Addendum No 1.pdf

Public Works

1370 W Black Bear Road, PO Box 397

Telluride, CO 81435

Addendum No. 1

Canyonland and Tomboy St. Utility and Paving Improvements

Town of Telluride, Colorado

1. F/A Minor Contract Revisions: Contractor shall fill in $10,000.

2. Line Item 31 shall be read to mean 430 cubic yards (CY), not 150 cubic feet (CF). Contractor may edit the bid form accordingly.

3. Invert elevation coming East IN Proposed MH #3 will be 8732.9’. See additional notes and clarifications on Plan Sheets 31 & 32 attached to this Addendum.

4. Two (2) related soil borings are attached, and one (1) particle size distribution taken along the proposed alignment on the Canyonland lot. Contractor may assume soil permeability changes within the construction dewatering matrix, as varying layers of soil to be dewatered are characteristic of USCS Classification SP (poorly graded sands, gravelly sands, with little or no fines), SM (silty sands), and to a lesser, but present extent SC (clayey sands).

5. Bypass pumping shall be considered subsidiary to connections to existing sewer (Line Item 14).

Flow into MH 56.2.1 is approximately 200 gpm (flow is considerably less when school is not in session with the high school being on this line). Flow into existing MH 57.2.0 (5-LF east of proposed MH #3) is approximately 5 gpm. Flow into existing MH #1 on Pacific (56.0.0) from the north is 10 gpm.

6. Contractor shall include cost of geotextile filter fabric Mirafi 140N for soil separation (procurement and installation). Mirafi 140N shall be secured on bottom, sides, and overlapped

18-inches on top of the Squeegee pipe embedment. Costs shall be considered subsidiary to Line Item 32.

7. Complete closure of Tomboy Street may be allowed provided detailed construction schedule is coordinated with the Town, Telluride Lodge, and area residents.

8. Contractor may list exceptions to the bid here:

Tara Ogren, P.E., CFM Town Engineer | Public Works 1370 Black Bear Rd., Telluride, CO 81435 Direct: 970-728-2169

End of Addendum No. 1

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PRINT DATL JUNE 26, 2024

SANITARY SEWER PROFILE 2

ii DRAWING FILE NAME: 196942000 .. SSWLPti'.DWG

SHEET REVISIONS

tj HORIZ SCALE·

DATE: COMMENTS:

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· · VERT. SCALE, l&L)

INITIAL,

TOMBOY STREET ROADWAY AND UTILITY

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IMPROVEMENTS

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"'''"'''"''°"' SANITARY PLAN & PROFILE

,,, :SS30.l-� 81615 �

,--------------------=] ! TELLIJRIDE, 0081435

d <>m• i&L)

(9TOJ 72B-mo CHECKED BY: SEH/BEC

DESIGNED BY: DNP/MJK

SHEET SUBSET: SNffl"� a: I SUBSET SHEET: OF

LEGEND

PROPERTY LINE

EASEMENT

LOT LINE

PROPOSED SANITARY MAIN

EXISTING SANITARY MANHOLE

SANITARY SEVIER TO REMAIN

SANffARX Sf'l'PfR GQ:JSJBI IGDQN tJQIES·

1. THE CONTRACTOR SHALL MAINTAIN EXISTING SANITARY

SYSTEM FLOWS DURING CONSTRUCTICJ.I. TEt.lPORARY B'rPASS TO BE INSTALLED DURING TIE IN OF NEW INfRASTRUClURE UNDER TOM<! Cf" TELLURIDE DIRECTION

PER RE\1SION TO SECTION 604 ANO 630. MAXIMUM OF

ANTICIPATED F'LOWS IN EXISTING SANITARY LINE IS 50

GP•

2. OOYiNSTREAM SANITARY PIPE SHALL NOT BE

ABANDONED OR REMOVED UNTIL A CONNECTION TO THE

ULTIMATE OUTFALL LOCATION THROUGH NEW SANITARY

PIPE IS INSTALLED ANO ESTA8USHEO BY THE

CONTRACTOR.

