throA002.pdf

E-44 ND PRA THRO 10(3)

NORTH UNIT SCENIC DRIVE

PMIS NUMBER 63939

Construction Requirements

207.04A Geogrid. (Added Subsection.)

When placing a geogrid on native ground, cut the trees and shrubs flush with the ground surface.

Do not remove the topsoil and vegetation mat. Remove all sharp objects and large rocks. Fill depressions or holes with suitable material to provide a firm foundation.

Replace or repair all geogrid that is torn or punctured. Remove the damaged area and place a patch of the same type of geogrid overlapping 3 feet beyond the damaged area. When placing a geogrid on a subgrade or geotextile, prepare the subgrade according to Subsections 204.13(c) and (d).

Place geogrid directly over the geotextile as smoothly as possible. The Geogrid should be pulled taut to remove any wrinkles. Fold or cut the geogrid to conform to curves. Overlap in the direction of construction. Overlap the geogrid according to the manufacturer’s recommendations but no less than 2 feet 1 foot at the ends and sides of adjoining sheets. Do not place longitudinal overlaps below anticipated wheel loads. Pins or piles of cover material may be required to hold the geogrid in place.

End-dump the cover material onto the geogrid from the edge of the geogrid or from previously placed cover material. Do not operate equipment directly on the geogrid. Spread the end-dumped pile of cover material in a uniform layer thickness maintaining a minimum lift thickness of 12 inches. Compact the first lift of cover material with rubber-tired or nonvibratory smooth drum rollers. Do not use sheepsfoot or studded compaction equipment on the first lift placed over the geogrid. Avoid sudden stops, starts, or turns of the construction equipment. Fill all ruts from construction equipment with additional cover material. Do not blade material down to remove ruts. If rutting exceeds 3 inches on the first lift, decrease the construction equipment size and/or weight or increase the lift thickness.

Place subsequent lifts of cover material in the same manner. Vibratory compactors may be used for compacting subsequent lifts. If pumping or foundation failures occur, repair the damaged areas and revert to the use of nonvibratory compaction equipment.

207.06 Acceptance. Add the following:

Material for subgrade stabilization geogrid will be evaluated under Subsections 106.02, 106.03, and 714.03.

Geogrid installation will be evaluated under Subsections 106.02 and 106.04.

Measurement

207.07 Add the following:

Do not measure the overlap for payment.

Amendment A002 April 22, 2009

TYPICAL SECTIONS

1.

2.

12’ Lane 2’12’ Lane2’

Varies

Varies

TYPICAL SHOULDER TREATMENT

3.

Shoulder Aggregate

Shoulder Aggregate

Tack coat

Construct a 1:1 pavement edge

CL

A7 A9

Prime CoatFog Seal

2’2’

2’

LC

3’

Limits of Construction

Edge of Pavement

Windrow Material

3’

Limits of Construction

(Typ. Both sides of Roadway)

12’ Lane12’ Lane

2% 2% Shoulder Aggregate

Shoulder Aggregate

Tack coat

Prime CoatFog Seal

2’2’

LC

Windrow Material

3’

Limits of Construction

(Typ. Both sides of Roadway)

TYPICAL SECTION

STATION 10+00 TO 18+50

Shldr.

Varies

Match

Existing

Shldr.

Varies

Match

Existing

12’ Lane12’ Lane

Tack coat

Roadway aggregate, method 2, 6-inch depth

Prime CoatFog Seal

2’

LC

Limits of Construction

(Typ. Both sides of Roadway) Shldr.

Varies

Match

Existing

Shldr.

Varies

Match

Existing

Match existing profile at centerline

Match existing

Match existing

Remove existing pavement and base, 9.5" depth, paid for as Removal of

Pavement, Asphalt

TYPICAL SECTION

STATION 27+00 TO 80+15

AND 82+65 TO 293+00

TYPICAL SECTION NEAR VISITOR CENTER

STATION 18+50 TO 27+00

7" depth, pulverize existing pavement and base

4.

Windrowing and replacement of existing shoulder material is not measured for payment, it is considered incidental to pay item 30306-3500, pulverizing, 7-inch depth.

The existing pavement thickness within the project limits ranges from 2.4" to 3.6" and the existing base thickness ranges from 3.6" to 7.2".

3.5-inch superpave asphalt concrete pavement

Pulverize existing pavement and base, 7-inch depth

3.5-inch superpave asphalt concrete pavement

3.5-inch superpave asphalt concrete pavement

Pulverize existing pavement and base, 7-inch depth

*Shldr. *Shldr.

* Note: The shoulder width changes to 1’ from station

264+27 to 293+00

3.5" superpave asphalt concrete pavement

Match existing

Match existing

The Contractor is required to locate all existing utilities prior to beginning work.

