1-HOFFMANS MILL DAM REMOVAL - TECHNICAL SPECIFICATIONS - IFB 2026-06-26.pdf

BRANDYWINE CONSERVANCY AND MUSEUM OF ART

TECHNICAL SPECIFICATIONS

for

HOFFMAN�S MILL DAM REMOVAL

at

1 HOFFMANS MILL ROAD, CHADDS FORD, PA 19317

HOFFMAN�S MILL DAM REMOVAL

BRANDYWINE CONSERVANCY & MUSEUM OF ART

Rev. June 26, 2026 01 71 13 - 1 Mobilization and Demobilization

SECTION 01 71 13

MOBILIZATION AND DEMOBILIZATION

ARTICLE 1�GENERAL

1.01 DESCRIPTION

A. Mobilization shall include the purchase of Contract bonds and all necessary permits;

transportation of all personnel, equipment and operating supplies to the site; establishment of offices, buildings, sanitary facilities, and other necessary facilities at the site; and other preparatory work at the site.

B. Demobilization shall include removal of all unused material and equipment including field offices. Any salvaged material not specified to be disposed of otherwise shall become the property of the Contractor and removed from the site. All trash shall be removed as directed by the Engineer and disposed of according to local regulations. All work shall be neatly cleaned, upon completion. Demobilization shall include the preparation of all as-built documents or closeout reports as required by the Contract.

C. At the completion of the project, the Contractor shall remove all temporary facilities and structures unless expressly directed otherwise, and shall remove remaining waste materials of all kinds from the site and structures occupied during the progress of the work. The

Contractor shall leave the site and any adjacent properties which may have been affected by his operation in a neat and satisfactory condition.

1.02 PAYMENT

A. The basis of payment for Mobilization and Demobilization shall be as follows.

1. The amount bid for mobilization shall not exceed four percent (4%) of the total contract bid price excluding the bid price for mobilization.

2. 50% of the lump sum amount bid for Mobilization and Demobilization shall be made payable to the Contractor whenever he shall have completed five percent (5%) of the total Contract Work. 5% of the Work shall be considered complete when the total of payments earned, as reflected by estimates of work done, not including the amount bid for this payment item, nor payments for materials delivered to the site, exceeds 5% of the total amount of the bid for this Contract.

3. The remaining 50% of the lump sum amount bid for Mobilization and Demobilization shall be made payable to the Contractor upon substantial completion of the Work, final restoration of the Site, removal of all Contractor equipment, supplies and facilities and completion of all Contract closeout documentation.

ARTICLE 2�PRODUCTS

Not Used

Rev. June 26, 2026 01 71 13 - 2 Mobilization and Demobilization

ARTICLE 3�EXECUTION

END OF SECTION

Rev. June 26, 2026 02 41 19 - 1 Selective Demolition

SECTION 02 41 19

SELECTIVE DEMOLITION

ARTICLE 1�GENERAL

1.01 DESCRIPTION

A. This Section includes:

1. Demolition and removal of selected portions of structures.

2. Demolition and removal of selected site elements.

3. Salvage of existing items to be reused or recycled.

1.02 DEFINITIONS

A. Demolish/Remove: Detach items from existing construction and legally dispose of them off-site unless indicated to be removed and salvaged or removed and reinstalled.

B. Remove and Salvage: Carefully detach from existing construction, in a manner to prevent damage, and deliver to the Owner ready for reuse.

C. Remove and Reinstall: Detach items from existing construction, prepare for reuse, and reinstall where indicated on the Contract Drawings.

D. Existing to Remain: Existing items of construction that are not to be permanently removed and that are not otherwise indicated to be removed, removed and salvaged, or removed and reinstalled.

1.03 PAYMENT

A. Payment will be based on estimated percentage of completion of actual demolition work at the time of progress payment requests.

1.04 MATERIALS OWNERSHIP

A. Unless otherwise indicated, demolition waste becomes the property of the Contractor.

B. Historic items, relics, antiques, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, and other items of interest or value to Owner that may be uncovered during demolition shall remain the property of the Owner.

1. Upon encountering a possible historic item, notify the Engineer and Owner prior to disturbing the item.

2. Carefully salvage in a manner to prevent damage and promptly return to owner.

3. Historic items are not anticipated to be encountered during demolition. Should any item of potential interest be encountered, notify Engineer for determination.

1.05 PREDEMOLITION MEETINGS

A. Pre-demolition Conference: Conduct a pre-demolition conference at the project site.

1. Inspect and discuss condition of construction to be selectively demolished.

Rev. June 26, 2026 02 41 19 - 2 Selective Demolition

2. Review and finalize selective demolition schedule and verify availability of materials, demolition personnel, equipment and facilities needed to make progress and avoid delays.

