APA_Rehabilitate Taxiways C and D_Addendum Two.pdf

CENTENNIAL AIRPORT

AIP 3-08-0029-061-2024, 0XX-2025, 0XX-2026

REHABILITATE TAXIWAYS C AND D

ADDENDUM NUMBER TWO

AIP 3-08-0029-061-2024, 0XX-2025, 0XX-2026

REHABILITATE TAXIWAYS C AND D

March 21, 2024

GENERAL

1. An updated electronic proposal form titled Addendum #2 has been uploaded to the bidnet website. Please only use this form for bidding.

2. Update prebid sign-in attendee Cory Allington / Capital / 970-310-4209 / callington@capitalteams.com.

CONTRACTOR QUESTIONS

1. Question: Are sandbags required on the lighted barricades if the barricades are connected end to end?

Response: Yes, sandbags are required.

2. Question: The documents state to utilize Borrow Embankment from the ARFF staging area, please confirm that this material meets the requirements of P-154 and will not need to be modified to meet specifications?

Response: P-154 shall be used for all fill under the Taxiway S3 pavement section. See Sheet TD-

C301 Detail 4, notes 1 and 2. Subgrade under P-154 shall be compacted to meet P-152 prior to placement of P-154 Subbase. Any fill outside of the pavement section shall meet the standards outlined in P-152. Fill will be obtained from suitable excess waste stockpiled on site from ARFF millings pad excavation, Taxilane C2 cut, waste from millings cut areas other than topsoil/organic material.

3. Question: It appears per detail 4 on Sheet TC-C301, that the P-101-5.9 pay item is to include the milling of the patching areas only, and that replacement of the P-401 will be paid under separate

P-401 pay items. Is this correct?

Response: Yes, that is correct.

4. Question: Sheets TC-CD102 & TC-CD103 call out the P-101 Full Depth Reconstruction areas which appear to meet the total quantity for the project. Detail 7 on sheet TC-C301 indicates that this detail could be used for full depth repairs that are as narrow as 2ft, which will cause compaction issues with the replacement materials going back in. Please confirm that this Detail 7 is only intended to be used in larger areas as shown on sheets CD102-103 and is not intended to be used for replacement of narrow areas of subgrade and asphalt?

Response: See sheet TC-CD101 note 9 stating: “LIMITS OF FULL DEPTH PAVEMENT AND

SUBGRADE REPAIR SHALL BE FIELD LOCATED BY THE RPR. LIMITS SHOWN

SUBJECT TO CHANGE.” Detail 7 on sheet TC-C301 shall be updated to show 10 feet width for the full depth reconstruction.

5. Question: It appears as though the Waste Excavation Items (Stockpile on Site) & (Haul Off-Site) encompass all of the earthwork that will need to be hauled on the project. This would include

Unclassified Excavation, Subgrade Mitigation (Unstable Material), and any Pipe Spoils. This would mean that there would be no haul of material included in these other items, please clarify if this is correct?

Response: Waste excavation only includes the haul of material for P-152 specification requirements. All other items including pipes, headwalls, and conduit, the haul of material is considered incidental to the respective items. See method of measurement and basis of payment in the respective specifications.

6. Question: What is the approach of awarding the contract? Will it be based off the apparent low bidder for the entire bid and then choose Schedules to be officially awarded?

Response: Not all federal schedules of work may be awarded. As stated in the Contract

Documents “The Contract will be awarded to the lowest qualified and deemed responsive bidder on the Federally eligible schedules of work awarded (Schedules I, II, III, IV, and VI).”

7. Question: Based off the answer to Question 9 from Addendum #1 regarding the location of the

Control Strip – it is to be assumed that the control strip is to be performed in the 2” mill/overlay section. Per spec, “the control strip shall be placed in two lanes of the same width and depth to be used in production with a longitudinal cold joint.” With the 2” mill/overlay section being 7.5’ wide (Schedule V – Non-Federal), there isn’t room to provide two equal lanes. It would be beneficial for the Owner to perform the control strip in a wider area in order to fulfill the spec requirements.

Response: The control strip will be two equal lane widths meeting the tonnage requirements as specified in P-401, a minimum of 250 tons. It is anticipated the lanes will be 12.5 feet wide, unless the Contractor proposes a different lane width for production. As stated in Addendum #1, the control strip will occur on the northern limits of the project and exceeding the project limits but including the 7.5’ non-federal area. However, the final location of the control strip will be determined by the Airport prior to construction. Example of anticipated northern limits shown below.

8. Question: At the pre-bid it was mentioned that raising the profile of Taxiway D would get paid for under Schedule I for future construction of S3. However, in the Addendum it states the quantity to raise the profile is in Schedule II. It would be beneficial to the Owner for the profile of

Taxiway D to be raised while it is being reconstructed to provide a good quality end product.

Response: At the pre-bid, it was misspoken that the quantities for raising Taxiway D profile was in Schedule I. This was rectified in Addendum #1. For the purposes of bidding, raising the profile of Taxiway D and all items associated with raising the profile is in Schedule II.

