ENGINEERING DIVISION

13th Street Storm Drain Replacement Project

Prebid Meeting for Phases 2 & 3

River

City

Hall North Point Mall

Power

hous

e

Scie

nce

Cente

r

Cam

ino

del

Rio

ENGINEERING DIVISION

Agenda

(1)Bid Requirements

(2)Project Overviewa) High Level – Aerial, Slides, Photosb) Plans – Walk through sheets

(3)Attention Items

(4)Questions

(5)Wrap up

ENGINEERING DIVISION

Site Overview & Aerial

Phase 2Cross CDOT

Phase 3City Properties & Discharge to

River

Phase 3Connect to

existing infrastructure and abandon old pipe

River

City

Hall

North Point Mall

Power

hous

e

Scie

nce

Cente

r

Cam

ino

del

Rio

Phase 1Cross

D&SNGR

ENGINEERING DIVISION

Phase 1 – Cross D&SNGR (Completed)

• Constructed during D&SNGR shutdown period in 2014

• Shown on the plans, but bidding is for Phases 2 & 3 only

• Will need to tie into Phase 1 as part of Phases 2 & 3.

ENGINEERING DIVISION

Phase 2 – Cross CDOT Highway 550 (aka Camino del Rio)

• New alignment

• Phased approach for traffic• 3 lanes of travel at all times

• One panel construction limit

• Sewer line proximity & pipe slope• Unknown gas location

• Backfill - flow-fill• Anchor pipe for float

• New concrete panel must be tied into adjacent panel(s) and curb/gutter

• New Type R Inlet

• Tie into Phase 1

• New structure/pipe installed to get outside of CDOT right-of-way

ENGINEERING DIVISION

Phase 3 – City Properties to the Animas River

• Old pipe alignment

• New Filter Vault & Diversion Structure• Connect to Phase 2

• New surface WQ feature(s)• Includes a wall, Rain Garden, Sand

Filter • Landscaping (TBD)

• Connect to other infrastructure

• Improve pavement for FS&R

ENGINEERING DIVISION

Phase 3 – City Properties, Outfall to the Animas River, North Point Mall Parking Lot

• Outfall to Animas River• City Arborist • ART access• Access to Powerhouse Science Center• Cleanup at outfall

ENGINEERING DIVISION

Phase 3 – City Properties, Outfall to the Animas River, North Point Mall Parking Lot

• Connect Phase 3• Adding new structures and connecting

to existing infrastructure

• Demo/abandon old storm pipe

• Final Stabilization, cleanup and wrap up

ENGINEERING DIVISION

Plans & Attention Items

• Construction Phases 1, 2 & 3 Limits

• Phase 2 timing (March 30th – May 22nd)

• Traffic phasing vs traffic control

• Stormwater Management

• Uranium Mill Tailings & Management

• Sewer line under Camino del Rio

• Unknown gas line depth/location

• Water Quality features• CDS unit & Diversion structure• Rain Garden & Sand Filter• High flow bypass

• Outfall to River & Ordinary High Water Mark

ENGINEERING DIVISION

Questions?

Additional Questions can be sent to Purchasing Department (Karen Herman)

karen.herman@durangogov.org

970-375-4994

Question Deadline – February 24th

Response to Questions & Addendum – February 27th

Bid Opening – March 5th

Bid Award – March 12th

Notice to Proceed – March 30th