3. Review areas where existing construction is to remain and requires protection.

4. Verify items to be Removed and Salvaged and confirm method for delivery to Owner.

1.06 INFORMATIONAL SUBMITTALS

A. No submittals are required.

1.07 FIELD CONDITIONS

A. Conditions existing at time of inspection for bidding purposes will be maintained by the

Owner as far as practical.

B. Notify the Engineer of discrepancies between existing conditions and Contract Drawings before proceeding with selective demolition.

C. Hazardous Materials: It is not expected that hazardous materials will be encountered in the

Work.

1. If suspected hazardous materials are encountered, do not disturb; immediately notify the Engineer and Owner. Hazardous materials will be removed by the Owner under a separate Contract.

D. Storage or sale of removed items or materials on-site is not permitted.

ARTICLE 2�PRODUCTS

Rev. June 26, 2026 02 41 19 - 3 Selective Demolition

ARTICLE 3�EXECUTION

3.01 EXAMINATION

A. Survey existing conditions and correlate with requirements indicated to determine the extent of selective demolition required.

B. If unanticipated mechanical, electrical, or structural elements that conflict with the intended function or design are encountered, investigate and measure the nature and extent of the conflict. Promptly submit a written report to the Engineer.

3.02 PREPARATION

A. Site Access and Temporary Controls: Conduct selective demolition and debris removal operations to ensure minimum interference with roads, streets, walks, walkways and other adjacent occupied and used facilities.

B. Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

3.03 SELECTIVE DEMOLITION, GENERAL

A. General: Demolish and remove existing construction only to the extent shown on the contract drawings. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Proceed with selective demolition systematically, from higher to lower level.

2. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of off-site.

3. Dispose of demolished items and materials promptly.

B. Removed and Salvaged Items:

1. Clean salvaged items.

2. Pack or crate items after cleaning. Identify contents of containers.

3. Store items in a secure area until delivery to Owner.

4. Transport items to Owner's storage area designated by Owner.

5. Protect items from damage during transport and storage.

C. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition.

3.04 SELECTIVE DEMOLITION PROCEDURES FOR SPECIFIC MATERIALS

A. General: Selective demolition methods shall not injure the existing features to remain.

3.05 DISPOSAL OF DEMOLISHED MATERIALS

A. General: Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indicated to remain Owner's property, remove demolished materials from Project site and legally dispose of them. Materials shall be recycled to the greatest extent practical.

1. Do not allow demolished materials to accumulate on-site.

Rev. June 26, 2026 02 41 19 - 4 Selective Demolition

2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Burning: Do not burn demolished materials.

3.06 CLEANING

A. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to the conditions existing before selective demolition operations began.

Rev. June 26, 2026 31 23 19 - 1 Dewatering and Control of Water

SECTION 31 23 19

DEWATERING AND CONTROL OF WATER

ARTICLE 1�GENERAL

1.01 SUMMARY

A. This Section includes the requirements for the dewatering of the existing impoundment created by Hoffman�s Mill Dam and the diversion and control of surface water and groundwater as needed to perform the required construction in accordance with the methods specified herein and as shown on the Contract Drawings.

B. The Contractor is required to obtain any permits required for the dewatering and diversion of water required in this specification. Note, the Owner and Engineer have obtained a Permit to Draw Off Water from Impoundments.

C. The Contractor will be required to protect, salvage and relocate or dispose of fish as needed prior to and/or during dewatering and control of water operations, including fish caught in temporary diversion equipment/structures.

D. The existing impoundment is created by the run-of-river Hoffman�s Mill Dam which impounds the Brandywine Creek.

E. The Contractor will be required to provide measures to collect and divert water as needed to keep the work area dewatered during construction.

1.02 DESCRIPTION OF WORK

A. The collection, salvage and relocation or disposal of incidental fish caught in temporary diversion equipment/structures , if necessary.

B. The design, installation and maintenance of measures as needed to keep the project work area dewatered during construction.

C. Providing for the control of soil erosion and sediment transport in accordance with the specifications and applicable local, state and federal regulations and the Contract Drawings.

1.03 SUBMITTALS

1. No submittals are required.

1.04 QUALITY ASSURANCE

A. It is recommended that the Contractor engage the services of a licensed Professional

Engineer experienced in hydrologic and hydraulic analyses to assist in the development of his Control of Water Plan, if necessary.

B. The Contractor shall provide qualified personnel to oversee the relocation or disposal of fish prior to and/or during dewatering and diversion operations, if necessary.

ARTICLE 2�PRODUCTS

ARTICLE 3�EXECUTION

Rev. June 26, 2026 31 23 19 - 2 Dewatering and Control of Water

3.01 DEWATERING OF EXISTING IMPOUNDMENT

A. The Contractor may elect to dewater and lower the existing impoundment. The impoundment is already partially lowered due to a breach at the dam�s right abutment.