9. Question: Can the allocated Calendar Days roll-over from one phase to the next? For example, if it takes the Contractor 10 calendar days to finish Phase 1, can the Contractor utilize the remaining

5 calendar days in Phase 2 (making it 25 calendar days for Phase 2)?

Response: No, the construction schedule is based on maximum calendar days per phase. If the

Contractor completes a phase early, they will be permitted to move on to the next phase as coordinated with the Airport. No additional calendar days will be granted to any phase.

10. Question: Will there be any runway/taxiway pavement sensors that will be installed?

Response: No there are not any pavement sensors as part of this project.

11. Question: The contractor who submits the lowest price for all work (federal and non-federal) will be the contractor that gets awarded some or all Schedules?

Response: The contract will be awarded to the lowest qualified bidder for the federal schedules of work awarded. Schedules awarded will be based on funding. It is not guaranteed all schedules will be awarded.

12. Question: What is the intent of construction markers? Can the environmental permit be provided or detail?

Response: Construction markers are an alternative to construction fencing. See Sheet 123 of 146

(Arapahoe County Requirements) and Sheet 135 of 146 (Douglas County Requirements).

13. Question: Can you please provide a detail for the Stabilized Staging Areas? Can the environmental permit be provided?

Response: Stabilized Staging Area detail is provided on Sheet 126 of 146 (Arapahoe County

Requirements) and Sheet 143 of 146 (Douglas County Requirements). Project number for County

Permitting is located on the GESC plans. Contractor is responsible for obtaining necessary permits required by the county prior to construction. Anticipated permits to be provided by the

Contractor include but are not limited to the following: Access Permit, Stormwater Public

Improvement Permit, GESC Permit (Arapahoe County and Douglas County), Floodplain

Development Permit, and Construction Permit (Douglas County).

14. Question: The scales on several pages contradict each other. For example, the scale on Sheets 57-

61 state that 1”-30’. However, when you calibrate against this scale, ½” gives you 30’. This is also true in the GESC Drawings among others. Please clarify.

Response: The drawings are printed as half size plans (11x17); therefore, the scales are half the size.

15. Question: If Schedule IV gets awarded, will the planes be relocated to allow for safe construction activities to occur?

Response: Yes, the planes will be relocated prior to the start of construction through coordination with the Airport.

16. Question: The P-401 control strip needs to be constructed prior to shutting down RW 10/28

(Phase 1). Will this work count towards the allocated Phase 1 Calendar Days?

Response: No, this work will not count towards the allocated Phase 1 Calendar Days. As stated in

Note 1 on sheet GC001 “THE CONTROL STRIP FOR P-401 SHALL BE CONSTRUCTED BY

THE CONTRACTOR AND APPROVED BY THE RPR A MINIMUM OF 2 DAYS PRIOR TO

THE START OF PHASE 1 AND THE CLOSING OF RUNWAY 10/28.”

17. Question: There is approx. 4,400 SY of GSB-88 over millings (P-608 spec), and approx. 14,400

SY of GSB-78 (P608-R spec). Can the P-608 specifications be utilized for the entire project?

Response: No, P-608R is required on Taxiway C due to reduced cure time to minimize the closure at Willowbrook Hangars.

18. Question: Will there be quality assurance survey or will the contractor’s surveyor be the surveyor of record?

Response: Jacobs survey team will be available if questions arise by QC surveyor and survey verification. The Contractor's QC survey will be final survey on record for the project to complete as-built survey, survey verification, and fulfill the AGIS requirements.

19. Question: If the milled surface is delaminated after milling will additional asphalt be paid for as needed to construct to grade?

Response: Yes, additional asphalt shall be paid for as P-401.

20. Question: A stabilized staging area is called out to be placed for the Taxiway C staging area. This area already consists of millings, will the contractor have to remove the millings to place the 3” minimum gravel per the stabilized staging area detail?

Response: No, the millings shall remain in place. An alternative vehicle tracking control detail was added to sheet GESC504 for use.

21. Question: Can millings be used to stabilize the staging areas instead of gravel?

Response: Yes, millings may be used to construct the stabilized staging area.

22. Question: What depth of patching should be assumed? The note says to mill in 2” increments so is it 2 inches? Assuming we had a 100 SY patch, 6” deep would we bill for 300 SY?

Response: Yes, depth of patching shall be in 2” increments.

23. Question: Will the excavation for the milling placement be paid under Waste Excavation

(stockpile on site)?

Response: Yes.

24. Question: How were the embankment quantities determined? Can a summary be provided?

Response: Excavation and embankment quantities are summarized below. Stripping of topsoil was quantified separately prior to quantifying cut/fill. The Proposal Form has been updated under this Addendum #2 to update earthwork quantities to reflect the summary below. The below quantities are design raw quantities and do not include contingency or rounding. The Contractor will be paid as outlined in P-152 Method of Measurement and Basis of Payment for actual earthwork performed.

25. Question: Cores indicate the existing pavement depth is 17.4” in the full depth removal area on

TW C, will this be filled with borrow embankment to P-209 subgrade? What is the purpose of the full depth removal in this area?

