HomeMy WebLinkAboutA014 - August 25, 2026, Regular Meeting of the Ames City CouncilITEM #:17
DATE:08-25-26
DEPT:PW
SUBJECT:IDOT DETOUR AGREEMENT FOR US 30 PAVEMENT PROJECT
COUNCIL ACTION FORM
BACKGROUND:
The Iowa Department of Transportation (DOT) has scheduled a 2027 construction project in
the westbound lanes of US 30 in Ames between South Dayton Avenue and South Duff
Avenue. To complete the construction project, the westbound interchange ramp at Dayton
Avenue (ramp C) along US 30 will be temporarily closed between January 2 and September
15, 2027, and the westbound interchange ramp at Duff Avenue (ramp A) along US 30 will be
temporarily closed between January 2 and April 15, 2027.
To accommodate traffic during construction, the DOT has proposed detouring vehicles onto
local roads. The City has been asked to enter into an Agreement for Use of Local Agency
Roads as Detours (attached). The designated detour route includes SE 16th Street from
South Dayton Avenue to US 69. The closure and detours are marked on the attached
agreement.
According to the agreement:
The DOT will maintain the detour route during the closure period and provide all required
traffic control devices per the Manual on Uniform Traffic Control Devices (MUTCD).
The DOT and Engineers from the City will jointly inspect the condition of the detour route
prior to construction.
The DOT will compensate the City or restore the local road to its original condition if
excessive wear or damage occurs due to the detour, following DOT Policy 600.05 and
Iowa Code Sections 313.28 and 313.29.
No pre-detour maintenance is planned.
The City has the option to disallow oversize/overweight loads, and the DOT will be
responsible for routing such traffic if permitted.
The Public Works Traffic Division will continually monitor and adjust signal timings as needed
during the detour period. City staff will work closely with the Contractor, Peterson
Contractors Inc. (PCI), on project timing and efforts that can be undertaken to
accommodate the particularly heavy traffic in this area related to ISU football game
days.
1
ALTERNATIVES:
1. Approve the attached Detour Agreement with the Iowa Department of Transportation.
2. Do not approve the detour agreement.
CITY MANAGER'S RECOMMENDED ACTION:
The proposed detour is necessary to allow the Iowa DOT to complete construction
activities on US 30 while providing the most effective management of traffic during the
construction period. While public notification will be the responsibility of the Iowa DOT,
the City will assist with public awareness efforts. Therefore, it is the recommendation of
the City Manager that the City Council adopt Alternative No. 1, as described above.
ATTACHMENT(S):
US 30 - WB Exit Detour_Ramp A Duff Avenue - initial letter.pdf
US 30 - WB Entrance Detour_Ramp C Dayton Ave - Initial letter.pdf
2
IOWA DEPARTMENT OF TRANSPORTATION
DISTRICT 1
1020 South 4th Street
Ames, IA 500101
515-239-1635
www.iowadot.gov
July 21, 2026 Ref: 2701
Project No.: NHSX-030-5(310)--3H-85
PIN No.: 19-85-030-020
Mindy Bryngelson, P.E.
Municipal Engineer
515 Clark Ave.
Ames, IA 50010
Subject: US 30 PCC Pavement - Grade and New Project Detour Agreement with City of Ames
Dear Mindy:
The Iowa Department of Transportation has scheduled a PCC Pavement - Grade and New project for US 30 S Duff Ave to
S Dayton Ave in Ames (WB).
US 30 Duff Ave. Ramp A will need to be closed in order to complete the project. Construction will occur in calendar year
2027, and the closure is estimated to be from January 2 to April 15. During the project, US 30 Duff Ave. Ramp A traffic
will be detoured as indicated on the enclosed map. This detour will include local agency roads and requires an
Agreement for Use of Local Agency Roads as Detours.
If this is agreeable, please return a signed copy of the enclosed agreement. Upon receipt, the DOT portion will be
completed, and a fully signed copy will be returned for your records.
If you have any questions, please contact me at 515-239-1635 or devendra.tamrakar@iowadot.us.
Sincerely,
Devendra Tamrakar
District 1 - North Area Engineer
Enclosure
cc: Jeremey Vortherms, IA DOT, District 1
File
3
Form 810012
(07-21)
AGREEMENT FOR DOT-INITIATED DETOUR OF PRIMARY HIGHWAYS ONTO LOCAL ROADS
This Agreement is entered into by and between the Iowa Department of Transportation, hereinafter known as the DOT; and the
City of Ames
City Council
County Board of Supervisors, hereinafter known as the Local Public Agency (LPA).
