Amended Final QnA 12.11.2020.pdf

Questions and Answers during Advertisement for

CO FTNP MEVE 100(1), Cliff Palace & Mesa Top Loop Roads

December 3, 2020

Questions Answers

1 For line items A0880 60704-0000

CLEANING CULVERT IN PLACE 12

EACH and W0880 60704-0000

CLEANING CULVERT IN PLACE 8

EACH, there are 5 TBD locations in

Tabulation of Quantities Schedule A and

5 TBD locations in Option W; could you please specify an assumed dimension width and length for bidding purposes?

An average 24” diameter and an average length of 40ft

2 For line items A0880 60704-0000

CLEANING CULVERT IN PLACE 12

EACH and W0880 60704-0000

CLEANING CULVERT IN PLACE 8

EACH, do you want debris captured or left in place of exit? If captured, where would you like it disposed on site?

Dispose of material as per FP14 Section 607.02

3 In the plans Sheets D16, D22, and D25, regarding the callouts for coordinating with stone masons, is NPS providing traffic control for this as part of the scheduled traffic control GC is providing or will NPS provide separate from contract?

Per project specification the contractor will remove stones and label them for the NPS masonry staff to replace. This coordination will between conducted by FHWA CFL Project Engineer and the contractor to schedule items of work. The completion of the masonry work will be done during the loop closure for each loop.

4 With potential delays and increasing restrictions due to Covid-19 and Colorado

December weather, could electronic submissions of the proposal please be considered.

No, paper bids must be submitted. However, electronic bid modifications will be accepted.

5 To install the Riprap per the cross sections and typical section(s) on sheets G2-

G3, excavation and backfill will be required. Please confirm the excavated quantities will be paid under 20401-0000

Roadway Excavation.

No payment will be made for earthwork required to install riprap aprons. See FP-14 Section 251.

6 Can electronic CAD files be provided to facilitate takeoffs? Specifically, existing

& final ground (DTMs or contours), alignment and other line work would be very helpful.

No, electronic CAD files will not be provided.

7 On Sheet E15 of the IFB (Pg. 118), the third paragraph states “Ground disturbance activities may begin on March

1, 2020 for schedule A”. We presume that this date should be March 1, 2021, but please clarify.

Correct, the date should be March 1, 2021. Amendment A001 will correct this.

8 On Sheet E30 of the IFB (Pg. 133), Part

203.03(a)((Removal of Headwal)(Salvage

Historic)) states “Store stones at location provided by the NPS, near the culvert location”. Please quantify the term “near”

(i.e. within 10-feet of culvert, 50-feet?

etc.).

Assume average of within 50’ for bidding purposes

9 Is there are designated staging area for the

Option “Y” work?

No staging areas other than those shown in the plans

10 Given that there is no site visit scheduled for this project and given the increasing

COVID-19 restrictions, can the Owner provide plan and profile details for the pipework associated with Option “Y”?

No. The site may be accessed by the general public for purposes of investigating the project location. The contractor may view culvert location by walking to the culvert location. No access will be allowed by vehicles.

11 Can a virtual pre-bid meeting be held for this project?

No, there are no plans for a virtual pre-bid meeting to be held with proposed contractors.

12 Regarding the Option “Y” pipework, does the size of the existing culvert pipe(s) scheduled to be removed match the size of the new pipe scheduled to be installed?

Yes, except for Site 1 which is replacing a 96” with two 48” diameter culverts.

13 Regarding the Option “Y” pipework, please quantify how much silt and/or debris exists within the existing pipe (i.e.

25% full, 50% full, etc.).

The option Y pipework are still in operation and passing flow currently from the inlet to the outlet.

14 Regarding the “Manhole Adjustments” bid Item (Pay Item 60405-0000), no rim elevations are provided for either the existing or the planned Manholes. Please quantity an estimated range in the adjustment (i.e. + 0.1’, 0.5’, etc.)

This is a mill and repave project with minor changes noted in the plans. Field adjustments will be required by the contractor to set manhole rim elevations to the proposed pavement elevation.

15 The specifications for section 302 in solicitation 6982AF20B000036 and FP-14 do not specify which grading designation from table 703-3 should be used for Pay

Item 30202-2000 Roadway Aggregate, Method 2. Please clarify which grading designation should be used for supplemental roadway aggregate, method

2.