Response: Full depth removal on Taxiway C is for subgrade mitigation. Material to fill this full depth removal will be 50/50 CDOT Class 6 backfill mixed with native material according to the

P-152 specification for subgrade mitigation.

26. Question: What is the intent of the bid item “Waste Excavation (Stockpile On-Site)” and “Waste

Excavation (Haul Off-Site)” in Schedule I? Is this the hauling of the material you excavate in the

Unclassified Excavation bid item? Outside of that and the Subgrade Mitigation, there is no additional excavation required for Schedule I. Please clarify.

Response: Waste Excavation (Stockpile On-Site) shall be considered suitable material, as approved by the RPR, to be used as borrow embankment. Waste Excavation (Haul Off-Site) shall be considered unsuitable material, such as excess topsoil, and shall be disposed of off Airport property.

27. Question: We have been unable to find any requirements in the documents concerning badging employees or permitting vehicles, if there are requirements to badge employees or permit vehicles can they be added to a future addendum so that contractors are bidding correctly?

Response: The Airport does not require badging of employees or permitting of vehicles. The

Contractor and Subcontractors will receive a safety briefing at the beginning of the project from the Airport (typically during the preconstruction meeting). The Contractor will be required to sign the safety plan presented by the Airport stating compliance and understanding. The Contractor will take responsibility of all Subcontractors. See Vehicle and Pedestrian Operations in the

Construction Safety and Phasing Plan in the back of the project bidding documents. Additionally, the Airport Special Provisions in the contract documents outlines Airport Security and other

Airport specific requirements.

CONTRACT DRAWINGS

1. PLAN SHEET: TC-C301 TAXIWAY C TYPICAL SECTIONS

REPLACE Drawing TC-C301 dated February 28, 2024, with Drawing TC-C301 dated March 21, 2024. Modify Detail 7 to show 10 feet width for the full depth reconstruction.

2. PLAN SHEET: AF-CS101 ARFF TRAINING MILLINGS PAD EXPANSION

REPLACE Drawing AF-CS101 dated February 28, 2024, with Drawing AF-CS101 dated March

21, 2024. Add callout stating, “INSTALL 2-IN NEOPRENE GASKET BETWEEN THE

RESTRICTOR PLATE AND THE OUTLET STRUCTURE.” to Detail A.

3. PLAN SHEET: VR-CS501 SOUTH VSR DRAINAGE DETAILS

REPLACE Drawing VR-CS501 dated February 28, 2024, with Drawing VR-CS501 dated March

21, 2024. Replace Detail 2 for Pipe Collar Detail with Douglas County Detail SP.60a for Pipe

Connection Detail to Existing Pipe.

4. PLAN SHEET: GESC504 GESC STANDARD NOTES AND DETAILS

REPLACE Drawing GESC504 dated February 28, 2024, with Drawing GESC504 dated March

21, 2024. Add detail for alternative vehicle tracking control.

5. PLAN SHEET: GESC101-DC GESC INITIAL-INTERIM PLAN – ARFF PAD – ARFF

MILLINGS EXPANSION

REPLACE Drawing GESC101-DC dated February 28, 2024, with Drawing GESC101-DC dated

March 21, 2024. Add callout stating, “INSTALL 2-IN NEOPRENE GASKET BETWEEN THE

RESTRICTOR PLATE AND THE OUTLET STRUCTURE.” to Detail A.

Total Pages of Addendum Number Two with Enclosures – 11 pages and a revised Addendum Two

Proposal Form excel spreadsheet.

Your acknowledgment that these clarifications/revisions have been incorporated must be noted in the

PROPOSAL submitted with your bid.

END OF ADDENDUM NUMBER TWO

TYPICAL SECTION NOTES:

1. SURVEY WILL BE REQUIRED BEFORE AND

AFTER EACH LIFT OF P-401 AT THE POINTS

SHOWN ON THE PAVING PLANS.

2. TOP LIFT SHALL BE A MIN 2-INCH.

1 TAXIWAY C (FEDERAL) TYPICAL SECTION

NTS

NOTE:

1. CRACKS SHALL BE FIELD LOCATED BY THE RPR.

CLEAN CRACK AND FILL

WITH FINES PER ITEM P-101

TACK BETWEEN LIFTS AND

MILLED SURFACE (P-603)

EXISTING ASPHALT TO

REMAIN (DEPTH VARIES)

6 THAN 1/2" WIDE BUT LESS THAN 2" WIDE AFTER MILL

NTS

NOTE:

1. CRACKS SHALL BE FIELD LOCATED BY THE RPR.

TYPE 2 CRACK REPAIR - CRACKS GREATER

TACK BETWEEN LIFTS AND

MILLED SURFACE (P-603)

EXISTING ASPHALT TO

REMAIN (DEPTH VARIES)

PAVEMENT REINFORCING GRID

PER P-101 (INCIDENTAL TO TYPE 2

CRACK REPAIR)

EXISTING ASPHALT (TYP)

(DEPTH VARIES)

PAVEMENT REINFORCING GRID

PER P-101 (INCIDENTAL TO FULL-DEPTH

PAVEMENT REPAIR)

TACK COAT (P-603) ALL FACES (TYP)

AND BETWEEN LIFTS

7 AND SUBGRADE MITIGATION DETAIL

NTS

SAW CUT OR MILL AND CLEAN FULL DEPTH

AFTER VARIABLE DEPTH MILL. REPLACE WITH

ASPHALT COURSE (P-401), IN MAXIMUM 3-INCH LIFTS.