B. The existing impoundment has a tributary drainage area of approximately 285 square miles.

C. The contractotr shall utilize measures to minimize the discharge of sediment laden water from the upstream impoundment during dewatering. These measures may include the installation of temporary dewatering facilities to filter water.

3.02 PROTECTION OF WILDLIFE

A. The Contractor shall implement reasonable practices and procedures to prevent the unnecessary death of fish, amphibians, reptiles and/or birds as a result of the removal the water within the upstream impoundment.

1. No recent surveys have been performed to identify the species present in the impoundment or their numbers.

B. The Contractor shall promptly collect, remove and properly dispose of any fish that are not relocated or do not survive dewatering in accordance with all local, state and federal waste management regulations. The Contractor shall make all reasonable efforts to prevent dead fish from becoming a nuisance.

C. If, during dewatering operations, any endangered or threatened species is encountered, the

Contractor shall immediately suspend dewatering operations and notify the Engineer. The

Engineer will consult with the Owner and the appropriate regulatory agency regarding the appropriate measures to be implemented prior to resuming dewatering. Potential Bog Turtle habitat was found immediately outside the project limits of disturbance during a Phase I Bog

Turtle Habitat Survey.

3.03 DIVERTING NORMAL FLOW

A. The Contractor shall furnish, install and operate all necessary pumps, well points, piping, and other facilities and equipment needed to divert the normal flow in the Brandywine Creek from the work areas.

B. Median flow in the Brandywine is estimated to average 320 cubic feet per second. Actual flow rates may vary depending on the season and amount of recent precipitation.

C. The Contractor shall maintain a constant flow in the Brandywine Creek at all times. Flows may be temporarily reduced, but at no time shall all flow be stopped.

D. Once the dam removal has been completed and stabilized, all temporary diversion measures will be removed. Removal of temporary diversions may need to be phased at the direction of the Engineer depending on the characteristics of the stream bottom.

3.04 DIVERTING OTHER SURFACE WATER AND GROUNDWATER

A. The Contractor shall furnish, install and operate all necessary pumps, well points, piping, and other facilities and equipment needed to divert flows from surface water and groundwater around the construction site.

B. Temporary stormwater control or diversion facilities shall be designed at a minimum to prevent the inflow from the 2-year, 24-hour duration design storm event from submerging

Rev. June 26, 2026 31 23 19 - 3 Dewatering and Control of Water the active work area until stabilized. The 2-year storm event has a 50% probability of being exceeded in any given year and consists of a total of 3.28 inches of precipitation in a 24-hour period.

3.05 MONITORING

A. The Contractor shall monitor all control of water measures on a daily basis for as long as the temporary diversion measures are in place. Repairs or modifications to the diversions shall be performed promptly to correct any deficiencies.

B. The Contractor shall monitor weather forecasts for impending storm events. In the event that a forecast storm event is likely to overwhelm the Contractor's control of water measures, the Contractor shall stop work and immediately install temporary stabilization measures to prevent uncontrolled erosion within the work area and the release of excessive amounts of sediment to downstream waters to the extent practicable.

Rev. June 26, 2026 31 25 00 - 1 Erosion and Sediment Control

SECTION 31 25 00

EROSION AND SEDIMENT CONTROL

ARTICLE 1�GENERAL

1.01 SUMMARY

A. This Section includes erosion and sediment control measures intended to minimize erosion of soils and sedimentation of adjacent waterways and lands adjacent to or affected by the work.

1.02 REFERENCES

A. Materials and installation shall be in accordance with the project Erosion and Sediment

Control Plan (E&S Plan) and the latest revisions of the following codes, standards, and specifications:

1. Title 25 Pennsylvania Code, Chapter 102

2. Title 25 Pennsylvania Code, Chapter 105

3. Erosion and Sediment Pollution Control Program Manual (E&S Manual), Pennsylvania

Department of Environmental Protection (PADEP) Technical Guidance Number 363-

2134-008 (March 2012).

1.03 SUBMITTALS

A. The Contractor shall submit product data consisting of manufacturer's cut sheets for:

B. Compost Filter Socks

C. Rolled Erosion Control Mats or Blankets

D. Pumped Water Filter Bags (if utilized)

ARTICLE 2�PRODUCTS

2.01 SUMMARY

A. The Contractor shall provide all materials as needed to perform the specified work. Materials shall include compost filter socks, vegetation, stone, filter cloth, or other manufactured products to reduce erosion and control siltation.

2.02 COMPOST FILTER SOCKS

A. Compost filter socks shall consist of Silt Soxx as manufactured by Filtrexx International LLC or approved equal.

B. Compost filter socks shall be of the size indicated on the Contract Drawings.

2.03 STABILIZED CONSTRUCTION ENTRANCE

A. Stone used for stabilized construction entrances shall be AASHTO #1. Equivalent material

(i.e., reclaimed concrete) may be used with approval from the Engineer.

