Section 10 Navigable Waters include those waters subject to the ebb and flow of the tide shoreward to the mean high water mark and/or those waters that are presently used, or have been used in the past, or may be susceptible for use to transport interstate or foreign commerce. Section 10 Navigable Waters are regulated under the Rivers and Harbors Act of 1899. Please note that inland rivers along the coast may be tidally influenced a significant geographic distance inland from ocean waters and those tidally influenced river areas would also be regulated under Section 10 of the Rivers and Harbors Act.

Interactive map with the approximate boundaries of the non-tidal Section 10 Navigable Waters

Alaska District: Non-Tidal Section 10 Navigable Waters List

The following is a list of non-tidal Section 10 Navigable Waters in Alaska. Tidally influenced Section 10 Navigable Waters are not listed below.

Number	Waterway Name	Navigable Length (Miles)	Navigability Descriptions
1	Aleknagik Lake	24	Entire length and breadth.
2	Becharof Lake	43	Entire length and Breadth; Empties into Egegik River.
3	Big Lake	5	Entire length and breadth. Drainages from Big Lake to tidal waters are not navigable.
4	Buckland River	40	Navigable 40 miles upstream to junction with the West Fork Buckland River.
5	Campbell Lake	Entire	Entire length and Breadth.
6	Chatanika River	139	Navigable 139 miles upstream to the junction with Long Creek.
7	Chena River (including Noyes Slough)	Entire	Navigable 258 miles upstream to the junction with the Etivluk River.
8	Colville River	258	Navigable 139 miles upstream to the junction with Long Creek.
9	Copper River	287	Navigable upstream for 287 miles.
10	Eagle River	24	Navigable 24 miles upstream to the Eagle River Visitors Center.
11	Eek River	20	Navigable 20 miles upstream from the Kuskokwim River.
12	Egegik River	28	Navigable for entire Length.
13	Eyak River	5	Navigable 4.5 miles upstream from tidal waters.
14	Iditarod River	340	Navigable 340 miles upstream from the Innoko River .
15	Iliamna Lake	70	Entire length and breadth.
16	John River	105	Navigable 105 miles upstream to the junction with the Hunt Fork John River.
17	Kantishna River	100	Navigable 100 miles upstream to junction with Bearpaw River.
18	Kasilof River	6	Navigable 6 miles upstream to the Sterling Highway bridge crossing.
19	Kenai Lake	20	Entire length and breadth.
20	Kenai River	81	Navigable for entire length.
21	Kobuk River	200	Navigable 200 miles upstream from tidal waters.
22	Koyukuk River	544	Navigable entire length from Yukon River to the junction with the North and Middle Fork Koyukuk Rivers.
23	Kuparuk River	52	Navigable 52.2 miles upstream to the junction with the Toolik River.
24	Kuskokwim River	400	Navigable 400 miles upstream to McGrath.
25	Kuzitrin River	15	Navigable 15 miles upstream to junction with Davidson's Slough.
26	Kvichak River	50	Navigable 50 miles upstream to Iliamna Lake.
27	Lake Clark	45	Entire length and Breadth to Newhalen River.
28	Lake Louise	8	Entire length and breadth.
29	Little Susitna River	84	Navigable 84 miles upstream to the Schrock Road Bridge.
30	Matanuska River	75	Navigable 75 miles upstream to junction with Caribou Creek.
31	Naknek River	20	Navigable 19.5 miles upstream from tidal waters.
32	Nenana River	80	Navigable 80 miles upstream to the Parks Highway Bridge.
33	Noatak River	400	Navigable 400 miles upstream to junction with Portage Creek.
34	Noyes River	Entire	Entire length to Chena River.
35	Nushagak River	34	Navigable 14 miles upstream from tidal waters.
36	Porcupine River	225	Navigable 225 miles upstream to the Canadian Border.
37	Sagavanirktok River	160	Navigable 160 miles upstream to junction with the Atigun River.
38	Selawik River	50	Entire length and breadth.
39	Skilak River	13	Entire length and breadth.
40	Snake River	0	Entire area of the authorized USACE project at the Port of Nome.
41	Stikine River	30	Navigable upstream for 30 miles to Canadian Border.
42	Susitna River	115	Navigable upstream for 115 miles to junction with Deadhorse Creek.
43	Tanana River	455	Navigable upstream for 455 miles to the junction with Nabesna River and Chisana River.
44	Tolonava River	135	Navigable upstream for 135 miles.
45	Tustumena River	23	Entire length and breadth.
46	Ugashik River	Entire	Navigable for entire length.
47	Willow Creek (Willow, AK)	4	Navigable upstream 4 miles from the Susitna River to the Parks Highway Bridge.
48	Wood River and Lakes (Dillingham, AK)	48	Navigable for entire length including Lake Aleknagik.
49	Yukon River	1432	Navigable upstream for 1,432 miles to the Canadian Border.

Photo by Jonathan Hegna