NOTES:

1. LOCATIONS OF FULL-DEPTH PAVEMENT REPAIR

SHALL BE FIELD LOCATED BY THE RPR.

2. IT IS REQUIRED THAT ALL ASPHALT IN THIS SECTION

BE PAVED WITH A PAVER IN A SINGLE LANE.

3. ASPHALT PLACED BELOW FINAL SURFACE MUST

MEET IN-PLACE DENSITY TESTING. ASPHALT PLACED

WITHIN FULL-DEPTH PAVEMENT REPAIR LIMITS

SHALL BE PAID FOR UNDER P-401.

4. REMOVAL OF PAVEMENT WITHIN FULL DEPTH

PAVEMENT REPAIR SHALL BE PAID FOR UNDER "FULL

DEPTH PAVEMENT REMOVAL."

5. AREAS TO BE MITIGATED WILL BE OVER EXCAVATED

1 TO 3 FEET, AS DETERMINED BY THE RPR. PAYMENT

SHALL BE MADE PER P-152. MATERIAL SHALL BE

PLACED AND COMPACTED IN 6-INCH LIFTS.

2-INCH DEPTH MILL MINIMUM OF 12-INCH WIDE ON ALL

SIDES OF FULL-DEPTH PAVEMENT

REPAIR AREA PER P-101 (INCIDENTAL TO

FULL-DEPTH PAVEMENT REPAIR)

DETAIL MILL MINIMUM OF 12-INCH ON ALL SIDES OF CRACK

TO A DEPTH DETERMINED BY THE RPR PER P-101

(INCIDENTAL TO TYPE 2 CRACK REPAIR)

5 LESS THAN 1/2" WIDE AFTER MILL

NTS

TYPE 1 CRACK REPAIR - CRACKS

EXISTING ASPHALT TO

REMAIN (DEPTH VARIES)

TACK COAT BETWEEN LIFTS

AND MILLED SURFACE (P-603)

P-152 SUBGRADE MITIGATION,

50/50 CDOT CLASS 6 BACKFILL

MIXED WITH NATIVE MATERIAL,

SEE NOTE 5

TRIAXIAL OR BIAXIAL EXTRUDED

GEOGRID (INCIDENTAL TO

SUBGRADE MITIGATION)

TACK COAT BETWEEN LIFTS AND MILLED

SURFACE (P-603)

3 T-CAP CONNECTION TO EXISTING ASPHALT

NTS

EXISTING

ASPHALT

5'

NEW PAVEMENT EXISTING PAVEMENT

T-CAP CONNECTION TO MATCH

THICKNESS OF TOP LIFT

(2-INCH DEPTH)

MILL EXISTING PAVEMENT TO A

DEPTH TO MATCH THICKNESS

OF TOP LIFT. VERTICAL SAWCUT

EDGE. PAVE NEW SURFACE

COURSE IN ONE CONTINUOUS

LIFT. PROTECT EXISTING

PAVEMENT TO REMAIN.

ASPHALT COURSE

(P-401)

4 PATCHING

NTS

NOTES:

1. ADDITIONAL MILLING NEEDED AFTER INITIAL 4-INCH MILL TO REMOVE LOOSE,

DELAMINATED MATERIAL OR AS DIRECTED BY THE RPR, WILL BE PAID FOR UNDER

P-101 PATCHING. AREA SHALL BE MILLED IN 2-INCH LIFTS AND SHALL BE FIELD

LOCATED BY THE RPR.

EXISTING ASPHALT TO

REMAIN (DEPTH VARIES)

LOOSE OR DELAMINATED ASPHALT

FULL-DEPTH PAVEMENT REMOVAL

EXISTING ASPHALT TO

REMAIN (DEPTH VARIES)

TACK COAT BETWEEN LIFTS

AND MILLED SURFACE (P-603)

2 TAXIWAY C (NON-FEDERAL) TYPICAL SECTION

NTS

TACK BETWEEN LIFTS AND

MILLED SURFACE (P-603)

TACK BETWEEN LIFTS AND

MILLED SURFACE (P-603)

NOTE:

1. THE CONTRACTOR IS REQUIRED TO VARIABLE DEPTH MILL THE EXISTING ASPHALT

SURFACE TO ALLOW FOR A MINIMUM OF 4-INCH P-401 TO PROPOSED ELEVATIONS

SHOWN ON THE PAVING PLANS.

2. FABRIC MAY BE ENCOUNTERED AT APPROXIMATELY 4-INCH DEPTH. THE

CONTRACTOR SHALL MILL AN EXTRA 1/4-INCH (±) IN DEPTH TO REMOVE THE

EXISTING FABRIC. THIS WORK SHALL BE INCIDENTAL TO THE COST OF COLD MILLING

(4-INCH DEPTH) (P-101).

