Bridge and Culvert Inventory Markers - Revision history

Jonathan: Added Lincoln County bridge inventory marker section

2026-01-09T21:40:17Z

Added Lincoln County bridge inventory marker section

Jonathan: Updated Clackamas County and stubbed out Lincoln County

2026-01-09T02:26:18Z

Updated Clackamas County and stubbed out Lincoln County

Jonathan: Added photos and supplemental information on Beaverton bridge markers

2025-11-19T00:36:36Z

Added photos and supplemental information on Beaverton bridge markers

Jonathan: Update Beaverton marker descriptions

2025-11-18T08:47:05Z

Update Beaverton marker descriptions

Jonathan: Added Marion County culvert marker; slightly edited photo caption for Polk County bridge marker

2025-07-10T04:26:51Z

Added Marion County culvert marker; slightly edited photo caption for Polk County bridge marker

Jonathan: Added two new Linn County markers in a new style; updated Linn County marker descriptions; updated ODOT standard drawing links

2024-07-13T09:58:57Z

Added two new Linn County markers in a new style; updated Linn County marker descriptions; updated ODOT standard drawing links

Jonathan: Added green culvert marker along OR-51

2022-12-24T10:18:43Z

Added green culvert marker along OR-51

Jonathan: Added Polk County bridge inventory marker information

2022-12-23T10:25:46Z

Added Polk County bridge inventory marker information

Jonathan: Added Clackamas County culvert markers

2022-09-24T05:52:14Z

Added Clackamas County culvert markers

Jonathan: Added three photos of green wicket mileposts

2022-09-23T18:20:04Z

Added three photos of green wicket mileposts

@@ Line 126: / Line 126: @@
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 === Lincoln County ===
-{{stub|part=section}}
+Lincoln County appears to place bridge markers on its bridges, though the only one currently observed was on the Rocky Creek Bridge on the Otter Crest Loop (old US-101) near Depoe Bay. They are similar in height to ODOT bridge markers, but appear to be narrower. Unlike ODOT markers, they are not reflective, instead featuring a dark green background. In addition, all text on the marker is the same size of yellow-orange FHWA Series B typeface.
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@@ Line 83: / Line 83: @@
 === Clackamas County ===
-Clackamas county does not place inventory markers on its bridges, but does utilize two different kinds of culvert markers on its roads:
+Clackamas county does not place inventory markers on its bridges, but does place stickers on the back of object markers (such as OM-3L and OM-3R markers) with its ODOT bridge number.
 * White metallic rounded rectangles, marked at culverts in hundredths of a mile
@@ Line 90: / Line 92: @@
 Each of these markers contains the mileage in tenths or hundredths of a mile and a 5-digit county road number. This number can sometimes span two different roads if they comprise a longer route, such as Stafford and Wilsonville Roads.
-At jurisdictional boundaries, the white markers can also sometimes be found with "BCM" and "ECM", for "begin county maintenance" and "end county maintenance" respectively, depending on the direction of travel. On the wickets, no other information (such as mileposts or road numbers) are present; the metal rectangle versions of these posts ''can'' contain the road number, but again no mileage is indicated.
+At jurisdictional boundaries, the white markers can also sometimes be found with "BCM" and "ECM", for "begin county maintenance" and "end county maintenance" respectively, depending on the direction of travel. Mileage may be present on the wicket style of "ECM" markers, and the metal rectangle versions of "BCM" markers contain the road number without a milepost (likely because it's implied to be MP 0). Other variants may exist in the wild.
 Zero mileposts can be found in both types.
@@ Line 121: / Line 123: @@
 -11-28_youngs-river-rd-wicket-mp_6595.jpg|A green wicket culvert milepost at MP 0.009 on Youngs River Road near Olney, 2021
 </gallery>
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 [[File:Mp-county-linn-bridge.png|60px|thumb]]
 === Linn County ===