3. SANITARY SE'ft£R LINE SHALL BE TESTED PER THE

REQUIREMENTS OF TOWN OF TELLURIDE, PRIOR TO

BACKRLL ANO CONNECTION TO EXISTING SANITARY

SYSTEM.

4. THE CONTRACTOR IS RESPONSIBLE FOR COOROINATION

WITH ADJACENT BUSINESSES ANO RESIDENCES DURING

SANITARY SE'ft£R IMPROVEMENTS ANO OPERATIONS UNDER DIRECTION OF THE TO\loff OF TELLURIDE.

5. FOR TYPICAL TRENCH BOX ANO OPEN TRENCH

CONSTRUCTION REQUIREMENTS SEE SHEETS 5 ANO 6.

6. FOR TOWN OF TELLURIDE STANDARD SEWER

CONSTRUCTION DETAILS REFERENCE SHEET 34.

r:m "'°""'"'below. iliiC)I �allbeforeyoudlg.

PROJECT NO./CODE

196942000

SHEET NUMBER 32

Tested By: MJ Checked By: JLH

Particle Size Distribution

ASTM C117 & C136

P E

R C

E N

T F

IN

E

R

GRAIN SIZE - mm.

0.0010.010.1110100

CDOT Class 1 2021

% +3" Coarse

% Gravel

Fine Coarse Medium

% Sand

Fine Silt

% Fines

Clay

0.0 12.6 18.6 10.4 17.8 19.5 21.1 i n i n i n

½ i n i n

¾ i n

½ i n

/8 i n

Test Results (ASTM C117 & C136) Material Description

Atterberg Limits

Coefficients

Classification

Test Remarks

Sample Date:

Location: Native Trench Fill - Blend Sample Number: BS1 Depth: 1-9'

Client:

Project:

Project No:

Sieve Size or

Diam. (mm.)

Finer

Spec.*

Out of Spec.

Pct.

of

Fines brown silty SAND with gravel

3" 2.5" 2"

1.5" 1"

3/4" 1/2" 3/8" #4 #8

#16 #40 #100 #200

100.0 99.0 98.5 95.1 90.7 87.4 79.0 76.5 68.8 60.3 52.4 40.6 27.6 21.1

95-100

30-65

3-15

-1.0

+3.8

+6.1

90.4 87.5 78.7 69.0 59.9 46.4 31.6 24.1

20 23 3

23.8260 16.8279 2.2928

0.9573 0.1839

SM A-1-b

5/7/2024

Town of Telluride

Canyonlands, Colorado Ave. Pipeline Telluride, CO

2024-078-CMT

PL= LL= PI=

D90= D85= D60= D50= D30= D15= D10= Cu= Cc=

USCS= AASHTO=

* CDOT Class 1 2021

Geotechnical & Environmental Sciences Consultants

BORING LOCATIONS

NOTE: DIMENSIONS, DIRECTIONS AND LOCATIONS ARE APPROXIMATE. I REFERENCE: KIMLEY HORN, 09/21/23.

FEET

80 1600

TELLURIDE, COLORADO

502799002 I 11/23

FIGURE 2

N

TELLURIDE CANYONLANDS AND TOWER HOUSE

W

. COLORADO AVENUE

C O

R N

E T

S T

R E

E T

B-4

B-5

B-1

B-2

B-3

LEGEND

Boring LocationB-5

Ninyo & Moore | Telluride Canyonlands & Tower House, Telluride, Colorado | 502802002 R | December 21, 2023

APPENDIX A

Boring Logs

Ninyo & Moore | Telluride Canyonlands & Tower House, Telluride, Colorado | 502802002 R | December 21, 2023

APPENDIX A

BORING LOGS

Field Procedure for the Collection of Disturbed Samples Disturbed soil samples were obtained in the field using the following methods.

Bulk Samples Bulk samples of representative earth materials were obtained from the exploratory borings.

The samples were bagged and transported to the laboratory for testing.

Field Procedure for the Collection of Relatively Undisturbed Samples Relatively undisturbed soil samples were obtained in the field using the following methods.