WHEREAS, the DOT, hereinafter known as DOT, has determined the necessity to temporarily close primary highway
US 30 Exit Ramp
from
US 30
to
Dayton Ave
for the purpose of construction, reconstruction, maintenance, natural disasters, or other emergencies that are 48 hours or longer (incident
management temporary detours are covered under a separate detour agreement (Form 810076)); and
WHEREAS, it is necessary to provide a detour for the primary highway closure period; and
WHEREAS, the LPA agrees to permit the use of its roads as a detour, more particularly described as follows:
On SE 16th St, from S Dayton Ave to US 69;
; and
WHEREAS, Authorized representatives of both the DOT and the LPA have jointly inspected and documented the condition of the proposed detour to
reasonably reflect the condition of the roadway base, surface, shoulders and bridges; and
WHEREAS, the DOT has reviewed and inspected the bridges on the detour, if applicable. The LPA will will not allow oversize
and/or overweight loads. The DOT shall approve the routing of overweight vehicles on the detour route, up to the limits specified by the
LPA; and
WHEREAS, the DOT agrees to perform the following pre-detour maintenance, if any:
None
; and
WHEREAS, the DOT agrees to maintain the detour and provide all traffic control devices required by the Manual of Uniform Traffic Control Devices
(MUTCD), as adopted by the DOT pursuant to 761 IAC 130, including the marking of no-passing zones during the period the local agency road(s)
and structure(s) are being utilized as a primary road detour; and
WHEREAS, Prior to revocation of the detour, the DOT shall follow Iowa DOT Policy 600.05 for detour compensation of the LPA, and when
requested by the LPA, either restore the local agency road to as good of condition as it was prior to its designation as a temporary primary road, or
adequately compensate the local agency for excessive traffic or damage upon the local agency road during the period it was used as a temporary
primary road, in accordance with Section 313.28 or Section 313.29 of the Iowa Code and Iowa DOT Policy 600.05; and
WHEREAS, The detour period is estimated to begin
January 2, 2027
and end
April 15, 2027
; and
(date) (date)
WHEREAS, the parties agree to the following additional provisions, if any:
None
NOW, THEREFORE, BE IT AGREED that the described road be used as a detour under stipulations outlined above.
IN WITNESS WHEREOF, The parties hereto have caused this agreement to be executed by proper officers thereunto duly authorized as of the dates
below indicated.
District Engineer (or designee)
Iowa Department of Transportation
Date
City representative
Date
Printed name and title of city representative
County representative
Date
Printed name and title of county representative
4
Detour Direction
Detour Route
Ramp Closure
skoontz10:29:12 pw:\\projectwise.dot.int.lan:PWMain\Documents\Projects\8503002019\Design\(310) - Grade and New (Westbound)\SHT_85030310_J53.dgn
DESIGN TEAM PROJECT NUMBER SHEET NUMBER COUNTY
26/06/2026
ENGLISHFILE NO.
S
K
E
L
L
O
G
G
S 17TH ST
S 16TH ST
S
H
I
G
H
A
V
E
SE 16TH ST
CHESTNUT
ST
BU
C
K
E
Y
E
A
V
E
AIRPORT RD
S
D
U
F
F
A
V
E
CIR
CRYSTAL ST
ST
CI R
TURQ
UO
ISE ONYX
CIR
EM
E
R
A
L
D
D
R
DIAMOND
SE 16TH ST
Ames Municipal
Airport
AIRPO
RT
DR
OPAL CIR
CI R
SA
P
P
H
I
R
E
S
D
A
Y
T
O
N
A
V
E
DR
SE 18TH ST
AVE
BILLY SUNDAY RD
KITTY HAWK DR
CRYSTAL ST
RUBY
CT
ONYX ST
CT
AV
E
S
DAYTO
N AVE
S
B
E
L
L
A
V
E
HYATT CIR
S
D
A
Y
T
O
N
P
L
AI
R
P
O
R
T
C
T
ASPEN RIDGE RD
HARCOURT
DIAMON
D
TOPAZ
FRO
NTAGE RD
ISAAC
AS
P
E
N
DR
LD
E
N
GO
GRAND AVE
Ioway Creek
Skunk R
iver
NEWTON
DETOUR ROUTE
DUFF AVE RAMP A
INTERSTATE
35
DUFF AVE
RAMP CLOSED
FOLLOW DETOUR
END
DETOUR
1
48" x 48"
W20-2DETOUR
AHEAD
SIGN
CUSTOM
24" X 18"
M4-8A
2 3
1
1
2
2
3
4
5
67
Duff Ave Ramp C
Duff Ave Ramp A
Duff Ave Ramp D
Loop F
Duff Ave
B pmaR evA ffuD
B pmaR evA notyaD
C pmaR evA notyaD
A pmaR evA notyaD
D pmaR evA notyaD
- Sign Placement Not to Scale -
for Additional Safety Closure and Sign Layouts
Refer to Traffic Control Plan Sheets
30
48" x 36"
M4-9R
DuffAve DuffAve DuffAveDuffAveCUSTOM SIGN
4
CUSTOM SIGN
30" x 24"
M4-9R
5
CUSTOM SIGN
30" x 24"
M4-9S
6
CUSTOM SIGN
30" x 24"
M4-9L
7
WHKS & CO.STORY NHSX-030-5(310)--3H-85 J.54
5
IOWA DEPARTMENT OF TRANSPORTATION
DISTRICT 1
1020 South 4th Street
Ames, IA 500101
515-239-1635
www.iowadot.gov
July 21, 2026 Ref: 2701
Project No.: NHSX-030-5(310)--3H-85
PIN No.: 19-85-030-020
Mindy Bryngelson, P.E.