B. Geotextile underlayment shall consist of Mirafi 500X or approved equal.

Rev. June 26, 2026 31 25 00 - 2 Erosion and Sediment Control

C. Overall dimensions and installation notes are as shown on the Contract Drawings and the

E&S Manual.

2.04 ROLLED EROSION CONTROL MATS OR BLANKETS

A. Rolled erosion control mats or blankets shall be used for stabilization of all vegetated slopes

3:1 (horizontal:vertical) or steeper or as indicated on the Contract Drawings.

B. Erosion Control blankets shall be a machine produced mat of 100% straw with a functional longevity of up to 12 months. The blanket shall be of consistent thickness with the straw distributed evenly over the entire area of the mat. The blanket shall be covered on top and bottom sides with a 100% biodegradable woven natural fiber netting.

C. Acceptable products:

1. BioNet S150BN Erosion Control Blankets as manufactured by Tensar North American

Green.

2. ECS-2B Double Net Straw Biodegradable Rolled Erosion Control Product as manufactured by East Coast Erosion Blankets.

3. Approved Equal.

2.05 PUMPED WATER FILTER BAGS (IF UTILIZED)

A. Pumped water filter bags shall consist of high volume filter bags made from non-woven geotextile material sewn with high strength, double stitched "J" type seams. They shall be capable of trapping particles larger than 150 microns.

B. Specific material properties, dimensions and installation notes shall be as indicated on the

Contract Drawings or in the E&S Manual.

ARTICLE 3�EXECUTION

3.01 SEQUENCE

A. The Contractor may elect to dewater and lower the existing impoundment, but must maintain flow in the creek downstream of the dam.

B. Construction shall be performed in accordance with the sequence of construction indicated on the Contract Drawings.

C. A stabilized construction entrance shall be installed at the location indicated on the Contract

Drawings.

D. Compost filter socks shall be installed at the toes of embankments, on downstream portions of the site perimeter, around spoil piles and stockpiles and wetlands, as shown on the

Contract Drawings or as directed by the Engineer.

E. Additional erosion and sediment control (E&S) facilities shall be installed as shown on the

Contract Drawings or as directed by the Engineer. These facilities shall remain in place until construction activities are completed and the site is stabilized.

F. Staging areas for construction vehicles, equipment, and supplies shall be established by the

Contractor in areas approved by the Owner's Representative.

Rev. June 26, 2026 31 25 00 - 3 Erosion and Sediment Control

G. The site shall be cleared and grubbed within the limits of work only. Care shall be taken to minimize impacts to wetlands and other sensitive areas. Cleared vegetation, soil, and other debris shall be stockpiled in approved areas for disposal at an approved location.

H. Topsoil shall be stripped and stockpiled in areas approved by the Engineer.

I. Exposed soil shall be stabilized, topsoiled, seeded, and mulched as specified.

J. Until stabilization of the site and approval of final site inspection, temporary E&S measures shall not be removed.

3.02 STABILIZATION

A. Until the site is stabilized, all erosion and sediment control measures must remain in place and be maintained properly.

B. Final stabilization shall be defined as a minimum density uniform 70% perennial vegetative cover or other non-vegetative cover with a density sufficient to resist accelerated surface erosion and subsurface characteristics sufficient to resist sliding and other movements. Areas of riprap shall be considered stabilized once the entire area to be armored has been completed.

C. Areas shall be stabilized in accordance with the Contract Drawings. For portions of the site where soil disturbance activities have temporarily or permanently ceased, stabilization measures must be implemented within 7 calendar days of the conclusion of activities.

D. Disturbed areas that are at finished grade or will not be redisturbed within one year must be stabilized in accordance with the permanent vegetative stabilization specifications.

E. Disturbed areas that are not at finished grade or will be redisturbed within one year must be stabilized in accordance with the temporary vegetative stabilization specifications.

F. Vegetated areas with slopes 3:1 (horizontal:vertical) or steeper shall be stabilized with rolled erosion control mats or blankets after topsoiling and seeding. Mats shall be installed and anchored according to the manufacturer's instructions and as indicated on the Contract

Drawings. Areas with slopes flatter than 3:1 shall be mulched with straw mulch according to the notes and details on the E&S Plan and as indicated in the E&S Manual.

3.03 ADDITIONAL CONTROLS

A. The following additional controls and measures are to be implemented at the site to minimize pollutant transport:

1. Proper precautions are to be taken so materials do not spill onto public thoroughfares.

If materials are dropped onto these areas they are to be cleaned or removed as soon as practicable so that they do not enter surface and subsurface drainage systems.