Section 302 references Subsection 703.06 Crushed Aggregate. This Subsection allows for aggregate conforming to federal or state specifications.

16 Please confirm type of fence to be removed and reset in bid schedule X?

Will fence require new materials to reset?

See the above picture. No new materials are required to reset.

17 Regarding W1120 62302-1000 SPECIAL

LABOR, HIRED TECHNICAL

SERVICES 20 HOUR, could you tell us where to find specifics on the definition of this line item or provide one?

See Special contract requirements section 623 and FP -14 623 General Labor

18 Due to COVID-19 Global Pandemic will the U.S. Department of Transportation, Federal Highway Administration, Central

Federal Lands Highway Division consider electronic bid submittal?

See question #4

19 Is there a designated staging area for bid schedule Option X? Park Entrance

Roundabout.

The contractor will use existing pullouts and distrubed gravel around this intersection. The maintenance area adjacent to entersection may be used for equipment without tracks for weekend storage. No materail will be stored in Maintenance area.

December 9, 2020

20 Where are the Government supplied boulders located?

The supply of boulders is in the Staging yard and the project will utilize the boulders that will be generate from the slope scaling.

21 Is there a detail available for the “SOIL

EROSION CONTROL, STABILIZED

CONSTRUCTION EXIT”?

No detail is available. Use best management practices.

22 For schedule Y:

Where is the access for the work on schedule Y? Yesterday I tried to access from the area shown on the plans and came to a locked gate about half way to the first culvert where you leave park land and enter BLM land.

Will there be any improvements to the road prior to start of construction? Attached are two pictures of the first portion of the road before the locked gate. The road is narrow and very steep in areas. With the concrete headwalls on the culverts my concern is the area is not

The site can be accessed on foot because of the limitation with staffing at the Park the gate will remain closed during bidding. The site will be opened for construction of Option Y work.

No roadway improvements will be done on this roadway besides the plan drainage improvements.

No plans to improve the roadway before the project begins.

The roadway is used to transport cattle by semi transport in the spring and winter each year. The construction would be completed under 30 minutes delays and the contractor will be able to occupy the entire roadway.

accessible to a concrete mixer truck.

23 The spec states that clearing and grubbing must be done by March 1st. It is difficult to predict how much snow we will get this year but there is a real possibility for significant snow accumulation in

February for clearing and grubbing activities. Should snow removal be included or will contract time be adjusted?

The clearing and Grubbing are mainly due to the migratory birds. The project will identify only falling the few trees and grubbing the trees. So, the falling the tree is the only item that needs to be completed by March 1st.

Snow removal will be part of the work when the contractor starts to occupy the road.

24 Spec Section 623.06 states “Measurement will begin from the time a Qualified

Scaler crew is equipped and begins to climb the slope until they have descended the slope”.

Yes, this statement is correct.

25 It appears that multiple scaling sites lack adequate trees or rock to provide natural anchors for the scalers to tie off. In this case the scalers will need to drill adequate anchors using pneumatic hand drills. Will the drilling of these anchors be paid for under Pay Item Number 63202-0100, Special Labor, Slope Scaling?

Yes, this would be covered under the scaling hours for the crew.

26 Sheet T9 note 2 says “ aggregate base under curb and curb and gutter, is paid under Roadway Aggregate, Method

2. Quantities are included in surfacing summaries.” Sheet T10 note 1 says “ no payment will be made for aggregate base, #4 rebar, and isolation joint sealer required for construction of sidewalk.” Please confirm that the aggregate base under curb and curb and gutter is paid under roadway aggregate method 2 but the aggregate base course

The aggregate base under curb and curb and gutter is paid under Roadway Aggregate, Method 2 and is included in the surfacing summaries quantities.

under sidewalk should be inclusive to the sidewalk item.

27 For the A1260 63316-1000 REMOVE

AND RESET SIGN 7 EACH, W1280

63316-1000 REMOVE AND RESET

SIGN 2 EACH, X0700 61920-2000

REMOVE AND RESET GATE 1 EACH,

and X0980 63316-1000 REMOVE AND

RESET SIGN 3 EACH line items, do you want these to be painted as well?