SHEET 1 OF 3

Place superpave asphalt concrete in two lifts with tack coat between lifts.

Notes:

1. This typical section applies to all pavement in this station range, including parking spaces and turn loop.

2. Match existing grades at the Cattle Guard, Entrance

Kiosk, Concrete Curb, and Approach Roads in this area.

3. The removed pavement and base course can be used as embankment for the Boneyard approach. See Sheet C3.

NOTES:

Existing, base & subbase (depth varies)

Windrow existing shoulder material prior to pulverizing. After placement of asphalt, shoulder-up foreslopes with existing windrowed material and roadway aggregate, 30802-2000. Shape and compact as necessary for drainage and appearance.

NO SCALE

Geotextile, Type II-C

(Subsidiary to Roadway Aggregate)

Geotextile, Type IV-c

REG STATE PROJECT

SHEET

NO.

TOTAL

SHEETS

ND

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

PRA THRO 10(3)

SCENIC DRIVE

MWR

NPS PMIS NO. 63939 DRAWING NO. 387/41913

12’ Lane12’ Lane2’ 2’

1:6

12’ Lane12’ Lane2’ 9’2’

TYPICAL SECTION WITH PAVED DITCH

STATION 10+00 TO 80+15

AND 84+00 TO 293+00

Shoulder Aggregate

Shoulder Aggregate

A8 A9

Apply tack coat between lifts

Variable

Prime Coat

Prime Coat

Fog Seal

Tack coat

Fog Seal

Tack coat

2’

2’

LC

LC

Shldr. Shldr.

Shldr. Shldr.

Paved

Ditch

3’

Windrow Material

Windrow Material

3.5’

Limits of Construction

Limits of Construction

See plans for width

Prime Coat

Prime Coat

PAVEMENT REMOVAL TRANSITION DETAIL

Transition Area

30’

New Buckhorn Trail

Parking Area

See Note 4

4.

Remove the existing paved ditch in new Buckhorn

Parking area. Paid for as Removal of Pavement.

Place Roadway aggregate, method two, varies from 4.5 to 7-inch depth

Pulverize existing pavement and base, 7-inch depth3.5-inch superpave asphalt concrete pavement

Roadway aggregate, method 2

24-inch depth

3.5-inch superpave asphalt concrete pavement

Pulverize existing pavement and base, 7-inch depth

Saw cut and match existing grade

Tack coat

Fog Seal

TYPICAL SECTION WITH PAVED PULLOUT

STATION 80+15 TO 84+00

NEW BUCKHORN PARKING AREA

Windrowing and replacement of existing shoulder material is not measured for payment, it is considered incidental to pay item 30306-3500, pulverizing, 7-inch depth.

2%

Match existing

Match existing

Match existing

SHEET 2 OF 3

3.5-inch superpave asphalt concrete pavement Pulverize existing pavement and base, 7-inch depth

Remove existing pavement, and base, 7-inch depth

3.5-inch superpave asphalt concrete pavement

Place superpave asphalt concrete in two lifts with tack coat between lifts.

15" Concrete curb, colored

Stations: 18+50 to 18+80

26+70 to 27+00

6" Asphalt Curb

(Subsidiary to paved ditch item 60908-1000)

Place Aggregate-Topsoil Course, as directed by the CO

The Contractor is required to locate all existing utilities prior to beginning work.

NOTES:

Geotextile, Type II-C

(Subsidiary to Roadway Aggregate)

Geotextile, Type IV-c

REG STATE PROJECT

SHEET

NO.

TOTAL

SHEETS

ND

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

PRA THRO 10(3)

SCENIC DRIVE

MWR

NPS PMIS NO. 63939 DRAWING NO. 387/41913

CL

12’ Lane12’ Lane

2% 2%

SHOULDER

VARIES

12’ Lane

2’

Shoulder

Varies

Variable

TYPICAL SECTION

PULLOUTS AND PARKING AREAS

Super independent of mainline

Varies

Shoulder Aggregate

Roadway Centerline

Variable

Existing ground

A9 A9

Apply tack coat between lifts

Prime Coat

Prime Coat

Fog Seal

Tack coat

Fog Seal

Tack coat

2’

LC

Windrow Material

3’

Limits of Construction

SHOULDER

VARIES

3’

Limits of Construction

Windrow

Material

See plans for pullout locations and dimensions

Width Varies 6’

Sidewalk, Colored Concrete with 4" aggregate base

Sidewalk

1’

Add aggregate topsoil course, 3-inch depth as directed by the CO

Route Station to Station Length (ft) Length (mi)