2. The Contractor is to provide dust control measures to mitigate dust migration off-site.

Measures may include water application or mulching and shall not include use of chemical additives.

3. Solid waste disposal dumpsters and containers are to be covered and emptied regularly.

Waste is to be disposed of properly in accordance with local, state, and/or federal regulations.

Rev. June 26, 2026 31 25 00 - 4 Erosion and Sediment Control

4. Portable toilets are to be installed and cleaned regularly with their contents properly disposed of. They are to be secured in place so they will not be knocked over by construction activities.

5. Building materials are to be properly stored and contained on-site to prevent contamination of site stormwater runoff.

6. Oil and fuel containers are to have appropriate secondary containment. If total oil storage on-site exceeds a cumulative total of 1,320-gallons, a spill prevention control and countermeasure (SPCC) plan shall to be prepared by the Contractor and maintained on-site.

3.04 MAINTENANCE

A. The following procedures shall be utilized to maintain the effectiveness of the erosion and sediment control measures during construction:

1. Clean, repair, and/or replace compost filter socks, construction entrances, and temporary crossings as necessary.

2. Clean and/or sweep affected roadways daily, or more frequently if otherwise required by the Owner, Engineer, or Pennsylvania Department of Transportation (PennDOT).

3. Regrade and re-seed any vegetated areas which have eroded. Re-apply mulch or stabilization matting as needed.

4. Remove debris and litter on a weekly basis or more frequently if necessary.

5. Observe equipment/vehicles within the work area, particularly for identification of vehicles leaking petroleum products that could enter stormwater drainage facilities.

3.05 INSPECTION DURING CONSTRUCTION

A. The Contractor will be responsible to provide a qualified inspector to inspect the installed erosion and sediment control measures and disturbed areas of the construction site for compliance with the E&S Plan. These inspections are to be completed at least once every seven calendar days and after each runoff event.

3.06 NON-STORMWATER DISCHARGES

A. The following preventative measures shall be employed by the Contractor to minimize non-stormwater discharges associated with the construction activity entering Site stormwater facilities:

1. Cleaning water for construction vehicles and equipment and ground water encountered within excavations shall not be discharged directly to storm drains or adjacent surface waters. Chemicals and detergents are not to be used.

2. The Contractor is responsible for identifying areas on-site for construction vehicle transit (i.e., haul roads, Contractor trailers and parking areas, etc.) or equipment staging, which are to be visually inspected and where runoff can be controlled.

3. Water used for dust control measures is to be applied using proper quantities and equipment. No chemical additives are to be used.

Rev. June 26, 2026 31 25 00 - 5 Erosion and Sediment Control

3.07 SPILL PREVENTION AND CONTROL

A. Spills of petroleum, toxins, or hazardous material are to be reported to the appropriate State or local government agencies immediately, regardless of size.

B. The following material management practices shall be used by the Contractor to reduce the risk of spills or other accidental exposure of materials and substances to stormwater runoff during construction.

1. Materials with potential for spillage, stored on-site, are to be stored in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure.

2. Products are to be kept in their original containers with the original manufacturer's label.

3. Substances are not to be mixed with one another unless recommended by the manufacturer.

4. Whenever possible, product is to be used up or packages resealed before proper disposal of contents and containers off-site.

5. Manufacturers' recommendations for proper use and disposal are to be followed.

6. Inspection is to be made by the Contractor for proper use and disposal of materials during periodic inspections and recorded on the Inspection Report Form.

7. On-site vehicles are to be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage of petroleum products. Petroleum products are to be stored in closed containers that are clearly labeled. Used oils are to be disposed of properly.

8. Materials are to be brought on-site in quantities that limit or minimize the amount of on-site storage.

9. Containers are to be tightly sealed and properly stored when not required for use.

Excess paint, solvents, etc. shall not be discharged to the storm sewer facilities or waterways but are to be properly disposed of according to manufacturers' instructions, or State and local regulations.

C. Manufacturers' recommended methods for spill cleanup are to be clearly posted and site personnel are to be made aware of the procedures and the location of the information and cleanup supplies.

D. Materials and equipment necessary for spill cleanup are to be kept in designated material storage areas on-site. Equipment and materials are to include but not be limited to brooms, dust pans, mops, rags, gloves, goggles, spill control materials, sand, sawdust, and trash containers specifically for this purpose.

E. Spills are to be cleaned up immediately after discovery.

F. The spill area is to be kept well ventilated and personnel are to wear appropriate protective clothing to prevent injury from contact with a hazardous substance.

G. A spill report is to be completed and filed with the Owner, Engineer and PADEP and is to include a description of the spill, what caused it, and the corrective actions taken.