@@ Line 197: / Line 197: @@
 * A third (possibly the newest) version has "BB" (presumably for "Beaverton Bridge") above, the City of Beaverton's logo in the middle (with the "Oregon" this time), and the bridge number below. The "BB" and bridge number are both in white FHWA Series C. The bridge number is also larger than previous versions.
-Beaverton appears to use three digits with leading zeroes (e.g. "004") to identify bridges it has built itself. However, the city may also retain the numbers of bridges it takes over from other jurisdictions. This could be the case with the Johnson Creek Bridge on SW Hart Road, which has the number "19051"; this number more closely resembles those used by Washington County.
+On the first two types of marker, Beaverton appears to use three digits with leading zeroes (e.g. "004") to identify bridges it has built itself; leading zeroes are dropped from the third marker type (e.g. "16"). However, the city may also retain the numbers of bridges it takes over from other jurisdictions. This could be the case with the Johnson Creek Bridge on SW Hart Road, which has the number "19051"; this number more closely resembles those used by Washington County.
 In addition to bridges, Beaverton occasionally places similar markers at its culverts. These markers have the design of the "newest" bridge markers, but with "BC" (presumably for "Beaverton Culvert") on top.
 <gallery widths="180px" heights="120px" class="center">
 -07-04_beaverton-bridge-marker_3682.jpg|A Beaverton bridge inventory marker with city logo on Hall Blvd., 2021
--07-04_beaverton-bridge-marker-seal_3703.jpg|A Beaverton bridge inventory marker with city seal on Broadway, 2021
+-11-18_beaverton-bridge-marker-bb-16_02.jpg|A two-digit Beaverton bridge inventory marker with city logo and "BB" on SW Davis Rd., 2025
 -07-04_beaverton-culvert-marker_3698.jpg|A Beaverton culvert inventory marker with city logo on SW Griffith Dr., 2021
 </gallery>

@@ Line 188: / Line 188: @@
 == City Roads ==
-[[File:Mp-city-beaverton-bridge-culvert-examples.png|192px|thumb]]
+[[File:Mp-city-beaverton-bridge-culvert-examples.png|258px|thumb]]
 === Beaverton ===
-The City of Beaverton has placed at least two different versions of small green markers at its bridges. The legend at the top of both versions says "Beaverton Bridge" in FHWA Series B. Below there:
+The City of Beaverton has placed at least three different versions of small green markers at its bridges:
-* One (possibly older) version has the City of Beaverton's centennial seal in the middle, with a white box below containing a green "BB-" (presumably for "Beaverton Bridge") and the bridge number in FHWA Series B.
+* One (possibly older) version has "Beaverton Bridge" in FHWA Series B on top, the City of Beaverton's centennial seal in the middle, and a white box below containing a green "BB-" (presumably for "Beaverton Bridge") and the bridge number in FHWA Series B on the bottom.
-* Another (possibly newer) version has the City of Beaverton's logo in the middle (omitting the "Oregon") with the bridge number in white FHWA Series C lettering below.
+* Another (possibly newer) version retains the same "Beaverton Bridge" on top, but with the City of Beaverton's logo in the middle (omitting the "Oregon") and the bridge number in white FHWA Series C lettering on the bottom.
-In addition, Beaverton places similar markers at its culverts. These markers have the design of the "newer" bridge markers, with "BC" (presumably for "Beaverton Culvert") on top and the city logo in the middle. Unlike the bridge markers, these ones keep the word "Oregon" in the logo. The culvert number is also larger on these markers than the bridge markers, and is in FHWA Series D.
+Beaverton appears to use three digits with leading zeroes (e.g. "004") to identify bridges it has built itself. However, the city may also retain the numbers of bridges it takes over from other jurisdictions. This could be the case with the Johnson Creek Bridge on SW Hart Road, which has the number "19051"; this number more closely resembles those used by Washington County.
 <gallery widths="180px" heights="120px" class="center">

@@ Line 136: / Line 136: @@
 -07-12_linnco-inventory-marker_7835.jpg|A bridge inventory marker at MP 0.26 on Stayton-Scio Drive, 2024
 </gallery>
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 [[File:Mp-county-polk-bridge.png|60px|thumb]]
 === Polk County ===
@@ Line 145: / Line 157: @@
 <gallery widths="180px" heights="120px" class="center">
--12-21_polkco-inventory-marker_2861.jpg|A bridge inventory marker for the bridge over Baskett Slough at MP 2.31 on Rickreall Road, 2022
+-12-21_polkco-inventory-marker_2861.jpg|An inventory marker for the bridge over Baskett Slough at MP 2.31 on Rickreall Road, 2022
 </gallery>