We do not anticipate existing signs and gate need to be painted.

28 Regarding the (Bid Item Alternative:

Government Furnished Lab) line items, will the government or the Contractor be expected to pay for related water and power?

Yes, the contractor will be responsible for lab location rental, and all necessary utilities.

29 Would a 30" Stop sign require a 4" x 4" post or a 4" x 6" post? If the answer is 4" x 6" post which face is the sign mounted to?

A 4” x 4” wood post

30 For the benches, such as on Sheet D4, will they be placed inside the concrete sidewalk bump-out, or against the outside edge of the concrete?

They will be placed inside the concrete sidewalk bump-out.

December 11, 2020

31 Pertaining to Option Y: Sheet T5 provides bedding and backfill details for metal and plastic pipes beneath roadways, but with the service road being native material, do the culverts need to be backfilled with imported fill, or is native suitable? If imported fill is required, which backfill detail should be applied?

See FP14 Section 704 for culvert bedding and backfill requirements. If the native material meets requirements, then native material may be used. Use the appropriate detail for the site conditions.

Site conditions are unknown, however since we are replacing existing culverts it is assumed that

‘Above Natural Ground’ or ‘On Natural Ground’ would apply.

32 Will the on-site representative require an office trailer and or office space?

The on-site representative for the government FHWA CFL Project Engineer (PE) will not require an office or office space from the proposed contractor.

33 Is a test strip required for HMA paving?

Which phases will it be required?

Yes, a test strip is required for HMA paving per specification. The test strip will be conducted on the Schedule A at a location chosen by the proposed contractor.

34 Are any bore logs available?

No bore logs are available for the project.

On sheet A15 for the parking areas it calls for “10” removal of existing material

(paid as FDR and Roadway Excavation)”.

Is the intent to pulverize (FDR) the top 6 inches, set aside the 6 inches of FDR material, remove and dispose of the bottom 4 inches of sub-grade material, and replace the set aside 6 inches of FDR material?

Yes, that is correct. The 4” of removed material paid under 20401-000 Roadway Excavation and the quantity is included in the Grading Summary and contributes to the paid waste item. The set aside 6 inches of FDR material will be supplemented by Roadway Aggregate, Method 2 as shown in Surfacing Summaries.

35 Will Advance Signing be required if the contractor closes Cliff Palace Road for the duration of Schedule A work? Will any

Temporary Traffic Control be required inside of the road closure?

Yes, advance signing will be required for road closure. No traffic control will be required inside of the road closure.

36 Will Advanced Signing be required for the closure of Mesa Top Road? How will any signs be paid for during the performance of Option W? The Summary of Quantities for Option W does not have a bid item for TTC, Construction Sign.

Will any TTC be required inside of the road closure since the road will be closed to the public?

Yes, advance signing will be required for road closure. It is assumed that signs used for construction of Schedule A will be reused for Option W. No traffic control will be required inside of the road closure.

37 For Option X should we bid all TTC bid items, barricades, cones, Portable

Changeable Message Signs, construction signs, and flaggers under the one bid item

Yes, the lump sum TTC pay item for Option X provides payment for all TTC items. TTC items required will depend on the order of operations determined by the contractor.

listed in the Summary of Quantities for

Option X? Can you tell me which devices you will require for Option X?

38 For the three designated storage/laydown areas, do any of these have power presently?

No, the storage/laydown areas don’t have power currently.

39 Can you confirm the sidewalks are not sealed?

Yes, concrete sidewalks are sealed with clear curing compound. No additional sealers are required after the curing compound is applied.

40 On Sheet E30 of the IFB (Pg. 133), Part

203.03(a)((Removal of

Headwall)(Salvage Historic)) states “This work consists of removing and storing historic dry stacked stone headwalls.”

Some of these Headwalls appear to have mortar between the stones such as those at

Sta. 3049+66. Is it the Contractor’s responsibility to completely remove the mortar from the stones?

The contractor will remove the grout, photo, label and stack the headwall stone per specification.

41 Bid schedule Z: Will all removal and reset of guardrail be done at one time during one mobilization? If not please quantify mobilizations needed by guardrail contractor.