Municipal Engineer
515 Clark Ave.
Ames, IA 50010
Subject: US 30 PCC Pavement - Grade and New Project Detour Agreement with City of Ames
Dear Mindy:
The Iowa Department of Transportation has scheduled a PCC Pavement - Grade and New project for US 30 S Duff Ave to
S Dayton Ave in Ames (WB).
Interchange Ramps along US 30 Dayton Ave. Entrance Ramp C will need to be closed in order to complete the project.
Construction will occur in calendar year 2027, and the closure is estimated to be from January 2 to September 15.
During the project, US 30 Entrance Ramp C ramp traffic will be detoured as indicated on the enclosed maps. This detour
will include local agency roads and requires an Agreement for Use of Local Agency Roads as Detours.
If this is agreeable, please return a signed copy of the enclosed agreement. Upon receipt, the DOT portion will be
completed, and a fully signed copy will be returned for your records.
If you have any questions, please contact me at 515-239-1635 or devendra.tamrakar@iowadot.us.
Sincerely,
Devendra Tamrakar
District 1 - North Area Engineer
Enclosure
cc: Jeremey Vortherms, IA DOT, District 1
File
6
Form 810012
(07-21)
AGREEMENT FOR DOT-INITIATED DETOUR OF PRIMARY HIGHWAYS ONTO LOCAL ROADS
This Agreement is entered into by and between the Iowa Department of Transportation, hereinafter known as the DOT; and the
City of Ames
City Council
County Board of Supervisors, hereinafter known as the Local Public Agency (LPA).
WHEREAS, the DOT, hereinafter known as DOT, has determined the necessity to temporarily close primary highway
US 30 WB Ent. Ramp
from
S Dayton Ave.
to
US 30
for the purpose of construction, reconstruction, maintenance, natural disasters, or other emergencies that are 48 hours or longer (incident
management temporary detours are covered under a separate detour agreement (Form 810076)); and
WHEREAS, it is necessary to provide a detour for the primary highway closure period; and
WHEREAS, the LPA agrees to permit the use of its roads as a detour, more particularly described as follows:
On SE 16th St, from S Dayton Ave to US 69;
; and
WHEREAS, Authorized representatives of both the DOT and the LPA have jointly inspected and documented the condition of the proposed detour to
reasonably reflect the condition of the roadway base, surface, shoulders and bridges; and
WHEREAS, the DOT has reviewed and inspected the bridges on the detour, if applicable. The LPA will will not allow oversize
and/or overweight loads. The DOT shall approve the routing of overweight vehicles on the detour route, up to the limits specified by the
LPA; and
WHEREAS, the DOT agrees to perform the following pre-detour maintenance, if any:
None
; and
WHEREAS, the DOT agrees to maintain the detour and provide all traffic control devices required by the Manual of Uniform Traffic Control Devices
(MUTCD), as adopted by the DOT pursuant to 761 IAC 130, including the marking of no-passing zones during the period the local agency road(s)
and structure(s) are being utilized as a primary road detour; and
WHEREAS, Prior to revocation of the detour, the DOT shall follow Iowa DOT Policy 600.05 for detour compensation of the LPA, and when
requested by the LPA, either restore the local agency road to as good of condition as it was prior to its designation as a temporary primary road, or
adequately compensate the local agency for excessive traffic or damage upon the local agency road during the period it was used as a temporary
primary road, in accordance with Section 313.28 or Section 313.29 of the Iowa Code and Iowa DOT Policy 600.05; and
WHEREAS, The detour period is estimated to begin
January 2, 2027
and end
September 15, 2027
; and
(date) (date)
WHEREAS, the parties agree to the following additional provisions, if any:
None
NOW, THEREFORE, BE IT AGREED that the described road be used as a detour under stipulations outlined above.