@@ Line 50: / Line 50: @@
 === Culvert and Stormwater Facility Markers ===
-Around 2013, ODOT started placing standardized markers at culverts and stormwater facilities. For culverts, two types of markers are defined in [https://www.oregon.gov/ODOT/Engineering/202001/RD398.pdf ODOT Standard Drawing RD398], aptly named Type 1 and Type 2.
+Around 2013, ODOT started placing standardized markers at culverts and stormwater facilities. For culverts, two types of markers are defined in [https://www.oregon.gov/odot/engineering/202207/RD398.pdf ODOT Standard Drawing RD398], aptly named Type 1 and Type 2.
 * '''Type 1''' markers are 4″ × 6–12″ strips of green thermoplastic tape affixed to the road, with no other information added.
 * '''Type 2''' markers are 3½″ × 13¼″ white panels with a green stripe at the top. "ODOT" appears above the stripe. A number appears below the stripe — either the Drainage Facility ID (or "DFI number") if the culvert span is less than 6 feet, or the Bridge Structure ID if the culvert span is between 6 and 20 feet. Below the number is the culvert milepoint. All text on the marker is FHWA Series C, called "Type C font" in the drawing.
-Stormwater facilities have three types of markers defined in [https://www.oregon.gov/ODOT/Engineering/202001/RD399.pdf ODOT Standard Drawing RD399], named Type S1, S2 and S3.
+Stormwater facilities have three types of markers defined in [https://www.oregon.gov/odot/engineering/202207/RD399.pdf ODOT Standard Drawing RD399], named Type S1, S2 and S3.
-* '''Type S1''' markers are flexible plastic posts embedded into the ground in two colors, red and green. Red posts signify the start of a stormwater facility maintenance area, and green posts signify the end of the maintenance area. Dimensions are the same as [https://www.oregon.gov/odot/engineering/202007/TM570.pdf ODOT TM570 Type 2 flexible plastic posts], but these omit the 4″ reflective sheeting bands. No other information is added to these posts.
+* '''Type S1''' markers are flexible plastic posts embedded into the ground in two colors, red and green. Red posts signify the start of a stormwater facility maintenance area, and green posts signify the end of the maintenance area. Dimensions are the same as [https://www.oregon.gov/odot/engineering/202207/TM570.pdf ODOT TM570 Type 2 flexible plastic posts], but these omit the 4″ reflective sheeting bands. No other information is added to these posts.
 * '''Type S2''' markers are the same size as the Type 2 culvert markers above, and have a similar design. A Type S2's top color band is blue instead of green, and the milepoint is replaced by a 5″ × ¼″ black stripe which can be optionally turned into an arrow to indicate the direction or location of the stormwater facility. Otherwise, both Type 2 and Type S2 display the same information.
 * '''Type S3''' markers are essentially DFI numbers stamped onto access covers like manholes and vaults to identify underground stormwater facilities. For durability, ink is not used.
@@ Line 128: / Line 128: @@
 === Linn County ===
-Linn County places inventory markers on its bridges that displays information like road number, milepoint, bridge number, road name and body of water crossed. These usually appear on both sides of the bridge and use some form of Helvetica for the typeface.
+Linn County places inventory markers on its bridges that displays information like road number, milepoint, bridge number, road name and body of water crossed. These usually appear on both sides of the bridge and use some form of Helvetica for the typeface. Newer versions of these markers use a reflective sheeting, have a border and incorporate rounded corners.
 <gallery widths="180px" heights="120px" class="center">
 -08-13_linnco-inventory-marker_3258.jpg|A bridge inventory marker at MP 1.16 on Hofer Road, 2016
 -08-13_linnco-inventory-marker_3330.jpg|A bridge inventory marker at MP 0.15 on Higbee Road, 2016
 </gallery>
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@@ Line 65: / Line 65: @@
 * Some highways, such as stretches of [[US Route 101|US-101]] and [[Oregon Route 6|OR-6]] near Tillamook, have white paddles with a white button reflector affixed to the top and the milepoint in black Series B towards the bottom. These almost always appear to be found in locations with guardrails and almost always are accompanied by a Type 1 culvert marker on the ground and/or the guardrail. Many of these appear weathered, indicating that they may be years or decades old.
 * A section of [[Oregon Route 224|OR-224]] from roughly Carver to Barton has small yellow markers with the milepoint in black FHWA Series C text and a reflective blue circle below. These appear to mark the locations of culverts or other drainage facilities. The milepoints correspond to the mileage along the Clackamas Highway #171.
-* A section of [[Oregon Route 221|OR-221]] south of Dayton has small, narrow green markers at locations of culverts. A circular ODOT logo is on top with sections below for other information about the culvert, including milepoint, kilometerpoint, diameter in inches, length in feet, type, description, and reference point in feet. An Oregon Utility Notification Center "Stop - Call Before You Dig!" logo is at the bottom. Curiously, many of these markers omit all information except the description (usually "CULVERT"). Other state highways in the area may also have these markers.
+* A couple highways in the central Willamette Valley (a section of [[Oregon Route 221|OR-221]] south of Dayton, [[Oregon Route 51|OR-51]] in Independence, possibly more) have small, narrow green markers at locations of culverts. A circular ODOT logo is on top with sections below for other information about the culvert, including milepoint, kilometerpoint, diameter in inches, length in feet, type, description, and reference point in feet. An Oregon Utility Notification Center "Stop - Call Before You Dig!" logo is at the bottom. Curiously, many of these markers along [[Oregon Route 221|OR-221]] omit all information except the description (usually "CULVERT"). For comparison, the one along [[Oregon Route 51|OR-51]] in Independence has the information affixed to the post using stickers; the text is white on a green background in FHWA Series B and/or C.
 <gallery widths="180px" heights="120px" class="center">
 -05-28_state-stormwater-marker_1434.jpg|A Type S2 stormwater facility inventory marker at the northern terminus of OR-127 near Linnton, 2021
 -07-10_odot-yellow-culvert-marker_3741.jpg|A yellow culvert marker on OR-224 between Carver and Barton, 2021
--03-30_state-culvert-marker_6716.jpg|A green culvert marker on OR-221 south of Dayton, 2018
+-03-30_state-culvert-marker_6716.jpg|An empty green culvert marker on OR-221 south of Dayton, 2018
 </gallery>