The contractor will propose the phasing for the Option Z work with all items included within the schedule. The project goal will be to complete this item of work in the most efficient and safe manner regarding public safety.

42 Drawing Sheets C19-C21 (Bid Schedule

“X”), show two (2 each), existing, “Big

Fink Test Stations” that are presumed to be cathodic test stations in the northwest quadrant of the future roundabout. Please provide direction for what work is needed to move, abandon, or otherwise deal with said test stations. What utility are the cathodic protection stations attached to?

Will this utility be affected by and/or

The Fink Test stations will not be affected with the proposed Construction and will remain in place.

otherwise need to be moved in order to perform work at the roundabout?

43 Plan Sheet T13 calls for a 5’’ diameter hinge post. Sheet T14 calls for a 6’’ diameter hinge post on road closure gate.

Please clarify what diameter post is to be used as hinge post.

The 5” hinge post pipe diameter on T13 is a typographical error. The hinge post should be 6” diameter, as shown on T14. The holding posts are 5” diameter, 44 Can restrooms that are on Cliff Palace &

Mesa Top Loop Roads be used by contractor employees during periods when the public does not have access?

No, the restrooms will be closed and the contractor will have to provide their own restroom facilities for both loop locations listed.

45 Regarding the “Temp. Traffic Control, Concrete Barrier” bid item for Schedule

“Z”, is the entire 415 lf of concrete barrier intended to be moved and then reset at each of the nine (9) scaling and sub excavation locations or are there particular scaling and subexcavation sites for which the concrete barrier would be utilized?

The concrete barrier will be deployed by the contractor on Option Z as many times as required to provide a safe work zone for workers and the traveling public. The contractor will propose phasing plans for all 9 locations to safety work each location for CO approval.

46 Do any of the staging areas have available power for the lab or office trailers? If not can an area be provided for the lab and office trailers where power is available.

The staging areas don’t have power so generators will need to brought in to provide power lab trailers and offices.

47 Are all of the subex locations in bid schedule Z on the left side of the roadway?

Yes, the sub-ex locations are mainly on the fill side of the roadway along the guardrail and do encroach into the adjacent lane. All locations will be defined in the field by the Project Engineer before work is planned.

48 Can temporary traffic signals be used to close ½ of the roadway? If so can they be daytime and nighttime closures?

The variable message signs can be programed to provide useful information to the traveling public that related day and night construction activities for the project.

49 Expansion Joints

Section 615.04

We are interpreting that you are requiring ¾” wide expansion joints every 20LF O.C. for 5” thick sidewalks and 8” thick paving; can you confirm?

This is a correct interpretation of the specification 615.04 relating to expansion joints.

50 Sheet #R2 shows various details, but it does not seem that these are designed for slabs with rebar. Sidewalks are currently specified with #4 rebar 8” O.C. transverse bars, but no longitudinal bars and 8” paving has rebar running both directions.

Regardless of expansion joint spacing, what detail should be used for sidewalks

& Paving?

Please refer to Sheet R1, R2, T9 thru T12 for all items relating to your question. The detail on sheet T10 arrow defines the rebar in 8” OC for both transverse and longitudinal. See plan sheet R2 for detail on expansion joints as shown below:

51 Do all expansion joints require a rip strip to allow for sealer later?

This is not required but can be proposed on expansion joints for the project.

52 What is the detail between the 5” sidewalk and top 6” wide curb?

See Plan sheets R1, R2 and T9 to answer your question. The curb width is 6” at the bottom and 5” at the top of curb. See details below:

53 What is the detail between 8” paving, and face of 6” wide curb?

The details on plan sheets R1, R2 and T9 in combination to answer this question.

54 What is the detail between 8” paving, 10” curb, and curb and gutter at entry round about?

The details on plan sheets R1, R2 and T9 in combination to answer this question.

55 Both curb and curb and gutter is shown with longitudinal rebar. What is the detail for expansion joints & rebar dowels

(specified as ¾” wide x 60’ O.C. in section 609.05) for curbs and curb & gutter?

You are correct the expansion joints are specified with ¾” wide x 60’ O.C. in section 609.05) for curbs and curb & gutter. Contractor will layout expansion joints per specification prior to concrete pour for QC and PE approval.