Project Overview
El Dorado County has an inventory of 79 bridges. Twenty-four of
these bridges are in the Community Development Agency Transportation Division’s
2015 Capital Improvement Program (CIP). Two of the CIP bridge projects are
crossings over Indian Creek, CIP No. 77127, and Mound Springs Creek, CIP No.
77136. Both bridges are located on Green Valley Road. Planning is currently
underway to replace these two bridge structures.
Current Bridge
Conditions
The Green Valley Road at Indian Creek Bridge
was built in 1935, widened in 1975, and is 80 years old. It is a narrow
two-lane crossing that is 28.2 feet wide. This bridge has substandard
barriers/railings, approach roadway and geometrics; deficient hydraulics; poor
site distance at adjacent roadways; and, concrete is spalling on abutments. The
Green Valley Road at Mound Springs Creek Bridge was also built in 1935 and is
80 years old. It is a narrow two-lane crossing that is 22.3 feet wide. This
bridge has substandard barriers/railings, approach roadway and geometrics;
deficient hydraulics; poor site distance at adjacent roadways; and, concrete is
spalling in various locations. Approximately 4200 vehicles use these crossings
daily with speed ranging from 40 to 55 mph. There are many accident report
histories on this roadway.
Existing Caltrans Sufficiency Issues
The bridges are routinely inspected by
Caltrans every two years and are given a Sufficiency Rating (SR) from 0 to 100
based on 140 elements. Generally if the SR is less than 80, the bridge is
eligible for rehabilitation. If it is less than 50, the bridge is eligible for
replacement. The SR for both the Indian Creek Bridge and the Mound Springs
Creek Bridge are 68.1. Both bridges are classified by Caltrans as Functionally
Obsolete.
Highway Bridge Program (HBP) Funding
The Indian Creek and Mound Springs Creek
Bridges meet federal criteria for replacement and funding under the HBP
Reimbursement Program.
In April 2011, the County received federal authorization
to complete the planning, environmental phase, and scope for the Indian Creek
Bridge, and in April 2012, the Mound Springs Creek Bridge received its federal
authorization. The HBP program requires this phase of work be completed within
10 years of the initial authorization date.
Anticipated
Project Schedule
Design
|
2016 – 2020
|
Environmental
|
2016 – 2018
|
Right of Way
|
2018 – 2020
|
Utility Relocations
|
2018 – 2020
|
Construction
|
2021
|
Public
Outreach During Planning Process
An initial public informational meeting was
held on August 27, 2015 at the Planning Commission Hearing Room. Engineering
staff from the Transportation Division provided an informational presentation
on these two bridge projects. As the project advances, project updates will be
posted on the County website. The public will also have the opportunity to
review and comment on the draft environmental documents.
Bridge
Closures During Construction
There is no plan to close Green Valley Road
during the construction of these bridges. The plan is to maintain two-lane
traffic throughout construction and have minimal periods of one lane traffic
control.