NOTE:

1. THE CONTRACTOR IS REQUIRED TO VARIABLE DEPTH MILL THE

EXISTING ASPHALT SURFACE TO ALLOW FOR A MINIMUM OF 2-INCH

P-401 TO PROPOSED ELEVATIONS SHOWN ON THE PAVING PLANS

2 LIFTS OF ASPHALT COURSE (P-401)

(OVERALL 4-INCH DEPTH)

ASPHALT COURSE (P-401)

(2-INCH DEPTH)

ASPHALT COURSE

(P-401) (MINIMUM 4-INCH DEPTH)

ASPHALT COURSE

(P-401)

ASPHALT COURSE

(P-401)

ASPHALT COURSE

(P-401)

FILL CRACK WITH SPECIFIED MATERIAL

PRIOR TO PLACEMENT OF GRID

12' MINIMUM (SEE

NOTE 2)

10' MINIMUM WIDTH

WITH TOTAL WIDTH

DETERMINED BY RPR

1'-3'

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SCALE: 1" = 20'

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NOTES:

1. EXISTING AND PROPOSED CONTOURS ARE SHOWN AT 1-FOOT

MINOR / 5-FOOT MAJOR INTERVALS.

2. GRADING WILL BE COMPLETED UP TO THE NEW PAVEMENT

EDGE AND TOPSOIL WILL THEN BE REPLACED TO FINAL GRADE

AND PAID FOR UNDER T-905 "TOPSOIL".

3. CONTOURS SHOWN OUTSIDE THE SURVEY TOPO LIMITS ARE

FOR REFERENCE ONLY AND SHALL NOT BE USED FOR ANY

VERTICAL DATA. CONTRACTOR TO SURVEY EXISTING

PAVEMENT PRIOR TO DEMOLITION AND PROVIDE TO RPR FOR

REVIEW AND UPDATES TO THE DESIGN, AS APPLICABLE.

LEGEND:

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PROPOSED MINOR CONTOUR

EXISTING MAJOR CONTOUR

EXISTING MINOR CONTOUR

GRADING LIMITS

GRADING BREAKLINE

SLOPE ARROWS

RIPRAP SWALE (D-701)

ASPHALT MILLINGS SWALE

ARFF MILLINGS PAD (P-101)

EXISTING RIPRAP SWALE

M

AT

C H

LI

N

E, S

EE

S

H

EE

T

AF

-C S1

10'-0"

B RIPRAP SWALE

NTS

TYPE L RIPRAP 18"

THICK (D-701)

DESIGN FLOW

DEPTH 0.7 FT

10'-0"

C ASPHALT MILLINGS SWALE

NTS

12" COMPACTED AND SEALED

(P-608) ASPHALT MILLINGS (P-101)

DESIGN FLOW

DEPTH 0.5 FT

3'-4"

1'-11"

4'-0"

2'-6"

3 SPA @ 10" = 2'-6"

5"5"

1'-6 12"

4 12" 1" x 58" SLOTTED

HOLE FOR 12" Ø TOP

ANCHORS

40"x23"x5

8" STEEL

RESTRICTOR

PLATE

EXISTING 15" RCP

POND OUTLET PIPE

BOTTOM OF PLATE

EL. 5822.85

EXISTING PIPE INVERT

EL. 5822.50

ANCHOR BOLT NOTES:

1. TOP ANCHORS: BOLT TZ SS304 (38" Ø x 2 34") OR

APPROVED EQUAL. MINIMUM FACTORED PULLOUT =

4.29 KIPS. ANCHORS SHALL BE INSTALLED IN

ACCORDANCE WITH THE MANUFACTURER'S WRITTEN

INSTRUCTIONS.

2. ALL HARDWARE SHALL BE STAINLESS STEEL, GR 304.

EXISTING POND

OUTLET STRUCTURE

FACE OF INSIDE

WALL

A POND RESTRICTOR PLATE

NTS

4 3 16"

6" FILTER

MATERIAL (D-701)

B

C

AF-CS103

COMPACTED SUBGRADE (P-152)

INSTALL 2-IN NEOPRENE GASKET BETWEEN

THE RESTRICTOR PLATE AND THE OUTLET

STRUCTURE.

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FEBRUARY 28, 2024

WXYA8401

3/19/2024 1:33 PMWXYA8401-VR-CS501

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PIPE TRENCH EXCAVATION

IN UNPAVED AREA DETAIL

NOT TO SCALE

3" 6"

1'-6" 1'-6"

1'-0"

INSIDE

DIAMETER

COMPACTED BACKFILL

MATERIAL (P-152)

BEDDING MATERIAL

(D-701)

FLOW LINE

COMPACTED BACKFILL

MATERIAL (P-152)

OR CLSM (P-153)

36" REINFORCED

CONCRETE PIPE (CLASS III)

STORM SEWER CENTERLINE

FINISHED OR EXISTING GRADE SURFACE

SLOPED TRENCH WALL

(SEE NOTE 1)

PIPE COLLAR DETAIL

NOT TO SCALE

1. ALL TRENCH EXCAVATIONS SHALL MEET OSHA STANDARDS.

2. BEDDING, BACKFILL, COMPACTION, CLSM, TOPSOIL, AND SEEDING FOR PIPES AND

STRUCTURES SHALL BE INCIDENTAL TO THE COST OF THE INSTALLATION OF THE STORM

SEWER PIPE OR STRUCTURE.