Rev. June 26, 2026 31 37 00 - 1 Riprap

SECTION 31 37 00

RIPRAP

ARTICLE 1�GENERAL

1.01 SUMMARY

A. This Section includes relocation of stone material from the dam to the creek banks and any supplemental riprap, if necessary.

B. The work shall consist of furnishing and placing riprap at the locations and to the dimension shown on the Contract Drawings.

1.02 REFERENCES

A. Comply with the following codes, standards and specifications, except where more stringent requirements have been specified herein:

1. American Society for Testing and Materials (ASTM)

a. ASTM C127 Test Method for Specific Gravity and Absorption of Coarse Aggregate

b. ASTM C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates

c. ASTM C535 Test Method for Resistance to Degradation of Large-Size Coarse

Aggregate by Abrasion and Impact in the Los Angeles Machine

d. ASTM C702 Practice for Reducing Samples of Aggregate to Testing Size

e. ASTM D422 Test Method for Particle-Size Analysis of Soils

B. Erosion and Sediment Pollution Control Program Manual (E&S Manual), Pennsylvania

Department of Environmental Protection (PADEP) Technical Guidance Number 363-2134-

008, March 2012 or latest edition.

C. Construction Specifications, Pennsylvania Department of Transportation, Publication

408/2011, Latest Edition.

D. Aggregate Producers - Bulletin 14 (Bulletin 14), Pennsylvania Department of Transportation, Publication 34, Latest Edition.

E. Test for soundness shall be performed according to the procedure for ledge rock in Federal

Specification SS-R-406C, Method 203.01.

1.03 SUBMITTALS

A. Submit the following in accordance with the General Conditions/General Requirements, only for supplemental riprap, if used:

1. Source of Material (name and location).

2. Material Certifications.

1.04 QUALITY ASSURANCE

A. All riprap shall be obtained from a single off-site quarry listed in PennDOT Bulletin 14.

Rev. June 26, 2026 31 37 00 - 2 Riprap

B. All testing, including field and laboratory services, required to document compliance with these specifications shall be performed at the Contractor's sole expense.

C. The Contractor shall arrange for the Engineer to have entry to any quarry furnishing riprap under this Contract upon request.

ARTICLE 2�PRODUCTS

2.01 GENERAL PROPERTIES

A. Except as provided, the rock shall have the following properties:

1. Bulk specific gravity (bulk-saturated, surface-dry basis): Not less than 2.5.

2. Absorption: Not greater than 2 percent.

3. Soundness: Weight loss in five cycles not greater than 10 percent when sodium sulfate is used and 15 percent when magnesium sulfate is used.

4. Abrasion: Weight loss after 500 revolutions not greater than 25 percent using Los

Angeles Machine Grading 1.

2.02 MATERIAL

A. Riprap shall be obtained from a single off-site quarry. Individual rock fragments shall be dense, sound and free from cracks, seams and other defects conducive to accelerated weathering. Riprap shall be free from foreign materials such as quarry dust, shale, soil and organic material.

B. Riprap shall be well graded angular rock that conforms to the gradation requirements in the table below. Riprap shall consist of rock fragments of approximately equal dimensions in all directions. No piece should have a length exceeding three (3) times its width or depth. Long flat pieces may be rejected by the Engineer.

C. Rock that fails to meet the requirements stated in 2.01.A may be accepted only if similar rock from the same source has been demonstrated to be sound after five years or more of service under conditions of weather, wetting and drying and erosive forces similar to those anticipated for the rock to be installed under this specification.

Rev. June 26, 2026 31 37 00 - 3 Riprap

Table 2.2.1: Riprap Size and Gradation - Percent Passing (Square Openings)

Adapted from PennDOT Publication 408, Section 850

Rock Size (inches) R-5

18 100*

9 15 � 50

4 0 - 15

* Maximum allowable rock size

ARTICLE 3�EXECUTION

3.01 PLACEMENT

A. Riprap and relocated stone material from the dam shall be placed in the locations and to the dimensions, lines and grades indicated on the Contract Drawings. Material shall be graded in such a manner that large rock fragments are uniformly distributed and smaller fragments fill the spaces between larger fragments to create a compact uniform layer.

B. Riprap shall be placed in one full course thickness in one operation in a manner to prevent segregation and to avoid displacement of underlying material. Do not place rock in layers, by dumping into chutes, or by similar methods likely to cause segregation. The maximum drop height when placing riprap shall be 12 inches.

C. Placement of riprap shall be made without disturbance of the underlying stone filter, geotextile layer, or subgrade. Any displacement or damage to the stone or geotextile filter layer shall require removal of the riprap and repair of the filter layer at the Contractor's expense.

3.02 FIELD QUALITY CONTROL

A. The Contractor shall be responsible for ensuring that the finished surface of the riprap conforms to the design lines and grades indicated on the Contract Drawings. The specified depth of riprap may be exceeded in localized areas, provided that the overall finished grade is consistent with the design grades, but in no case shall the depth of riprap be less than the specified depth.