The California Drive Sampler The sampler, with an external diameter of 2.4 inches, was lined with four, 4-inch long, thin brass rings with inside diameters of approximately 1.9 inches. The sample barrel was driven into the ground with the weight of a hammer in general accordance with ASTM D3550. The driving weight was permitted to fall freely. The approximate length of the fall, the weight of the hammer, and the number of blows per foot of driving are presented on the boring logs as an index to the relative resistance of the materials sampled. The samples were removed from the sample barrel in the brass liners, sealed, and transported to the laboratory for testing.

D

EP

TH

(f ee t)

B ul k

SA

M P

LE

S

D riv en

B

LO

W S

/F O

O T

M O

IS

TU

R E

D R

Y D

E N

SI

TY

(P C

F)

SY

M

B O

L

C

LA

SS

IF

IC

A

TI

O

N U

.S .C

.S

BORING LOGS

FIGURE 1

BORING LOG EXPLANATION SHEET

SM

CL

Bulk sample.

Modified split-barrel drive sampler.

2-inch inner diameter split-barrel drive sampler.

No recovery with modified split-barrel drive sampler or 2-inch inner diameter split-barrel drive sampler.

Sample retained by others.

Standard penetration test (SPT).

No recovery with SPT.

Shelby tube sample. Distance pushed in inches/length of sample recovered in inches.

No recovery with Shelby tube sampler.

Continuous push sample.

Seepage.

Groundwater encountered during drilling.

Groundwater measured after drilling.

MAJOR MATERIAL TYPE (SOIL):

Solid line denotes unit change.

Dashed line denotes material change.

Attitudes: Strike/Dip b: Bedding c: Contact j: Joint f: Fracture F: Fault cs: Clay Seam s: Shear bss: Basal Slide Surface sf: Shear Fracture sz: Shear Zone sbs: Shear Bedding Surface

The total depth line is a solid line that is drawn at the bottom of the boring.

AST

OARSE

SOILS

more than

50% retained on No. 200 sieve

GRA EL

more than

50% of coarse fraction retained on No. sieve

CLEAN GRA EL GW well-graded GRA EL

GP poorly graded GRA EL

GRA EL with

DUAL

CLASSIFICATIONS

GW-GM well-graded GRA EL with silt

GP-GM poorly graded GRA EL with silt

GW-GC well-graded GRA EL with clay

GP-GC poorly graded GRA EL with clay

GRA EL with

FINES

more than

GM silty GRA EL

GC clayey GRA EL

GC-GM silty clayey GRA EL

50% or more of coarse fraction passes

No. sieve

CLEAN SAND SW well-graded SAND

SP poorly graded SAND

SAND with

DUAL

CLASSIFICATIONS

SW-SM well-graded SAND with silt

SP-SM poorly graded SAND with silt

SW-SC well-graded SAND with clay

SP-SC poorly graded SAND with clay

SAND with FINES more than

SM silty SAND

SC clayey SAND

SC-SM silty clayey SAND

SOILS

50% or more passes No. 200 sieve

LA

li uid limit less than 50%

INORGANIC

CL lean CLAY

ML SILT

CL-ML silty CLAY

ORGANIC

OL (PI ) organic CLAY

OL (PI ) organic SILT

LA

li uid limit

50% or more

INORGANIC

CH fat CLAY

MH elastic SILT

ORGANIC

OH (plots on or above A -line) organic CLAY

OH (plots below A -line) organic SILT

Highly Organic Soils PT Peat

Geotechnical & Environmental Sciences Consultants ery Loose 5

Loose 5 - 10 - 21 - - 1

Medium Dense 11 - 0 22 - - 20 15 - 2

Dense 1 - 50 - 105 21 - - 0 ery Dense 50 105 0 ery Soft 2 1 2

Soft 2 - - 5 1 - 2 -

Firm 5 - - 10 - 5 -

- 15 11 - 20 - 10 - 1

1 - 0 21 - 11 - 20 1 - 2

Hard 0 20 2

0 10

20 0 0 50 0 0 0 0 100

L L

Boulders 12 12 Larger than basketball-sized

Cobbles - 12 - 12 Fist-sized to basketball-sized

Gravel

Coarse / - / - Thumb-sized to

Fine - / 0.1 - 0. 5 Pea-sized to thumb-sized

Sand

Coarse 10 - 0.0 - 0.1 Rock-salt-sized to pea-sized

Medium 0 - 10 0.01 - 0.0 Sugar-sized to rock-salt-sized

Fine 200 - 0 0.002 - 0.01

Flour-sized to sugar-sized

Fines Passing 200 0.002 Flour-sized and smaller

9.4

4.9

15.1

13.0

SP-SC

SM

SP-SM

ROADBASE: Approximately 4 inches thick.