10 28300 5.36

TOTAL

PROJECT LENGTH TABLE

CL

12’ Lane

Prime Coat

SHOULDER

VARIES

Mainline

Remove existing pavement and base, 7 inch depth

3.5" superpave asphalt concrete overlay

Prime Coat see plans for length

Limits of construction

TYPICAL SECTION AT APPROACH ROADS

Prime Coat

Remove existing pavement and base, 7 inch depth

Prime Coat

Station 268+75

Station 270+30

Existing concrete deck, do not damage during construction

PAVEMENT DETAIL AT SQUAW CREEK BRIDGE

Top of approach road existing pavement, sawcut at limits of removal

Remove existing pavement and base, 7 inch depth

Place Roadway aggregate, method two

Varies 4.5 to 7-inch depth

15" Colored Concrete curb

3.5" superpave asphalt concrete pavement Pulverize existing pavement and base, 7 - inch depth

Remove existing asphalt pavement from bridge deck, Place superpave asphalt 4" thickness at centerline, and 2" thickness at edge of traveled way

3.5" superpave asphalt concrete pavement

3.5" superpave asphalt concrete pavement

Windrowing and replacement of existing shoulder material is not measured for payment, it is considered incidental to pay item 30306-3500, pulverizing, 7-inch depth.

3.5" superpave asphalt concrete pavement Pulverize existing pavement and base, 7 - inch depth

3.5-inch superpave asphalt concrete pavement

Pulverize existing pavement and base, 7-inch depth

Match existing

Match existing

10+00 to 293+00

28300 5.36

SHEET 3 OF 3

The Contractor is required to locate all existing utilities prior to beginning work.

Place superpave asphalt concrete in two lifts with tack coat between lifts.

Tack Coat

Place Roadway aggregate, method two, 7"

Place Roadway aggregate, method two 7"

TYPICAL SECTION WITH CURB

6" Asphalt Curb

(Item 60901-2300)

Geotextile, Type II-C

Geotextile, Type II-C

Geotextile, Type II-C

1:3 or Flatter.

NOTES:

Geotextile, Type IV-c

Geotextile, Type IV-c

REG STATE PROJECT

SHEET

NO.

TOTAL

SHEETS

ND

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

PRA THRO 10(3)

SCENIC DRIVE

MWR

NPS PMIS NO. 63939 DRAWING NO. 387/41913

CL

NOTE:

Approximate existing roadway section

Subexcavate and recompact with backfill material according to 204.11(b)

Match existing slope when possible.

Adjustment of slope may be necessary in some locations to match the subgrade hinge point.

Finished grade

Subexcavate and recompact with backfill material according to 204.11(b)

:1

Existing ground

SUBEXCAVATION (SPOT SUBEX.)

Existing grade

Finished grade

Match existing slope when possible.

Adjustment of slope may be necessary in some locations to match the subgrade hinge point.

Existing ground

SUBEXCAVATION (FULL WIDTH)

TYPICAL SECTION

Subexcavate and recompact with backfill material according to 204.11(b)

Tack coat

Fog seal

Existing ground

:1 SUBEXCAVATION (HALF WIDTH)

TYPICAL SECTION

SUBEXCAVATION DETAIL

204A

Subexcavation depth

2’ or as directed by CO.

2’ or as directed by CO.

3.5" Superpave asphalt concrete, o r a s d ir e c te d b y C

O

F1 F1

N o r m a l e d g e o f s h o u ld e r

Finished grade

Drawing not to scale

2%

2%

Tack coat

Fog seal

Tack coat

Fog seal

NPS PMIS NO. 63939 DRAWING NO. 387/41913

Geotextile, Type IV-C

Geotextile, Type II-C

Geotextile, Type IV-C

Geotextile, Type II-C

Geotextile, Type I-C

Geotextile, Type II-C

REG STATE PROJECT

SHEET

NO.

TOTAL

SHEETS

ND

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

SPECIAL

U.S. CUSTOMARY SPECIAL

PRA THRO 10(3)

SCENIC DRIVE

MWR

Untitled

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

12300 WEST DAKOTA AVENUE, SUITE 360

LAKEWOOD, COLORADO 80228

ATTENTION: TIFFANY ATCHISON

1:

Remove page E-44 and replace with pages E-44, dated April 22, 2009. Amends Subsection 207.04A

PLAN SHEETS

Remove sheets A7, A8, A9, and F1 and replace with sheets A7, A8, A9, and F1, dated April 22, 2009.

*FAILURE TO ACKNOWLEDGE THIS AMENDMENT BY THE DESIGNATED DATE AND HOUR SPECIFIED IN THE SOLICITATION MAY RESULT IN REJECTION OF YOUR BID (REFER TO ITEM 11.)