NOTES:

VEHICLE TRACKING CONTROL - ALTERNATE

B A

A

DC

B

C

D

A

TYPICAL ONE-LANE LAYOUT

ROADWAY

INSTALLATION:

1. THE SITE WHERE THE FODS TRACKOUT CONTROL SYSTEM IS

TO BE PLACED SHOULD CORRESPOND TO BEST MANAGEMENT

PRACTICES AS MUCH AS POSSIBLE. THE SITE WHERE FODS

TRACKOUT CONTROL SYSTEM IS PLACED SHOULD ALSO MEET OR

EXCEED THE LOCAL JURISDICTION OR STORM WATER POLLUTION

PREVENTION PLAN (SWPPP) REQUIREMENTS.

2. CALL FOR UTILITY LOCATES 3 BUSINESS DAYS IN ADVANCE OF

THE OF FODS TRACKOUT CONTROL SYSTEM INSTALLATION FOR THE

MARKING OF UNDERGROUND UTILITIES. CALL THE UTILITY

NOTIFICATION CENTER AT 811.

3. ONCE THE SITE IS ESTABLISHED WHERE FODS TRACKOUT

CONTROL SYSTEM IS TO BE PLACED, ANY EXCESSIVE UNEVEN

TERRAIN SHOULD BE LEVELED OUT OR REMOVED SUCH AS LARGE

ROCKS, LANDSCAPING MATERIALS, OR SUDDEN ABRUPT CHANGES

IN ELEVATION.

4. THE INDIVIDUAL MATS CAN START TO BE PLACED INTO

POSITION. THE FIRST MAT SHOULD BE PLACED NEXT TO THE

CLOSEST POINT OF EGRESS. THIS WILL ENSURE THAT THE VEHICLE

WILL EXIT STRAIGHT FROM THE SITE ONTO THE PAVED SURFACE.

8. AFTER THE FIRST MAT IS PLACED DOWN IN THE PROPER

LOCATION, MATS SHOULD BE ANCHORED TO PREVENT THE

POTENTIAL MOVEMENT WHILE THE ADJOINING MATS ARE

INSTALLED. ANCHORS SHOULD BE PLACED AT EVERY ANCHOR

POINT (IF FEASIBLE) TO HELP MAINTAIN THE MAT IN ITS CURRENT

POSITION.

9. AFTER THE FIRST MAT IS ANCHORED IN ITS PROPER PLACE,

AN H BRACKET SHOULD BE PLACED AT THE END OF THE FIRST MAT

BEFORE ANOTHER MAT IS PLACED ADJACENT TO THE FIRST MAT.

10. ONCE THE SECOND MAT IS PLACED ADJACENT TO THE FIRST

MAT, MAKE SURE THE H BRACKET IS CORRECTLY SITUATED

BETWEEN THE TWO MATS, AND SLIDE MATS TOGETHER.

11. NEXT THE CONNECTOR STRAPS SHOULD BE INSTALLED TO

CONNECT THE TWO MATS TOGETHER.

12. UPON PLACEMENT OF EACH NEW MAT IN THE SYSTEM, THAT

MAT SHOULD BE ANCHORED AT EVERY ANCHOR POINT TO HELP

STABILIZE THE MAT AND ENSURE THE SYSTEM IS CONTINUOUS

WITH NO GAPS IN BETWEEN THE MATS.

13. SUCCESSIVE MATS CAN THEN BE PLACED TO CREATE THE

FODS TRACKOUT CONTROL SYSTEM REPEATING THE ABOVE STEPS.

USE AND MAINTENANCE

1. VEHICLES SHOULD TRAVEL DOWN THE LENGTH OF THE

TRACKOUT CONTROL SYSTEM AND NOT CUT ACROSS THE MATS.

2. DRIVERS SHOULD TURN THE WHEEL OF THEIR VEHICLES SUCH

THAT THE VEHICLE WILL MAKE A SHALLOW S-TURN ROUTE DOWN

THE LENGTH OF THE FODS TRACKOUT CONTROL SYSTEM.

3. MATS SHOULD BE CLEANED ONCE THE VOIDS BETWEEN THE

PYRAMIDS BECOME FULL OF SEDIMENT. TYPICALLY THIS WILL NEED

TO BE PERFORMED WITHIN TWO WEEKS AFTER A STORM EVENT.

BRUSHING IS THE PREFERRED METHOD OF CLEANING, EITHER

MANUALLY OR MECHANICALLY.

4. THE USE OF ICE MELT, ROCK SALT, SNOW MELT, DE-ICER, ETC.

SHOULD BE UTILIZED AS NECESSARY DURING THE WINTER MONTHS

AND AFTER A SNOW EVENT TO PREVENT ICE BUILDUP.