FILL:

Dark reddish brown, moist, silty, clayey SAND with gravel.

ALLUVIUM:

Dark reddish brown, dry to moist, medium dense, fine to coarse SAND with clay and gravel.

Dark brown, wet, loose, silty SAND with gravel.

@10': Groundwater encountered during drilling.

Reddish brown, wet, medium dense, fine to coarse SAND with silt and gravel.

Total Depth: 15.5 feet.

Groundwater was encountered during drilling at approximately 10 feet.

Backfilled with on-site soil after drilling on 11/14/2023.

Notes:

Groundwater may rise to a level higher than that measured in borehole due to seasonal variations in precipitation and several other factors as discussed in the report.

The ground elevation shown above is an estimation only. It is based on our interpretations of published maps and other documents reviewed for the purposes of this evaluation. It is not sufficiently accurate for preparing construction bids and design documents.

FIGURE A- 1

TELLURIDE CANYONLANDS & TOWER HOUSE

TELLURIDE, COLORADO

502802002 | 12/23

D E

P T

H fe e t)

B u lk S

A M

P L

E S

D ri ve n

B L

O W

S /F

O O

T

M O

IS

T

U R

E

D R

Y D

E N

S

IT

Y

P C

F

S Y

M B

O L

C L

A S

S

IF

IC

A

T

IO

N U

.S .C

.S

DESCRIPTION/INTERPRETATION

DATE DRILLED 11/14/2023 BORING NO. B-1

GROUND ELEVATION 8,735' SHEET 1 OF

METHOD OF DRILLING CME 45, 4" Solid Stem Auger (Dakota Drilling)

DRIVE WEIGHT 140 lbs. (Spooling Cathead) DROP 30"

SAMPLED BY MEO LOGGED BY MEO REVIEWED BY SS

8.3

7.3

10.7

31.5

SP

SC-SM

ROADBASE: Approximately 2 inches thick.

FILL:

Brown, dry, silty, clayey SAND with gravel and rootlets.

ALLUVIUM:

Reddish brown, dry to moist, very loose, fine to coarse SAND with gravel; trace clay.

@8': Groundwater encountered during drilling.

Reddish brown, moist to wet, very loose, silty, clayey SAND; trace gravel.

Total Depth: 15.5 feet.

Groundwater was encountered during drilling at approximately 8 feet.

Backfilled with on-site soil after drilling on 11/14/2023.

Notes:

Groundwater may rise to a level higher than that measured in borehole due to seasonal variations in precipitation and several other factors as discussed in the report.

The ground elevation shown above is an estimation only. It is based on our interpretations of published maps and other documents reviewed for the purposes of this evaluation. It is not sufficiently accurate for preparing construction bids and design documents.

FIGURE A- 3

TELLURIDE CANYONLANDS & TOWER HOUSE

TELLURIDE, COLORADO

502802002 | 12/23

D E

P T

H fe e t)

B u lk S

A M

P L

E S

D ri ve n

B L

O W

S /F

O O

T

M O

IS

T

U R

E

D R

Y D

E N

S

IT

Y

P C

F

S Y

M B

O L

C L

A S

S

IF

IC

A

T

IO

N U

.S .C

.S

DESCRIPTION/INTERPRETATION

DATE DRILLED 11/14/2023 BORING NO. B-3

GROUND ELEVATION 8,737' SHEET 1 OF

METHOD OF DRILLING CME 45, 4" Solid Stem Auger (Dakota Drilling)

DRIVE WEIGHT 140 lbs. (Spooling Cathead) DROP 30"

SAMPLED BY MEO LOGGED BY MEO REVIEWED BY SS