B. All riprap delivered to the project site may be subject to laboratory testing for conformance with these specifications upon written direction of the Engineer.

C. Acceptance of gradation will be based upon visual observation by the Engineer and certification by the quarry.

Rev. June 26, 2026 32 01 00 91 - 1 Site Restoration

SECTION 32 01 00.91

SITE RESTORATION

ARTICLE 1�GENERAL

1.01 SUMMARY

A. This Section includes the restoration and maintenance of all types of surfaces, driveways, sidewalks, curbs, gutters, culverts, fences and other features disturbed, damaged or destroyed during the performance of the Work or as a result of the operations of the

Contract.

B. The quality of materials and performance of the work used in the restoration shall produce a surface or features equal to the condition of each before the work began.

1.02 SUBMITTALS

A. No submittals are required.

1.03 MEASUREMENT FOR PAYMENT

A. Payment for Site Restoration shall be on a lump sum basis according to the Contractor's bid price.

ARTICLE 2�PRODUCTS

Not Used

ARTICLE 3�EXECUTION

3.01 GENERAL

A. The replacement of surfaces at any time, as scheduled or directed, shall not relieve the

Contractor of responsibility to repair damages by settlement or other failures.

B. All paved areas shall be swept or washed to remove dirt, sediment or dust. Any signs, fences, utility markers, property corners, etc. that were relocated or removed by the Contractor shall be replaced in kind.

3.02 STONE OR GRAVEL PAVEMENT

A. All pavement or driveways surfaced with stone or gravel shall be replaced in kind with suitable PennDOT aggregate subbase.

B. New aggregate shall be placed to match the depth of gravel in place prior to the work and shall be compacted to provide a driving surface comparable to the surface condition before the work began.

C. The surface of the restored road or driveway shall match the existing width, lines and grades of the area prior to the work.

3.03 ASPHALT PAVEMENT

A. Permanent asphalt pavement to be restored shall be replaced with bituminous materials of the same depth and kind as the existing materials unless otherwise specified.

Rev. June 26, 2026 32 01 00 91 - 2 Site Restoration

B. Prior to placement of any bituminous pavement material, a tack coat shall be applied to the edges of the existing pavement and other features.

C. The furnishing, handling, installation and compaction of all bituminous pavement materials shall be in accordance with PennDOT Standards and Specifications.

3.04 OTHER TYPES OF RESTORATION

A. The wooden split-rail fence at the entrance to the access to the work area, at the contactor laydown area, shall be removed and replaced in kind following project completion. The chainlink fence, if required to be removed for construction, will not be replaced.

B. Trees, shrubs and landscape items damaged or destroyed as a result of the construction operations shall be replaced in kind with like species and size. All planting and care thereof shall meet the standards of the American Nursery and Landscaper Association.

C. Swales or other watercourses shall be reshaped to the original grade and cross-section and all debris removed. Where necessary to prevent erosion, the bottom and sides of the watercourse shall be protected.

D. Storm sewers or culverts damaged or removed as the result of the construction operations shall be replaced with like size and material and shall be replaced at the original location and grade. Storm sewers and culverts shall be cleaned of any sediment or debris.

E. Site fencing or gates damaged or removed during construction shall be replaced in kind with like material at the original locations.

F. Property corners or monuments disturbed or removed during construction shall be replaced by a professional land surveyor licensed in the State of Pennsylvania. The surveyor shall provide a plan showing the property boundary and indicating all property corners re-set as part of this work.

Rev. June 26, 2026 32 93 13 - 1 Topsoil and Seeding

SECTION 32 93 13

TOPSOIL AND SEEDING

ARTICLE 1�GENERAL

1.01 SUMMARY

A. This Section includes topsoil, fertilizer, seed, mulch anchorage, and associated work.

B. Topsoil is not required unless areas requiring seeding are unsuitable for supporting vegetative cover. Topsoil shall only be used in areas outside of the existing impoundment.

1.02 REFERENCES

A. Comply with the latest revision of the following codes, standards and specifications, except where more stringent requirements have been specified herein:

1. Erosion and Sediment Pollution Control Program Manual (E&S Manual), Pennsylvania

Department of Environmental Protection (PADEP) Technical Guidance Number 363-

2134-008, March 2012 or latest edition.

2. Erosion Control and Conservation Plantings on Noncropland, The Pennsylvania State

University, 1997.

3. Construction Specifications, Pennsylvania Department of Transportation (PennDOT)

Publication 408/2011, Latest edition.

1.03 COORDINATION REQUIREMENTS

A. Coordinate topsoil and seeding with project requirements and the Erosion and Sediment

Control Plan and Sediment Management Plan requirements, as appropriate.