← Older revision		Revision as of 05:52, 24 September 2022
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	Not all counties place inventory markers on their bridges or at their culverts.		Not all counties place inventory markers on their bridges or at their culverts.
		+
		+	[[File:Mp-county-clackamas-culvert-examples.png\|108px\|thumb]]
		+	=== Clackamas County ===
		+
		+	Clackamas county does not place inventory markers on its bridges, but does utilize two different kinds of culvert markers on its roads:
		+
		+	* White metallic rounded rectangles, marked at culverts in hundredths of a mile
		+	* White delineator wickets embedded in the ground, also marked at culverts in hundredths of a mile
		+
		+	Each of these markers contains the mileage in tenths or hundredths of a mile and a 5-digit county road number. This number can sometimes span two different roads if they comprise a longer route, such as Stafford and Wilsonville Roads.
		+
		+	At jurisdictional boundaries, the white markers can also sometimes be found with "BCM" and "ECM", for "begin county maintenance" and "end county maintenance" respectively, depending on the direction of travel. On the wickets, no other information (such as mileposts or road numbers) are present; the metal rectangle versions of these posts ''can'' contain the road number, but again no mileage is indicated.
		+
		+	Zero mileposts can be found in both types.
		+
		+	<gallery widths="180px" heights="120px" class="center">
		+	2013-09-02_clackco-100ths-milepost_7354.jpg\|A white rectangular milepost on SW Homesteader Rd. near Stafford, 2013
		+	2017-10-25_clackco-100ths-flag-milepost_3748.jpg\|A white wicket milepost on SE Fireman Way in Boring, 2017
		+	2017-10-25_clackco-100ths-milepost_4230.jpg\|A white rectangular milepost on E Salmon St. near Brightwood, 2017
		+	2020-02-29_clackco-begin-co-maint-marker_141904426.jpg\|A white "begin county maintenance" marker on SW Ladd Hill Rd. near Sherwood, 2020
		+	2021-05-23_clackco-begin-county-maint-marker_1028.jpg\|A white "begin county maintenance" wicket on SW Carman Dr. in Lake Oswego, 2021
		+	2021-05-23_clackco-end-county-maint-marker_1014.jpg\|A white "end county maintenance" wicket on SW Carman Dr. in Lake Oswego, 2021
		+	</gallery>
		+	<br clear="all" />

	[[File:Mp-county-clatsop-bridge-examples.png\|182px\|thumb]]		[[File:Mp-county-clatsop-bridge-examples.png\|182px\|thumb]]

@@ Line 86: / Line 86: @@
 In addition, Clatsop County places street sign blade-sized signs at the bridge itself, mounted on a taller post presumably for motorist assistance. These signs display the waterway name in large text, with the Clatsop County bridge number and bridge name below it in much smaller lettering. All text on this sign is in FHWA Series B. Like the 2015-era mileposts, these also have "Clatsop County" stamped in them, as well as the date of installation written on them in permanent marker; for example, the sign at Humbug Creek was installed in October 2012.
-At culverts, Clatsop County uses green wickets with an orange reflective square and the milepoint below in tenths, hundredths or ''thousandths'' of a mile, without identifying any sort of road name or number. The typeface used is a thinner stroke version of Helvetica Inserat Roman.
+At culverts, Clatsop County uses green wickets with an orange reflective square and the milepoint below in tenths, hundredths or even ''thousandths'' of a mile, without identifying any sort of road name or number. The typeface used is a thinner stroke version of Helvetica Inserat Roman.
 <gallery widths="180px" heights="120px" class="center">
@@ Line 92: / Line 92: @@
 -01-02_clatsopco-bridge-sign_212359329.jpg|A bridge sign for the Humbug Bridge over Humbug Creek on Lower Nehalem Road, 2021
 -03-23_clatsopco-milepost-flag_1129.jpg|A green wicket culvert marker at MP 9.02 on Lower Nehalem Rd., 2014
 </gallery>