REMOVAL

1. REMOVAL OF FODS TRACKOUT CONTROL SYSTEM IS REVERSE

ORDER OF INSTALLATION.

2. STARTING WITH THE LAST MAT, THE MAT THAT IS PLACED AT

THE INNERMOST POINT OF THE SITE OR THE MAT FURTHEST FROM

THE EXIT OR PAVED SURFACE SHOULD BE REMOVED FIRST.

3. THE ANCHORS SHOULD BE REMOVED.

4. THE CONNECTOR STRAPS SHOULD BE UNBOLTED AT ALL

LOCATIONS IN THE FODS TRACKOUT CONTROL SYSTEM.

5. STARTING WITH THE LAST MAT IN THE SYSTEM, EACH

SUCCESSIVE MAT SHOULD THEN BE MOVED AND STACKED FOR

LOADING BY FORKLIFT OR EXCAVATOR ONTO A TRUCK FOR

REMOVAL FROM THE SITE.

FODS TRACKOUT CONTROL

SYSTEM INSTALLATION

GUIDE

THE PURPOSE AND DESIGN OF THE FODS TRACKOUT

CONTROL SYSTEM IS TO EFFECTIVELY REMOVE MOST

SEDIMENT FROM VEHICLE TIRES AS THEY EXIT A

DISTURBED LAND AREA ONTO A PAVED STREET. THIS

MANUAL IS A PLATFORM FROM WHICH TO INSTALL A FODS

TRACKOUT CONTROL SYSTEM. (NOTE: THIS IS NOT A ONE

SIZE FITS ALL GUIDE.) THE INSTALLATION MAY NEED TO BE

MODIFIED TO MEET THE EXISTING CONDITIONS,

EXPECTATIONS, OR DEMANDS OF A PARTICULAR SITE. THIS

IS A GUIDELINE. ULTIMATELY THE FODS TRACKOUT

CONTROL SYSTEM SHOULD BE INSTALLED SAFELY WITH

PROPER ANCHORING AND SIGNS PLACED AT THE

ENTRANCE AND EXIT TO CAUTION USERS AND OTHERS.

KEY NOTES:

A. FODS TRACKOUT CONTROL SYSTEM MAT.

B. FODS SAFETY SIGN.

C. ANCHOR POINT.

D. SILT OR ORANGE CONSTRUCTION FENCE.

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FEBRUARY 28, 2024

WXYA8401

3/21/2024 7:38 AMWXYA8401-GESC501

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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

XXXXXXXXXX

EXISTING MILLINGS

SWALE

TOP OF BERM

EXPAND MILLINGS

PAD BY 16,441 SQ FT

LIMITS OF WETLANDS

SURVEYED

EXISTING MAINTENANCE ACCESS

AOA PERIMETER FENCE

EXISTING MILLINGS

SWALE

(RELOCATE)

EXISTING

RIPRAP SWALEEMERGENCY

SPILLWAY CREST

ADD RESTRICTOR

PLATE OVER

OUTLET PIPE

VEHICLE SERVICE ROAD (MILLINGS SURFACE)

375' LF

AIRPORT TRIBUTARY

(TO COTTONWOOD CREEK)

SR

CD

SCL

SR ECB

RECYCLE 4,700 SQ FT OF

EXISTING MILLINGS PAD

REDIRECT EXISTING

MILLINGS SWALE

5855 5860 5865

LOC

LOC

LOC

LOC LOC

REMOVE MILLINGS FROM AREA

EAST OF RELOCATED SWALE,

REGRADE AND REVEGETATE

B

C

CD

377' LF

SCL

15" RCP

PART 77 COMPLIANCE

GRADING

SR

MILLINGS TO BE

REMOVED, RESTORED,

AND REVEGETATED

135 SQ YD STRAW

COCONUT ECB MILLINGS

SWALERIPRAP LINED

SWALE

A

CM

CM

4.3%

7.2%

1.0%

14.3%

1,075 SY

1,080 SY

SSA

VTC

230' LF

SCL

GRAPHIC SCALE

050' 50' 150'

SCALE: 1" = 50'

N

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GESC101-DC

NOTES:

1. SEE COVER SHEET OF DOUGLAS COUNTY GESC

STANDARD NOTES AND DETAILS (SHEET 1) FOR

LEGEND OF BMP NAMES AND SYMBOLS.

2. SEE CONSTRUCTION PLANS FOR DETAILS OF

PERMANENT DRAINAGE FACILITIES SUCH AS

DETENTION FACILITIES, WATER QUALITY FACILITIES,

CULVERTS, STORM DRAINS, AND OUTLET

PROTECTION.

3. SEE STAGING AND ACCESS PLAN FOR LOCATION OF

STAGING AREAS AND CONCRETE WASHOUT.

4. THE NET CUT/FILL QUANTITIES LISTED IN THE DATA

SECTION ARE BETWEEN EXISTING AND PROPOSED

GRADE.