1.04 SUBMITTALS

A. Submit the following in accordance with the General Provisions.

1. The location of source and data for off-site topsoil, if utilized.

2. Analysis of the seed.

3. Certification that each container complies with the Pennsylvania Seed Act 164 of 2004

(and amendments) and Pennsylvania Department of Agriculture requirements.

4. Hydroseeder data including material and application rates, if applicable.

ARTICLE 2�PRODUCTS

2.01 MATERIALS

A. Topsoil

1. Topsoil shall be unfrozen, friable clayey loam free from clay lumps, stones, roots, sticks, stumps, brush or foreign objects and containing not less than 2.0% nor more than 10.0% organic matter, as determined according to AASHTO T 194.

2. All stones and rocks larger than 1/4-inch diameter shall be removed from topsoil prior to placement.

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B. Fertilizer

1. Fertilizer shall be a standard quality commercial carrier of available plant food elements.

Fertilizer shall be a complete prepared and packaged material containing a minimum of

10 percent nitrogen, 10 percent phosphoric acid and 20 percent potash (10-10-20).

2. Each bag of fertilizer shall bear the manufacturer's guaranteed statement of analysis.

C. Agricultural Lime

1. Agricultural lime shall consist of pulverized agricultural limestone consisting of an 89% calcium carbonate equivalent by mass, meeting the gradation requirements of PennDOT

Publication 408.

D. Seed Mixtures

1. Seed mixtures shall be of commercial stock of the current season's crop and shall be delivered in unopened containers bearing the guaranteed analysis of the mix.

2. All seed shall meet the State standards of germination and purity.

3. Seed mixtures shall be as indicated on the Contract Drawings.

E. Mulch shall be stalks of oats, wheat, rye or other approved crops which are free from noxious weeds.

ARTICLE 3�EXECUTION

3.01 INSTALLATION

A. The areas to receive topsoil shall be graded to a depth of not less than 4 inches or as specified, below the proposed finished surface. If the depth of topsoil existing prior to construction was greater than 4 inches, the topsoil shall be replaced not less than the greater depth.

1. All debris and inorganic material shall be removed and the surface loosened for a depth of 2 inches prior to the placing of the topsoil.

2. The topsoil shall not be placed until the subgrade is in suitable condition and shall be free of excessive moisture and frost.

B. Satisfactory topsoil shall be placed on the prepared subgrade to the depth required.

1. All topsoil shall be free from stones, roots, sticks and other foreign substances and shall not be placed in a frozen or muddy condition.

2. The finished surface shall conform to the lines and grades of the area before disturbed or as shown on the Contract Drawings. Any irregularities shall be corrected before the placement of fertilizer and seed.

C. Topsoiling, fertilizing and liming are not required on the former lake bottom areas.

D. It is recommended that the Contractor perform site specific soils testing to determine the appropriate application rates of agricultural lime and fertilizer. In the absence of site specific soils test results, agricultural lime shall be applied uniformly at the rate of 240 pounds per

1,000 square feet (6 tons per acre) and 10-10-20 fertilizer shall be applied uniformly at the rate of 25 pounds per 1,000 square feet (1,000 pounds per acre).

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1. Following the application of the lime and fertilizer and prior to application of the seed, the topsoil shall be scarified to a depth of at least 2 inches with a disc or other suitable method traveling across the slope if possible.

E. When the topsoil surface has been fine graded, the seed mixture shall be uniformly applied upon the prepared surface with a mechanical spreader at a rate of not less than 10 pounds per 1000 square feet.

1. The seed shall be raked lightly into the surface and rolled with a light hand lawn roller.

2. Seeding and mulching shall not be done during windy weather.

F. The mulch shall be hand or machine spread to form a continuous blanket over the seed bed, approximately 2 inches uniform thickness at loose measurement. Excessive amounts or bunching of mulch will not be permitted.

1. Mulch shall be anchored by an acceptable method.

2. Unless otherwise specified, mulch shall be left in place and allowed to decay.

3. Mulch may be replaced by rolled erosion control matting as indicated on the approved erosion and sediment control plan and Contract Drawings.

G. Seeded areas shall be watered as often as required to obtain germination and to obtain and maintain a satisfactory sod growth. Watering shall be in such a manner as to prevent washing out of seed.

H. Hydroseeding may be accepted as an alternative method of applying fertilizer, seed and mulch. The Contractor shall submit all data regarding materials and application rates to the

Engineer for review.

3.02 MAINTENANCE

A. Vegetative cover established as part of this project does not require mowing, unless necessary to facilitate construction activities.

B. The Contractor shall be responsible for the repair of settlement or damage including re-soiling, re-seeding and re-mulching as needed until substantial completion of the project.