IN WITNESS WHEREOF, The parties hereto have caused this agreement to be executed by proper officers thereunto duly authorized as of the dates
below indicated.
District Engineer (or designee)
Iowa Department of Transportation
Date
City representative
Date
Printed name and title of city representative
County representative
Date
Printed name and title of county representative
7
Detour Direction
Detour Route
Ramp Closure
skoontz10:29:11 pw:\\projectwise.dot.int.lan:PWMain\Documents\Projects\8503002019\Design\(310) - Grade and New (Westbound)\SHT_85030310_J53.dgn
DESIGN TEAM PROJECT NUMBER SHEET NUMBER COUNTY
26/06/2026
ENGLISHFILE NO.
S
K
E
L
L
O
G
G
S 17TH ST
S 16TH ST
S
H
I
G
H
A
V
E
SE 16TH ST
CHESTNUT
ST
BU
C
K
E
Y
E
A
V
E
AIRPORT RD
S
D
U
F
F
A
V
E
CIR
CRYSTAL ST
ST
CI R
TURQ
UO
ISE ONYX
CIR
DIAMOND
SE 16TH ST
Ames Municipal
Airport
AIRPO
RT
DR
OPAL CIR
CI R
SA
P
P
H
I
R
E
S
D
A
Y
T
O
N
A
V
E
DR
SE 18TH ST
AVE
BILLY SUNDAY RD
KITTY HAWK DR
CRYSTAL ST
RUBY
CT
ONYX ST
CT
AV
E
EVA
S
B
E
L
L
A
V
E
HYATT CIR
S
D
A
Y
T
O
N
P
L
AI
R
P
O
R
T
C
T
ASPEN RIDGE RD
GARDEN RD
DIAMON
D
TOPAZ
FRO
NTAGE RD
ISAAC
AS
P
E
N
DR
LD
E
N
GO
GRAND AVE
Ioway Creek
NEWTON
INTERSTATE
35
DETOUR DETOUR DETOURDETOURDETOUR END
DETOUR
48" x 30"
R11-2
ROAD
CLOSED
1
48" x 48"
W20-2DETOUR
AHEAD
SIGN
CUSTOM
M1-4, 24" X 24"
M4-3, 24" X 12"
M3-4, 24" X 12"
M5-1L, 21" X 15"
M4-3, 24" X 12"
M3-4, 24" X 12"
M6-1L, 21" X 15"
M4-3, 24" X 12"
M3-4, 24" X 12"
M6-3, 21" X 15"
M4-3, 24" X 12"
M3-4, 24" X 12"
M5-1R, 21" X 15"
M4-3, 24" X 12"
M3-4, 24" X 12"
M6-1R, 21" X 15"
24" X 18"
M4-8A
2 3 4 5 6 7 8 9 10 11
1
1
RAMP CLOSED
FOLLOW DETOUR
WEST
2
2
30
ESTW
M1-4, 24" X 24"M1-4, 24" X 24"M1-4, 24" X 24"M1-4, 24" X 24"
ESTW ESTW ESTW ESTW
30 30 30 30
4
6
S DAYTON AVE
7
34
DETOUR
DETOUR
M4-3, 24" X 12"
M3-4, 24" X 12"
M5-2R, 21" X 15"
M4-3, 24" X 12"
M3-4, 24" X 12"
M6-2R, 21" X 15"
ESTW
30 M1-4, 24" X 24"
ESTW
30 M1-4, 24" X 24"
10
89
11
30
Duff Ave Ramp C
Duff Ave Ramp A
Duff Ave Ramp D
Loop F
Duff Ave
B pmaR evA ffuD
B pmaR evA notyaD
C pmaR evA notyaD
A pmaR evA notyaD
D pmaR evA notyaD
- Sign Placement Not to Scale -
for Additional Safety Closure and Sign Layouts
Refer to Traffic Control Plan Sheets
30
3
30 24" X 24"
M1-4
DETOUR ROUTE
DAYTON AVE RAMP C
WHKS & CO.STORY NHSX-030-5(310)--3H-85 J.53
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8