LEGEND:

PROPOSED MAJOR CONTOUR

PROPOSED MINOR CONTOUR

EXISTING MAJOR CONTOURS

EXISTING MINOR CONTOURS

GRADING LIMITS

STABILIZED STAGING AREA

SEDIMENT CONTROL LOGS

CHECK DAM

EROSION CONTROL BLANKET

SLOPE ARROW

PROPOSED MILLINGS SWALE

PROPOSED RIPRAP SWALE

PROPOSED MILLINGS PAD

G

ES

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D

ASSISTANT DIRECTOR OF DEVELOPMENT

REVIEW

DATE

THESE CONSTRUCTION DRAWINGS HAVE

BEEN REVIEWED BY DOUGLAS COUNTY FOR

GRADING, EROSION AND SEDIMENT CONTROL

IMPROVEMENTS ONLY.

ENGINEERING DIVISION ACCEPTANCE BLOCK

PROJECT BENCHMARK:

APA E IS A STAINLESS STEEL ROD IN A MONUMENT BOX LOCATED

MIDFIELD OF THE AIRPORT EAST OF TAXIWAY A AND WEST OF

RUNWAY 10/28. NAVD88 ELEVATION 5824.80. FOR ADDITIONAL

INFORMATION REFER TO THE PROJECT SURVEY CONTROL PLAN.

THE GRADING, EROSION AND SEDIMENT CONTROL PLAN INCLUDED HEREIN HAS BEEN PREPARED UNDER MY DIRECT SUPERVISION IN ACCORDANCE WITH THE REQUIREMENTS OF THE GRADING, EROSION AND SEDIMENT CONTROL (GESC) CRITERIA

MANUAL OF DOUGLAS COUNTY, AS AMENDED.

REGISTERED PROFESSIONAL ENGINEER: ______________________________________________ DATE: __________________

STATE OF COLORADO NO. _________________________________________________

DOUGLAS P. STEWART

29899

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WXYA8401

3/19/2024 2:07 PMWXYA8401-GESC-101-DC

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5, XX

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AD

O

NO RUNUP BEYOND THIS POINT

NO T

AXI

US CUSTOMS CUSTO

MSCUSTOMS NO T

AXI Z

ONE

NO TAXI NO TAXINO TAXI NO TAXI NO TAXI

T

T

T

T

T

T

T

T

T

T

T

T

T

T5 T6 T7 T8

T4T3T2T1 T19T18

T30T29T28T27T26

T15 T16 T17T14T13T12T11

T23 T25T22

T10T9

T20 T21

T

R

T T T T T T T T T T

T

T24

T41T40T39T38T37T34 T36T33T31 T32 T35

T T T T T T T T T

R

R

R

R

T T T T T T T T T

T T T T T T T T T

T

MN

270 240

030 060 090

KEYMAP AR

FF

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N

G S

EX

PA

N

SI

O N

DATA:

1. DRAINAGE SWALE NET CUT = 103.5 CUBIC YARDS

DRAINAGE SWALE NET FILL = 224.2 CUBIC YARDS

ANTICIPATED IMPORT = 120.7 CUBIC YARDS

2. MILLINGS PAD NET CUT = 97.2 CUBIC YARDS

MILLINGS PAD NET FILL = 455.4 CUBIC YARDS

ANTICIPATED IMPORT = 358.2 CUBIC YARDS

3. PART 77 GRADING AREA NET CUT = 1,272 CUBIC YARDS

3'-4"

1'-11"

4'-0"

2'-6"

3 SPA @ 10" = 2'-6"

5"5"

1'-6 12"

4 12" 1" x 58" SLOTTED

HOLE FOR 12" Ø TOP

ANCHORS

40"x23"x5

8" STEEL

RESTRICTOR

PLATE

EXISTING 15" RCP

POND OUTLET PIPE

BOTTOM OF PLATE

EL. 5822.85

EXISTING PIPE INVERT

EL. 5822.50

ANCHOR BOLT NOTES:

1. TOP ANCHORS: BOLT TZ SS304 (38" Ø x 2 34") OR

APPROVED EQUAL. MINIMUM FACTORED PULLOUT =

4.29 KIPS. ANCHORS SHALL BE INSTALLED IN

ACCORDANCE WITH THE MANUFACTURER'S WRITTEN

INSTRUCTIONS.

2. ALL HARDWARE SHALL BE STAINLESS STEEL, GR 304.

EXISTING POND

OUTLET STRUCTURE

FACE OF INSIDE

WALL

A POND RESTRICTOR PLATE

NTS

4 3 16"

B RIPRAP SWALE

NTS C ASPHALT MILLINGS SWALE

NTS

10'-0"

TYPE L RIPRAP 18"

THICK (D-701)

DESIGN FLOW

DEPTH 0.7 FT

10'-0"

12" COMPACTED AND SEALED

(P-608) ASPHALT MILLINGS (P-101)

DESIGN FLOW

DEPTH 0.5 FT

6" FILTER

MATERIAL (D-701)

COMPACTED SUBGRADE (P-152)1

INSTALL 2-IN NEOPRENE GASKET BETWEEN

THE RESTRICTOR PLATE AND THE OUTLET

STRUCTURE. M

K M

M

AD

D

EN

D

U M

/2

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