neutralization and Discharge Plan for Impounded Water

The Neutralization and Discharge Plan shall be submitted by the Contractor to Engineer and Division prior to commencement of any dewatering or discharge. The plan should include as a minimum:

1. Anticipated start date for treatment and/or discharge.

2. Sequence and general description of discharge (i.e. on site or off-site)

3. Methodology for incorporation of hydrated lime to neutralize acid water if this is anticipated.

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4. Copy of Site Plan with discharge locations identified, including any erosion protection measures needed.

B. Laboratory Approval

Contractor shall select a testing laboratory to provide testing required under this SECTION. The name and address of the testing laboratory used in this work shall be submitted to and must be approved by Engineer prior to start of this work.

The testing laboratory may perform the required testing on site provided the work plan describing the proposed treatment, equipment, and the field methods of testing have been accepted by Engineer prior to start of this work. Field testing equipment must meet the minimum resolution capabilities and be able to provide measurements within the minimum ranges listed below:

MINIMUM FIELD-TESTING EQUIPMENT REQUIREMENTS

Parameter Units Range Increments pH unit 4.0-10.0 0.1 units total iron mg/l 0.5-10.0 0.1 mg/l suspended solids mg/l 0-500 5.0 mg/l acidity/alkalinity mg/l as needed 5.0 mg/l

C. Certification and Receipts

1. Submit certification that liming agents meet the minimum criteria of this SECTION.

2. Submit receipts and weigh tickets of liming agents delivered to the project site.

D. Test Results

Submit results of water quality test results for both before and after neutralization, neutralization determinations, and field quality tests taken during discharge operations.

2.1 LIME MATERIALS

Hydrated lime [Ca(OH)2] shall meet requirements of ANSI/AWWA B202-93 and shall not have less than sixty-two (62) percent available calcium oxide which is equivalent to eighty-one and nine-tenths (81.9) percent calcium hydroxide.

2.2 DELIVERY, STORAGE AND HANDLING

A. Deliver liming agents to the site in their original containers with all labels or certificates intact and legible for Engineer's inspection.

B. Contractor shall use all means necessary to protect materials from the elements during storage and handling.

C. In the event of damage or rejection, Contractor shall immediately make all replacements necessary to the approval of Engineer at no additional cost to Division.

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Examine the areas and conditions under which work of this SECTION will be performed. Correct conditions that are detrimental to timely and proper completion of the work. Do not proceed until unsatisfactory conditions are corrected.

3.2 PRECAUTIONS

Hydrated lime is a caustic material. Sustained and unprotected exposure to hydrated lime may be hazardous to workers. Contractor shall instruct workers in the proper handling of bulk lime and lime slurry and shall take all necessary steps to protect working personnel and the public.

3.3 DISCHARGING ON SITE

A. Discharging impounded water on site is allowed provided all of the following requirements are met.

1. Engineer and Division agree that discharging water onsite is feasible.

2. Water can be released onto the site in a controlled manner either through pumps or careful breaching of dikes.

3. Designated release areas can absorb the water without exiting the site either by direct runoff or through groundwater by observable seeps.

B. If the Engineer and/or Division determines that discharging operations on site are having a negative impact on the overall project or cannot be contained on site, Contractor shall immediately discontinue discharging operations and develop alternative plan. If it is determined that on site discharge is not feasible, then the water shall be sampled, treated with lime as needed, and discharged off site. No additional compensation, other than the cost of lime to neutralize the water will be added to the contract.

3.4 WATER SAMPLING AND TESTING (ALL IMPOUNDED WATER BODIES)

A. Contractor shall obtain composite samples of all impounded water to be discharged off site. This round of composite samples from each impounded water body shall be used to determine if treatment is necessary or not. If test results indicate treatment is not necessary, the impounded water may be discharged off site with periodic field testing during discharge. If treatment is necessary, the test results shall be used to evaluate the amount of lime required to neutralize the acid water.

B. Contractor shall collect composite samples and submit them for testing as follows:

1. At least one (1) composite water sample shall be taken from each impoundment.

Impoundments containing more than ten (10) acre-feet of water shall have one (1) additional sample shall be taken for every ten (10) acre-feet of water or fraction thereof.

2. A composite sample shall consist of equal parts of four (4) surface samples taken throughout the area the composite sample represents. The location of all sampling points shall be such that when all the composite samples are obtained for a given impounded water body, they are representative of the entire impounded water body area insofar as practical.

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3. Obtain sample bottles of proper type and size with appropriate preservatives, as well as sample gathering and delivery procedures, directly from the laboratory. Store and ship samples refrigerated (under ice) as required by laboratory.

4. Each composite sample shall be delivered to the approved laboratory within twenty-four (24) hours of collection. Each composite sample shall be tested for pH, total acidity/alkalinity as Calcium Carbonate (mg/l), total iron (mg/l), and total suspended solids (mg/l).

5. Contractor shall submit copies of the laboratory results to Engineer and Division prior to the meeting at the site to develop the neutralization or discharge plan.

6. Contractor shall pay all costs associate with sampling and testing.

3.5. NEUTRALIZATION AND DEWATERING PLANNING MEETING

Contractor, Engineer, and Division shall meet at the site to discuss and develop the neutralization and dewatering plan. The Contractor foreman or other personnel who will be responsible for this portion of the work must be in attendance at this meeting. The minutes of this meeting shall be prepared by Engineer and distributed to all parties prior to initiating this portion of the work. The neutralization and dewatering plan shall at a minimum include the following:

A. Schedule for completion of neutralization if necessary, and dewatering for all impounded water along with a list of personnel planned to complete this work.

B. In the case of multiple acidic impounded water bodies, the proposed order in which the impounded water bodies will be neutralized and dewatered will be identified in the Neutralization and Discharge Plan. Water may be moved within the site from one impounded water body to another before neutralizing or discharging off site. This can be done by pumping or gravity flow, provided that all three of the conditions listed below are met.

1. The receiving impounded water body is structurally sound and has adequate capacity to contain the discharge.

2. There is no significant transfer of soft sediment (muck) into the receiving impounded water body.

3. There is no outflow of water off the project site.

C. Laboratory approval information as required in Paragraph 1.6B., Laboratory Approval of this

SECTION.

1. Method(s) to be used to neutralize the water, including the number and types of equipment to be used. If multiple methods are used, it shall be determined which method will be used on each impounded water body.

2. Proposed water sampling methods used to ensure that neutralized water meets NPDES discharge limits as outlined in Item 3.7 DISCHARGE OF IMPOUNDMENTS found in this

SECTION.

3. A copy of the site plan(s) showing the routes of discharge for each impounded water body and location of any constructed basins or modified impounded water bodies used for neutralization of acidic water on site.

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4. Erosion protection to be used on discharge routes.

5. Safety precautions to be used to ensure workers will be protected from the caustic effects of hydrated lime.

3.6 WATER TREATMENT (IMPOUNDED WATER BODIES REQUIRING NEUTRALIZATION PRIOR TO DISCHARGE)

A. Hydrated lime for neutralization of acid impoundments shall not be applied during periods where the ambient temperature is anticipated to be below freezing or when ice is present on the surface of the untreated water body.

B. Applications of lime as a dry powder directly to the water surface over the entire impounded water body shall not be permitted. The hydrated lime shall be mixed with the impounded water and applied as a slurry.

C. The impounded water shall be continuously circulated during application of the slurry to assure…